This article focuses on a technique for shallow mechanical improvement of soil which deals with the utilization of crushed
granite mixed in a certain percentage with lateritic soils during road construction in Burkina Faso. Lithostab is the simplified name
for litho-stabilization, a technique for improving laterite by adding crushed granite that increases the CBR (California bearing ratio)
of that material for being used in road construction. Class 0/25 of crushed granite added to a laterite in our case gives good
performance in terms of CBR. Indeed, the CBR index which was initially 48 at 98% of the OMP (optimum modified Proctor) goes to
88. And from 84 at 98% of the OMP, it goes to 128 for 30% of class 0/25 of crushed granite added. This means that class 0/25 of
crushed granite provides better CBR index to that material when it is incorporated at 30%. So, lithostab is an easy to implement
eco-friendly material for road construction because of the utilization of local materials. Then, it contributes to the protection of the
environment in the sense that its production does not require a lot of energy and does not release large quantities of carbon dioxide
into the atmosphere.

Lithostab, technique for improving, geotechnical performance, laterite, roads.