Dufaylite Clayboard

Clayboard is unique, environmentally friendly void former and foundation stabiliser developed by Dufaylite. Clayboard is a biodegradable honeycomb core set between lightweight polypropylene facings.

When dry, Clayboard is strong enough to support the weight of wet concrete and Steel reinforcement.

Water is introduced to the Clayboard core once the concrete is set, degrading the Clayboard honeycomb centre which will ultimately lead to the creation of a void. This space will accomodate clay expansion without exerting undue pressure on the structure below.

The resulting void continues to accomodate natural soil shrinkage and expansion.

Helps prevent structural building damage caused by clayheave

Suitable for all types of structure including residential, industrial and Commercial Buildings

Up to 50% slimmer than other systems saving on soil excavation and removal

Exerts no undue pressure on ground slabs preserving building integrity

Strong enough to support poured concrete

Unique honeycomb core creates calculable void without compression

Kind to the environment

Slimness of product is ideal for retrofit Underpinning

Easy to cut and install

Cost effective



Sizes

Clayboard is supplied in panels 2440mm long by 1000mm wide, by the specified thickness. Clayboard is delivered to site on lightweight pads for easy unloading, and is polythene wrapped for protection.



Thickness

The thickness of Clayboard depends on the depth of the required void which should be specified by the soil engineers taking into account the plasticity index.

Compressive Strength

Clayboard is available in two standard strengths, KN30 and KN90. KN30 has a norminal compressive strength of 30kN/m2 when dry and is designed to support the weight of wet concrete up to 1m thick. KN90 has a nominal compressive strength of 90kN/m2 when dry and is recommended for concrete slabs thicker than 1m.

When the core is wetted, both KN30 and KN90 Clayboard will collapse under nominal compressive load of approximately 3kN/m2.

Health & Safety

The materials used in Clayboard do not constitute a risk to the Health and Safety of users in the course of site application in the recommended manner. It is the users responsibility to adopt relevant safe practices when handling, stacking, cutting and installing Clayboard panels. Clayboard panels are safe to handle with no dust and no harmful emissions.