BEWI GHP - Ground Heave Protection
Verified by manufacturer 2 months ago
Insulation slab
Insulation slab
BBA Agrément Certificate
Certificate type
A range of EPS cellular void formers used to limit the pressure exerted on in-situ reinforced concrete floors or piled ground beams by the expansion of clay soils, (clay heave), or ground recovery.
Application
- BEWI Ground Heave Protection provides a stable platform to support a specified depth of wet concrete during construction.
- Suitable for use beneath beams and slabs.
Description
The BEWI Ground Heave Protection boards are a cellular-structured void formers cut from expanded polystyrene (EPS). The boards are manufactured in a range of thicknesses to meet the application – Beam, Slab or Insulated Slab - requirement and the soil plasticity and predicted ground movement on the site. All BEWI Ground Heave Protection boards are supplied with a bonded polypropylene top and bottom sheet.
Features and benefits:
- Protects a buildings ground beams and or in-situ suspended reinforced piled floor slabs against the upward pressure caused by ground heave.
- BBA-certified.
- Meets NHBC Technical Standards.
- Board sizes aid a fast, easy installation.
- Bonded bottom sheet removes need for sand/ cement blinding layer.
- Available with bonded EPS insulation board.
- Lightweight boards limit H&S risk on site.
General information
Color | White Black Grey |
Material | Expanded polystyrene (EPS) Polypropylene |
Shape | Square Rectangle |
Length | 1200 mm |
Width | 1200 mm 300 mm 450 mm 600 mm |
Height | 82 mm 85 mm 90 mm 152 mm 155 mm Manufacturer guidanceDepth of cellular EPS structure. |
Uniclass | |
CAWS | E20/45 Collapsible board substructure formwork E20/182 Collapsible board substructure formwork |
Specification data - Compressible board substructure formwork
Third-party certification | BBA Agrément certificate. |
Material | Expanded polystyrene (EPS) and polypropylene. |
Thickness | 82 mm + insulation thickness.152 mm + insulation thickness.217 mm + insulation thickness.Manufacturer guidanceDepth of cellular EPS structure. The boards are manufactured in a range of thicknesses to meet the application requirement and the soil plasticity and predicted ground movement on the site. See Ground Heave Protection Technical Data Sheet, table 1. |
Dimensions | 1200 x 1200 mm. |
Grade depth options | Product grade 1. Guidance for specification option: Safe-load 7 kN/m², fail-load 10 kN/m². 100–220 mm concrete thickness. Product grade 2. Guidance for specification option: Safe-load 9 kN/m², fail-load 13 kN/m². 221–300 mm concrete thickness. prodcut grade 3. Guidance for specification option: Safe-load 10 kN/m², fail-load 15 kN/m². 301–340 mm concrete thickness. Product grade 4. Guidance for specification option: Safe-load 13 kN/m², fail-load 18 kN/m². 341–460 mm concrete thickness. Product grade 5. Guidance for specification option: Safe-load 18 kN/m², fail-load 24 kN/m². 461–660 mm concrete thickness. |
Insulation | 30 mm. 50 mm. 50 mm. 75 mm. 100 mm. Manufacturer guidanceThe insulation layer can be any thickness to meet project U-value requirements. |
Colour | White (70). Grey (70HP). Manufacturer guidanceInsulation boards are available in white EPS, or for enhanced thermal performance, grey HP EPS can be supplied. |
Sustainability data
Material | Expanded polystyrene (EPS) Polypropylene |
Third party certifications
BBA Agrément Certificate
BBA Certificate - Heave Protection