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Lignacite SP 140 mm 3.6 N Concrete Blocks - Fine-Textured Loadbearing Units

Verified by manufacturer 6 months ago

Lignacite Ltd

Part of a range of fine-textured loadbearing units, suitable for facing and general purpose applications.

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Application

For walls that are to be directly decorated, Paint Grade blocks should be specified.


For walls built fair, Fair Face blocks should be specified.


Walls of 210–215 mm thickness are recommended to be constructed using two leaves of 100 mm Lignacite blocks laid back-to-back and suitably tied. This construction is known as a collar-jointed wall.


Can be used 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;
  • 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.
  • Fair-faced blocks are recommended for internal use.


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

Description

Lignacite concrete blocks are fine textured and available with a paint grade or fair face finish. Manufactured to BS EN 771-3, Lignacite blocks are robust and durable with a technical performance that makes them well-suited to most applications.


The blocks’ unique mix design (consisting of cement, fine aggregates and recycled graded-wood particles) accounts for their outstanding technical performance.


This 140 mm-wide version, known as Lignacite SP, has a specially formulated mix that optimizes the block density to produce a solid block with a unit weight of less than 20 kg. There is a slight colour difference between Lignacite SP and 100 mm Lignacite blocks.


Features and benefits:

  • Loadbearing.
  • For use internally and externally, above and below ground.
  • High levels of air tightness, sound insulation and fire resistance.
  • 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.


Mortar:

Generally, the mortar type for work above ground level should be designation (iii) / Compressive Class M4. Stronger mixes may be required if blocks are used below ground.


Movement:

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.


Design:

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

General information

Color

Grey

Finish

Textured

Material

Concrete

Aggregate

Manufacturer guidance

Medium density aggregate concrete.

Shape

Rectangle

Length

440 mm

Width

140 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

Lignacite Medium Dense Block Range

Specification data - Aggregate concrete blocks

Standard

To BS EN 771-3.

Block description

Common block (standard).

Guidance for specification option:

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

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.


Manufacturer guidance

Fine textured, loadbearing units for facing and general purpose applications.

Appearance

Medium grey in colour with a fine textured surface.

Configuration

Group 1.

Guidance for specification option:

Please note there is a slight colour difference between the traditional block and the Lignacite SP.

Compressive strength

-

Mean value

3.6 N/mm².

Category

I.

Thermal conductivity

0.79 W/m·K at 3% moisture content.

Guidance for specification option:

Internal use.

Thermal resistance

0.177 m²K/W at 3% moisture content.

Work sizes (length x width x height)

440 x 140 x 215 mm.

Tolerance category

D1.

Density

-

Net dry density

1450 kg/m³.

Guidance for specification option:

SP.

Reaction to fire

Class A1.

Water absorption by capillarity

5/15 µ.

Moisture movement

<0.7 mm/m.

Weighted sound reduction index, Rw

No finish: 49 dB; paint finish: 50 dB.

Fire resistance

Non-loadbearing wall (criteria E1): 4 hours; loadbearing wall (criteria RE1): 3 hours.

Guidance for specification option:

See manufacturer's literature for further examples.

Third-party certification

BSI Kitemark approved KM 09694.

Air tightness

No finish: 4.62 m³/h/m²; paint finish (one side): 0.25 m³/h/m².

Unit weight

19.2 kg.

Guidance for specification option:

Laid weight including mortar: 206 kg/m².

Sustainability data

Recyclability

100%

Literature

Lignacite and Ligacite SP Concrete Blocks

Lignacite and Ligacite SP Concrete Blocks

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