Cellcore HX S is designed for use beneath reinforced concrete floor slabs to protect against the potential effects of ground heave. The product consists of a cellular construction of Expanded Polystyrene which has been designed, moulded and tested to tight tolerances to achieve the specified performance characteristics.
The standard range of products are available in a variety of depths and grades to suit most commonly encountered combinations of soil heave potential and concrete depth. Variations of the product are also available for use under pile caps and ground beams or alternatively where integral insulation, permanent formwork or passive gas venting is required.
The Cellcore HX S range is designed to protect reinforced concrete floor slabs from the upward forces associated with the effects of ground heave.
Firstly the depth of the Cellcore HX S panel should be determined by the heave potential of the soil, as detailed in table one below:
|Results of Soil Analysis||NHBC Category||
Predicted Ground Movement or BRE/NHBC requirement
|Depth of Cellcore HX required to achieve 'Equivalent Void'|
|Plasticity Index||Shrinkage Category||Void Dimension (mm)||HX S (mm)|
|Cellcore HX Grade *||Safe Load (kN/m2)||Fail Load (kN/m2)||Maximum Concrete Depth ** (mm)|
* For easy identification the panel labels are coloured as shown.
** Based on the Eurocode and a live load allowance of 1.5kN/m2.
For concrete thicknesses between 900mm and 2000mm, further grades of Cellcore are available. For further advice please contact the Cordek Technical Team on 01403 799600.