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Soil Testing Compaction and CBR Compaction Test 25 kg Compaction

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Soil Testing Compaction and CBR Compaction Test 25 kg Compaction

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									     24         Soil Testing
                Compaction and CBR


  Dry Density/Moisture Relationship                                 Compaction Test 4.5 kg
  BS/EN DD ENV                                                      BS 1377-4, 1924-2, EN DD ENV 1997-2

Compaction Test 2.5 kg                                              This test method utilises a 4.5 kg hand rammer resulting in a
                                                                    heavier compactive effort than the 2.5 kg test method.
BS 1377-4, 1924-2, EN DD ENV 1997-2                                 Compactive energy some 4.5 times greater is applied to the
                                                                    sample using the heavier rammer.
This test method utilises a 2.5 kg hand compaction hammer
and a one litre capacity compaction mould.                          The method is often specified where higher levels of
                                                                    compaction are necessary in a structure, e.g. an airfield sub-
Often referred to as the 'Proctor' test it is suitable for soils    base material.
containing particles no larger than 20mm.
                                                                    Manufactured from corrosion protected steel components
The mould and hammer is manufactured from corrosion                 the 4.5 kg rammer is designed to withstand heavy usage
protected steel components to withstand the heavy usage             involved in the test method.
involved in the test.

Compaction Mould, BS                                                Compaction Rammer, 4.5 kg                          BS

Specification                                                       Specification
Mould volume     1 litre                                            Rammer           50 mm dia, 4.5 kg
Construction     All steel, threaded studs with wing nuts, plated   Drop             450 mm
Weight           5.5 kg                                             Guide sleeve     Machined steel tubing with air pressure
                                                                                     release holes
Ordering Information                                                Finish           Corrosion resistant
EL24-9000                                                           Weight           7.5 kg
Standard Compaction Mould BS
                                                                    Ordering Information
Compaction Rammer, 2.5 kg                            BS             EL24-9004
                                                                    Compaction Rammer 4.5 kg BS
Specification
Rammer            50 mm dia, 2.5 kg                                 Accessories
Drop              300 mm                                            EL24-9010            Straightedge, 300 mm Weight 600 g
Guide sleeve      Machined steel tubing with air pressure           EL24-9025            Tamping Foot 146 mm dia and
                  release holes                                                          300 mm long Shank
Finish            Corrosion resistant
Weight            4.2 kg
                                                                          Dry Density
                                                                          Moisture Content Relationship for
Ordering Information                                                      Soils
EL24-9002
Compaction Rammer 2.5 kg BS



BS Compaction Mould and Rammers




22
                                                                                           Soil Testing
                                                                                    Compaction and CBR                  24
  Dry Density/Moisture Relationship                                ASTM Compaction Mould
  ASTM                                                             ASTM D698, D1557; AASHTO T99,T180
                                                                   Specification
Proctor Compaction Mould                                                           1
ASTM D558, D559, D560, D698, D1557;                                Mould volume     /13.33 ft3
AASHTO T99,T134,T135,T136,T180                                     Construction    All steel, threaded studs with wing nuts, plated
                                                                   Weight          8.2 kg
Specification
Mould volume    1
                 /30 ft3                                           Ordering Information
Construction    All steel, threaded studs with wing nuts, plated   EL24-9066
Weight          5.4 kg                                             ASTM Compaction Mould


Ordering Information
                                                                   ASTM Compaction Rammer
EL24-9060                                                          ASTM D1557; AASHTO T180
Proctor Compaction Mould
                                                                   Specification
Proctor Compaction Rammer                                          Rammer              2 in diameter, 10 lb
ASTM D558, D559, D560, D698; AASHTO T99,                           Drop                18 in
T134,T135,T136                                                     Guide sleeve        Machined steel tubing with air pressure
Specification                                                                          release holes
                                                                   Finish              Corrosion resistant
Rammer              2 in dia, 5.5 lb
                                                                   Weight              6.3 kg
Drop                12 in
Guide sleeve        Machined steel tubing with air pressure        Ordering Information
                    release holes
Finish              Corrosion resistant                            EL24-9070
                                                                   ASTM Compaction Rammer
Weight              4.1 kg

Ordering Information
EL24-9063
Proctor Compaction Rammer                                          EL24-9066 ASTM Compaction Mould

Accessories
                       Straightedge, 300 mm
                                          see EL24-9010

EL24-9060 Proctor Mould and EL24-9063 Compaction Rammer




                                                                                                                                      23
     24         Soil Testing
                Compaction and CBR



  Automatic Compaction of Soils

The time and effort required to prepare specimens for
compaction studies and other test methods can often be
costly and time-consuming.The use of an automatic,
mechanical compactor will show considerable cost benefits
over hand compaction methods.Two models meeting the
requirements of BS and ASTM are available..

