Hebel Vertical Wall Panel Spec

Document Sample
Hebel Vertical Wall Panel Spec Powered By Docstoc
					      CSR HEBEL AUTOCLAVED AERATED CONCRETE PANELS
1.    GENERAL

1.1   DOCUMENTS
      Documents generally relating to in this section are:

      NZS 3103            Sands for mortars and plasters
      NZS 3109            Concrete construction

      There are no New Zealand Standards that relate to Autoclaved Aerated Concrete (AAC)
      specifically.

1.2   MANUFACTURER’S DOCUMENTS
      Manufacturers’ and supplier’s documents relating to work in this section are:
      CSR Hebel Technical Handbook.
      CSR Hebel Load-bearing Wall Panel System.

      Copies of the manufacturers literature are available by phoning Lightweight Concrete NZ
      Ltd~ (03) 455 1502

1.3   QUALIFICATIONS
      Carry out all installation of the precast concrete panels with people competent and
      experienced in this type of work, No specific AAC qualifications are required, however the
      contractors shall have had instruction and training from Trained Hebel Instructors and/ or
      other experienced Hebel installers. All personnel operating cranes shall hold the
      appropriate certification.

1.4   INSPECTION
      Call for inspection of the work at critical stages including set out of reinforcing starters,
      completion of panel and reinforcing placement at the time prior to and during grouting.
      The design engineer or his nominated representative will certify that the steelwork is
      placed in accordance with the design.

2.    PRODUCTS

2.1   WALL PANELS
      Brand:                            ~CSR HEBEL
      Width:                            ~varies - 600mm maximum, 300mm minimum
      Thickness                         ~150mm generally (125, 175, 200, 225 & 250m available)
      Edge Profile                      ~Semicircular core forming groove 50-60mm diameter


2.2   VERTICAL REINFORCEMENT TIE RODS
      M12 zincalume coated threaded rod in 3000mm lengths with separate 300mm starters
      and connector sleeve nuts all supplied with Hebel Supply kit including Hilti HY150 or
      Powers C100 injection adhesive for adhering starters into footings. Alternatively, D12
      Reidbar or D12 steel reinforcing

2.3   THICK BED MORTAR (FOR BASE LEVELING ONLY)
      Use the Brighton Drymix pre-batched mortar supplied as part of the Hebel supply
      contract. If extra site mixed mortar is needed use a 6:1:1 mix (sand to NZS 3103).
      Chloride levels to not exceed 0.04% by dry weight of sand. Compressive strength shall be
      not less than 12.5 Mpa. Mortar is for levelling any slab irregularities. All other joints are
      glued with Thin Bed Adhesive supplied with Hebel components.

2.4   GROUT TO TIE ROD HOLES
      Sand /cement mix. Spread value 450 - 530mm.
      Design strength- 15 MPa at 28 days. This grout is used to fill the holes around the vertical
      tie-down rods only:




                                                          Hebel Autoclaved Aerated Concrete Panels Page 1
2.5   WATER
      Clean, fresh and free from excess alkali, salt, silt and organic materials. Water from a
      local authority water supply is acceptable.

2.6   DAMPPROOFING
      Any Hebel Wall Panels seated upon conventional concrete must have a Bituminous damp
      proof course membrane, such as Bitumac Malthoid DPC placed between the two types of
      concrete to act as a slip joint and allow for differential movement, including drying
      shrinkage. Lay the DPC over the foundation, to the perimeter and along the lines of all
      internal walls. Neatly cut around all starters. The DPC creates a slip joint and also
      provides a moisture barrier to protect the Hebel panels from dampness. As such, the roll
      of DPC should be the same width as the wall thickness.

3.    EXECUTION

3.1   STORAGE
      Store all panels clear of the ground, under cover (plastic wrapping) and well ventilated
      until placed in the work.

3.2   MOISTURE CONTENT
      Ensure that the Hebel Panels are air dry prior to placing. Excessive moisture at the joints
      may not allow the adhesive to bond correctly.

3.3   CHECK BASE CONCRETE
      Ensure the base concrete is true to line and level, requiring a base mortar bed of 10mm
      (minimum) to 20mm (maximum). The Thick Bed Mortar is laid over the DPC and is used
      to level the first run of panels.

