Slope stability

Leca® LWA is a lightweight material with open voids even when compacted.

This characteristic provides high drainage capacity and together with a very low density will greatly assist in reducing the risk of bearing capacity failure and increase the stability of the side slopes.

Efficient drainage of the structural layers of the road build up can prevent loss of load bearing properties caused by water and ensure a good load bearing capacity throughout the road life.

Slope Stability

Using free draining Leca® LWA as a structural material within the road build up will intercept the percolating water and water rising by capillary action from the sub-formations and direct the rising water away from the upper construction layers to improve the load bearing capacity. Carriageways in cuts that extend below the natural level of the groundwater, frost damage and loss of load bearing capacity can also be reduced by forming drain trenches filled with Leca® LWA at both sides of the road, along which the water is led away. Used within the carriageway drainage, Leca® LWA will help filter and increase microbiological breakdown of pollutant run off from fields and highways.

slope stability
slope stability
slope stability
slope stability

Maintaining levels within any foul or surface water drainage system can be difficult when the drain runs across a soft soil site. Leca® LWA can be used as a light weight pipe surround to reduce the pressure to the underlying soils and minimize the likelihood of irregular settlement.



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

Related Downloads

Please register your details first

Areas of interest