Clayboard void former technical specification
Clayboard 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.
Examples of Clayboard® thickness required
Compressive strength
Clayboard® is available in two standard strengths, KN30 and
KN90. KN30 has a nominal 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 and Safety for our void fillers
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 user's 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.
Voidpak System
With your Clayboard® delivery, we can also supply the Voidpak
System which comprises:
Pipes
Preshaped 32mm diameter pipes cut 600mm long with a fixed flange
positioned to suit depth of Clayboard. These can be cut to suit
slab depth on site.
Caps
End caps for each pipe.
Lay Flat Tubing
To allow Clayboard® to be installed in wet conditions we can
pre-wrap the Clayboard® panels in clear polyethene tubing to
prevent water affecting the honeycomb core prior to the concrete
slab having set.
Waterproof tape
50mm wide in 66m rolls.
Bearers for remote site delivery
Bearers for remote site delivery. This allows for the clayboard
packs to be unloaded using a folklift truck. The Clayboard is so
light the packs are designed to be unloaded by hand by two people.
However if this is not possible the bearers ensure a folklift can
get under the pack to lift it.
