TECHNICAL SPECIFICATION

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					               TECHNICAL SPECIFICATION

TECHNICAL SPECIFICATIONS-MATERIALS

GENERAL :

a. All materials to be used in the execution of Civil & structural works shall
   be governed by the requirements of this specification.
b. Whenever any reference to IS codes is made, the same shall be taken
   as the latest revision (with all amendments issued thereto) as on the
   date of submission of the bid.
c. Apart from the IS codes mentioned in particular in various clauses of
   this specification, for a specific work under consideration all other
   relevant codes regarding quality, testing and/or inspection procedures
   shall be applicable. Reference to some of the codes in the various
   clauses of this specification does not limit or restrict the scope of
   applicability of other referred or relevant codes.
d. In case of any variation/contradiction in provisions between IS codes
   and this specification, the provisions given in this specification shall be
   followed      with     the     approval      of     the     Engineer      In
   Charge/consultant/architect.
e. All materials shall be of standard quality and shall be procured from
   renowned       sources/manufacturers       approved        by    the    EIC
   /Architect/Consultant. It shall be the responsibility of the contractor, to
   get all materials approved prior to procurement and placement of
   order.
f. Quality and acceptability of materials not covered under this
   specification shall be governed by the relevant IS codes. In case IS
   code is not available for the particular material, other codes e.g. BS or
   ASTM shall be considered. The decision of the Engineer In Charge/
   consultant/ architect in this regard shall be final and binding on the
   contractor.
g. Whenever asked for, the contractor shall submit representative
   samples of materials to the client for inspection and approval.
   Approval of any sample does not necessarily exempt the contractor
   from submitting necessary test reports for the approved material, as
   per the specification / relevant IS codes.
h. The contractor shall submit manufacturer’s test reports on quality and
   suitability of any material procured from them and their
   recommendation on storage, application, workmanship etc. for the
   intended use. Submission of manufacturer’s test reports does not
   restrict the client/consultant from asking for fresh test results from an
   approved laboratory of the actual material supplied from any
   approved manufacturer/source at any stage of execution of work.
i. All costs relating to or arising out of carrying out the tests and
   submission of test reports and or samples to the client/consultant for
   approval during the entire tenure of the work shall be borne by the
   contractor and included in the quoted rates.
j. Materials for approval shall be separately stored and marked, as
   directed by the client/consultant and shall not be used in the works till
   these are approved. The contractor at his own cost shall immediately
   remove all rejected materials from the site.

K.     In the event that state, city or other Government bodies have
                    requirements, more stringent than those set forth in this
specification, such              requirements shall be considered part of
this specification and shall                   supersede this specification
where ever applicable.

L.    The quality of materials , method and control of manufacture and
            transportation of all concrete works irrespective of the mix ,
whether                   reinforced or otherwise, shall conform to the
applicable portion of this            specification.

M.    Engineer shall have the right to inspect the source/s of material/s ,
the          layout of operations of procurement and storage of
materials. Such an            inspection shall be arranged and appval
of Engineer-In-Charge                shall be obtained prior to starting of
concrete work.

N.    Concrete shall be mixed by mechanical mixer only and no hand
mixing           shall be allowed for CC works.

NOTE : In case of any contradiction between description of item given in
the bill            of quantities ( BOQ) and that given in the technical
specification , the      former i.e. BOQ shall be followed.



EARTHWORK:

1.SETTING OUT AND MAKING PROFILE:

Masonry pillars will be erected at suitable points. These bench mark shall
be connected to standard bench mark. In addition to these pillar center
line pillars shall also be erected by the Contractor and footing positions
shall be marked with the help of these pillars. The necessary profile shall
be set out. The level shall be taken at a interval as directed by IEC.
The levels shall be recorded in field books and plotted on plan before
starting the excavation.

2. EXCAVATION FOR FOUNDATION:
The cutting shall be done to minimum depths as per drawings and as
advised by EIC. Any excess excavation carried out by the Contractor
without proper permission from EIC shall not be paid and the excess depth
shall be made good by the Contractor by PCC 1:4:8 at contractor’s own
cost.

BACKFILLING:

In case water is encountered during the excavation for foundation, or
flooding of pits due to any other reasons the contractor shall arrange for
dewatering the same at his own cost.

2.1 EXCAVATION IN HARD ROCK:
CUTTING
Where hard rock is met, generally excavation by chiseling and wedging
shall be carried out. Excavation by blasting shall be done only after
taking all safety precautions and approvals as required and after
obtaining written approvals from Engg.-in-Charge/Architects. In case of
excavation by blasting all the provisions of explosive rules 1940 (Corrected
upto date) shall be complied with storing, transportation and handling of
explosive materials. The blasting operation shall be carried out under the
supervision of a responsible authorised agent of the contractor. Blasting
work shall not be carried out within 200 metres of an existing structure
unless otherwise permitted by the Engg.-in-Charge / Architects.

3.0.0 MATERIALS FOR FILLING

3.1.0 SAND

15.1.1 Sand used for filling shall be clean river sand hard, gritty, dry and
coarse, free from earth, silt organic matter, clay and other deleterious
materials.

3.2.0 MOORUM

3.2.1 QUALITY OF MOORUM:
The moorum shall be naturally occuring material formed by disintegration
of rock. It shall be free from vegetarian, rubbish or material of organic
origin and scales deleterious to concrete and reinforced concrete.

Pieces of hard rock which do not get crushed under the roller shall not
exceed 50mm size.

3.2.2 FILLING:

Filling shall be done in 15 cm thick layers and every layer shall be power
rolled with 8/10 ton roller so as to achieve maximum compaction and till
such time that no further movement is observed under the wheels of the
roller. Hand rolling is permissible in case filling is done inside sales building.

After filling is completed the modified procter density shall be 92% with
OMC.

Before start of work the contractor shall supply the samples of murrum
from each quarry to cover the variations expected in the supply. The
samples shall be tested for the following in a recognised laboratory in
accordance with IS:2720 for the following.

Silt and clay content.
Moisture-content and dry density relationship at modified Procter density.

Moisture Control: Water shall be always sprayed and not poured.
Ponding shal never be allowed. In wet weather the work may have to be
carried out by using suitable safeguards without any extra cost. Care shall
be taken to see that moisture is uniformly spread throughout the layer and
where necessary mixing with harrows and rakes shall be done.

Measurements: Measurements shall be of the cubic contents of the
completed filing and shall be determined by taking level of testing ground
and after final layer for each type of filing. All dimensions are for
compacted thickness.

4.0.0        CEMENT

Unless otherwise specified ordinary Portland cement of 43 grade
conforming to IS:8112 shall be used for all concrete works.However OPC
grade 53 may be used after approval of EIC.
4.1.0       SUPPLY :
Cement used shall be one of the following with prior approval of the
Engineer In Charge/ consultant / architect.

a. Grade 33 Ordinary Portland cement conforming to IS:269
b. Grade 43 Ordinary Portland Cement conforming to IS:8112.
c. Grade 53 Ordinary Portland Cement conforming to IS:12269.

Portland Slag Cement conforming to IS:455.

Portland Pozzolana Cement conforming to IS:1489.

Cement to be used shall be of the best quality from reputed brands like
ACC/ Birla/Gujrat Ambuja/L&T /Lafarge /Grasim or any other equivalent
as approved by the Client / consultant.

Where specified, special cement like Sulphate resisting Portland cement
(conforming to IS:8042-E), Coloured cement shall be used.

Rapid hardening cement shall have strength in one day equal to that of
OPC in 3 days. It shall be used for products like Hume pipe, tiles, sleepers,
poles, pre stressed and precast members. It shall also be used for
foundation, bridges, culverts, causeways, etc. where quick construction
activity is required however with prior permission of the
consultant/architect. Test certificates showing that the cement complies
with the specifications must be submitted to the EIC /consultant.

Sulphate resistant cement should possess low heat of hydration, more
compressive strength at 3, 7 and 28 days than OPC. It should be capable
of withstanding attack of aggressive substances like sulphate of sodium,
magnesium, calcium, etc. which damage concrete structures. It shall be
used with prior approval for structures in or near sea water, where the soil
conditions are aggressive, where repeated cycles of drying and wetting
occur and also for structures exposed to sulphate attack like industrial
drains, sewage pipes, foundations, bridges, dams, tunnels. Test certificates
showing that the cement complies with the specifications must be
submitted to the EIC/consultant.

Coloured cement shall be white or grey Portland cement mixed with
pigment as specified in the item of work. It shall comply with physical
requirements of IS:269/8112 and pigments shall be inorganic oxide
pigments either natural or synthetic in origin complying with the
requirements of B.S.:1014. The pigments used for coloured cements shall
be of approved quality and its quantity shall not exceed 10% of cement
used in the mix. The mixture of pigment and cement shall be properly
ground to have a uniform colour and shade. The pigments shall have such
properties as to provide durability under exposure to sunlight and
weather. The pigment shall have the property such that it is neither
affected by the cement nor detrimental to it.

In case more than one type of cement is used in any work, a record shall
be kept showing the location and type of cement used. Each type of
cement shall preferably be obtained from one constant source
throughout the contract. Cement of different types shall not be mixed
with one another. Different brands of cement or the same brand of
cement from different sources shall not be used without prior notification
or approval by client.

The cement shall be supplied to the site in original sealed bags, which
shall be labelled with the weight, name of manufacturer, date of
manufacture, brand and type. Cement received in torn bags shall not be
used. Bags of cement that vary in weight by more than 3% shall not be
accepted.

The contractor shall maintain a daily record of cement received and
consumed in an approved form and a copy shall be submitted to the
engineer-in-charge once a week.

4.2.0 Storage :

4.2.1 Cement bags shall be stored dry, leak proof, moisture proof and
well-ventilated godowns built at the cost of the contractor. Cement of
different types shall be stored in separate godowns or separate
compartments of a godown.

The floor of the godown shall be raised and shall consist of wooden planks
resting on the base prepared with dry bricks laid on edges. Stacking of
cement bags shall have a clearance 150 to 200 mm above the floor and
450 mm from the wall.

Cement shall be stored in stacks, which are not higher than 10 bags to
avoid lumping due to pressure and in such a manner as to permit easy
access for inspection and identification.

The bags shall be kept close together in rows of two bags to reduce
circulation of air as much as possible. The bags shall be arranged in
header and stretcher fashion so as to lessen the danger of topping.
1.2.5 ‘First in’, ‘First out’ rules shall be applied while removing the bags for
use.

1.2.6 Cement stored during monsoons or for an unusually long period,
shall be completely enclosed in polythene sheet which shall cover the top
of the stack. The contractor shall ensure that the polythene sheet is not
damaged at any time during use. Storage under tarpaulins shall not be
permitted.

1.27 No stored cement bag shall be used after three months from the
date of manufacture. Generally, stacking and storing of cement shall be
in accordance with Clause 3.2 of IS:4082.

4.3.0 Quality of cement.

1.3.1 The manufacturer shall satisfy himself that the cement conforms to
the relevant Indian standards and if required, shall furnish a certificate to
this effect to the purchaser or his representative within ten days of the
despatch of the cement.

1.3.2 The contractor shall be fully responsible for the quality of cement
brought to work site. In case the contractor has any doubt regarding the
quality of cement brought to work site, it is upto him to have it tested at his
own expense and make sure that the cement is of acceptable quality.

4.4.0 Testing :

14.1 The contractor shall submit test certificates furnished by the
manufacturer to client/consult. Where the client/consultant is not
convinced about the quality of cement, he can ask the contractor to
have the cement tested or he can take samples in the presence of
contractor from cement bags stored at work site and forward them to
government approved laboratory for testing. Expenses towards such tests
shall be borne by the contractor.

4.5.0 Sampling :

4.5.1 For one lot of 50 tonnes of cement, 2% of bags shall be picked out
at random, from which one sample of 15 kg shall be taken.

4.5.2 Samples for testing may be taken by the purchaser or his
representative within one week of delivery and all tests shall be
commenced within one week of sampling.
4.5.3 When it is not possible to test the samples within one week, the
samples shall be backed and stored in airtight containers till testing.


causes for rejection :

4.6.1 Cement not conforming to relevant specification shall be rejected
by the client/consultant. the contractor, at his own expense shall
immediately remove rejected cement from the work site.

4.6.2 damaged or reclaimed or partly set cement will not be permitted to
be used and shall be removed from the site.

4.6.3 the minimum requirements for any type of cement to be
considered as acceptable are tabulated in table-A

             TABLE A : PHYSICAL REQUIREMENTS FOR CEMENT.

Type of cement              OPC    OPC 43       OPC 53   PPC         PSC
                            33     Grade        Grade
                            Grade
Code NO.                    IS:269  IS:8112        IS     IS 1489     IS
                                                 12269               455
Fineness by Blaine’s         225          225     225          300   225
method (sq.m/kg),min.
Setting time (mins)
Initial(More than)           30            30     30           30    30
Final (Less than)            600          600     600          600   600
Loss on ignition (Max %)      5             5      4            5     4
Insoluble Residue (Max %)     4             2      2     {0.96X      2.5
                                                         +4}X=% of
                                                         Pozzolana
Soundness (Max)             10      10          10       10          10
Lechatelier (mm)            0.8     0.8         0.8      0.8         0.8
Autoclave (%)
Compressive Strength
*(Min) (N/sq.mm)
7 days                      22      33          37       22          22
28 days                     33      43          53       31          --

 Compressive strength test shall be carried out on 70.70x70.70x70.70 mm
mortar cubes made from cement and sand (conforming to IS 650) mixed
in the proportion of 1:3.0
4.7 WORKMASNSHIP

The use of bulk cement will be permitted only with the approval of EIC.
Changing of brands or type of cement within the same structure will not
be permitted.

CONTRACTOR will have to make his own arrangements for the storage of
adequate quantity of cement. Cement bags shall be stored in a dry
enclosed shed (storage under tarpaulin will not be permitted), well away
from the outer walls and insulated from the floor to avoid contact with
moisture from ground and so arranged as to provide ready access.
Damaged or reclaimed or partly set cement will not be permitted to be
used and shall be removed from the site. Not more than 12 bags shall be
stacked in any tier. The storage arrangement shall be approved by
engineer. Consignment of cement shall be stored as received and shall
be consumed in the order of their receipt at site.

Cement held in storage for a period of Ninety (90) days or longer shall be
tested. Should at any time Engineer have reasons to consider that any
cement is defective, then irrespective of its origin, date of manufacture
and/or manufacturer’s test certificate, such cement shall be tested
immediately at Contractor’s cost . It shall not be used in any work unless
confirmed by approved lab after testing. Contractor shall not be entitled
to any claim of any nature on this account.



5.0.0 AGGREGATES

Aggregates for concrete shall be procured from approved sources
conforming to the specifications of IS:383 and shall be chemically inert,
clean, strong, durable, with limited porosity and free from deleterious
materials which cause corrosion of reinforcement or may impair the
strength and durability of concrete. Aggregates shall not contain water-
soluble sulphur trioxide in excess of 0.1%. The chloride ion content of fine
and coarse aggregate shall not exceed .06% and 0.02% respectively by
mass of dry aggregate. If either aggregate exceeds these limits the
material may still be considered acceptable by the engineer provided
that the total chloride ion concentration derived from the aggregate is
not grater than 0.35% by mass of the cement in the mix.

All aggregates shall comply with IS:2386 and IS:383 in respect of impurities
and additionally with the following :
a)Absorption
6% maximum by weight for ordinary construction and 2% maximum for
water proof construction.

b)Salt
1% maximum (equivalent anhydrous calcium percentage by weight of
cement)

c) Carbonates
  10% maximum by weight.

Unless otherwise specified, fine aggregate shall be imply natural river sand
for the purpose of reinforced concrete work.However stone dust
confirming to IS 2386 may be alloswed by EIC to be used under
exceptional cases.

5.1.0 FINE AGGREGATE :

5.1.1 GENERAL REQUIREMENTS :

a. The maximum size of the sand particles shall be 4.75 mm and down
   graded.
b. The sand shall be free from adherent coatings and shall not contain
   harmful materials such as iron pyrites, coal, mica, slit, clay, alkali, sea
   shell, organic impurities, loam, etc..
c. The maximum quantity of deleterious materials shall not exceed 5
   percent and the limits specified in table 1 of IS:383 when tested in
   accordance with IS:2386 (Part-2).
d. Aggregates, which are chemically reactive with alkalis of cement, shall
   not be used, as it will induce cracking of concrete.
e. Silt and dust present in natural sand shall be limited to 8% by weight. In
   case it is more than 8%, it shall be washed at site with clean water.
   Presence of mica shall not be more than 1% by weight.

5.1.2 Grading :

Fine aggregate with a fineness modulus value less than ‘2’ shall not be
used for reinforced concrete work. The natural sand used for RCC work
shall have a grading conforming to one of the three grading zones given
in the following table (Table B). Fine aggregate conforming to grade IV as
per IS:383 shall not be used for RCC works.
 For coarse sand the grading of sand as determined by the method
 prescribed in IS : 2386 Part I shall be within the limits of grading III given in
 Table B.

 Stone dust shall be obtained by crushing hard stone and the grading shall
 be as determined by the method prescribed in IS:2386 Part I & II. It shall be
 within the limits of grading zone III. The fineness modulus of stone dust shall
 not be less than 1.8. It shall not contain more than 8% of silt as determined
 by field test with measured cylinder. The silt content is found out by
 keeping a sample of stone dust without drying in 200 mm measuring
 cylinder. The quantity of the sample shall be such that it fills the cylinder
 upto 10mm mark. Then clean water shall be added upto 150 mm mark.
 The mixture shall be stirred vigorously and the contents allowed to settle
 for 3 hours. The height of slit visible as settled layer above the stone dust
 shall be expressed as percentage of the height of the stone dust below.
 The stone dust containing more than 8% of silt shall be washed so as to
 bring down the content within the allowable limit.

  When grading falls outside the limits of any particular grading zone of
 sieves, other than 600 micron IS sieve, by a total amount not exceeding
 5%, it shall be regarded as falling within that grading zone.

