The in-plant treatment of soils allows for the use of local materials in addition to in-situ treatment techniques. In this case, we are talking about limed base material.
In numerous constructions, the soil forms the base of the structure. This is the case for earthworks. But sometimes the soil cannot be exploited in its existing state. In-plant soil treatment complements in-situ soil treatment when there is a great variety of materials, a high water content or a significant depth of treatment, for example. In such cases, a proportion of the soil is excavated and replaced by material conforming to a technical specification. The growing scarcity of resources and the need to reduce the dumping of inert products in landfills have forced us to take account of environmental concerns.
According to laboratory studies, the excavated material may either be treated directly for use on the worksite or for other applications. In-plant treatment allows for the treatment of heterogeneity, granular structure, water content, bearing capacity, plasticity and frost resistance.