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2 3.4 The thickness of the product is then established by (see Figure 1): (1) finding the value of the compressive strain (C %) from Graph 1 (using design value for P or W — see section 3.3), and (2) calculating the thickness of the product required (T mm) from the formula: T = 100 H + 10 C Figure 1 Determination of thickness required Claymaster thickness T predicted maximum clay heave H (mm) T = 100 H + 10 C compressed thickness of load P or 2 W (kN·m ) compressive strain 4 Practicability of installation The product is designed to be installed by a contractor experienced with this type of product. It is usual practice to have the Certificate holder’s specialists on site to supervise the installation (see section 8). 5 Resistance to pressure 5.1 The pressure transmitted/strain relationship of Claymaster Compressible Fill is given in Graph 1, which is based on a strain rate of 2% per day. Graph 1 Relationship of pressure to compressive strain allowable transmitted pressure P or W (kN·m ) 40 30 20 10 10 20 30 40 50 compressive strain C (%) 5.2 The product must not be used where the depth of in-situ concrete is greater than 600 mm in a single pour. 6 Maintenance As the product is confined below concrete groundbeams and it has suitable durability (see section 7), maintenance is not required. 7 Durability The product is dimensionally stable under varying conditions of temperature and humidity. It is rot-proof and water resistant and will remain effective as a compressible fill for the life of the building. Page 4 of 8
Installation 8 Supervision 8.1 If required, the Certificate holder’s specialists, experienced in site practice and installation of the material, will attend the site to provide demonstrations to ensure correct installation. 8.2 Adequate supervision of the installation must be maintained and the Certificate holder’s specialists must have right of access to the site to ensure their product is being installed correctly. 9 Procedure Under groundbeams and pile caps in piled construction (see Figure 2) Figure 2 Detail of pile and groundbeam suspended concrete floor void between floor and subsoil backfill ground level reinforced concrete groundbeam or pipe cap Claymaster slip layer may not be necessary in all designs pile 9.1 The trenches are excavated as normal, but taking account of the required thickness of the product. 9.2 The bottom of the excavation must be flat, even and properly compacted. In certain situations, this may require blinding the trench bottom with concrete or granular material. 9.3 The product is laid closely butted on the prepared excavation, ensuring that the whole area of the groundbeam is covered. Small gaps between boards must be backfilled with as-dug or granular material. 9.4 Where concrete piles protrude into the trench, the product boards should be cut to suit with a fine-toothed saw. 9.5 Sufficient concrete spacing blocks must be used to ensure that the correct depth of concrete cover to the reinforcement is achieved. The quantity and type of spacers must ensure that the load transmitted to the product does not exceed 15 kN·m –2 , to prevent penetration into the product (typically 75 mm by 75 mm blocks at 500 mm centres). Page 5 of 8
Page 1 and 2: Vencel Resil Ltd Infinity House And
Page 3: Technical Specification 1 Descripti
Page 7 and 8: Technical Investigations 10 Tests A

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