              TABLE B: GRADING OF FINE AGGREGATE (AS PER IS :383)

IS Sieve    Pecentage
Designation by wight
            passing IS
            Sieve
            Grading Zone       Grading Zone       Grading Zone      Grading zone
            I                  II                 II                IV
10 mm       100                100                100               100
4.75 mm     90-100             90-100             90-100            95-100
2.36 mm     60-95              75-100             85-100            95-100
1.18 mm     30-70              55-90              75-100            90-100
600 micron 15-34               35-59              60-79             80-100
300 micron 5-20                8-30               12-40             15-50
150 micron 0-10                0-10               0-10              0-15

 5.1.3 Sampling and testing :

 a. Fine aggregate shall be subjected to inspection and testing.
 b. The method of sampling for test shall be in accordance with IS:2430.
c. Samples of fine aggregates for testing shall be collected from
   transportation units or stack or stockpiles. Each sample shall be packed
   separately and despatched to the testing laboratory.
d. Packing and marking of samples shall be done in accordance with
   clause 6.0 of IS:2430.
e. The contractor shall furnish test results of samples as may be required
   by the client/consultant.
f. Testing shall be carried out in accordance with IS:2386 (Parts-1 to 8).

5.1.4 Storage :

a. Aggregate shall be stored on a hard surface or a well designed
   platform of concrete, timber, metal or any other approved material so
   as to prevent the mixture of clay, dust, vegetable and other foreign
   matter.
b. Storing and stacking of fine aggregate shall be done in accordance
   with clause 3.5 of IS:4082.
c. While stacking, the aggregate shall not form pyramids resulting in
   segregation of different size particles. The stacks shall be regular.
d. Unless otherwise specified or necessitated by site conditions, stacking
   of fine aggregate shall be sufficiently away from that of coarse
   aggregate.

Coarse aggregate shall mean aggregate of which not less than 95% by
weight is retained on 4.75 mm mesh IS test sieve of IS:2430 and shall
conform to IS:383.


5.2.0 COARSE AGGREGATE :

5.2.1 General Requirements :

Coarse aggregates shall be machine-crushed stone of black trap or
equivalent black hard stone and shall be hard, strong, dense, durable,
clean or procured from quarries approved by the client/consultant.
Generally coarse aggregate shall be cubical in shape and not flake or
elongated.

Aggregates shall be free from injurious amounts of disintegrated pieces,
reactive silica, alkali, harmful salt, organic matters and other deleterious
materials. Coarse aggregates to be used for reinforced cement concrete
work shall not contain any material liable to attack the steel
reinforcement.
The maximum quantity of deleterious materials shall not exceed 5 percent
of the weight of coarse aggregate and the limits specified in Table I of
IS:383 when tested in accordance with IS:2386 (Part-2).

The amount of fine particles occuring in the free state or as loose
adherent shall not exceed 1% when determined by laboratory
sedimentation tests as per IS:2386.

In selecting the aggregates the Contractor shall satisfy and ensure that
the source is suitable for regular supply and a watch shall be maintained
that the particle shape and grading remain reasonably uniform
throughout the progress of work.

The contractor shall arrange to supply coarse aggregates in single size, for
each nominal size, conforming to the grading given in Table 2 of IS:383.
The single sizes shall be combined in suitable proportion to get desired
overall grading of aggregates. The cilent/consultant at his discretion, may
allow the use of “Graded Aggregate” of nominal size, to conform to the
grading specified in Table 2 of IS:383.

5.2.2 Maximum Size :

The maximum size of aggregates shall not be great than one quarter of
the maximum thickness of the member so as to surround all reinforcement.
For heavily reinforced concrete members, the nominal size of aggregate
shall be 5 mm less than the minimum clear distance between the
reinforcement main bar or 5 mm less than the minimum cover to the
reinforcement whichever is smaller.

In reinforced concrete work, unless otherwise specified, nominal maximum
size of coarse aggregate shall be 20 mm and down.


5.2.3 Storage :

a. Generally, storage of coarse aggregate shall conform to clause 3.5 of
   IS:4082. Aggregates shall be stored at site on a hard and dry patch of
   ground, preferably levelled and rolled.
b. Aggregates of various sizes shall be stored in separate stockpiles with
   height not exceeding 1m to prevent coning or segregation. A bottom
   layer of coarse aggregate 100 mm deep shall be undisturbed while
   removing the material for use.
c. If the aggregates are stored at site for a long time, it shall be sieved
   before use, to remove dust, if directed by the consultant.
6 . CONCRETE WORK

MATERIALS FOR STANDARD CONCRETE:
The ingredients to be used in the manufacture of standard concrete shall
consist solely of a standard type portland cement, clean sand, natural
coarse aggregate, clean water and admixtures .


CONSISTENCY:
The consistency of the concrete shall be such that it flows sluggish into the
forms and around the reinforcement without any segregation coarse
aggregate from mortar. The slump tests are mandatory and shall be
carried out at regular intervals so that the consistency concrete can be
monitored.

PLACING OF CONCRETE:
Concreting shall commence only after inspection and approval by EIC.
Shuttering shall be clean and free from deposits of foreign materials and
proper deshuttering agent shall be applied to the surface.
Proper arrangements shall be provided for conveying the concrete at the
place of deposition without disturbing the reinforcement.

COMPACTION:
Concrete shall be compacted immediately after placing by means of
mechanical vibrators.
All RCC works shall be cured for a minimum period of 14 days or more as
advised by EIC.

INSPECTION AND RECTIFICATION OF DEFECTS:

Immediately on removal of forms, the RCC works shall be examined by
the Engg. -in-Charge / Architects before any defects are made good.
The work that has sagged or contains honey combing to an extent
detrimental to the structural safety or architectural concept shall be
rejected.
Surface defects on a minor nature may be accepted and the same shall
be rectified as follows :
a) Bulges due to movement of forms, ridges at forms, ridges at form joints
    shall be carefully chipped and then rubbed with a grinding stone.
b) Honeycombed and other defective areas must be chipped out, the
   edges being out as straight as possible and perpendicular to the
   surface. Shallow patches are first treated with a coat of thin grout (1
   cement : 1 sand) and then filled with mortar similar to that used in
   concrete. Large and deep patches shall be filled up with concrete
   held in place by forms and shall be reinforced.
c) Holes left by bolts shall be filled carefully with mortar. Holes extending
   right through the concrete shall be filled with mortar with a pressure
   gun.
d) The same amount of care to cure the material in patches should be
   taken as with the whole structure.

POST TREATMENT OF SURFACE :
The surface which has to receive plaster or where it has to be joined with
brick masonry walls shall be properly roughened immediately after the
shuttering is removed.
ACCEPTANCE CRITERIA OF CONCRETE WORK :
Minimum of six sample cubes shall be taken for all concreting work
(periodicity as specified in 9.6 of section III) and three cubes shall be
tested after 7 days curing and balance after 28 days curing.
7 Days Test :
The average strength of the three specimens shall be accepted as the
compressive strength of the concrete provided that the difference
between maximum and minimum strength of the three cubes does not
exceed 15% of average strength
In case the 7 days strength is not satisfactory all further work structurally
interlinked with the concrete represented by the samples shall be stopped
till the remaining three cubes are tested for 28 days strength and are
found satisfactory.


28 Days Test :
The tests should generally be carried out on 28th day, but in no case,
should be delayed beyond 35 days. The strength of the cubes shall be as
specified in table above if they are tested on the 28th day. In case, the
cubes are tested after 28 days, the minimum acceptable compressive
strength shall be increased by 1.5 kg/cm2 for each day beyond 28th day.
The acceptance criteria of 28 days test shall be as follows ;
a) If the average compressive strength of three cubes is more or equal to
   the comp. Strength shown in table above, the concrete shall be
   accepted at full rates.
b) If the average comp. Strength of the three cubes is less than specified
   but not less than 75% of the specified strength, the concrete shall be
   accepted at reduced rates at the discretion of EIC. The reduced rate
   shall be calculated on proportionate basis, i.e. for every percent
   decrease in the specified strength the rate shall be reduced by the
   same percentage.
c) If the average compressive strength of the three cubes is less than 75%
   of the specified strength, EIC shall either reject the defective portion or
   get it dismantled along with the structurally connected work as
   considered necessary at the risk and cost of the contractor. EIC may
   also desire to carry out additional tests on the defective work and if on
   the basis of these additional tests, EIC is satisfied about the structural
   adequacy of the concrete the concrete work may be accepted at
   the reduced rate as specified in b) above except, for the reduced
    strength below 75% for which the reduction shall be 1.5 times for every
    percent decrease below 75%
Example : Average compressive strength is 70% of specified strength. The
rate payable shall be 75 - 1 5 (75-70) = 67.5% of tendered rate.
MEASUREMENT
All measurements shall be as per IS 1200


7.0.0 STEEL REINFORCEMENT:

7.1.0 Supply :

Steel reinforcement for concrete shall be round/ribbed bars, unless
otherwise specified and shall comply with he following grades.

(i)High strength deformed steel bars (ii) TMT bars conforming to IS:1786. If
specified, tested quality high yield strength deformed corrosion resistant
steel (CRS) bars from TATA (TISCON-50CRS) , SAIL (HCR-REBARS Gr.M) or
equivalent   conforming to IS:1786 for mechanical properties with
improved corrosion resistance and bond strength shall be used.

 Only new steel shall be delivered to the site and shall be free of mill scale,
loose rust, grease oil, paint or any other deleterious materials which
reduce or destroys bond.

7.2.0 Measurement of Reinforcement :

Measurement relating to nominal mass, dimensions and tolerances of
various types steel shall conform to relevant IS codes.

Reinforcement shall be measured in lengths of bar as actually placed in
position on standard weight basis, no allowance being made in the
weight for rolling margin. Wastage and binding wire shall not be
measured. Authorised overlaps ,Chairs ,splices,spacers and hooks shall
only be measured. Rate quoted shall include the cost of welding if
specified.Payment shall be made as per reinforcement drawings and with
theoritical weights only
7.3.0 Testing :

Test certificates from manufacturer, mill certificates and certificates of
origin shall be submitted for each consignment. Additional tests if required
shall be done as recommended by the cilent/consultant at the
contractor’s own cost. An accredited laboratory shall carry out testing.
Any reinforcement so sampled and tested which fails to comply with the
specifications shall be rejected and the whole batch shall be removed
from the site immediately. The contractor shall have no claim for bars
mutilated in obtaining test samples.

7.4.0 Sampling

Sampling shall be done in accordance with relevant IS codes. For every
40 tonnes of steel at least one test shall be done.

CRS reinforcing bars shall conform to the physical properties of IS:1786. In
addition when tested for corrosion reistance as per the standard ASTM
method such as salt spray test (B.117.90), Potentio Dynamic Polaristion
measurement test (G.5.78), Atmospheric Corrosion test (G.50.76) and
Sulphur-di-oxide chamber test (G.87.84) shall exhibit corrosion resistance
index of minimum 1.5.CRS (deformed) bars should either be butt or lap
welded as per recommended practice of IS:9417. For best results basic
coated electrodes containing copper and/or nickel shall be used.
The chemistry of CRS should be as given below :

Carbon                   -0.15% max
Sulphur(S)               -0.05% max
Phosphorus (P)           -0.12% max
S+P                      -0.17 % max
Silicon                  -0.45 % max
Corrosion
Resistant elements       -1.5 % max

7.5.0 Binding Wire :

The reinforcement shall be securely bound wherever bars intersect or
wherever required with 18 gauge (1.22 mm) annealed steel wire
conforming to IS:280.

7.6.0 Chairs :
Adequate no. Of chairs shall be provided           to prevent sagging of
reinforcement during concreting.

7.7.0 Mechanical splices :

Mechanical connections for spilicing reinforcement bars in congested
locations shall be used only with the approval of consultant/Engineer-in-
charge. Patented couplers as manufactured by Usha Martin Industries Ltd.
(CCL bar grips) and BBR India Ltd.(BBR SWIF) shall be used wherever
mentioned in the drawings. The couplers shall be attached to the
reinforcement bars by forging, hydraulic pressing or screw couplers in
special circumstances may be permitted. All operations relating to
reinforcement coupling shall be done using supplier’s patented machine
/ equipment and in the presence of the supplier’s representative. The
contractor shall     submit relevant trade literature, mil certificates,
certificate of origin and letters of approval for each proposed
application. A sample of each type of mechanical coupler shall be
submitted for testing and approval prior to the use of any coupler in the
works.

7.8.0 Welding electrodes :

Electrodes used for welding of steel bars shall be orginary mild steel grade
2 electrodes conforming to IS:814 and shall be the best quality and
approved by the Engineer-in-charge. The work shall be carried out strictly
as per IS:2751 and IS:9417.
7.9.0 Causes of Rejection :

Steel reinforcement, not conforming to relevant specification, shall be
rejected by the client/consultant. Every bar shall be inspected before
assembling on the work and defective, brittle or burnt bar shall be
rejected. Cracked ends of bars shall be discarded. The contractor at his
own expense shall immediately remove rejected steel from the work site.

7.10.0 Storage :

Steel reinforcement shall be handled and stored in a manner that
bending or distortion of the bars is avoided and corrosion of steel is
prevented. They shall be stored in such a manner that they are not in
direct contact with the ground (at least 150 mm clear above ground). In
case of long storage, a coat of cement wash shall be given to the
reinforcing steel to prevent any scalling or rusting. Any reinforcement,
which is certified as corroded by the Engineer-in-charge, shall either be
immediately withdrawn from site or stand blasted and coated with
cement slurry. No extra payment shall be amde for sand blasting and
cement coating. Bars of different classifications and size shall be stored
separately. Generally, storage of reinforcements shall be in accordance
with clause 3.7 of IS:4032.

8.0.0 WATER :

Water used for various works shall conform to IS:456.

8.1.0 General Requirements :

Water used for both mixing and curring of concrete/brickwork/plaster as
well as for washing aggregate shall be potable and free from injuruous
amounts of deleterious materials like alkalis, acids, oils salts, sugar, organic
materials, vegetable growth or other substances which are likely to affect
the strength or durability of concrete and other construction materials.
Before starting any concreting/brickwork/ plaster work and wherever the
source of water changes, the water shall be tested for its acceptability for
use in concrete etc. by the mehtods given in IS:3025. No water shall be
used until tested and found statisfactory and cost of all such tests shall be
borne by the contractor.

Hard and bitter water shall generally be found unsuitable for curing mortar
and concrete.
Water for use in mixing with cement shall neither be hotter than 25°C nor
colder than 5 °C at the time of mixing.

Whenever temperature controlled concrete is specified, the contractor
may establish an ice making plant of required capacity at site.

Water used for curring shall not produce any objectionale stain or
unsightly deposit on the surface. It shall be free of elements that
significantly affect the hydration reaction. Presence of tannic acid or iron
compounds in water is objectionable.

Acceptance Criteria :

Water to be used, shall satisfy the following :

8.2.1 To neutralise 200 ml sample of water, using phenobhihalein as an
indicator, it shoudl be require more than 2 ml of 0.1 normal NaOH.

To neutralise 200 ml sample of water, using methyl orange as an indicator,
it should nto require more than 10 ml of 0.1 normal HCL

8.2.3 IT should not contain soilids by wieght in excess of the following :

Organic          200 mg/litre
Inorganic        3000 mg/litre
Sulphates        500 mg/litre
Chlorides        1000mg/litre for RC work and
                 2000 mg/litre for other works
Suspended Matter 2000 mg/litre

The pH value of water shall be between 6 and 8.


If required by the Engineer-in-charge it shall be tested by comparison with
distilled water. Comparison shall be made by means of standard cement
tests for soundness, time of setting and mortar strength as specified in
IS:269. Any indication of change in time of setting by 30 minutes or more or
decrease of more than 10% in strength of mortar prepared with water
sample when compared with the results obtained with mortar prepared
with distilled water shall be sufficient cause for rejection of water under
test.

8.3.0 Sample for Testing :
The sample of water taken for testing shall represent the water proposed
to be used, with due account being paid to seasonal variation. The
samples shall not receive any treatment before testing other than that
envisaged in the regular supply of water proposed for use. The sample
shall be stored in a clean container. Test shall be carried out only once for
one particular source.

      Testing shall be done as per IS:3025 (Relevant parts).

8.4.0 Storage :

      Storage of water shall generally conform to IS:4082, whenever
water is to be storted for construction purposes. Water storage tanks shall
be covered to the satisfaction of the Engineer-in-charge to prevent
contamination.

9.0.0 ADMIXTURES

Admixtures shall be used in concrete, mortar plaster etc. as specified in
the schedule of items and/or drawing only after the product is approved
by the client/consultant. The contractor is bound to furnish all such
information like dosage, method of application, chloride content, etc.
required to decide on the suitability of the admixture. All required tests
should be carried out at the instructions of the client at no extra cost.

      Use of admixture being a specialised job, shall be carried out strictly
as per manufacturer’s recommendaitons.

9.1.0 General Requirements :

       Admixtures used shall conform to the following relevant IS codes
and shall be purchased from reputed manufacturers as approved by
cielnt/consultant. In reinforced concrete, the chloride ion of any
admixture used shall not exceed 2% by weight of the admixture as
determined in accordance with IS:6925 and the total chloride ion in all
admixtures used in concrete mi shall not exceed 0.83% by weight of
cement. The addition of calcium chloride to concrete containing
embedded metal will not be prermitted under anyc ircumstances.

Accelerating Admixtures conforming to IS:9103 & 2645. It shall be in liquid
state with a specific gravity of 1.3 and complying with ASTM C-494 type E.
It shall accelerate the setting and hardening of the concrete mix thereby
achieving high early ago strength. It shall be from CICO or equivalent and
used at the rate instructed by the manufacturer. It should be compatible
with all types of cement.

