Road widening and embankment widening

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In road widening or when adding a lane on an existing embankment, it is very important not to cause any damage to the old embankment and to avoid differential settlement at the connection between the existing structures and their extension.

Embankment widening with traditional fills considerably increase the loads upon supporting soil and makes it very difficult to avoid short- and long-term settlement and thus unevenness, level difference and joint cracking the wearing courses between the old and new part of the road caused by tensile stresses in the pavement, especially in compressible soils.

The construction of extensions with lightweight embankments made of Laterlite expanded clay makes it possible to avoid these risks thanks to the lower settlement due to compaction compared to conventional aggregates, the minimal overloading of the supporting soil and the very easy densification of the aggregates.

Find out more about Laterlite lightweight embankments and how to build them.

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