Performance of CSM stabilised soils in geotechnically complex formations

The paper represents an initial part of an more extensive study aimed at developing simple operative criteria to optimise the cutter soil mixing process in the presence of geotechnically complex formations (e.g. layered subsoil with high variability of mechanical and hydraulic properties). To achieve homogeneity along the depth of a column it is necessary to adapt the treatment to the different soil strata. For this purpose, an extensive laboratory testing programme was carried out to examine the effect of cement contents on the mechanical and physical properties of different treated soils. The study shows that relatively homogenous results in terms of compressive strength and permeability may be reached by modifying the treatment parameters. The results constitute a preliminary useful guide to adapt the construction techniques in actual field applications.