Retarding Admixtures conforming to IS:9103. It shall be in liquid state with a
specific gravity of 1.22 and complying with ASTM C-494 type B&D, CRD-
C87 type B & D, BS:5075 part 1. It shall be added to the concrete mix
during the mixing process along with water and aggregates. No extension
of normal mixing time is necessary. It shall delay the initial and final setting
time. It shall help to spread the heat of hydration over a longer period of
time. It shall give a highly workable concrete with a low W/C ratio. It shall
be from CICO, Feb Roffe or equivalent and be used at the rate instructed
by the manufacturer, with cement, depending on the amount of
acceleration of hardening required. It should be compatible with all types
of cement.

Air-entraining Admixtures conforming to IS:9103.

Water-reducing admixtures conforming to IS:9103. Only naphthalene
based water-reducing admixture/plasticizers shall be permitted.

Integral waterproofing admixtures conforming to IS:2645. It shall be from
Feb Roffe’s Roff Hyseal, Roff Hyproof, Algiproof or equivalent. It shall be
used as an excellent cement admixture in all types of concrete/ plaster
mortars, pointing mortars, masonry works, guniting works and pressure
grouting works. It shall improve resistance of the surface to weathering
and chemical attacks. It shall be no-toxic so as to use for waterproofing in
water tanks, reservoirs, tanks, etc..

9.2.0 Product information :

5.2.1 The contractor shall further provide the following information
concerning each admixture to the cielnt/consultant.

a. Optimum dosage and detrimental effects of under-dosage and over-
   dosage.
b. Chemical names of the main ingredients in the admixture.
c. The chloride ion content expressed as percentage by weight of
   admixture.
d. Whether or not the admixture leads to entrapment of air when used in
   the manufacturer’s recommended dosage and if so, to what extent.

Where two or more admixtures are proposed to be used in any one mix,
the manufacturer’s written confirmation of their compatibility.
There would be no increase in risk of corrosion of the reinfo4rcement or
other embodiments as a result of using the admixture.

9.3.0 Sampling :

9.3.1 Sampling for testing shall be done in accordance with clause 4.1 of
IS:9103 for liquid admixtures and clause 4.2 of IS:9103 for non-liquid
admixtures.

9.3.2 samples shall be packed in moisture-proof airtight containers.

9.3.3 Sampling of integral waterproofing compound shall be done as
given in IS:2645.

9.4.0 Testing :
For checking the physical properties of any admixture, tests shall be
carried out as detailed in clause 3 of IS:9103. Results shall conform to the
requirements given in Table 1 of IS:9103.

For air entraining admixture, tests shall be carried out as agreed to
between the client/consultant. And the manufacturer. Except where
resistance to freezing and thawing and to disruptive action of de-icing
salts is necessary, the air content of freshly mixed concrete in accordance
with the pressure method given in IS:1199 shall not be more than 2% higher
than that of the corresponding control mix and in any case not more than
3% of the test mix.

For integral waterproofing compound, tests shall be carried out as per
methods given in IS:2645.

Uniformity tests on the admixture are essential to compare qualitatively
the composition of different samples taken from batch to batch or from
the same batch at different times.

All tests relating to concrete and admixture shall be conducted
periodically at an independent laboratory and compared with the data
given by the manufacturer.

9.5.0 Storage :

9.5.1 Admixtures shall be stored in moisture-proof, airtight containers.

9.5.2 Storage shall in general conform to IS:4082.
10.0.0 FORMWORK

10.1   General requirements :

10.1.1 Shuttering for concrete work below ground level shall be of wrought
formwork and that for concrete work in superstructure shall be of fine
formwork.

10.1.2 Formwork shall be of Marine Plywood of minimum 12 mm thickness
or steel capable of resisting damage to the contact faces under normal
conditions of erecting forms, fixing steel and placing concrete. For
designated areas prominently in public view the choice of material shall
be decided by the Engineer-in-charge.


Where plywood is used, it shall be of best quality, resin bonded and
waterproof. Formwork shall be minimum 12mm thick shuttering quality
plywood conforming to IS:4990 aand of make approved by the Engineer-
in-charge. Suitable stiffeners and walers shall be provided depending on
the shuttering design. It shall be stable and not liable to srap when
exposed to sun and rain or wetted during concretting.

Where steel framework is used, it shall be made out of appropriate gauge
steel sheets/section with proper framework to ensure perfect surfaces. It
shall be made of 3 mm thick black sheets stiffened with angle iron
framme. The surface that would come in contact with concrete shall be
thoroughly cleaned and either soap solution or raw linseed oil shall be
applied.

NOTE : TIMBER SHUTTERING IS NOT ALLOWED

10.1.3 The forms shall be true to dimensions and sizes. The props sused on
the work shall be of such type, which can afford finer adjustments for
levels, etc. and ensure fully stability.

10.1.4 Wherever applicable, selection of plywood shuttering for formwork
shall be made based on the following relevant standards :

Specification for ballies for general purposes as IS:3337. Specification for
plywood for concrete shuttering work as per IS:4990.

11.0   BRICKS FOR MASONRY :

11.1.1 General requirements :
a. Bricks for masonry in foundations, walls and other locations shall be
   hand or machine moulded and made from suitable soil and kiln burnt.
   They shall have regualr and uniform size and colour, sharp straight and
   right angled edges and deep cherry red and copper colour, uniformity
   well burnt throughout but not over-burnt. They shall have smooth
   rectangular faces with parallel sides and sharp corners. Generally,
   they shall conform to IS:1077.
b. They shall be free from cracks, flaws and nodules of free lime.
c. They shall be moulded with a frog of 100 x40mm and 10mm to 20mm
   deep on one of its flat sides.

d)    They shall give a clear metallic ringing sound when struck by a
      mallet and shall not break when dropped on the ground on their
      flat face in a saturated condition from a height of 600 mm.

e)    They shall show a fine-grained, uniform, homogeneous and dense
      texture on fracture and shall be free from lumps of lime, lamination,
      cracks, air holes, soluble salts causing efflorescence or any other
      defect which may impair their strength, durability, appearance and
      usefulness for the purpose intended. They shall not have any part
      under-burnt.

f)    The size of the conventional bricks shall be 225 x 110 x 75 mm. Only
      bricks of one standard size shall be used in one work unless specially
      permitted by the Client / Consultant. The following tolerances are
      permitted in the standard conventional size adopted on the
      particular work.
                         Length plus or minus 3.0 mm
                         Breadth plus or minus 1.5 mm
                         Depth plus or minus 1.5 mm

      The size of the modular bricks shall be 190 x 90 x 90 mm or 190 x 40
      mm.

g)    The crushing strength of the brick to be used in all types of works
      shall not be less than 75kg/sq.cm unless otherwise specified when
      tested according to IS:3495 (Part-1).

h)    After immersion in cold water for 24 hours, absorption by weight
      shall not exceed 15 percent of the dry weight of the brick when
      tested according to IS:3495 (Part-2).
i)    Efflorescence in bricks shall be within limits prescribed in (Not more
      than 10% of the exposed area of the brick shall be covered with a
      thin deposit of salts) IS:3495 (Part-3).

NOTE : PAYMENT TO BE MADE ON ACTUAL EXECUTED VOLUME OF BRICK
     WORK AT SITE.

11.1.2 First Class Bricks for Exposed Brick work:

      First class bricks are those, which strictly conform to the standard size
      of modular bricks and such that ten layers of brick laid in mortar
      shall form masonry of 1 m height.                These bricks shall be
      manufactured from good quality plastic earth, which is free from
      saline deposits. They shall have straight edges and even surfaces.
      When immersed in water for an hour they shall not absorb water
      more than 1/6th of their weight. On drying they shall not show any
      sign of efflorescence.

11.1.3 Storage of Bricks:

A)    Brick shall not be dumped at site. They shall be stacked in regular
      tiers of height not exceeding 1.5m.

B)    Bricks of different types and classifications shall be stacked
      separately. Generally, stacking of bricks shall conform to IS:4082.

11.1.4 Handling:

      Bricks shall be unloaded by hand and carefully stacked. These shall
      not be thrown to the ground to avoid any damage.

11.1.5 Sampling and Inspection:

      Representative samples shall be submitted by the Contractor and
      approved samples shall be retained by the Client / Consultant for
      comparison and future reference.

      All bricks shall be inspected at site and shall be subjected to the
      approval of the Consultant who may reject such consignments as
      are considered by him to be inferior to the quality specified.

      The contractor shall provide all labour and plant required for the
      inspection and conduct of such tests as shall be required by the
      Consultant without additional charges.
      Efflorescence test shall be carried out for a sample of 20 bricks from
      a stock of 20,000 bricks. Water absorption test shall be done for 32
      bricks out of a stock of 35,000 bricks. Compressive strength test shall
      be done on 50 bricks from a stock of 1,00,000 bricks.

11.1.6 Storage:

      Same as that of ‘Coarse aggregate’.

12.0.0 SAND

12.1.0 SAND FOR MASONRY MORTAR & OTHER WORKS:

12.1.1 General Requirements:

A)    All the requirements, except particle size grading stated in the
      section ‘Fine aggregates’ shall apply to this sand also. The sand
      shall consist of natural sand, crushed stone sand or crushed gravel
      sand or a combination of any of these.

B)    The particle size grading of sand in mortar for unreinforced masonry
      work shall be within limits specified below, as per IS:2116.


                  I.S Sieve            Percentage by
                  Designation IS:460   weight Passing I.S
                  (Part-1)             Sieve
                         4.75 mm              100
                         2.36 mm             90-100
                         1.18 mm             70-100
                       600 micron            40-100
                       300 micron             5-70
                       150 micron             0-15

C)    Clay, fine silt & fine dust in natural sand, crushed gravel or stone
      sand shall not be exceed 5% by mass when determined in
      accordance with IS:2386 (Part-2).

12.1.2 Sampling and Testing:

A)    The method of sampling shall be in accordance with IS:2430.
      Any test which the Client / Consultant finds it necessary to be done
      on sand shall be carried out in accordance with relevant parts of
      IS:2386. If further confirmation as to the satisfactory nature of the
      material is required, compressive strength test on cement mortar
      cube (1:6) shall be carried out in accordance with IS:2250 using the
      supplied material in place of standard sand and the strength value
      so obtained shall be compared with that of another mortar cube
      made with a sand of acceptable and comparable quality.

      Storage:

      Same as that of ‘Fine Aggregate’.

12.2.0 SAND FOR PLASTER:

12.2.1 General Requirements:

A)    Sand used for external, internal wall surfaces and ceiling plaster
      shall conform to IS:1542 and shall be procured from approved
      sources.

B)    Unless otherwise specified, sand for plaster shall imply natural river
      sand.

C)    The sand shall be hard, strong, dense, durable, clean and free from
      veins, adherent coatings and shall not contain deleterious materials
      such as iron pyrites, coal, lignite, mica, silt, clay, alkali, sea shell,
      organic impurities, loam or any other harmful materials in such
      quantities so as to adversely affect the strength or durability of
      plaster.

D)    Presence of clay, fine silt and fine dust in sand shall not be more
      than 4$ by weight as stated in clause 3.0 or IS:1542. Organic
      impurities shall also be within limits as per Table 1.0 or IS:383.

12.2.2 Grading

A)    The grading of sand for internal wall and ceiling plaster shall be
      within limits specified in the following Table of IS:1542.

     REQUIREMENTS OF GRADING FOR SANDS FOR INTERNAL WALL AND
                         CEILING PLASTER
                Percentage By Weight Passing IS Sieve
         IS Sieve              Class-A                  Class-B
     Designation (As
       per IS:460)
            240        { 98-100 for under        98-100 for under
                       coats                     coats
                       {    100 for finishing    100 for finishing
                       coats                     coats
          120          { 80-95 for under coats   80-100 for under
                       { 95-100 for finishing    coats
           60          coats                     95-100 for finishing
           30            30-85                   coats
           15            5-50                    30-95
                         0-10                    5-65
                                                 0-15


B)   The grading of sand for external plaster coat and renderings shall
     be within the limits specified in Table B.



             REQUIREMENTS FOR GRADING FOR SAND FOR
               EXTERNAL PLASTERING AND RENDERINGS.
                Percentage By Weight Passing IS Sieve
                IS Sieve         Class-A         Class-B
              Designation
             (As per IS:460)
                   480             100             100
                   240           90-100           90-100
                   120           70-100           70-100
                   60             40-85           40-95
                   30              5-50           10-65
                   15              0-10            0-15


     Class A sand shall be used generally for plaster work but where they
     are not available, Class B sand may be used after getting the
     approval from Client / Consultant.

     Deviation of about 5% from the specified limits in the grading for
     fractions passing IS Sieve 120 and 60 only may be allowed subject
     to agreement between the Client / Consultant and the supplier.
      Any other deviation shall be left to the discretion of the Client /
      Consultant.

12.2.3 Sampling and Testing:

      Same as that for masonry mortar.

12.2.4 Storage:

      Same as that of ‘Fine aggregate’.

13.0.0 STONES

13.1.0 STONES FOR MASONRY :

13.1.1 General requirements :

Generally, the stone to be used shall conform to the requirements of
IS:1597 (Part-1) and shall be of specified variety such as Granite, Trap
stone, Quartz, sandstone or any other type locally available good hard
stones.

Stones used shall be strong, sound durable, dense, compact, close
grained, homogeneous, fire resistant and fee from cracks, flaws or
defects, segregation, seams, weathered portions and other structural
defects or imperfections tending to affect their soundness and strength
and shall be procured from quarries approved by the consultant.

Stones used shall be small enough to be lifted and placed by hand. The
length of stone shall not exceed three times the height and the breadth
on the base shall not be grater than 3/4” of the thickness of wall not less
than 150mm. The height of stone may be upto 300mm.

Stones shall be free from rounded, worn or weathered surfaces or skin or
coating which prevents the adherence of mortars.

Stones to be used as headers, quoins, copings, etc. shall comply with the
requirements of facing and haearting as may be relevant.

Stones shall be non-porous and when tested in accordance with IS:1124
shall show less than 5% water absorption of its dry weight when soaked in
water for 24 hours.
Dressed and worked stones shall strictly follow the recommended
dimensions given in Table 1 of : IS:1127 depending on the purpose of work.

For specific use (e.e exposure to chemical fume, fire hazard etc.) type of
stone shall strictly conform to the recommendations of Table 2 of IS:1597
(Part 1) or as directed by the Client/Consultant.

13.1.2 Quoin Stone or Corner Stone :

For random rubble masonry (uncoursed and brought to course), quoin
stone shall not be less than 0.03 m3 in volume.

For squared rubble (coursed) masonry, the height of the quoin shall be
same as the course height and shall not be less than 450mm in any
direction.

13.1.3 Hearting and Backing Stone :

For random rubble manonry (uncorsed and brought to course) the
hearting or interior filling of a warface shall consist of rubble stones not less
than 150 mm in any direction, carefully laid, hammered down to proper
position.

For squared rubble (coursed) masonry the hearting or the interior filling of
the wall shall consist of flat beded stone, carefully laid on their proper
bedsin mortar.

13.1.4 Through stone or Bond Stone :

One through stone shall be provided for every half a square metre of
facing, evenly distributed in a staggared pattern.

They shall have baout 0.03 sqm in face area and shall have a tailing for
the full width of the masonry when the width of masonry is 600 mm or less.

If the masonry wall is over 600 mm thick, a line of headers overlapping
each other by atleast 150mm shall be laid right through the wall from the
face to the back.

Thelength of the interior headers shall not be less than 450mm and their
average cross sectional area shall not be less than 0.025 sqm.

Bond stone shall be distincltly marked on its face during construction for
subsequent verification.
13.1.5 Sampling :

Sampling of stones including quoins and headers to be used in the work
shall be got approved by the Client/Consultant before the work is started
and such samples shall be maintained in the site engineer’s office for any
subsequent inspection.

13.1.6 Testing :

For compressive strength, test pieces shall be made from selected
samples in cubical or cylindrical shape. The diameter or lateral dimension
of a test sample shall not be less than 50mm and the ratio ofheight to
diameter or height to lateral dimension shall be 1:2. Compressive strength
andtransverse strength test (if required) on stone samples shall be carried
out in the manner specified in IS:1121.

Water absorption test shall be carried out, if directed by the consultant, as
per IS:1124.

Tests for durability and weathering shall be done, if directed by the
consultant, as per IS:1126 and IS:1125 respectively.

The working of stones to the required sizes and their dressing shal be
carried out as per IS:1127 and IS:1129.

14. PLASTERING

14.1 PREPARATION OF SURFACE:

The following surface preparation shall be made for both single and
double coat plasters. The surface shall then be thoroughly washed with
water, cleaned and kept wet before plastering is commenced.

In case of concrete the surface shall be chipped by chiselling and wire
brushing, cleaning the surface and erecting scaffolding it required.

14.2 CEMENT PLASTER (SINGLE COAT)

APPLICATION:

Plastering in cement mortar (1:4) shall be started from the top and worked
down towards the floor. All holes shall be properly filled in advance of the
plastering as the scaffolding is being taken down. To ensure even
thickness and a true surface, plaster of about 15 x 15cm shall be first
applied horizontally and vertically, at 3 metres intervals over the entire
surface to serve as gauges. The surfaces of these gauged areas shall be
truly in the plane of the finished plaster surface. The mortar shall then be
laid on the wall, between the gauges with trowel. The mortar shall be
applied in a uniform manner slightly more than the specified thickness and
brought to true surface by working a wooden straight edge reaching
across the gauges with small upward and sideways movements at a time.

All corners, arises, angles and junctions shall be truly vertical or horizontal
as the case may be and shall be carefully finished. Rounding or
chamfering corners, arises, junctions, etc.where required shall be done
without any extra payment. Such rounding or chamfering shall be carried
out with proper templates to the sizes required.

Horizontal joints in plaster shall not occur on parapet tops and copings as
these invariably lead to leakages. Good quality lime neroo shall be
applied to plastered surface with steel trowel to a thickness slightly more
than specified and rubbned down to give overall thickness of 12mm and
polished to a perfectly smooth and even finish working from top to
bottom.

