Lignacrete 215 mm Hollow 7.3 N Concrete Blocks - High Density Robust Loadbearing Units
Verified by manufacturer 6 months ago
Part of a range of high density, robust, loadbearing units, suitable for internal and external walls.
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 30N/mm² are available for demanding, load-bearing designs.
Generally, blocks have a face size of 440mm x 215mm. However, Lignacrete 140mm Midi blocks have a face size of 290mm x 215mm and have been developed for easier handling while retaining the performance of conventional-size solid blocks.
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 guidanceDense aggregate concrete. |
Shape | Rectangle |
Length | 440 mm |
Width | 215 mm |
Height | 215 mm |
Uniclass | |
CAWS | E60/297 Proprietary infill blocks F10/18 Concrete facing blockwork F10/355 Concrete common blockwork |
Product range |
Specification data - Aggregate concrete blocks
Standard | 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. Paint-grade block.Guidance for specification option: For locations where a consistent close textured face is required as a background for direct painting. Manufacturer guidanceHigh density, robust, loadbearing units for internal and external walls. |
Appearance | Medium grey to buff in colour with a texture. |
Configuration | Group 2.Guidance for specification option: Hollow. |
Compressive strength | |
Mean value | 7.3 N/mm². |
Category | M4. |
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 | 0.222 m²K/W at 3% moisture content; 0.213 m²K/W at 5% moisture content. |
Work sizes (length x width x height) | 440 x 215 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: 55 dB; plasterboard on dabs: 54 dB; paint finish: 53 dB. |
Fire resistance | Non-loadbearing wall (criteria E1): 4 hours; loadbearing wall (criteria RE1): 4 hours. Guidance for specification option: See manufacturer's literature for further examples. |
Third-party certification | BSI Kitemark approved KM 09694. |
Unit weight | 25.1 kg. Guidance for specification option: Laid weight including mortar: 274 kg/m². |
Sustainability data
Embodied carbonA1-A3 (production stage) as defined in BS EN 15804 | 0.10 kg CO₂ eq/kg Self declared Guidance for specification option: Rounded down to two decimal places; manufacturer's value is 0.106 kg·CO2e/kg. Derived from the carbon value as per the EPD (27.5 kg·CO2e) divided by the unit mass (260 kg/m²). |
Literature
Thermal Bridging Information - Lignacite
Lignacrete Dense Concrete Block Range
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