Cellvent HX combines the benefits of the Cellcore HX range with Ventform to alleviate the effects of ground heave whilst also providing an excellent gas venting medium. It is designed for use under suitably reinforced ground floor slabs where subsidence is not expected.
Cellvent HX is available in a range of specifications to accommodate the ground conditions of any particular project and can be used in conjunction with Cordek gas membranes, vent outlets and venting accessories to form a complete gas protection system.
Designed for use beneath reinforced concrete floor slabs to provide a combined ground heave protection and passive gas venting system.
The tables below provide guidance for determining the most appropriate depth and grade of Cellvent HX panel, based upon the characteristics of the expansive soil type and the proposed thickness of the reinforced concrete slab:
The depths available are:
|Soil Plasticity Index||NHBC Shrinkage Category||Maximum Heave Potential (mm)||Cellvent HX Product Depth (mm)||Equivalent Cellcore HXS Depth (mm)|
The grade of Cellvent HX is determined by the depth of the concrete slab:
|Cellvent HX Grade||Maximum Safe Load (inc. 1.5kN/m2 live load)||Fail Load (kN/m2)
||Maximum Depth of concrete (mm)|
Based on the above tables, the Cellvent HX specification for a 250mm thick concrete slab on top of medium shrinkability clay would be: Cellvent 205 HX 9/13.
Cellvent HX is supplied with an equivalent ventilation capacity to the Ventform 80 range which includes a 40mm void depth. If a greater venting capacity is required, please contact the Cordek Technical Team on 01403 799600 for further guidance.