Curing shall be commenced as soon as the plaster has hardened
sufficiently. This shall be done by spraying water at regular intervals.

14.3 CEMENT PLASTER (TWO COAT WORK):

The plaster shall be applied in two coats as detailed below:

-   Apply 20mm thick coat of CM 1:4 mixed with CICO / ACCO Proof
    water proofing compound mixed as per manufaturer’s specifications
    as 1st cost leaving the surface rough.

When the plaster has been brought to true surface with a wooden straight
edge the surface shall be left rough with 2mm deep furrows shall be
made with a scratching tool to form key for the finishing coat. The surface
shall be kept wet till the finishing coat is applied.

Apply 2nd coat of 8mm thick of CM 1:4 and finishing the surface by
rubbing with sponge till uniform texture is obtained.

The finishing coat shall be applied after the undercoat has sufficiently set
but not dried and in any case within 48 hours of laying the first coat.
15.0.0 STRUCTURAL STEEL :

All material shall be new and shall conform to their respective
specifications. The use of equivalent or higher grade or alternative
materials will be considered only in very special cases subject to the
approval of Client/Consultant.

15.1.0 General requirements :

All structural steel sections shall conform to IS:2062 unless otherwise
specified and shall be clearly rolled to proper dimensions and weight
subject to permissible tolerances as per IS:1852.

The finished materials shall be free from cracks, surface flaws, laminations
rough or imperfect edges and all other harmfull defects and shall have a
smooth finish. The material shall be free from loose mill scale, rust pits or
other defects affecting the strength and durability.

Structural steel work shall be painted by applying two coats of red oxide
primer conforming to relevant IS code and 2 coats of synthetic enamel
paint (Conforming to IS:2933) or aluminium paint (conforming to IS:2339).
However, steel shall be galvanised, if so required by the Client/Consultant.

Normal hexagonal nuts and bolts shall conform to IS:3138-1966. High
strength structural bolts shall conform to IS:3757. Countersunk bolts shall
conform to eighr IS:8352 or IS:8353 depending on the type of bolt. Black
bolts, nuts and screws shall be in accordance with IS:1363 for Black
hexagonal with nuts of 6 to 39mm and black hexagon screw of 6 to 24mm
and IS:1364 and IS:1367 for other sizes.

Hot rolled rivet bars shall conform to IS:1148 and high tensile steel rivet bars
for structural purposes shall conform to IS:1149.

Welding electrodes shall conform to IS:814 and approval of welding
procedure shall be as per IS:823.

Node connectors for space frame shall be Octogonal or Spherical in
shape. It shall a minimum tensile strength as specified in the Bills of
Quantities. Minimum elogation shall be 7% and hardness 170-240 BHN. The
nodes machined out of solid bars shall conform to IS:2062 and the casing
shall be as per IS:1030.

The following variety of steel shall be used for structural purposes :
ST-42S: It shall be used for all types of structures (riverted and bolted)
including those subjected to dynamic loading and where fatigue, wide
fluctuations of stresses, reversal of stresses and great restraint are involved.
It shall be suitable for welded structures provided that the thickness of the
material does not exceed 20mm.

ST-42W : Fusion welding quality steel, conforming to IS:2062 shall be used
for structures subject to dynamic loading where welding is employed for
fabrication and where fatigue, wide fluctuation of stresses, reversal of
stresses and great restraints are involeved.

Structural steel tubes (ERW) used for building construction shall be hot
finished tubes conforming to IS:1161/IS:1239/IS:806. tubes shall be
designated by their nominal bore and shall be classified as light, medium
and heavy as per IS:1161. tubes of thickenss lower than light tubes shall
not be permitted.

Unless mentioned otherwise, fusion welding quality steel ST-42w shall be
used for all the structural steel works and tubes shall be YST 21 conforming
to IS:806.

The chemical and mechanical properties for structural steel shall be as
stated below :



                          CHEMICAL COMPOSITION OF STEEL

 Steel designation    Maximum percentage
                      Corbon          Sulphar                     Phosphorous
 ST-42W                      0.23            0.06                       0.06
 ST-42S                   0.25/0.28          0.06                       0.06
 ST-42O                                                                 0.07




                          MECHANICAL PROPERTIES OF STEEL
 Steel        Class of Steel        Nominal           Tensile    Yield stress min. kg/mm2   %e
 Type         Product               thickness / dia   strength
                                    mm                kg/mm2
 ST-42-W      Plate sections (For   Below 6 mm only
 (Fusion      example, angles,      bend test shall
 welding      tees, beams,          be required.
 quality      channels etc..)       6 mm and upto
              And flats             20 mm Over 20     42 to 54   26                         23
 &
                                    upto 40 mm
                                    Over 40 mm        42 to 54   24                         23

                                                      42 to 54   23                         23



 ST-42-S
 (Standar
 d quality)
              Bars (round,        Below 10 only
              square and          bend test shall
              Hexagonal)          be required.
                                  Over 10 mm          42 to 54   26                         23
                                  upto 20 mm
                                  Over 20 mm          42 to 54   24                         23
 ST-42-O      Plate sections (for Below 6 only
 (Ordinar     example angles, bend test shall
 y            tees, beams,        be required.
 quality)     channels, etc.)
              and flats           6mm and             42 to 54   26                         23
                                  above

              Bars (round,          Below 10mm
              square and            only bend test
              Hexagonal)            shall be
                                    required.
                                    10 mm and         42 to 54   26                         23
                                    above

15.2.0 Test certificate :

7.2.1 When the steel is supplied by the Contractor, test certificate of the
manufacturerer shall be obtained according to IS:2062 and other relevant
Indian Standards. Notwithstanding the manufacturer’s certificates, the
Consultant/architect may ask for testing of material in approved test
laboratory. The test results shall satisfy the requirements of the relevant
Indian Standards. Whenever quality certificates are missing or incomplete
or where material quality differs forom standard specifications, the
Contractor shall conduct all appropriate tests as directed by the
consultant/architect at his own cost. Materials for which test certificates
are not available or for which test results do not comply with relevant IS
standard shall not be used.

15.3.0 Storage :

       Storage of structural steel shall be as per IS:4082. Steel materials
supplied by contractor shall be marked for identification and each lot
shall be accompanied by manufacturer’s quality certificate, conforming
to chemical and emchanical characterists as per relevant IS codes. All
steel furnished by suppliers shall be checked, sorted out, straightened and
arranged by grade and quantities in stores.

Welding wire and electrodes shall be stored separately by qualities and
lots inside a dry and enclosed room in compliance with IS:816 and as
directed by Engineer-in-charge. Each lot of electrode, bolts nuts, etc. shall
be accompanied by manufacturer’s test certificate.

16.0 ANTI TERMITE TREATMENT :-
16.1 SCOPE
The scope of job is to form a chemically treated soil barrier to prevent
growth of nests or colonies of the sub terrianian termites.
16.2 MATERIALS :
The following chemical (as specified) in water emulsion shall be used :


             Chemicals                Concentration (by weight)
             Chloropyrifos                1.0%


16.3 PRE-CONSTRUCTION CHEMICAL TREATMENT :


Hand operated pressure pumps shall be used for uniform spraying and
proper check shall be maintained to ensure that specified quantity of
chemical is used for the required area.

16.4 TIME OF APPLICATION
Anti-termite treatment shall start in foundation trenches and pits before
laying the leveling course of PCC. The PCC shall be done only after the
chemical emulsion has been obsorbed by the soil and surface is quite dry.
Treatment should not be carried out when it is raining or the soil is wet. The
treated soil barriers shall not be disturbed after they are formed and if by
chance, they are disturbed, the same shall be made good before laying
the PCC.


16.5 PROCEDURE :


Treatment of Column Pits, Wall Trenches and Basement Excavation :-
The bottom surface and sides (upto 300mm) shall be treated with
chemical at the rate of 5 litres/sq.M
The portion of the column foundations and the retaining walls coming in
contact with the backfill, the structure shall be treated at the rate of 15
litres/sq.M of the vertical surface. If water is used for ramming the earth fill
then treatment shall be carried out after the ramming operation is
completed by rodding the earth at 150mm c/c close to the structure
surface and spraying the required quantity of chemical. For RCC framed
structures using 1:2:4 or richer concrete the treatment shall start from a
depth of 500 mm below ground level and there is no need to start the
treatment from the bottom of excavation for columns and plinth beams.
The earth from 500mm below the ground level and above shall be
treated as described in previous paragraph. However, for RCC frame
structure, there shall be no chemical treatment for column foundations.
Treatment of top Surface of Plinth Filling :-
The top surface of filled earth within plinth walls shall be treated with
chemical emulsion at the rate of 5 litres/sq. M before the subgrade of floor
is laid. Holes upto 50-70mm deep at 150mm centres shall be made to
facilitate saturation of the soil with chemical emulsion.
Treatment of Junction of Wall and Floor :-
To achieve continuity of vertical chemical barrier on inner wall surfaces,
small channels of 30 x 30mm shall be made at all the junctions before
laying the subgrade and rod holes shall be made upto ground level at
150mm centres and chemical emulsion shall be poured at 15 litres/sq. M
of the vertical surface.
Treatment of soil along external perimeter of Buildings :-
After the building is complete, rod holes shall be made along external
perlmeter at 150 mm centres and 300mm deep and these holes shall be
filled with chemical emulsion at 5 litres/running metre of perimeter.


16.6 RECORD OF CHEMICAL USED :
A detail record of quantity of chemical used for each operation shall be
kept at site duly approved by Engg.-in-Charge/Architects.


16.7 GUARANTEE
The contractor shall give a guarantee of 10 years for effective anti-termite
treatment barrier.


16.8 MEASUREMENT :
The measurement shall be made in square metres on the basis of the
plinth area of the building at plinth level only for all operations described
above . Nothing extra shall be measured.

17.0.0 Tiles :

17.1.0 Terrazzo Tiles :

Terrazzo tiles shall generally conform to the standards prescribed in IS:1237
in all respects.

17.1.1 General requirements :

a. All tiles to be used shall be heavy duty flooring tiles only, conforming to
   clause 3 of IS:1237.
b. Tiles shall be manufactured from cement, natural aggregate and
   colouring pigment (where required) as specified in clause 4 of IS:1237,
   under hydraulic pressure not less than 140 kg/sqcm and shall be given
   the first griding with machine before delivery to site.
c. Manufacturing process of tiles shall conform to the requirement given
   in clause 5 of IS;1237.
d. Unless otherwise stated, the size of terrazzo flooring tiles shall be as
   follows :
 Length (mm)                  Breadth (mm)                 Thickness (mm)
 200                          200                          20
 250                          250                          22
 300                          300                          25

However, special shapes and sizes of tiles can be asked for by the client.
In such as case, the manufacturer/supplier shall ensure to supply the tiels
only int he specified shape and size.

e.     Tolerances on length or breadth of tiles shall be +/- 1 mm. In
addition, the difference in length of side between the longest side and
shorter side in the sample shall not exceed 1mm. Tolerance on thickness
shall be +/- 5 mm. In addition, the difference in thickness between the
thickest and the thinnest tile in the sample shall not exceed 3 mm.

f. The minimum thickness of wearing layer for the various classes of terrazzo
flooring tiles shall be as specified in Table 1 to IS:1237. Unless otherwise
specified, the tiles shall be supplied with intial grinding and grouting of the
wearing layer.

g. The wearing layer of the tiles shall be free from projections, depressions,
cracks, holes, cavities and other blemishes.

17.1.2 Physical requirements :

The tests on tiles to check physical requirements shall not be carried out
ealrier than 28 days from the date of manufacture.

a. Client can ask for any physical test to verify the acceptability of the
   tiles. All physical tests shall be carried out as per Appendex A to F of
   IS:1237 as applicable, depending on the tests to be done.
b. On testing, the physical requriements shall conform to the
   acceptability limits specified in clause 11 of IS:1237. Tiles, failing to meet
   acceptability criteria, shall be rejected.

17.1.3 Sampling :

Sampling and inspection shall be carried out as per clause 14 of IS;1237.

17.1.4 Marking :
All tiles shall be legibly marked on the back with the name of the
manufacturer or his trade mark. Heavy duty tiles shall be marked ‘H’

17.2.0 Ceramic Tiles :

Ceramic tiles to be used for flooring and dadoing shall conform to
IS:13712. These shall be procured from approved maufacturers and a few
approved samples shall be submitted to Client/Consultant/architect for
future reference.

17.2.1 General requirements :

The tiles shall be of vitreous ware and shall be free from deleterious,
substances. The finished tile, when fractured shall appear fine grained in
texture, dense and hemogeneous. The tiles shall be sound, true to shape ,
flat, free from flaws and other manufacturing defects affecting their utility.

Glazed ceramic tiles : Glazed ceramic tiles shall be highly pressed, single
fired, red body, top glazed white or coloured, plain or with designs. The
body glazed ceramic tiles should consists of high grade clay and minerals
and well pressed in hydraulic presses and glaze should be a combination
of different minerals. The top surface shall be glazed with stable
gloss/semi-gloss/matt finish of uniform colour and texture. The edges and
under side of the tiles shall be free from glaze and shall have ribs or
indentations so that these may adhere properly to the surface below.

Floor tiles : These tiles should have high strength, good resistance to wear
and tear, low water absorption and sufficient anti-skid properties and all
shall conform to IS: 13755. Based on the properties of the glaze and
hardness, floor tiles are categorized abrasion resistant-wise as group II to V.
The tiles required in building and walkway shall confirm to Group IV .

Wall tiles : These tiles shall be single fast fired having medium water
absorption and high strength characteristics. These tiles shall have high
glaze and better adhesion to wall and shall conform to IS:13753. Wall tiles
shall be glossy/semi-glossy, matt glaze finish, white or coloured, plain or
printed special printed and premium printed/designer etc..

Vitrified ceramic unpolished/polished tiles : These tiles are of different
shades having monolithic body that is pressed in very high tonnage press
and fired to high temperature. The tiles shall be homogeneous and
compact through out the entire body with very high strength, low porosity
and extreme surface hardness, high resistance to abrasion by chemicals
and shall conform to IS:4457. The tiles shall eb with smooth surface or
textured anti-skid finish surface. Polished vitrified ceramic floor tiles shall
be homogeneous heavy and tough with highly reflective polished surface
but non-slippery.



17.2.2 Sampling & Testing :

Sampling shall be done as per IS:13711 and testing shall be done as per
IS:13630. Samples of each type/design/finish/print/size/colour of tiles shall
be submitted well in advance to the Architect/consultant for approval at
the contractor’s cost. The consultant/architect shall retain approved
sample. Tiles shall be procured from a single approved source who can
provide products of consistent wquality and physical properties.

17.2.3 Storage :

The tiles shall be delivered in original containers with seals unbroken.
Adequate precaution shall be taken to prevent accidental damage to
tiles while unloading and these shall be stored under cover in manner
approved by the Engineer-in-charge.

17.2.4 Acceptance criteria :

Acceptance criteria shall be as per IS:13711.

17.3.0 Anti-skid tiles :

17.3.1 General requirements :

The tiles shall be free from any flaw, fissure, crack or any other
manufacturing defect that may adversely affect their utility. They shall be
flat, square, true to shape and sound.

Finish shall be matt finish.

Compressive strength shall not be less than 70 N/mm 2.

Maximum permissible water absorption shall be 2 percent.

Maximum permissible average wear shall be 2mm. However, for an
individual specimen this value shall be 2.5 mm.

Tiles meant for dadoing purposes shall not be used for flooring.
17.3.2 Sampling and testing :

      Same as that of ‘Ceramic tiles’.

17.3.3 Acceptance criteria :

      Same as that of ‘Ceramic tiles’.

17.4.0 Acid Resistant tiles :

17.4.1 General                           requirements                        :

The tiles shall be of viterous ware and shall be free form deleterious,
substances. The finished tile, when fractured shall appear fine grained in
texture, dense and homogeneous. The tiles shall be sound, true to shape,
flat free from flaws and other manufactureing defects affecting thier
utility.

Size of ceramic unglazed vitereous acid resistant tiles shall be as follows :

i. 100 x 100 (or) 98.5 x 98.5mm
ii. 150 x 150 (or) 148.5 x 148.5mm
iii. 200 x 200 (or) 198.5 x 198.5mm

Half tiles for use as full tiles, if manufactued, shall have dimensions that
shall be such as to make the half tiles, when jointed tother, match witht he
dimension of a full tile.

Thickness shall be 25,20,12 & 10mm.

Depth of the grooves on the underside of tiles shall not exceed 3mm.

Tolerance in length, width and thickness of tiles shall be +/-2.5 percent.

Half tiles for use as full tiles, if manufactured, shall have dimensions that
shall be such as to make the half tiles, when jointed together match witht
he dimension of a full tile.

Tolerances in length width and thickness of the tiles shall be +/- 2.5
percent. Other requirements shall be in accordance with Table-1 of
IS:4457.
17.5 MARBLE MOSAIC TILE FLOORING :


17.5.1 SCOPE :
This covers the laying and finishing of cement concrete flooring tiles in
floors, wall, staircases, etc.
17.5.2 MATERIALS :
Cement, sand, terrazo tiles shall conform to the specifications detailed in
the Materials Section.
Mixing of mortar shall be done in accordance with the specification laid
down under “Cement Mortars”.
17.5.3 LAYING :
Subgrade concrete or the RCC slab on which tiles are to be laid shall be
cleaned, wetted and mopped. The bedding of the tiles shall be with
cement mortar 1:5 or as specified. The average thickness of mortar shall
be 30mm and thickness at any place shall not be less than 10mm.
Lime mortar bedding shall be spread, tamped and corrected to proper
levels and allowed to harden for a day before the tiles are laid.
Over this bedding, neat grey cement slurry of honey like consistency shall
be spread at the rate of 4.4 kg/sq.mt over such an area that would
accommodate 20 tiles.
Before laying, the tiles shall be soaked in water for at least 20 minutes and
then allowed to dry for about 10 minutes. It is necessary to have tiles
damp but not wet when they are laid. Tiles shall be fixed by gently
tapping with a wooden mallet till they are properly bedded and in level
with the adjoining tile. The joints shall be kept as thin as possible not
exceeding 1.5 mm. Where full-size tiles cannot be fixed, tiles shall be cut to
the required size and their edges rubbed to ensure a straight and true
joint. Tiles which are fixed in the floor adjoining the wall shall enter not less
than 12mm under the plaster, skirting or dado. After the tiles have been
laid, excess cement coming out through the joints upto the surface shall
be immediately wiped clean.


