Leca® Lightweight Expanded Clay Aggregate
Verified by manufacturer 5 days ago
Expanded clay lightweight aggregate for in-situ formed thermal insulation of ground floors.
Application
Used in masonry blocks, wall elements, premixed products for light and insulating screeds, lightweight geo-technical fills, underfloor insulation, lightweight and fire resistant mortar, hydro culture and many other applications.
Leca® LWA - Lightweight fill for a variety of civil engineering applications:
- Lightening the loads on bridge abutments.
- Reducing earth settlement.
- Providing efficient drainage.
- Protecting and insulating service pipe work.
- Alleviating pressure above natural voids or culverts.
- Stabilising slopes.
- Lessening the load behind retaining walls.
- Void infill.
Description
Leca® Lightweight fill (LWA) is a ceramic lightweight aggregate produced by expanding selected clays in a rotary kiln at temperatures over 1150°C. It has a hard and resistant exterior skin and a cellular interior. These are the main features that give LECA® LWA the optimum mix of lightness and resistance.
It is much faster and easier to place than traditional fills due to its light weight, rounded nature. Installation layers of up to 1 metre in depth can be easily achieved which will help save program time and cost.
Features and benefits:
- 85% less bulk density and 75% reduction of horizontal earth pressure to retaining structures on average when compared to traditional fills.
- Reduced settlement periods and increased stability.
- Superb insulating and free drainage properties.
- Class A1 (non-flammable).
- Resistant to extreme temperatures, moisture and chemical attack.
- 100% inert and contains no harmful substances or gases.
- Requires less vehicles for delivery – up to 70m³ per load.
- Resistant to chemical attack.
- 40% void capacity.
- Lightweight - 260–360 kg/m³.
- Thermal insulation 0.095–0.12 W/mK depending on grading.
- Angle of friction typically 37°.
- No cohesion between particles.
- Harmonised to comply with EN 15732.
General information
Color | Beige Brown |
Finish | Textured |
Material | Clay |
Shape | Circle |
Length | Bespoke |
Width | Bespoke |
Height | Bespoke |
Warranty description | Other |
Uniclass | |
CAWS | Q23/150 Loose laid chippings |
Specification data - Expanded clay lightweight aggregates
Classification data | |
Standard | To EN 15732 and EN 14063. |
Particle shape | Rounded. |
Particle size | 10–20 mm. |
Water permeability | <75 mm. Manufacturer guidanceWater permeability (water suction height). |
Density | 245 kg/m³ (+/- 15%). Manufacturer guidanceLoose bulk density. |
Compressive strength | >0.52 N/mm². |
Reaction to fire | A1 non-combustible. |
Sustainability data
Contains Red List materials | No |
Country of material origin | Denmark |
Country of product manufacture | Denmark |
Manufacturing plant location | |
Material | Clay |
Recyclability | Fully reusable at end of life |
Recycled contentAs defined in clause 7.8 of BS EN ISO 14021 | 0 % |
Expected Life | Lifetime |