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Application

External and internal walls, above and below ground. Can be used as infill blocks in beam and block flooring systems. Can also be considered for use in the following locations:

  • The inner and outer leaves of external cavity walls.
  • Internal walls including fire break walls.
  • Separating walls including those conforming to Robust Detail specifications.
  • High strength, loadbearing walls - blocks up to 30 N/mm² available.
  • External and internal walls below ground.
  • Infill units to beam and block flooring.
  • Hollow blocks to construct reinforced retaining walls.

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

Description

High density concrete blocks suitable for internal and external walls.

The blocks are medium grey to buff in colour. Available in a range of sizes, strengths and grades for design flexibility.

Features and benefits:

  • Loadbearing and robust.
  • High strength.
  • For use internally and externally, above and below ground.
  • High levels of air tightness, sound insulation and fire resistance.
  • Suitable for a wide range of applications, including separating and partition walls.
  • 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:

External and internal walls, above and below ground. Can be used as infill blocks in beam and block flooring systems. Can also be considered for use in the following locations:

  • The inner and outer leaves of external cavity walls.
  • Internal walls including fire break walls.
  • Separating walls including those conforming to Robust Detail specifications.
  • High strength, loadbearing walls - blocks up to 30 N/mm² available.
  • External and internal walls below ground.
  • Infill units to beam and block flooring.
  • Hollow blocks to construct reinforced retaining walls.

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

General information
Color

Medium grey to buff

Features

For use internally and externally above and below ground, high levels of air tightness, sound insulation and fire resistance

Material

Medium density aggregate concrete

Dense aggregate concrete

Shape

Rectangular

Size

440 x 215 x 70 mm

440 x 215 x 90 mm

440 x 215 x 100 mm

440 x 215 x 140 mm

290 x 215 x 140 mm

440 x 215 x 190 mm

440 x 65 x 190 mm

440 x 215 x 215 mm

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

Lignacrete Concrete Blocks

Standard

BSI Kitemark approved to BS EN 771-3

Block description

High density, robust, loadbearing units for internal and external walls

Appearance

Medium grey to buff in colour with a texture

Configuration

Cellular (Group 2)

Hollow (Group 2)

Solid (Group 1)

Solid Midi (Group 1)

Special size, developed for ease of handling.

CompressiveStrength -
Category

M4

ThermalConductivity

1.33 W/m·K at 3% moisture content (internal use), 1.43 W/m·K at 5% moisture content (external use)

Thermal resistance

0.075–0.207 m²K/W depending on width

Recycled content

High, consult manufacturer for details

Tolerance category

D1

Density -
Net dry density

Blocks >20.0 N/mm²: 2000 kg/m³, Blocks <20.0 N/mm²: 2100 kg/m³

Reaction to fire

Class A1

Water vapour permeability

5/15 µ

Work sizes (length x width x height)

290 x 140 x 215 mm

Solid midi only. Unit weight: 17.5 kg.

440 x 75 x 215 mm

Solid only. Unit weight: 14.4 kg.

440 x 100 x 215 mm

Solid only. Unit weight: 18.9 kg.

440 x 140 x 215 mm

Available for solid, cellular and hollow. Unit weight: 26.5 kg (solid), 20 kg (cellular and hollow).

440 x 190 x 215 mm

Solid and hollow only. Unit weight: 35.9 kg (solid), 25 kg (hollow).

440 x 215 x 215 mm

Solid and hollow only. Unit weight: 40.7 kg (solid), 27.5 kg (hollow).

Compressive strength options

7.3 N/mm²

10.4 N/mm²

17.5 N/mm²

22.5 N/mm²

30 N/mm²

Face grade

Fair-faced

Natural in colour, made to order. For locations requiring a consistent colour and close textured block face.

Paint-grade

For locations where a consistent close textured face is required as a background for direct painting.

Standard

For locations where the surface will not be visible e.g. for plastering or use below ground.

Moisture movement

<0.6 mm/m

SpecificHeatCapacity

1000 J/kg/K

Sound reduction index

Varies dependent on width and application, consult manufacturer for details.

Fire resistance

Varies dependent on width and application, consult manufacturer for details.

Air tightness

Varies dependent on width and application, consult manufacturer for details.

Standard product features

Colour:

Medium grey to buff (paint grade and standard), fair faced (natural).

Features:

High strength, good sound insulation, above and below ground use.

Finish:

Available in fair faced, paint grade and standard grades.

Material:

Concrete.

Shape:

Rectangular block.

Size:

440 x 75–215 x 215 mm.

Recyclability:

100%.

Environmental information
Recyclability

100%

Recycled content

High, consult manufacturer for details

Digital objects
PlatformCompatibleVersionCertified to
IFC
IFC2X3 3 1.3
Revit
Revit 2016 4 2.0
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