17.5.4 CURING, POLISHING AND FINISHING :
The day after the tiles are laid all joints shall be cleaned of the grey
cement with a wire brush. The joints shall after 24 hours be filled with
matching cement paste and allowed to set. The same cement slurry shall
be applied to the entire surface of the tiles in a thin coat with a view to
protect the surface from abrasive damage and fill the pin holes that may
exist on the surface.


The floor shall then be kept wet and protected for a minimum period of
seven days before starting the polishing. No one shall be allowed to walk
on the floor during the first 24 hours immediately after the tiles are laid.


The surface shall thereafter be grounded evenly with machine fitted
coarse grade grit block. Water shall be used profusely during grinding. It
shall then be covered with a thin coat of cement mixed with colouring
pigment to match the topping of the wearing surface of the tile sand
second grinding shall then be carried out with machine fitted with fine
grade grit blocks.


The final grinding with machine fitted with the finest grade grit blocks shall
be carried out after 24 hours of completion of second grinding or before
handing over the floor. The entire surface shall be finally washed with
weak solution of soft soap in warm water.
For small areas or where circumstances so require, hand polishing may be
permitted as in the case of skirting, treads and risers of staircase, etc. by
the Engg.-in-charge / Architects.


MEASUREMENT :
Length and breadth dimensions shall be measured to the correct
centimetre before laying skirting, dado or wall plaster and area
calculated in square metres correct to two decimal places. No deduction
shall be made nor extra amount paid for any opening in the floor area
upto 0.5 sq.mt. No extra shall be paid for use of cut tiles nor for laying the
tiles at different levels in the same room.


17.6 TILES IN SKIRTING


17.6.1 PREPARATION OF SURFACE :
The joints of masonry shall be raked out to a depth of at least 15mm. In
case of concrete and plastered surfaces, the surface shall be roughened
by hacking. All the surfaces receiving tiles shall be cleaned thoroughly,
washed with water and kept wet before the tiling is commenced.


17.6.2 LAYING :12mm thick plaster of CM 1:3 or mixed as specified shall be
applied and allowed to harden. The plaster shall be roughened with wire
brushes making grooves of at least 2mm deep before the plaster dries.
The tiles shall be soaked in water. The tiles shall be buttered with a coat of
grey cement slurry and then shall tamped in position corrected to proper
planes and lines with a wooden mallet. The tiles shall be set in required
pattern and butt jointed with very fine joints. Top of skirting or dado shall
be truly horizontal and joints truly vertical unless specified otherwise. The
skirting or dado shall rest on the top of flooring. The projection of skirting
from the finished wall surface shall not be more than 12mm.


17.6.3 POINTING AND FINISHING
Joints shall be cleaned off grey cement grout with wire brush or trowel to
the depth of 2 to 3mm and all dust and loose mortar removed. Joints shall
then be flush pointed with white cement added with colouring pigment if
required to match the colour of the tiles. The wall shall be kept wet at
least for seven days. The finished wall shall not sound hollow when tapped
with a wooden mallet.

18.0.0 KOTA/SHAHABAD/CUDDAPAH/ GRANITE STONE :

Kotah/Shahabad/Cuddapah/Granite stone blocks / slabs/tiles to be used
for flooring, stairs, dados, skirtings, linings, veenering etc. shall conform to
the requirements specified in the schedule of items.

18.1.1 General requirements :

The natural stone slabs shall be procured from selected quality/stock as
specified in schedule of items.

These shall be hard, sound, dense and of homogeneous texture and free
form cracks, decay, weathering, soft veins and flaws.

They shall be hard and machine-cut of requisite thickness along planes
parallel to the natural bed of stone and shall be of uniform size and colour
as required.
The exposed surface of stone slabs shall be machine polished to a
smooth, even and true plane and the edges shall be chiselled to half its
depth, true and square to ensure uniform width of joint.

18.1.2 Marking :

Each type of stone blocks, slabs and tiles supplied at site shall bear the
manufacturer’s identification marks or intials.

18.1.3 Sampling and Testing :

a. Samples shall be selected and tested separately for each lot for
   determining its conformity or otherwise to the requirements of the
   specification.
b. The number of blocks/slabs/tiles to be selected for sampling shall
   depend upon the size of the lot and shall be in accordance with
   Table-2, IS:1130.
c. Contractor shall procure a certifiate from the supplier stating that the
   blocks, slabs and tiles supplied, comply with the relevant Indian
   Standards and shall submit it to Client/Consultant.
d. Tests shall be carried out as per methods described in IS:1124 and
   IS:1122, as applicable.

18.1.4 Causes for rejection :

Stone slabs not ocnforming to the size, colour, texture and other criteria
mentioned above shall be rejected by the Client/Consultant

19. Water Proofing
    All water proofing works to be carried out in this scope of work shall be
    through the approved agencies / any other reputed approved local
    agency.

Contractor will be required to submit a guarantee in respect of
performance of waterproofing for 10 years on stamp-paper. In addition to
this, an amount equal to 10% of cost of waterproofing items shall be
retained as retention money for 2 years from the date of completion,
which shall be returned only after successful completion of this period.

20.0.0 Paints
20.1.0 Enamel paint :

20.1.1 General                       requirements                        :

Paint and enamel shall be of approved quality.Colour for enamels shall
conform to IS:5. These shall always meet the requirements (colour and
space) of the cilent/consultant/architect.

These shall be pruchased from reputed manufacturers only as directed by
the client/consultant.

Under no circumstances the paint shall be diluted with linseed oil or any
other material before applciation. The mothod of application shall be as
prescribed by the manufactures.

Paint shall not show excessive setting in freshly opened can and shall
easily be mixed with paddle to a smooth homogeneous state.

While brushing, the paint shall be easily brushable possess good levelling
properties with no running or sagging tendencies.

The paint shall dry to a smooth uniform finish free from roughness,
unevenness and other imperfections.

20.1.2 Primer :

Primers shall be red oxide.

20.1.3 Packing and Marking :

Packing and marking of packages of paints, enamels & primers shall be in
accordance with IS:5661.

20.1.4 Sampling :

Representative samples of the material shall be drawn as prescribed
under 3 of IS:101 whenever directed by the Client/Consultant.

20.1.5 Storage :

Paints of all types shall be stored in a cool dry place, preferably in a
godown specifically made for the purpose. In general, storage of paints
shall be in accordance with IS:4082.
20.2.0 Plastic emulsion paint :

Plastic emulsion paint for interior and exterior use shall conform to IS:5411
(Parts-1 &2) respectively.

20.2.1 General requirements :

a. The emulsion paint and primers in general shall be of approved quality,
   colour, shade and brand as directed by the Client/Consultant.
b. The material shall consist of pigments with suitable extenders in suitable
   proportions, in a medium consisting of any stable synthetic polymer
   emulsion in water, with suitable other ingredients as may be necessary
   to produce a material so as to satisfy the requirements of IS standards.
c. The paint, for interior use, shall meet the requirements of IS:5411 (Part-
   1), on testing. The paint for exterior use shall comply witht he
   requirements of IS:5411 (Part-2).
d. Any special requirement, if agreed to between the supplier and the
   Client/Consultant, shall have to be complied with.


20.2.2 Packing and marking :

Unless otherwise specified, the material shall be packed in metal
containers lacquered inside with a suitable chemical resistant material.

Each container shall be marked in a manner as specified in clause 4 of
IS:5411 (Part-1).

20.2.3 Sampling :

Representative samples of the material shall be drawn as prescribed
under 3 of IS:101 whenever directed by the Client/Consultant.

20.2.4 Testing :

a. Tests shall be conducted according to the methods prescribed in
   IS:101, Appendices A to E of IS:5411 (Part-1) and Appendices A to F of
   IS:5411 (Part-2), as applicable.
b. Unless otherwise specified, pure chemicals and distilled water
   (conforming to IS:1070) shall be employed in tests.

20.2.5 Storage :
Paints shall be delivered in sealed containers. They shall be stored in
accordance with the provisions of IS:4082.

20.3.0 Cement paint :

20.3.1 General requirements :

Cement paint shall conform tot he requirements laid downin IS:5410.

The materail shall be in powder form, free from lumps.

When mixed with required volume of water, it shall be suitable for use on
porous surface of masonry, concrete, stucco, common brick and rough
palster work, except gypsum plaster.

20.3.2 Scaffolding :

Wherever scaffolding is necessary, it shall be erected in such a way that
as far as possible no part of scaffolding shall rest against the surface to be
white or colour washed.

A properly secured and well tied suspended paltform may also be used
for whitewashing and colour washing.

Where ladders are used, pieces of old gunny bags shall be tied at top
and bottom to prevent scratches to the walls and floors.

For whitewashing of ceilings, proper stage scafolding may be erected,
where necessary.

20.4.0 White wash, colour wash :

White washign and colour washing on concrete, masonry and plaster
surfaces in buildings shall conform to IS:6278.

20.4.1 Materials :

Following materials are used to prepare whitewash and colour wash.

Lime used for whitewashing shall be freshly burnt fat line (also classified as
class ‘C’ lime) conforming to IS:712. It shall be white in colour.
Water shall be clear, free from all organic and suspended impurities.
Water shall meet the requriements mentioned in the clause 4.3 of IS:456.
Potable water is generally considered suitable for this purpose.

Colour wash shall be done with mineral colours not affected by lime
added to white wash. No colour wash shall be done until a sample of the
colour wash to the required shade or tint has been approved by the
architect/consultant. The colour shall be of even shade over the whole
surface. If it is blotchy or otherwise badly applied, it shall be redone by the
contractor at his own cost.

Gum or glue.

Sodium chloride to be used shall conform to IS:253 or grade II of IS:797.

Ultramarine Blue or Indigo shall conform to IS:55.

Pigments :

i. Yellow and red ochre - The ochres shall conform to IS:44. The solid lump
    shall be crushed to powder.
ii. Blue vitriol - Fresh crystals of hydrous copper sulphate (blue vitriol) shall
    conform to IS:261 and shall be grounded to fine powder.

20.4.2 Scaffolding : Same as for ‘Cement Part)

20.5.0 Distemper :

20.5.1 Dry distemper :

The powdered / dry distemper shall be approved colour and of approved
brand and shall conform to the requirements prescribed in IS:427 & 428.
The shade shall be got approved from the architect/.consultant before
application. The dry distemper of approved brand and colur shall be
stirred slowly in clean water using 6 declitres (0.6 litres) of water per kg of
distemper or as specified by the manufacturer. Warm water shall be used.
It shall be allowed to stand for atleast 30 minutes before use. The mixture
shall be well stirred before and during use to maintain an even
consistency. Distemper shall not be mixed in larger quantity than is
actually required for one day’s work.

20.5.2 Oil bound distemper :
The specifications and condition for this shall be the same as that
applicable for dry distemper, except that oil bound distemper of
approved make, shade and colour shall be used after applying priming
coat of petrifying liquid or other primer as may be recommended by the
manufacturer / supplier. It shall conform to IS:428.

20.5.3 Scaffolding :

Same as for ‘Cement Paint’.



20.6.0 Heritage wall finish :

It shall be from Bakelite Hylam Ltd or equivalent as approved by the
architect/consultant. It shall conform to International Standards.

It shall be two-component finish. It shall be easily applicable using trowels
and no special tools and training shall be required for application. The
single coat application thickness shall be 1.52mm of colour and texture as
approved by the architect. It shall be weather and fade reistant water
and damp reistant, durable, highly washable. It shall be acid and alkali
reistant, high abration reistant, non-toxic and shall be capable to take
any shade. It can be applied on wide vatriety of suface like cement
mortar, plywood, plaster baord, AC sheet, gypsum palster or any other
absorbent material to get homogenous layer.

It shall be incombustible and flexible. It shall be good fire reistant, anti-
fungal, good impact reistant having adhesion strength more than
8kg/sqcm. There shall not be any development of hairline cracks and no
peeling off shall occur after the maximum drying time of 4 hours and
during period of 2 days.

20.7.0 Acrylic emulsion paint :

It shall be water based acrylic co-polymer emulsion with rutile titanium-
dio-oxide and other selected pigment and fungicide. It shall exhibit
excellent adhension to plaster and cement surface and shall reist
deterioration by alkaly salts. The paint film shall allow the moisture in the
wall to escape without peeling or blistering the paint. After it is dried, the
paint should be able to withstand washing with mild soap and water
without any deterioration in colour or without showing flaking, blistering or
peeling.
20.8 CEMENT PAINTING

All outside exposed surfaces of masonary and concrete shall be painted
with cement paint of approved make and shade .
The surface shall be thoroughly cleaned & wetted with water just before
the painting commence.
Cement paint shall be mixed with water as per the specification of
manufacturer. Cement paint which can be used within an hour of its
mixing shall be prepared



20.9 PLASTIC EMULSION PAINT :
20.9.1 MATERIAL :
The plastic emulsion paint shall be of approved brand and manufacturer
and of the required shade.
20.9.2 APPLICATION
The number of coats shall be as specified. The paint shall be applied with
brushes or rollers. The thinning of the emulsion is to be done with water
only and not turpentine. The quantity of water to be added shall be as
specified by the manufacturer. The surface finish shall be flat, velvety and
smooth.
20.9.3 PRECAUTIONS :
Old brushes shall not be used. Oil based Putties for filling in cracks,
depressions, etc. shall not be used. Splashes if any, shall be cleaned
immediately as they will be difficult to remove afterwards. Washing of the
surface shall not be done within 3 to 4 week of application.
Other details shall be as Detailed in Oil Bound Distemper.


21.0.0 STEEL AND ALUMINIUM JOINERY

21.1.0 STEEL JOINERY :

21.1.1 General requirements :

Steel windows, ventinators and fixed lights shall conform generally to the
provisions prescribed in IS:1033 and IS:1361 and also dimensionally to the
details shown on the drawing. Rolled steel sections for the fabrication of
steel joinery and material to be used in the manufacture of the sections
shall conform to the requirements specified in IS:7452.18.1.2 Pressed steel
door frames :

a. Steel door frames shall be manufactured using 35 x 35 x 5 angle frame
   and 25 x 25 x 3 angle members bracing with 16 gauge MS sheet
   stitched welded to door shutter frame.
b. Steel doorframes shall be made true to profile and dimensions as
   specified in IS:4351 or as per drawings.
c. Each doorframe shall be consist of hinge jamb, lock jamb, head and ,
   if required, angle threshold. The whole shall be welded or rigidly fixed
   together by mechanical means. Where no angle threshold is required,
   temporary base tie shall be screwed to the feet of rames in order to
   form a rigid unit.
d. Fixing lugs shall have a head made of 25 wide x 1.6mm thick steel strip
   of specified length and a spilit end tall 40 mm wide x 1 mm thick and
   200 long. There shall be a minimum of three lugs to each jamb.
e. Hinges shall be made of 2.5mm thick mild steel with a zinc coated
   removable pin of 6 mm diameter (conforming to IS:1341)
f. Mortor guards shall be provided as specified and these shall be
   welded to the frame at the head of the frame for double shutter doors
   to make provision for bolts.
g. There shall be an adjustable lock strike plate of steel, complete with
   mortar guard, to make provision for locks or latches complying with the
   relevant Indian Standards. Lock-strike plates shall be of galvanized mild
   steel and fixed at 75cm to 90cm from finished floor level.
h. For side-hung door there shall not be less than three buffers of rubber
   or other suitable material inserted in holes in the rebate and one shall
   be located on the centre line of the lock-strike plate. For double-
   shutter doors there shall be two buffers of rubber or similar suitable
   material inserted in holes in the rebate in the lock jamb only at the
   head and spaced 15cm at either side of the centre line of the door.

21.1.2 Steel windows & ventilators :

a. Steel windows, and ventilators shall be manufactured from ordinary
   quality structural steel conforming to IS:1977. In case of composite units
   consisting of a combination of two or more units of windows and
   ventilators different units shall be coupled by using coupling sections
   made fromapproved Z sections.. The weight of various rolled steel
   sections used for the manufacture of windows and ventilators shall be
   as per those specified in IS:1038 unless otherwise specified.
b. Frames shall show no wrap or inferior workmanship. All openable
   windows shall be designed to open outside with glazing 5 mm thick
   glass on the outside of the frames unless mentioned otherwise. The
   hinges for side-hung shutters shall be of projecting non-friction type
   and for top hung plain type unless specified. Hinge pins and washers
   shall be of galvanised steel or aluminium alloy of suitable thickness.
   Weather bars shall be titted to fabricated coupling section wherever
   required.
c. Steel ventilators with fixed louvers shall comprise of 16 gauge pressed
   steel guides spaced at 50mmc/c for reciving glass louvers 4mm thick.
   MS pressed steel louvers shall be fabricated out of 16 gauge sheet
   bent to ‘Z’ shape and shall be tack welded to frames.


