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Application

Suitable for use in commercial and housing projects. Can be used to construct internal walls in commercial, industrial and leisure buildings. The blocks can be used for the following:

  • The inner and outer leaves of external cavity walls.
  • Internal walls including fire break walls.
  • Separating walls including those conforming to Robust Detail specifications.
  • External and internal walls below ground (3.6 N/mm² blocks can be used in both inner leaf and internal walls; 7.3 N/mm² blocks to other locations).
  • Infill units to beam and block flooring.

The blocks can accommodate drylining, dense plaster, finishing coats and external rendering. Consult manufacturer for further finish recommendations.

Description

Medium density, load bearing concrete blocks, suitable for facing and general purpose applications. The blocks consist of a specially formulated mix which reduces density, producing a solid block under 20 kg unit weight.

The blocks are medium grey in colour with a fine textured/ scratched surface, providing an enhanced key for plastering and rendering. Available in 100 and 140 mm widths, solid form only.

Features and benefits:

  • Robust and durable.
  • Good surface key for the direct application of plasters and renders.
  • For use internally and externally, above and below ground.
  • High levels of air tightness, sound insulation and fire resistance.
  • Provides a strong background for holding fixings.
  • Over one-third of the materials come from sustainable sources.
  • Credits available under BREAAM and Code for Sustainable Homes.
  • CE marked to BS EN 771-3.
  • Can be used to satisfy the requirements of Part L of the Building Regulations.

The mortar type for work above ground level should be designation (iii) / Compressive Class M4. Stronger mixes may be used only with the permission of the designer. Stronger mixes may also be required for work below ground in accordance with PD 6697. Consult manufacturer for details.

Movement joints should be considered in accordance with PD 6697 at approximately 6 m spacings. In areas of concentrated stress, such as those above and below openings, consideration should be given to the use of bed joint masonry reinforcement.

The design of walls should be in accordance with relevant design standards including BS 8103: 2, BS EN 1996-1-1 and the requirements of the Building Regulations.

Application:

Suitable for use in commercial and housing projects. Can be used to construct internal walls in commercial, industrial and leisure buildings. The blocks can be used for the following:

  • The inner and outer leaves of external cavity walls.
  • Internal walls including fire break walls.
  • Separating walls including those conforming to Robust Detail specifications.
  • External and internal walls below ground (3.6 N/mm² blocks can be used in both inner leaf and internal walls; 7.3 N/mm² blocks to other locations).
  • Infill units to beam and block flooring.

The blocks can accommodate drylining, dense plaster, finishing coats and external rendering. Consult manufacturer for further finish recommendations.

General information
Features

Good technical performance, high recycled content

Finish

Scratched surface

Material

Concrete

Shape

Rectangular block

Size

440 x 100/ 140 x 215 mm

Uniclass 2015 Aggregate concrete blocks (Pr_20_93_52_01)
Specification data
Product Reference

Ash GP Concrete Blocks

Standard

BSI Kitemark approved to BS EN 771-3

Block description

Medium density, load bearing block for general purpose walling applications

Appearance

Scratched surface to aid the key of plaster and render finishes

Configuration

Group 1

CompressiveStrength -
Category

M4

ThermalConductivity

0.47 W/m·K at 3% moisture content (internal use), 0.51 W/m·K at 5% moisture content (external use)

Thermal resistance

At 3% moisture content: 100 mm width: 0.212 m²K/W, 140 mm width: 0.298 m²K/W. At 5% moisture content: 100 mm width: 0.196 m²K/W, 140 mm width: 0.274 m²K/W

Recycled content

Minimum 35%

Tolerance category

D1

Density -
Net dry density

1450 kg/m³

Reaction to fire

Class A1

Water vapour permeability

5/15 µ

Work sizes (length x width x height)

440 x 100 x 215 mm

Unit weight: 14 kg.

440 x 140 x 215 mm

Unit weight: 19.6 kg.

Compressive strength options:

3.6 N/mm²

7.3 N/mm²

10.4 N/mm²

Moisture movement

<0.5 mm/m

SpecificHeatCapacity

1000 J/kg/K

Sound reduction index

At 100 mm width: 44–45 RW dB (dependent on application)

Fire resistance

100 mm: 2–3 hours; 140 mm: 3–4 hours

Standard product features

Colour:

Grey.

Features:

Good technical performance, high recycled content.

Finish:

Scratched surface.

Material:

Concrete.

Shape:

Rectangular block.

Size:

440 x 100/ 140 x 215 mm.

Environmental information
Recycled content

Minimum 35%

Literature
Third party certifications