Automatic Compactor
BS1377, EN DD ENV 1997-2, 1924; ASTM D558, D560,
D698, D1557; AASHTO T99,T134,T135,T136,T180

s Pre-set blow pattern ensures even compaction
s Solid state controls for reliability and ease of
  maintenance
s Automatic re-setting of counter after completion
  of blow pattern
These machines automatically compact specimens eliminating the
laborious hand compaction method.The height and weight of the
rammer is adjustable to suit test requirements.

An automatic blow pattern ensures optimum compaction for each
layer of soil.The rammer travels across the mould and the table
rotates the mould in equal steps on a base that is extremely stable.
The number of blows per layer can be set at the beginning of the
test.

Specification
Dimensions (l x w x h)  430 x 250 x 1400 mm                             EL24-9090 series Automatic Soil Compactor with accessory Mould

Rammer           BS/ENV Circular faced, 50 mm dia, adjustable to        Ordering Information
                        2.5 kg or 4.5 kg weight
                 ASTM Circular faced, 2 in (50.8 mm) dia,               EL24-9095 series
                        adjustable to 5.5 lb (2.5 kg) or                Automatic Soil Compactor, ASTM
                        10 lb (4.5 kg) weight                           EL24-9095/01 for 220 – 240 V AC, 50 Hz, 1ph
                                                                        EL24-9095/02 for 110 – 120 V AC, 60 Hz, 1ph
Drop             BS/ENV Adjustable to 300 mm or 450 mm
                 ASTM Adjustable to 12 in (305 mm) or
                        18 in (457 mm)                                  Accessories
Weight                  98 kg                                                                    Proctor Compaction Mould
                                                                                                                  see EL24-9060
Ordering Information                                                                             ASTM Compaction Mould
EL24-9090/01                                                                                                     see EL24-9066
Automatic Soil Compactor, BS/ENV
For 220 – 240 V AC, 50 Hz, 1ph

Accessories
                       Standard Compaction Mould
                                        see EL24-9000
                       BS CBR Mould Body
                                       see EL24-9198
                       BS CBR Extension Collar
                                        see EL24-9200
                       BS CBR Solid Base see EL24-9204




                         Rammer mechanism of Automatic Soil Compactor


24
                                                                                                     Soil Testing
                                                                                              Compaction and CBR    24
    Moisture Condition Value (MCV) and
    Chalk Crushing Value (CCV)
Both these tests incorporate a Moisture Condition
Apparatus.The MCV is a measure of the minimum
compactive effort required to produce near full compaction
of a soil.The CCV measures the rate at which a sample of
chalk lumps are crushed. Used with the saturated moisture
content of chalk, CCV can be used to classify chalk as a fill
material.

Moisture Condition Apparatus
BS 1377, EN 13286-46

s   TRL approved
s   Improved design
s   Simple portable apparatus
s   Automatic blow count
The original Moisture Condition Apparatus was developed by the
Transport Research Laboratory, England. ELE has redesigned the
equipment to give improvements in terms of strength and
reliability, particularly under site conditions.The ELE model is TRL
approved and is used in construction control to assess the
suitability of earthwork material in relation to the specified upper
limits of moisture content. In a second mode of operation, it
determines a ‘chalk crushing value’ for use in classification of chalk
as a fill material.

To assess the suitability of earthwork material a ‘moisture condition
value’ is determined. The test is based on the determination of the
minimum number of blows of the rammer required to produce a
state of full compaction in a sample of soil. After calibration over a
range of moisture contents the suitability of earthwork material
can be assessed without the measurement of the moisture content
of the soil with its associated delays.The chalk crushing value is
determined from the rate at which a sample of single-sized chalk
lumps (passing 20 mm and retained on a 10 mm BS sieve) is
crushed under the impact of the rammer.The chalk crushing value,
taken together with the value of the saturation moisture content of
lumps of the chalk, gives a classification in terms of the likely
behaviour of the chalk during construction.

Operation of the apparatus is extremely simple.The rammer is
lifted, when it reaches the top of its travel, a striker attached to the
cross member releases the automatic catch allowing the rammer              EL24-9135 Moisture Condition Apparatus
to fall.The rammer has a scale for measurement of penetration
into the mould. After each blow, the height of drop can be reset
and checked by means of the vernier gauge supplied.To record the
number of blows, a counter is fitted to the release mechanism.


Ordering Information
EL24-9135
ELE-Moisture Condition Apparatus
The apparatus is supplied complete with vernier caliper, mould, 6
fibre discs, operating instructions and standard forms for
determining Moisture Condition Value and Chalk Crushing Value.
Dimensions 300 x 630 x 950 mm (l x w x h).
Weight 60 kg




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