21.1.3 Rolling Shutters :

a. Rolling shutters shall in general conform to IS:6248 and shall be
   fabricated out of mild steel laths having interlocking curls at both
   edges with 12mm minimum depth of corrugation for resisting manual
   pressure and normal wind pressure. The laths shall be fabricated out of
   cold rolled steel strips. Conforming to IS:4030. Each lath section shall be
   continuous single piece without any welded joint. The water shielding
   surface shall be kept on the side exposed to atmosphere. When
   interlocked the roling centres of the laths shall be a 75mm centres
   minimum. Each alternate lath section shall be fitted with malleable
   cast iron (conforming to IS:2108) or mild steel clips securely riveted at
   either end and thus preventing their lateral movement and wearing of
   their edges against the guide channels. The clips shall be so designed
   so as to fit the contour of the lath sections.
b. The shutter shall be provided with bottom lock plate fabricated out of
   3.15mm thick mild steel sheet reinforced by an angle iron stiffener of
   not less than 35x35x5 mm size at the bottom and MS flat at the top. It
   shall be interlocked with the bottom lath so as to have a firm contact
   agaisnt the sill while the shutter is in closed position. The lock plate shall
   be fitted with necessary sliding bolts and pulling handles usable from
   both interior and exterior sides of the plate.
c. The guide channels shall be either of rolled section or one piece
   pressed construction and shall be of thickenss not less than 3.5 mm.
   The depth and width of guides shall be such that there is sufficient
   clearance between the curtain and the inner surface of guides to
   ensure not only free movement of curtain but holding it firmly at the
   ends upto a maximum wind pressure of 200kg/sqm and preventing it
   from rattling as well. The minimum depth of channel shall be 65mm for
   widths upto 3.50 m and 75mm for widths more than 3.50 metres. Width
   of guide channel shall be 25mm for lath sections with depth of
   corrugation 12mm. The guide channel shall have minimum 3 numbers
   of MS holdfasts and the maximum spacing shall however, not exceed
     750mm. Provision of MS stopper at the maximum height shall be made
     ont he guide channels.
d.   Bracket plates shall be of hexagonal, square or circular contour and
     shall have a U-shaped cast iron or mild steel clamp welded to it at the
     centre. The bracket plate shall be made out of 0.9 mm thick mild steel
     plate and size shall conform to the requirements in IS code.The plate
     shall be held in position rigidly by means of suitable foundation bolts
     and in the case of push and pull type shutter, extra tying to the guide
     channel by means of a square bar not less than 20mm size shall be
     provided.
e.   The suspension shaft of the roller shall be made of heavy duty steel
     pipe conforming to IS:1161 and shall be of adequate diameter to have
     minimum defletion with suitable flange coupling. The pipes of the shaft
     that are clamped to the brackets shall be fitted with rotatable cast iron
     pulleys to which the curtain is attached. The pulleys and the pipe shaft
     shall be connected by means of pre-tensioned helical springs, flat or
     coil type conforming to grade2 of IS:4454 hardened and tempered.
f.   Ball bearings provided for rolling shutters shall be two-row self-aligning
     type with special cast iron coatings at the extreme pulleys at either
     end. The pulleys shall be interconnected with a cage formed out of
     mild steel flats of at least 32 x 6mm and spaced at 15cm.
g.   The hood cover shall be made of 0.9 mm thick MS sheets with
     necessary stiffeners and framework. The cover shall be of hexagonal,
     square or circular contour depending on the bracket plate contour.
     This shall be supported at regular intervals to prevent sagging.
h.   Unless otherwise specified for overall area of rolling shutters upto 10
     square metres, pull and push type hand operated shutters with ball
     bearings shall be provided. For areas more than 10 sq.m and upto 35
     sq.m                                                          mechanical
     operated gear type will ball bearings shall be provided. A pulling hook
     shall be provided for each of the rolling shutters. The pulling hook shall
     consist of 12mm diameter rod with a hook at one end and a ring at the
     other end of eduquate length.


21.1.5 Supply :

All doors frames, windows and ventilators shall be despatched with the
opening parts suitably secured to preserve alignment when fixing and
glazing.

Fixing lugs, couplings, fittings and all hardware shall be despatched
separately.
Composite windows shall be despatched uncoupled.

21.2.0 Aluminium Joinery

21.2.1.General requirements :

a. Anodised/powder coated aluminium joinery shall conform to the
   requirements specified in IS:1948 and 1949 and shall be of Hindalco,
   Jindal or equivalent reputed make with size and design as per relevant
   drawings. The average thickness of anodised /powder coat shall not
   be less than 15 microns (IS:7088) and shall be matt finished.
b. Aluminium doors, windows, ventilators shall be made of aluminium alloy
   conforming to IS:733 and sections shall generally conform to IS:1948.
   Coupling members forming composite sections shall be of extruded
   aluminium alloy section. All frames shall have corners machine-jointed
   to a true right angle. For side hung shutters, hinges shall normally be of
   projecting type made of aluminium alloy and riveted/machine-jointed
   to frame and shall have stainless steel/aluminium alloy pins.
   Irrespective of the hinges being anodised or not, the aluminium alloy
   pins shall be anodised(minimum 15 micron) / powder coated(minimum
   50 micron) and shall be sealed with oil or wax. Handles, peg stays shall
   be of approved heavy-duty quality aluminium or its alloy conforming to
   IS specifications.
c. The doorframe and shutters shall be single action or double action as
   indicated in the drawing with hydraulic door closer in the floor. The
   doors shall be provided with anodized aluminium door handles for full
   width of door inside and outside. The door frame shall be provided with
   approved anchors spaced not more than 900 mm centres.
d. Before erecting, frames coming into contact with concrete, masonry,
   plaster or dissimilar metals, shall be coated with a thick layer of clear
   transparent lacquuer based on methacrylates or cellulose bytyrate,
   which is compatible with zinc chromate to protect the surface from
   wet cement during installation. This lacquer coating shall be removed
   after installation is completed. Before handing over, the aluminium
   work shall be washed with mild solution of non-alkali soap and water.


Gaskets to be used shall be made of neoprene of approved make and
shall be approved by the Client/Consultant before fixing in position. The
sealant shall be of approved make and shall be duly approved before
application. Aluminium doors, windows and ventilators after fixing in
position shall be watertight and airtight.
Aluminium material used shall be specially anodised / powder coated for
protection against corrosion in marine environment in approved shade.
The anodic coating shall conform to IS:1868 and shall have minimum
thickness of 15 microns when measured as per IS:660/2. The anodic
coating shall be double sealed or alternatively sealed with steam and
shall be of minimum thickness of 15 microns. The anodic coating shall be
tested in a laboratory by Eddy current method as per IS:6012 for
thickness. Sulphuric acid shall be used as the electrolyte for the anodic
process.

Wherever specified, polyster grade machine applied power coating of
minimum thickness 50 microns shall be provided and such coating shall be
of approved shade.

21.2.2 Supply :

Same as for steel joinery.

21.2.3 Unloading and Stacking :
The fabricated frames shall be transported, unloaded, stacked and
handled in a careful manner. They shall be stacked on edge on level
bearers and supported evenly. Al precautions shall be taken to ensure
that the frames are not damaged or distorted in any manner. As decided
by the Client/Consultant, the damaged or distorted frames shall be
replaced and made good at the expense of the contractor. Generally,
storage of doors and frames shall conform to IS:4082.

21.2.4 Sampling :

Sampling and criteria for conformity for steel/aluminium doors, windows,
ventilators and fixed lights shall be as prescribed in the respective Indian
Standards.


22.0.0 Hardware for joinery works

22.1.0 General requirements :

a. Fittings shall be of MS, brass, aluminium or as specified. These shall be
   smooth and free from sharp edges, corners, flaws and other defects.
   Screw holes shall be countersunk to suit the head of specified wood
   screws. All hinge pins shall be of steel and their rivetted heads shall be
   well formed.
b. MS fittings shall be finished bright or black enamelled or copper
   oxidised or painted as specified. Brass fittings shall be finished bright
   (brass), oxidised or chromium plated (electroplated) and aluminium
   fittings shall be finished bright or anodised or powder coated or as
   specified. Fittings shall be approved by the Client/Consultant before
   fixing. Screws used for fittings shall be of the same metal as that of the
   fittings. However, anodised cadmium / chromium plated brass screws
   of approved quality shall be used for fixing aluminium fittings. In case of
   renewal works, the new fittings shall as far as possible, match with he
   existing ones. Screws shall be driven home with screw driver and not
   hamemred in.

22.2.0 Hinges

22.2.1 Butt Hinges :

These shall be mild steel but Hinges (medium), brass butt Hinges
(light/ordinary), brass butt Hinge (heavy), brass oxidised butt V
(light/ordinary), brass oxidised butt V (heavy), extruded aluminium alloy
butt V or as specified. Brass and MS butt Hinges shall generally conform to
IS:205 and IS:1341 respectively.

22.2.2 Parliament Hinges :
These shall be mild steel or cast brass or as specified and shall generally
conform to IS:362.

22.2.3 Spring Hinges :

These shall be made of MS or brass casing with steel spring and shall
conform generally to IS:453. Hinges shall work smoothly and hold the door
shutters truly vertical in closed position. The size of spring Hinge shall be
taken as length of its plate.

22.2.4 Piano Hinges :

These shall conform to IS:3818 and shall be made of mild steel, brass, or
aluminium alloy sheets. Mild steel Hinges shall be finished with anticorrosive
treatment or plating of brass or nickel as specified. Piano hinges shall be
fixed for the full height of cupboard shutters.

22.2.5 Tee Hinges :

These shall be made of MS sheets and finished bright. They shall conform
to IS:206.
22.3.0 Sliding Door Bolts :

These shall be of aluminium and conform to IS:2681. They shall be capable
of smooth sliding action. Alternative materials may be adopted on the
approval of the Client/Consultant for specific locations.

22.4.0 Door latch :

These shall be mild steel, brass or as specified and shall be capable of
smooth sliding action.

22.5.0 Tower Bolts :

Tower bolts may be of one of the following types :

Brass barrel tower bolt with cast brass barallel and rolled or drawn brass
bolt.

Brass barrel tower bolt with brass sheet barallel and rolled or drawn brass
bolt.

Anodised aluminium barrel tower botl with barrel and bolt of extruded
sections of aluminium alloy (10/12mm dia shoot).

MS tower bolt with barrel.

These shall generally conform to IS:204 Parts 1&2) steel spring and ball shall
be provided between the bolt and the barrel.

22.6.0 Door handles :

These shall be cast brass or MS or aluminium of specified size and of the
shape and pattern as approved by Client/Consultant. These shall
generaly conform to IS;208. The size of the handle shall be determined by
the inside grip of the handle. Door handles shall be of 100 mm size and
window handles of 75 mm size unless otherwise specified. These shall be
fixed with 25mm long screws.

22.7.0 Mortice Lock :

Mortice lock with latch and pair of lever handles shall have steel or brass
casing and brass bolts and shall be right or left handed as shown in the
drawing or as directed by the Client/Consultant. It shall be fo the
approved quality and shall conform to IS;2209. The shape and pattern
shall be approved by the Client/Consultant. The size of the lock shall be
determined by its length. The lock for single leaf door shall have plain face
and that for double leaf door shall have a rebated face. Lever handles
with springs shall be mounted on plates and shall weigh not less than 0.5
kg per pair. These shall be of brass, finished bright chromium palted or
oxidised.

22.8.0 Floor door stopper :

This shall be made of cast brass or anodised aluminium and shall have a
rubber cushion. The type and pattern shall be as approved by the
Client/Consultant.

22.9.0 Hooks and Eyes :

These shall be of hard drawn brass or steel and shall generally conform to
IS:207.

22.10.0 Casement Window Fasteners :

These shall be made of cast brass, anodised alumiumum or choromium
plated steel. Casement fasterners for single leaf window shutter shall be
left or right handed as specified. These shall nto weigh less than 0.20 kg
per fastener.

22.11.0 Casement Stays :

These shall be made of cast brass, anodised aluminium or chromium
plated steel. The stay shall be made from channel section and shall not
weigh less than that indicated below :

200 mm              ---       0.24 kg each
250mm               ---       0.28 kg each
300 mm              ---       0.33 kg each

The shape      and        pattern   of   stays   shall   be   approved   by   the
Client/Consultant.

These shall be made of cast brass, anodised aluminium or C.P. Steel. The
shape and pattern shall be approved by the Client/Consultant. It shall not
weigh less than 0.20 kg each.

22.12.0 Fan /Light Pivots :
These shall be made of cast brass or C.P. Steel and shall generally
conform to IS:1837. The base and socket plate shall be made from
minimum 3.15 mm thick brass or CP steel plate and projected pivot shall
not tbe less than 12 mm in diameter and 12 mm in length, cast in single
pieces withthe base palte.

22.13.0 Fan light catch :

These shall be made of cast brass or CP steel and shall generally conform
to IS:364. Steel springs of the catch shall be 0.90mm dia 6 coils 12 mm
internal diameter and 20 mm long. The pattern and the shape of the
catch shall be as approved by the Client/Consultant.

22.14.0      Chain with hook for fan light :

This shall be made of hard drawn brass or cast brass or CP steel welded or
twisted as specified and shall generally conform to IS:3828. One end of
the chain shall be provided with an eye and the other end with staple.
The minimum thickness of plates shall be 2.24 mm and the chain shall be
300 mm long made from minimum 4 mm hard drawn wire.

22.15.0      Hasp and staple :

Hasp and staple (safety type) shall be made of cast brass or CP steel or
alumimium and generally conform to IS:363. The hinge pin whih in all
cases shall be of mild steel, shall be firm and its riveted head well formed.
The movement of the hasp shall be free, easy and square and shall not
have any play or shake. The hasp shall fit the staple correctly. The size shall
be determined by the length of the bigger leaf of the hasp.

22.16.0      Cupboard lock :

These shall be made of cast brass conforming to IS;729 and shall be of
approved make. The lock shall be easy in working having duplicate keys.

22.17.0      Hydraulic door closer :

These shall conform to IS:3564 and be of brand approved by the
Client/Consultant for both left and right hand openings.

Hardware and fixtures shall be as specified in the drawings or shcedule of
quanitites. All hardware and fixtures shall be able to withstand repeated
use. Door closer shall be suitable for doors weighing 61-80 kg. Unless
otherwise stated. Each closer shall be guaranteed against manufacturing
defect for one year and any defect found within this period shall be
rectified or the closer replaced free of charge. Concealed door closers
shall be either floor mounted or transome sounted, suitable for installation
with metal doors. It shall conform to the performance requirements and
endurance test stated in IS;3564.

23.0.0 GLAZING :

23.1.0 General requirements :

23.1.1 The glass used for glazing works shall be of the best quality
transparent and free from blisters, specks, bubbles, stones, scratches,
veins, air holes and other defects so as to give a clear visibility through
the glass.

23.1.2 All glass shall be procured from a reputed manufacturer and duly
approved by Client/Consultant. The glass supplied at site shall conform to
the requirements indicated in the schedule of items and the following
Indian Standards listed below :

a. Sheet glass of selected quality as pe IS:2835.
b. Wired and wired-figured glass as per IS:5437.


23.2.0 Sheet glass :

General :

Sheet glass is a flat transparent glass made by blowing or drawing and it
shall be, to the extent possible, colourless as judged by the un-aided eye
except when viewed edgewise showing a light blue to green tint.

Unless otherwise specified sheet glass shall weigh 7.5 kg/sqm for panes
upto 600x600 mm. For panes larger than 600x600mm and upto 800x800
mm glass weighting not less than 8.7 kg/sqm shall be used. For bigger
panes upto 900x900 mm glass weighting not less than 11.25 kg/sqm shall
be used.

Sheet glass shall be patent flattened glass of best quality and for glazing
and framing purposes shall conform to IS:1761.

23.2.2       Testing :
Tests for waviness, warpage, lines, etc. shall be done as per Appendix - A
of IS:2835 and test for thickness shall be doen as per Appendix-B of IS:2835.

Any glass, found to suffer from defects beyond allowable limits (as per
Table-2, IS;2835) shall be rejected.


23.2.3           Sampling :

Reperesentative samples of the amterial shall be drawn and adjudged for
conformity with this specification as prescribed in Appendix C, IS;2835.

23.2.4           Packing and marking :

Sheet glass shall be packed as agreed to between the purchaser and the
supplier. The packages shall be marked with ISI certification mark.
Packages shall also be marked with name and quality of the material,
nominal thickness and cut size, name of the manufacturer, as per clause
6.0 of IS;2835.


23.3.0 Plate glass :

Plate glass shall be polished patent flat glass of best quality. It shall have
both
the surfaces ground flat and parallel and polished to obtain clear
undisturbed vision and reflection. The plate glass shall be of thickness
mentioned in the item or as shown in detailed drawings or as specified. In
absence of any specified thickness, the thickenss of plate glass to be
supplied shall be 6 mm and a tolerance fo 0.2 mm shall be admissible.

23.4.0 Putty :

The material shall be a homogenous paste and shall be free from dust, grit
and other visible impurities and shall conform tot he specifications
prescribed in IS;419.

Putty may be prepared by mixing one part of white lead with three parts
of finely powdered chalk or then adding boiled linseed oil to the mixture
to form a stiff paste and adding varnish to the paste at the rate of 1 litre
to varnish to 18 kg of paste.


24.0.0 AC SHEET & ACCESSORIES
24.1.0 General requirements :

24.1.1 The asbestos cement sheets used for roofing and cladding shall be
plain, corrugated or semi-corrugated sheets from Everest or approved
make conforming to IS:459.

24.1.2 It shall be manufactured by reinforcing Asbestos to cement in such
a manner that every fibre is coated with fine particles of cement to ensure
maximum strength. It shall be alkali reisstant and anti-corrosive. It should
not break during transportation, handling, laying and shall be non-
inflammable non-organic. It shall be resistant having high tensile strength
and high slendeness ratio.

24.1.3 The minimum nominal thickness of sheets shall be 6 mm, having
covering efficiency of about 90% and weight 1.518kg/sqm. The
permissible bending stress s shall be 130 kg/sqm.


24.1.4 The accessories shall be same thickness that of AC sheets. They shall
be suitable for the type of sheet and location. They shall be from
approved manufacture and free from any defect.

24.1.5 All fixing accessories shall conform to IS:730 and IS:1626. The
diameter of the bolts shall not be less than 8mm. The J-bolts shall be
atleast 90mm longer at lap points of sheets and 75mm longer at other
points than the depth required to hook the bolt to the purlin. The
galvanised iron washers shall be 25mm in diameter and 1.6mm thick. The
bitumen washer shall be 35mm in diameter and 1.5 mm thick.

