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Lignacrete 100 mm Solid 17.5 N Concrete Blocks - High Density Robust Loadbearing Units

Verified by manufacturer 6 months ago

Lignacite Ltd

Part of a range of high density, robust, loadbearing units, suitable for internal and external walls.

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Application

Lignacrete can 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 party wall specifications
  • Below ground
  • Infill units to beam and block flooring
  • Vertically reinforced walls – using hollow blocks
  • For walls that are to be directly decorated, Paint Grade blocks should be specified.


Lignacrete blocks are medium grey to buff in colour. They are capable of being finished with all recognised treatments, including plaster, drylining and render, as well as cladding treatments. Paint Grade blocks can be directly painted.

Description

Lignacrete dense concrete blocks are robust and durable with a technical performance that will fulfil most applications. They are manufactured to BS EN 771-3 and are available in standard and paint grade (close textured for direct painting). High strength blocks up to 30 N/mm² are available for demanding, loadbearing designs.


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 BREEAM 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.


Generally, the mortar type for work above ground level should be designation (iii) / Compressive Class M4. However, where it is needed to maximise the loadbearing capacity of the wall, designation (ii) / Compressive Class M6 mixes should be specified. Stronger mixes may also be required for work below ground.


Vertical movement joints should be considered in accordance with masonry design codes and the recommendations of Published Document PD 6697, at 6.0-8.0 metre spacings. In areas of raised stress, such as above and below openings in external walls, the blockwork may need to be reinforced to restrain movement.


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

General information

Color

Grey

Guidance for specification option:

Paint grade and standard. Fair faced - natural.

Material

Concrete

Aggregate

Manufacturer guidance

Dense aggregate concrete.

Shape

Rectangle

Length

440 mm

Width

100 mm

Height

215 mm

Uniclass

Pr_20_93_52_01 Aggregate concrete blocksPrimary

CAWS

E60/297 Proprietary infill blocks

F10/18 Concrete facing blockwork

F10/355 Concrete common blockwork

Product range

Lignacrete Dense Block Range

Specification data - Aggregate concrete blocks

Standard

To BS EN 771-3.

Block description

Fair-faced block.

Guidance for specification option:

For locations requiring a consistent colour and close textured block face.

Paint-grade block.

Guidance for specification option:

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

Common block (standard).

Guidance for specification option:

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

Manufacturer guidance

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

Appearance

Medium grey to buff in colour with a texture.

Configuration

Group 1.

Guidance for specification option:

Solid.

Compressive strength

-

Mean value

17.5 N/mm².

Category

I.

Thermal conductivity

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 m²K/W at 3% moisture content; 0.069 m²K/W at 5% moisture content.

Work sizes (length x width x height)

440 x 100 x 215 mm.

Tolerance category

D1.

Density

-

Net dry density

2000 kg/m³.

Reaction to fire

Class A1.

Water vapour permeability

5/15 µ.

Moisture movement

<0.6 mm/m.

Weighted sound reduction index, Rw

Plaster finish: 51 dB; plasterboard on dabs: 49 dB; paint finish: 48 dB.

Fire resistance

Non-loadbearing wall (criteria E1): 3 hours; loadbearing wall (criteria RE1): 2 hours.

Guidance for specification option:

See manufacturer's literature for further examples.

Third-party certification

BSI Kitemark approved KM 09694.

Air tightness

No finish: 2.73 m³/h/m²; paint finish (one side): 0.88 m³/h/m².

Unit weight

18.9 kg.

Guidance for specification option:

Laid weight including mortar: 198 kg/m².

Sustainability data

Recyclability

100%

Literature

Lignacrete Dense Concrete Block Range

Lignacrete Dense Concrete Block Range

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