60mm Heave Stopper Clay Heave Protection Board (Ground Heave Solution) is an alternative construction void former to Dufaylite’s Clayboard and Cordek Cellcore that is suitable for Ground Beams and Slabs to protect foundations.

Heave Stopper 60mm is a BBA approved 2400mm x 1200mm honeycomb board used to create a void underneath the foundation for ultimate stability in ground liable to ground heave.

Ground beams, slabs and concrete foundations can be subject to cracking as a result of the forces of ground movement when built on areas of shrinkable soil.

Heave Stopper Collapsible Void Former is an eco-friendly, recycled construction material with maximum strength of 120kn/m2, that protects against ground movement whilst laying concrete foundations.

When the honeycomb core is introduced to water it is designed to lose its strength in order to permit ground heave without transmitting pressure to the foundations or structures above.

Heave Stopper 120kn/m2 is calculated and calibrated for concrete thickness up to 1000mm (the slimmest method of void creation means less excavation, muck away, vehicle movements and landfill).

The structural damage caused by clay is acknowledged by engineers and designers all over the world.

In the UK the problem is particularly acute in the South East, although climate change is having its effect on soils in other parts of the country.

Heave Stopper can also be used horizontally and vertically to create a void to protect structures from vibration.

Clay Heave Protection Board Heave Stopper is an easy to install and simple to work with and doesn't have much dust off when cut on site.

Shrinkage potential of HS060 (Heave Stopper 60mm) is classified as low with RED colour code and plasticity index between 10-20.

Specification:

Thickness: 60mm

Length: 2400mm

Width: 1200mm 

Board Coverage: 2.88m2

Strength: up to 120kn/m2

Heave Stopper Features:

 · BBA Approved.

 · Easy to install.

 · FSC Approved.

 · Ideal for sites with restricted access.

 · Suitable for Ground Beams and Slabs.

 · Alternative to Dufaylite Clayboard.

 · Meets the technical requirements of the NHBC.

 · Alternative to Cordek Cellcore HX S Under Slab.

 · Lowest possible forces transmitted to the structure.

 · Alternative to Cordek Cellcore HX B Under Beam.

 · The slimmest method of void creation means less excavation.

 · Environmentally friendly, core facings manufactured from 100% recycled materials.

 · A perfect solution for contaminated land and brownfield sites.

Heave Stopper Storage:

The boards must be kept dry, stored off the ground and on the delivery pallets to prevent any moisture ingress whilst in storage.

Stacked pallets must not exceed 2 high.

The protective cover must not be removed until ready for use.

Heave Stopper Installation:

Ensure that the area is free of surface water.

Heave Stopper must not be placed in waterlogged ground.

Lay a sand, shingle or concrete blinding to provide a level bed for the boards to rest on with no pressure points to the underside.

Lay minimum 125mu (500 gauge) polythene the full width of the excavation and tape all joints.

Pay attention to detailing around pile penetrations and corners to ensure a watertight seal.

Good practice requires that enough polythene is laid to fold over the Heave Stopper boards to lap with the top layer of polythene.

Position Heave Stopper boards.

Fold over the polythene from the bottom layer to the top face of the Heave Stopper boards and tape all joints.

Make provision to introduce water into the Heave Stopper boards by way of the Void Pipe.

A Void Pipe is required every 25m2 or for every isolated area of Heave Stopper.

Tie the Void Pipe to adjacent reinforcement to hold upright during concrete pour.

Pour concrete and allow enough time to elapse for the concrete to become self supporting.

Introduce water into the Heave Stopper boards by inserting a hose pipe into the Void Pipe.

Flood with enough water to ensure total saturation of the Heave Stopper.

Once the saturation process is complete, strike through the bottom facing and polythene to allow the water to drain.

Pipe sections can now be sealed off with cement or sealant.

*Further information may be found in our Downloads section.

Fairly easy access to all PDF files.

Datasheet ǀ Declaration of Performance - DoP ǀ BBA Certificate ǀ Installation Guide ǀ Certificates ǀ Brochure ǀ SPEC Sheet

For more information:

HONEYCOMB VOID FORMER INSTALLATION GUIDE