24.1.6 Bridges shall be of type specified in the schedule such as “one
piece plain angular”, “plain wing adjustable”, “Serrated adjustable”,.
“Close fitting adjustable” or “Northlight two pieces” adjustable and
appropriate for the corrugated sheets used. “Plain wing angular” type of
ridges can be used only if the slope of the roof is between 26 and 30
degrees. Ridges, hip section and other accessories shall be of the same
manufacture as that of sheets used for the roof unless otherwise permitted
by the Client/Consultant.

24.1.7 The sheets shall have rectangular shape, corrugations true and
regular, edges straight and clean, smooth surface on exposed side and
free from cracks and visible defects, holes, deformation, chipped edges
or otherwise damage.
24.1.8 All the AC sheets shall be painted with 3 coats of lime wash on the
underside unless otherwise specified.

24.1.9 Water absorption shall not exceed 28 percent of dry weight.

24.2.0 Testing :

Testing of asbestos cement products shall be done in accordance with
the methods prescribed in IS:5913.

24.3.0 Storage :

       Storage of AC sheets and accessories shall in general conform to
IS:4082.
       The materials shall be handled and stored in the manner as not to
damage the same. AC sheets shall be stacked on a firm and levelled
ground, laid on wooden battens according to the approved stacking
methods and/or instructions of the manufacturer. They shall be protected
from damage and when they are to be stacked for a longer period, they
shall be stored under cover.

25.0.0 GALVANISED IRON SHEET

Galvanised iron sheets shall be from TATA or equivalent as approved by
Engineer-in-charge.

25.1.0 General requirements :

25.1.1 G.I. Sheets used for roofing and cladding shall generally conform to
the requirements prescribed in IS:277 and shall be of the best quality duly
approved by the Client/Consultant.

25.1.2 : The base metal for galvanised sheets and coils shall be hot or cold
rolled mild steel conforming to IS:513. The sheets shall be free from cracks,
spilt edges, twist, surface flaws, etc.. They shall be clean, bright and
smooth. The galvanizing shall be uninjured and in perfect condition. The
sheets shall show no signs of rust or white powdery deposits on the surface.
The corrugation shall be uniform in depth and pitch and parallel to the
sides.

25.1.3 Minimum thickness of GI sheets to be used for roofing shall be 0.63
mm thick (24gauge) unless noted otherwise in the drawings or in the
schedule of items.
25.1.4 Unless otherwise mentioned in the schedule, the necessary
accessories like flashing, ridging, capping, gable end corner piece, barge
boards etc. shall be made out of 20 gauge (1mm minimum) galvanized
sheets.

25.1.5 All fixing accessories shall conform to the requirements specified in
IS:730.

26.2.0 Testing :

26.2.1 Testing shall be done in accordance witht he provisions prescribed
in IS:277.

26.3.0 Storage

26..3.1       Storage of GI sheets and accessories shall in general conform
to IS:4082.

27.0.0 COLOUR COATED METTALIC SHEET AND ACCESSORIES

27.1.0 General                                                  requirements

27.1.1 Colour coated sheets shall be made out of cold or hot rolled MS
sheets conforming to IS:513 galvanised as per IS:277 and shall be of the
best quality.

27.1.2 Colour coating requirements shall be in accordance with relevant
indian or foreign standards ensuring a perfect and integral chemical
bond between the base metal and the polymer coat.

27.1.3 The sheets shall be free from cracks, twist, surface flaws, spilt edges
and any other defects which could impair the strength and quality of the
material.

27.1.4 The profile of the sheets shall be uniform, smooth, regular and true
to shape.

27.1.5 The colour shades shall be consistent and free from visible defects.

27.1.6 Unless mentioned otherwise all necessary accessories shall be duly
approved by the Client/Consultant.

27.2.0 Sampling :
10.2.1 Representative samples of the product shall be kept in the office of
the cilent for periodic checks by Client/Consultant on compliance of
quality of material actually used for the work.

27.3.0 Storage :

27.3.1 Storage of colour coated sheets and accessories shall in general
conform to IS:4082 and as per manufacturer’s specifications.



28..0 FALSE CEILING :

28.1.0 General requirements :

28.1.1 The cieling baords shall conform to the requirements specified in the
schedule of items or in the drawings. They shall be strong and with uniform
texture without cracks, holes or any other defects.

28.1.2 Galvanised steel grid system :

Main runner-Hot dipped galvanised steel, T shaped of 24x38mm size and
thickenss 0.33mm cross runner - Hot diipped galvanised steel, T shaped of
24x30mm size, thickness 0.25mm. 1200 mm long and 24x25mm size,
thickness 0.25mm, 600 mm long. Perimeter section shall be same material
as runners. Sections shall be 22x22mm size with thickness of 0.45 mm.
Exposed areas of all metallic members shall be powder coated to a
thickness of 25 micron.

28.1.3 Gypsum Board Tiles with Seamless Joints :

The above shall be of the best quality from India Gypsum or equivalent as
approve by the architect. It shall be formed by enclosing and bonding
together a core of set gypsum plaster by two sheets of heavy paper. It
shall offer high standard of safety, thermal efficiency and aesthetics. It
shall be height weight, offer good fire resistance. It shall be a non-
resonant material, rendering sound insulation. It shall be strong, durable
and dimensionally stable. It shall offer a smooth surface which can be
painted, tiled or wall-papered. It shall block this passage of heat and shall
retard the spread of fire. It shall reduce upto 60 db of sound.

Gypsum boards shall conform to IS:2095-1982 & IS:2542-1981.
It shall be resistant to delamination due ot moisture and cyclic changes in
weather and humidity.

The density shall be 288 kg/cum and the weight shall vary from 8-
12.8kg/sqm depending on the thickness. It shall be available in thickness
of 9.5, 12.5 and 15mm.

Standard sizes are 610x610mm, 1220x1220mm and 1220x610mm.

28.1.4 Steel false ceiling :

28.1.5 Panels shall be of cold rolled steel, galvanised as per IS:277 coil
coated as per IS 3312. Panels shall be 150 wide and 17mm deep. They
shall be roll-formed out of 0.55 mm TCT coil coated glavanised steel. They
shall be degreased, pretreated and coil coated on one side in
manufacturer’s standard shades. The rear of the panels shall be given a
coat of primer and a wash coat, while the finished side will be given a
coat of primer and a finish colour coat in polyester paint for a minimum
dry film thickness of 20 microns. Panels shall be factory cut to lengths upto
5m to suit site dimensions.

28.1.6 Panel Stringers shall be 34.5 mm wide and 48 mm deep with cutouts
to hold panels in a module of 150mm. They shall be roll-formed out of
0.6mm thick galvanised steel strip cut to a standard length of 5m. Stringers
shall be stove enameled black.

28.1.7 Stringers shall be suspended from the roof/truss by galvanised steel
wire rod hangers and suspension clips. Hangers shall be fixed to roof by J
hooks and nylon inserts or using 18g annealed GI wire.

28.1.8 Edge profiles shall be L shaped, roll formed out of 0.65mm
aluminium strip/0.6 mm galvanised steel strip with pwder coating in
standard colours.

28.2.0 Testing :

28.2.1 Tests shall be carried out in accordance witht he provisions of
relevant standards and as directed by the client/consultant.

29.0.0 Miscellaneous materials :

29.1.0 Performed filler baord for joints :
29.1.1 Perromed filler baord shall be “SHALITEK” or equivalent conforming
to IS:1838 and should consist of a fibre baord impregnated with
bitumenous materials to render it durable and waterproof. It should be
compressible and possess a high degree of resilience. It shall withstand
dampen minor vibrations.

29.1.2 The filler should permit free movement of the concrete members in
expansion and contraction and should provide waterproof seal and resist
entry of any forreign material. The filler should be resilient and non-
extrudible.

29.2.0 Polysulphide sealant :

29.2.1 Polysulphide sealants shall be of approved make and shall comply
with all the requirements prescribed in IS:12118.

29.2.2 It shall be a two-component polysulphide rubber joint sealant
based on low molecular weight polymer. It should not contain chlorides or
other corrosive substances.

29.2.3 The modulus of elasticity of the sealant shall not be less than 0.16
Mpa+/-10% at 100% ekibgatuib, tge sgire “A’ hardness shall be 22+/-
3@25°C. The operating temperature range shall be -25°C to 80°C. The
permanent dynamic movement capability shall be +/-25%. The tensile
strength shall not be less than 0.4Mpa.

29.2.4 It shall posses properties like 550% elongation at break, non-toxicity
when fully cured, no staining, shrinkage less than 1%. The trafficable
strength shall be achieved within 24 hrs and full at 7 days (at 25°C & 250%
RH).

30.0.0 BITUMEN WORKS

30.1 SEMI DENSE BITUMINOUS CONCRETE

30.1.1 Scope

This work shall consist of constructing in a single layer,semi dense
bituminous concrete (asphaltic     concrete) of thickness 25 mm on
previously prepared bituminous course .

30.1.2.     Materials

Bitumen : 60/70 grade
Coarse aggregates : Stone Polishing Value as measured by BS : 812 (Part
114) shall not be less tha 55. The aggregates shall satisfyl the physical
requirements as given in these specification except that the maximum
value for the water absorption should be 1 per cent.

Fine aggregates :
Filler : Coarse sand.
Aggregates gradation : The mineral aggregates, including mineral filler
shall be so graded or combined as to conform to the grading set forth in
Table given below.
         TABLE- AGGREGATES GRADATION FOR BITUMINOUS CONCRETE

IS Sieve Designation                              Per cent passing the
sieve by                                                         weight

         26.5    mm                                     100
         19      mm                                     90-100
         9.5     mm                                     56-80
         4.75    mm                                     35-65
         2.36    mm                                     23-49
         300     micron                                 5-19
         75      micron                                 2-8

30.1.3           Mix Design

Requirement of mix : Apart from conformity with the grading and quality
requirements of individual ingredients, the mix shall meet the requirements
set forth in following Table-

                TABLE- REQUIREMENTS OF BITUMINOUS CONCRETE MIX

S.NO.            DESCRIPTION                      REQUIREMENTS

1.       Marshall stability (ASTM Designation :    820 kg (1800 ib)
         D-1559) determined on Marshall speciments      Minimum
         Compacted by 75 compaction blows on each end

2.       Marshall flow (mm)                                           2-4

3.       Per cnet air voids in mix                                    3-4
4.   Per cent voids in mineral aggregates (VMA             Minimum11-13 per
cent

5.      Per cent voids in mineral aggregates Filled by bitumen (VFB)    65-
75

6.      Binder content, per cent by weight of total mix          minimum
4.5

7.      Water Sensitivity (ASTM D1075) loss of stability    Min. 75 per cent
        On immersion in water at 6060c                     retained strength

8.      Swell Test (Asphalt Instt. MS-2, No. 2)            1.5 per cent Max.

Binder content : The binder content shall be so fixed as to achieve the
requirements of the mix set forth in above Table . Marshall method for
arriving at the binder content shall be adopted.

Permissible variations from the job mix : The Contractor shall have the
responsibility of ensuring proportioning of materials in accordance with
the approved job mix and producing a uniform mix. The permissible
variations of individual percentages of various ingredients in the actual
mix from the job mix a may be within the limits as specified in Tabel below.
These variations are intended to apply to individual specimens taken for
quality control tests vide Section 900.

                TABLE- PERMISSIBLE VARIATION FROM JOB MIX

S.NO.         DESCRIPTION                             PERMISSIBLE VARIATION
                                                      BY WT OF TOTAL MIX IN %

1.      Aggregate passing 13.2 mm sieve and larger sieves:             + /-
8

2.      Aggregate passing 11.2 mm sieve and 5.6 mm sieves:             + /-
7

3.      Aggregate passing 2.8 mm sieve and 1.4 mm sieves:              +/ - 6

4.      Aggregate passing 710 microns sieve and 335 microns sieve      +/ - 5

5.      Aggregate passing 180 microns sieve                            +/ - 4
6.    Aggregate passing 90 microns sieve                                 +/ - 3

7.    Bitumen                                                           +/-
0.3

8.    Mixing tempreture                                               +/- 10
                                                                 degree
Centigrade



Construction Operations

Weather and seasonal limitation : Job shall not be carried out in rainy
season or when base course is damped and wet.
Preparation of base : The base on which bituminous concrete is to be laid
shall be prepared, shaped and conditioned to the specified levels, grade
and crossfall (camber) as directed by the Engineer in charge.

The surface shall be thoroughly swept clean free from dust and foreign
matter using mechanical broom and dust removed by mechanical
means or blown off by compressed air. In portions where mechanical
menas connot reach, other approved method shall be used.

 Tack coat : A tack coat shall be applied at the rate of 9.8 kg per 10
square meter of area.

Preparation of mix : The mix shall be prepared in hotmix plant only .

Spreading : The mix should be evenly spreaded and temprature shall not
be less than 121 degrees. Mechanical paver equipment shall be used if
directed by EIC.

Rolling : After being spread, consolidation shall be carried out by using 10
MT power roller.

Opening to Traffic: Traffic may be allowed immediately aftger completion
of the final rolling when the mix has cooled down to the surrounding
temperature.

Surface Finish of Work :
The surface finish of construction shall conform to the instruction of EIC.

Measurements for Payment
Bituminous concrete shall be measured as finished work in square metres.

Rate
The rate for bituminous concrete shall be for carrying out the job in all
respects including all material and labour complete.. The rate shall cover
the provision of bitumen in the mix at minimum 5.0 per cent of the weight
of the total mix .


31.0 SEAL COAT

Scope :       The work shall consist of application of a seal coat for sealing
the voids in a bituminous surface laid to the specified levels, grade and
cross fall (camber).

Seal coat shall be of Premixed seal coat comprising of a thin application
of fine aggregates premixed with bituminous binder. The compacted
thickness shall not less than 12 mm.

31.1.0       Materials

Binder : The quantity of bitumen shall be 19.6 kg per 10 square metres
area for seal coat respectively.

Aggregates for seal coat : The aggregates shall be fine stone aggregate
of 6 mm and down and or grit and shall consist of clean, hard, durable,
uncoated dry particles and shall be free from dust, soft or falky/elongated
material, organic matter or other deleterious substances. The aggregate
shall pass throgh 11.2 mm sieve 100% and reained on 2.36 mm sieve . The
quantity used for premixing shall be minimum 0.09 cubic metre per 10
square metre area.

Construction Operations:

Preparation of base : The seal coat shall be applied immediately after the
laying of bituminous premix course which is required to be sealed. Before
application of seal coat materials, the surface shall be cleaned freee of
any dust or other extraneous matter.

Construction of seal coat : Mixer of appropriate capacity and type shall
be used for preparation of mix material. The plant shall have separate
dryer arrangement for heating aggregate and pugmill for mixing
aggregate and binder
The binder shall be heated in boilers of suitable design, to the temperature
appropriate to the grade of bitumen approved by the Engineer. Also the
aggregates shall be dry and suitably heated to a temperature directed
by the Engineer before the same are placed in the mixer. Mixing of
binder with aggregates to the specified proportions shall be continued till
the latter are thoroughly coated with the former.

The mix shall be immediately transported from the mixing plant to the
point of use and spread uniformly on the bituminous surface to be sealed.

As soon as sufficient length has been covered with the premixed material,
the surface shall be rolled with 10 MT smooth - wheeled roller. Rolling shall
be continued till the premixed material completely seals the voids in the
bituminous course and a smooth uniform surface is obtained.

Opening to Traffic

Traffic may be allowed soon after final rolling when the premixed material
has cooled down to the surrounding temperature.

Materials not conforming to the Specification and requirements shall not
be brought to the work site.

32.0 BITUMEN MASTIC

SCOPE
This work shall consist of constructing a single layer of 25 mm thick Bitumen
Mastic wearing course for retail oulet driveways. The bitumen Mastic shall
be laid over the asphalted driveway.

The Bitumen Mastic is an intimate homogenous mixture of selected well -
graded aggregates and bitumen in such proportions as to yield a plastic
and voidless mass, which when applied hot can be trowelled and floated
to form a very dense impermeable surfacing.


Materials

Bitumen : The binder shall be straight-run bitumen of industrial grade 85/25
as conforming IS 702. The requirements of physical properties of bitumen
are as given below
          TABLE. REQUIREMENTS OF PHYSICAL PROPERTIES OF BITUMEN

S. No.        Characteristics                    Requirement
         Method of Tests

1.   Penetration at 25o C (in 1 / 100 cm)        20 to 40          IS :
1203

2.   Softening point (Ring and Ball method)      50o C to 90o C    IS :
1205

3.   Ductility at 27o C (Minimum)                10 cm             IS :
1208

4.   Loss on heating (Maximum)                   3 per cent        IS :
1212

5.   Solubility in CS2 (Minimum)                 99 per cent       IS :
1216

Coarse aggregates : The coarse aggregates shall consist of hard, durable
crushed stones, which shall be clean, strong, free of disintegrated piece,
organic and other deleterious matter and adherent coatings. They shall
be hydrophobic and of low porosity and shall satisfy the physical
requirements as mentioned in specification except that the maximum
value of water absorption shall be 1 per cent.

The percentage and grading of the coarse aggregates to be
incorporated in the bitumen mastic depending upon the thickness of the
finished course shall be as in given Table.
     TABLE 500-28. GRADING AND PERCENTAGE OF COARSE AGGREGATES

S.No Type of work          Thickness     Percentage          Grading of
Coarse
                           Of finished of Coarse             Aggregates
                           Course (mm)aggregates
                                                             Passing
        Percentage
                                                             I.S. Sieve

1.      Wearing course     25-40                30-40        19mm         100
        For pavement                                         13.2 mm      88-96
                                                40-50        2.36 mm      0-5


Fine aggregates : The fine aggregates shall be the fraction passing 2.36
mm and retained on 75 micron sieve consisting of crusher run screening,
natural sand or a mixture of both. These shall be clean, hard, durable,
uncoated, dry and free from any injurious soft or flaky pieces and organic
or deleterious substances.

