Installation & Compaction

Economical and versatile to place, Leca® LWA is typically tipped into position, spread with a tracked excavator and compacted by 4 passes of the same vehicle or, it can be pneumatically blown into position, which offers specific benefits for some applications especially where site access is difficult.

Leca® LWA can be installed using machinery already in use on site for the placement of other earthworks applications – unlike other lightweight products that require costly, specialist equipment and installation techniques.

The pellets of Leca® LWA are round and find their position within bulk fill very quickly when pressure is exerted. For this reason the layers to achieve adequate compaction can be as deep as 1 metre, six times the depth of layer for traditional fill material and with compaction more than ten times quicker to install.

Once compacted, the modulus of elasticity is 15-20MN/m2 and the maximum level of effective stress to avoid crushing of grains is 100kN/m2. Increased loading can be achieved by introducing a capping Layer such as subbase material or concrete.

Full guidance please contact our team for more information.


Simple Compaction

Highlighting the ease of compaction with Leca LWA

Sustainability with LECA

Environmental and sustainable issues which were probably not the main focus 75 years ago, is certainly a concern today in the modern world.

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