Structural lightweight concrete
A 25–35% reduction in concrete weight at the same strength class, with a direct effect on section sizes and foundation loads.
Structural grades
Leca Structure 10–20
Product code ALS-1020
The lightest structural fraction, for where dead load governs the design.
10–20 mm fraction at 260–320 kg/m³, the lowest dead load of any structural grade.
- Grain size
- 10–20 mm
- Loose bulk density
- 260–320 kg/m³
Description
For lightweight concrete where dead load dominates, and for filling large volumes in composite floor build-ups.
Crushing resistance falls as the particle gets larger; above the 30 MPa strength class we recommend blending this fraction with 4–10.
Documents for this grade
Packaging & shipping
- Bulk tipper 60–90 m³
- Big bag 1 m³
Standards
- EN 13055-1
- ASTM C330
Technical data
| Grain size | 10–20 mm |
|---|---|
| Loose bulk density | 260–320 kg/m³ |
| Particle density | 520 kg/m³ |
| Crushing resistance | 0.9 MPa |
| Thermal conductivity | 0.091 W/m·K |
| Water absorption (24 h) | 18.5 % |
| pH | 7.5 |
| Fire resistance | 1150 °C |
Values published in datasheets are typical production values within the stated tolerance band. They do not replace engineering design, mix-design trials, or the requirements of a project specification.
Applications
Thermal insulation
A mineral, non-combustible insulant with no performance loss over the building's life.
Related grades
Structural grades
Leca Structure 4–10
The workhorse grade for cast-in-place and precast structural lightweight concrete.
- Grain size
- 4–10 mm
- Loose bulk density
- 320–400 kg/m³
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