Filler : The filler shall be limestone powder passing 75 micron sieve and
shall have a calcium carbonate content of not less than 80 per cent by
weight when determined in accordance with IS : 1195.

            The grading of the fine aggregates (Inclusive of Filler)

S.No.         I.S. Sieve           I.S. Seive           Percentage
              Passing                      Retained          by weight


1             2.36 mm                    600 micron          0.25

2             600 micron                 212 micron          5.35

3             212 micron                 75 micron           10.20

4             75 micron                  --                  30-50
5             Bitumen Binder                                 14-17




MIX DESIGN
Hardness number : The bitumen mastic shall have a hardness number of
60 to 80 at 250 C after adding coarse aggregates. The hardness number
shall be determined in accordance with the method specified in IS : 1195.

Binder content : The binder content shall be so fixed as to achieve the
requirements of the mix set iforth in above Clause and indicated in above
Table.

Job mix formula : The contractor shall intimate the Engineer in charge in
writing at least 20 days before the start of the work, the job mix formula
proposed to be used by him for the work, indicating the source and
location of all materials, proportions of all materials such as binder and
aggregates single definite percentage passing each sieve for the mixed
aggregates and result of the tests recommended in various Tables and
Clauses of this Specifications.

Construction Operations

Weather and seasonal limitations : As mentioned above.

Preparation of the base : The base on which bitumen mastic is to be laid
shall be prepared, shaped and conditioned to the specified levels, grade
and crossfall (camber) ias directed by the Engineer in charge. In case of a
cement concrete base, the surface shall be thoroughly swept and
scraped clean and free of dust and other deleterious matter. Under no
circumstances shall bitumen mastic be spread on base containing a
binder which will soften under high application temperature. If any such
spots or area are there, the same shall be cut out and repaired before the
bitumen mastic is laid with no extra cost.

Tack coat : A tack coat shall be applied at the rate of 9.8 kg per 10
square meter of area.

Preparation of bitumen mastic : Preparation of bitumen mastic consists of
two stages. The first stage shall be mixing of filler and fine aggregates and
then heating the mixture to a temperature of 170oC to 200oC. Required
quantity of bitumen shall be heated to 170oC to 180oC and added to the
heated aggregate. They shall be mixed and cooked in an approved type
of mechanically agitated mastic cooker for some time till the materials
are thoroughly mixed. Initially the filler alone is to be heated in the cooker
for an hour and then half the quantity of binder is added after heating
and mixing for some time, the fine aggregates and the balance of binder
are to be added and further cooked for about one hour. The second
stage is incorporation of coarse aggregates and cooking the mixture for a
total period of 3 hours. During cooking and mixing, care shall be taken to
ensure that the contents in the cooker are at no time heated to a
temperature exceeding 200oC.

In case where the material is not required for immediate use it shall be
cast into blocks with filler, fine aggregates and binder, weighing about 25
kg each. These blocks when required to be used, have to be reheated in
the mechanically agitated cooker to a temperature of not less than
170oC and not more than 200oC, thoroughly incorporated with the
requisite quantity of coarse aggregates and mixed continuously for not
less than an hour. Mixing shall be continued until laying operations are
completed so as to maintain the coarse aggregates in suspension. At no
stage during the process of mixing shall the temperature exceed 200oC.

The bitumen mastic blocks (without coarse aggregates) shall show on
analysis a compositions within the limits as given in Table below-

        COMPOSITION OF BITUMEN MASTIC BLOCKS WITHOUT COARSE
                            AGGREGATES

S.No.        I.S. Sieve        I.S. Seive         Percentage by weight
             Passing           Retained           Minimum
        Maximum

1             2.36 mm          600 micron         0                  22

2             600 micron       212 micron         4                  30

3             212 micron       75 micron          8                  18

4             75 micron        ---                25                 45

5             Bitumen Binder                      14                 17



The mix shall be transported to the laying site in a towed mixer transporter
having arrangement for stirring and keeping the mix hot during
transportation.

Spreading : The bitumen mastic shall be deposited directly on the
prepared base immediately in front of the spreader where it is spread
uniformly by means of wooden floats of the spreader to the required
thickness. The mix shall be laid in one meter width contained between
angle iron of sizes suitable to retain the required thickness. The
temperature of the mix at the time of laying shall be around 170oC. In
case blowing takes place while laying the bitumen mastic, the bubbles
shall be punctured while it is hot and the surface treated well.

Joints: It shall be ensured that all construction joints are properly and truly
made. These joints shalll be made by warning existing bitumen amstic by
the application of excess quantity of the bitumen mastic mix which
afterwards shall be trimmed off to make it flush with the surfaces on either
side.

Surface finish : The bitmen mastic surface can be slippery after floating ;
in order to provide resistance to skidding, the bitumen mastic after
spreading, while still hot, and in plastic condition shall be covered with a
layer of stone aggretates of 9.5 mm size (passing 13.2 mm sieve and
retained on 6.7 mm sieve). Hard stone chips of approved quality
precoatedd with bitumen at the rate the of two per cent of S-65 to S-90
penetration grades at 25 c at the rate of 0.005 cu.m. Per 10 sq.m. Shall be
rolled or otherwise pressed into the surface of the mastic layer when the
temperature of bitumen mastic is between 80 c and 100 c.

Opening to Traffic :The traffic may be allowed after completion of the
work when the bitmen mastic has cooled down to the surrounding
temperature.

Quality control of work
The type and grade of bitumen ; the quality grade and percentage of
coarse and fine aggregates and filler; the temperature control for heating
the materials/mix, laying, floating and compacting, hardness Number of
the bitumen mastic, etc., should be strictly followed as indicated in the
various clauses of this Specification or as directed by the Engineer in
charge.

The quality control tests for coarse and fine aggregates shall be exercised
by the Engineer in charge. For mineral filler, one test for each property for
every 5 tonnes, subject to a minimum of one test for each consignment
shall be carried out,
The surface of the bitumen mastic tested with a straight edge 3.0 m long,
placed paralled to the centre line of the carriasgeway shall have no
depression greater then 4 mm. The same limit shall also apply in case of
transverse profile when tested with a camber template.


Measurements for Payment
Bitumen mastic shall be measured as finished work in square metres .

33. DENSE BITUMINOUS MACADAM

Scope
This work shall consist of construction in a single course of 75 mm thick
base/binder course to the following Specifications on a previously
prepared base.

Materials

Bitumen : The bitumen shall be paving bitumen of Penetration Grade S 65
or A 65 (60/70) as per Indian Standard Specifications for “Paving Bitumen”
IS : 73. In case of non - availability of bitumen of this grade, S 90 (80/100)
grade bitumen may be used with the approval of the Engineer in charge.

Coarse aggregates : The coarse aggregates shall consist of crushed stone,
crushed gravel / shingle or other stones. They shall be clean, strong,
durable of fairly cubical shalpe and free from disintegrated pieces,
organic or other deleterious matter and adherent coating. The
aggregates shall preferably be hydrophobic and of low porosity. If
hydrophilic aggregates are to be used, the bitumen shall be treated with
antistripping agents of approved quality in suitable doses. The aggregates
shall satisfy the physical requirements set forth in Table given below-

If crushed gravel / shingle is used, not less than 90 per cent by weight of
the gravel / shingle pieces retained on 4.75 mm sieve shall have at least
two fractured faces. The portion of the total aggregate passing 4.75 mm
sieve shall have a sand equivalent value of not less than 50 when tested
in accordance with the requirement of IS : 2720 (Part - 37).

The plasticity index of the fraction passing the 425 micron sieve shall not
exceed 4.

PHYSICAL REQUIREMENTS OF AGGREGATES FOR DENSE BITUMINOUS
MACADAM

S.No.         Test                     Test Method
        Requirement
1     Los Angeles Abrasion Value*     IS : 2386 (Part-4)          40 percent

      maximum

2     Aggregate Impact value *        IS : 2386 (Part-4)          30 percent

      maximum

3     Flakiness and Eleongation **    IS : 2386 (Part-1)          30 percent
            Indices (Total)
      maximum

4     Coating and Stripping of Bitumen       AASHTO T 182         Minimum
retained    Aggregate Mixtures
coating 95 per cent

5    Soundness                        IS : 2386 (Part-5)
     (i) Loss with sodium                     5 cycles                 12
percent            Sulphate
     maximum

     (ii) Loss with Magnesium         5 cycles                    18 percent
                    Sulphate
     maximum
          6 Water absorption                 IS : 2386 (Part-3)        2
percent
     maximum

*      Aggregates may satisfy requirements of either of the two tests.
**     To determine this combined proportion the flaky stone from a
representative sample should first be separated out. Flakiness index is
weight of flaky stone metal divided by weight of stone sample. Only the
elongated particles be separated out form the remaining (non-flaky)
stone metal. Elongation index is weight of elongated particles divided by
total non-flaky particles. The value of flakiness index and elongation index
and elongation index so found are added up.

Fine aggregates : Fine aggregates shall be the fraction passing 2.36 mm
sieve and retained on 75 micron sieve, consisting of crusher-run screening,
gravel, sand or a mixture of both. Theses shall be clean hard, durable,
uncoated, dry and free from any injurious, soft or flaky pieces and organic
or other deleterious substances.
Filler : Filler shall consist of finely divided mineral matter such as rock dust,
hydrated lime or cement as directedby the Engineer in charge .

             The filler shall be graded within the following limits :

     IS Sieve                                         Percent     passing       by
weight

      600    micron                                                       100
      300    micron                                                       95-
100
      75     micron                                                       85-
100

The filler shall be free from organic impurities and have a plasticity index
not grater than 4. The plasticity index requirement shall not apply if filler is
cement of lime. When the coarse aggregate is grave, 2 percent by mass
of total aggregate of Portland cement or hydrated lime shall be added
and the percentage of fine aggregate reduced accordingly. Cement or
hydrated lime is not required when the gravel is limestone.

Aggregate gradation : The combined coarse and fine aggregates and
filler (when used) shall produce a mixture to confirm the grading set for in
Table given below -




                    AGGREGATE GRADATION FOR DENSE
                        BITUMINOUS MACADAM

      Sieve Designation                        Percentage passing the sieve
by                                                  weight

             37.5   mm                                              100
             26.5   mm                                              95-100
             13.2   mm                                              56-80
             4.75   mm                                              29-59
             2.36   mm                                              19-45
             300    micron                                          5-17
             75     micron                                          1-7
The aggregate mix, as used in work, shall not vary from the low limit on
one sieve to the limit on the adjacent sieve bug shall be well graded.

Mix Design

Requirement of mix : Apart from conformity with grading and quality
requirement of individual ingredients, the mix shall meet the requirements
set out in given Table -

            REQUIREMENTS OF DENSE BITUMINOUS MACADAM MIX

S.No.         Description                                  Requirements

1       Marshall stability (ASTM Designation - D - 1559)          820 kg (1800
lb)
        Determined on Marshall specimens compacted
        minimum
        By 75 compaction blows on each end

2       Marshall flow (mm)                                        2-4

3       Per vent Air voids                                        3 -5

4     Minimum voids in mineral aggregates (VMA)            10 percent - 12
per cent

5     Per cent voids in mineral aggregates filled by
      Bitumen (VFB)                                               65 - 75
6     Binder content per cent by weight of total mix       Not less than 4.0
per cent


Binder Content : The binder content shall be so fixed as to achieve the
requirements of the mix set out in above Table . Marshall method for
arriving at the binder content shall be adopted, replacing the aggregates
retained on 26.5 mm sieve by the aggregates passing 26.5 mm sieve and
retained 22.4 mm sieve.

APPLICABLE CODES AND SPECIFICATIONS;

The following specifications, standards and codes are made a part of this
specifications.  All standards, tentative specifications, specifications,
codes of practice referred to herein shall be the latest editions including
all applicable official amendments and revisions.

In case of discrepancy between this specification and those referred to
herein, this specificaiton shall govern.

APPLICABLE IS SPECIFICATIONS AND CODES OF PRACTICE:

IS 269:- Specification for ordinary, rapid hardening and low heat portland
cement.

IS 8112:- Specification for high strength ordinary, portland cement.

IS 1489 - Specification for portland - pozzolona cement.

IS 383:- Specification for coarse and find aggregates from natural source
for concrete.

IS 2386:- Methods of test for aggregates for concrete. (Part I to VIII)

IS 516:- Method of test for strength of concrete.

IS 1199:- Method of sampling and analysis of concrete.

IS 3025:- Methods of sampling and test (Physical and chemical) water
used in industry.

IS 432:- Specification for mild steel and medium tensile steel (parts I & II)
bars and hard drawn steel wire for concrete reinforcement.

IS 1139:- Specification for hot rolled mild steel and medium tensile steel
deformed bars for concrete reinforcement.

IS 1566:- Specification for plain hard drawn steel wire fabric (Part I) for
concrete reinforcement.

IS 1786:-   Specification for cold twisted steel bars for concrete
reinforcement.

IS 2645:- Specification for integral cement waterproofing compound.

IS 456:- Code of practice for plain and reinforced concrete.
IS 3370:- Code of practice for concrete structures for storage of liquids
(Part I to IV)

IS 2502:- Code of practice for bending and fixing of bars for concrete
reinforcement.

IS 2571:- Code of practice for laying in situ cement concrete flooring.

IS 3596:- Safety code for scaffolds and ladders. (Part I & II)

IS 1200:- Method of measurement of building works.

CPWD Specification volume I & II

MOST specification




                           TESTING OF MATERIALS


The contractor shall carryout the following tests at his own expense and as
directed by the Engg.-in-charge. Also Engineer-In-Charge reserves their
right to ask the contractor to carry out any further tests on any material
which is being used in the project.


1. WATER: Suitability for construction/ concreting purposes as per IS 456-
2000


Periodicity: One test at the beginning of the project and once in every 3
months as per IS code


2. SAND
Tests to be conducted
a. Particle size - Lab
b. Silt content - Field
c. Bulking of sand-Field
d. Percentage of Deleterious material / Organic impurities - lab
Is code for material - IS-383-1970
IS code for testing - IS-2386 (Part I) to IS-2386 (Part VIII)


Periodicity of testing
Whenever there is a change in source of supply or as directed by the
Engineer-in-Charge.
Remarks
1. Silt content should not exceed 8%.
2. For sand pad foundation no need of particle size distribution. Only silt &
   bulk content to be carried out.


Sand (for plastering)
Tests to be conducted
a) Particle size - Lab
b) Silt content - Field
c) Percentage of Deleterious /organic impurities - Lab.
IS code for material - IS-1542
IS code for testing - IS-1727
Periodicity of testing
Same as above, Test shall be repeated for Minimum qty. 500 sq. m of
plastering.
Remarks
1. Silt content not to exceed 5%
2. Sand to be sieved in sieve size 4.75 mm


3. COARSE AGGREGATE
Tests to be conducted
a. Percentage of Soft deleterious materials- Field (Visual)
b. Particle size distribution
c. Aggregate value :
1. Crushing - Lab
2. Impact - Lab
3. Abrasion - Lab (Only for Roads)
IS code for material - IS-383-1970
IS code for testing - IS-2386 (Part I) to IS 2386 (Part VIII)


Periodicity of Testing
Minimum 45 cum. Tests to be repeated for every 45 cum of coarse
aggregate or part thereof.
Remarks
Percentage of soft deleterious materials. Usually visual inspection shall be
carried out. If Engg.-in-Charge / Architects has doubts, the same may be
tested in Lab.


4. CEMENT
Tests to be conducted
a. fineness - Lab
b. Soundness - Lab
c. Setting Time - Lab
d. Compressive strength - Lab


Periodicity of Testing
Minimum qty. 20 MT, Tests to be repeated for every 50 MT or part thereof
or change of supplier.
Remarks
Cement to be tested if supplied by the contractor. Cement to be tested if
stored for more than 3 months.
5. CEMENT CONCRETE
Tests to be conducted
a. Slump test - Field
b. Cube strength - Lab/field


Periodicity of Testing
a. Once for minimum 5 cum.
b. Minimum 15 cum of part thereof.
Remarks
Cube strength to be taken for both 7 days as well as 28 days. Cubes of
critical members (decided by Engg.-in-Charge) shall be tested at lab.


6. REINFORCEMENT STEEL
Tests to be conducted
a. Free from defects - Field (Visual)
b. Weight - Lab
c. Size - Lab
d. Ultimate tensile stress - Lab
e. Yield stress - Lab
f. Elongation percentage - Lab
g. Bend Re-bend test - Lab
IS code for material
 IS-432 for mild steel
 IS-1786 for Tor steel
IS code for testing - IS-1608


Periodicity of Testing
Minimum qty. 10 MT, tests shall be repeated for every 10 MT of each size
(dia) or part thereof.
Remarks
a. Steel shall be tested if supplied by contractor.
b. Steel shall be tested if stored in open yard for more than one year.
NOTE : All the testing equipments/ machines like Sieve, Compression
testing machine etc. required for field tests shall be arranged by the
party at site. In case of failure of machine, testing to be carried out by the
Contractor at lab at no extra cost

7. BRICKS
Tests to be conducted
a. Compressive Test - Lab
b. Water absorption - Lab
c. Efflorescence - Lab
d. Percentage of Deleterious material - Lab.
e. Dimension test-Lab
IS code for material - IS-1077-1986
IS code for Testing - IS-3495 (Part I) to IS-3495 (Part III)

Periodicity of Testing
Minimum 20000 bricks but tests shall be repeated for every 40000 or part
thereof depending on the volume of work.


8.0 TILES
Tests to be conducted
Tolerance in size (+/- 1 mm on length & breadth)
Thickness of wearing layer – Lab
Water absorption – Lab
Transverse Strength – Lab
Abrasion Strength - Lab
IS Code for testing as per standard
Periodicty of testing
2 sample tiles to be tested for minimum quantity of 80 Sqm

				
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