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BEWI GHP - Ground Heave Protection

Verified by manufacturer 2 months ago

Beam

BEWI UK Insulation Variant:
Third party certifications:
  • BBA Agrément Certificate

    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.

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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

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Manufacturer guidance

Depth of cellular EPS structure.

Uniclass

Pr_25_71_29_16 Compressible board substructure formworkPrimary

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

85 mm.

155 mm.

220 mm.

Manufacturer guidance

Depth 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

300 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.

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Sustainability data

Material

Expanded polystyrene (EPS)

Polypropylene

Third party certifications

BBA Agrément Certificate

BBA Agrément Certificate

BBA Certificate - Heave Protection

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