3.4   STARTER POSITIONS FOR WALL PANELS
      The 12mm threaded rod starters are positioned by the Engineer on the plan at 600mm
      centres to align with the panel joints. Ensure that the pattern of rod set-out is strictly
      adhered to. Do not correct misplacement by cranking bars. Where misplacement drill and
      adhere new starters in the correct location. Each starter should protrude from the slab a
      minimum of 100mm. Long starters may interfere with panel placement, so a maximum of
      200mm above slab is advised. Fit sleeve nut to protect the thread during construction.

      Each shall be fitted with a sleeve nut to allow the connection of the vertical tie down rods.
      Protect the nut by taping over it to prevent adhesive overspill from clogging the thread. As
      each wall panel is installed, insert long lengths of threaded rod (supplied) into sleeve nut.

      Grout the rods in place (see Grout section notes). For external walls, the top of the wall is
      capped with a perimeter bond beam. As part of the ring anchor system of the floor above
      (See bond beam details). Tie the bond beam longitudinal steel (not supplied by Hebel) to
      the vertical tie rods.

      Internal walls will have a perforated steel top plate instead of a bond beam.

3.5   COVER
      Vertical tie down rods should be located centrally within the wall or as detailed by the
      engineer

3.6   TOLERANCES
      Refer to Engineers notes for acceptable dimensional tolerances

3.7    JOINT CLEANING
      After each Panel is placed, run the trowel across the joint to remove any adhesive that
      has overspilled or been squeezed out. At the end of each day scrape the wall down to
      remove any small droppings of adhesive. Left to cure overnight, these will prove more
      difficult to remove the next day. Keep the Wall Panels as clean as possible (a little
      overspill is acceptable and shows that the Panel joint surfaces have full adhesion – a
      perfectly clean joint surface indicates insufficient adhesive use and therefore less wall
      strength)



                                                        Hebel Autoclaved Aerated Concrete Panels Page 2
3.8    PANEL LIFTING AND PLACING
       Vertical wall panels are lifted and placed using a simple pin lifter. Instruction in the use of
       these attachments will be provided by the Hebel panel supplier.

3.9    ADHESIVE TO JOINTS
       Not exceeding 2-3mm thick. The teeth of the trowel will spread the adhesive to the
       appropriate depth.

3.10   CONTROL JOINTS
       Locate where shown on the drawings. If not indicated, they should be at not more than 6
       metre centres. Where bond beam reinforcement passes through a control joint, provide
       for breaking of the bond to the steel, unless specifically detailed otherwise. Place a foam
       backing rod & flexible sealant into the joint. Joint width should be 10mm

3.11   BRACING
       Temporary propping of the wall is necessary. The wall bracing is achieved when the
       vertical tie down is installed, grouted in place and connected to the top bond beam, floor
       diaphragm, or steel top plate connector. The Contractor shall provide sufficient temporary
       lateral bracing to ensure stability until the final supporting construction is in place. Brace
       the wall with adjustable acro-prop, or similar, every fourth panel. Clamp each panel to the
       next with sections of steel purlin channel fitted snugly over the top of the join. These will
       need holes drlled in them to allow for core grout filling

3.12   PRE-GROUTING INSPECTION
       Inspect walls prior to grouting. Ensure holes have been cleared of all Hebel debris and
       that grout can flow freely around the tie down rods

3.13    GROUTING OF VERTICAL CORES TO WALL PANELS
       Use a free flowing sand/cement grout. Grout all holes, shaking the reinforcing as it is
       grouted to ensure complete filling of the drilled cavity. Drill bleeder holes at regular
       intervals up the first core to be poured. Plug each bleeder hole as the grout fill reaches
       that level. This ensures that the hole is verifiably filled. By measuring the quantity of grout
       required for this core, all other cores can confidently be filled using exactly the same
       amount (without the need for bleeder holes to every core).

3.15   ADHERE ON COMPONENTS
       Use Thin Bed Adhesive to attach any Hebel components such as sills, parapet capping,
       window surrounds and decorative feature work. Until the adhesive sets it may be
       necessary to nail the item in place.

3.16   REMOVAL OF MATERIALS
       Remove from the site materials not used. Excess stock delivered to the site belongs to
       the Hebel supplier as per the supply contract. Dispose of all cut & damaged panel and
       block.




                                                           Hebel Autoclaved Aerated Concrete Panels Page 3

				
DOCUMENT INFO
Shared By:
Categories:
Stats:
views:61
posted:6/2/2010
language:English
pages:3