Fabric alteration of a compacted lime-treated expansive soil upon drying and wetting
Résumé
The main purpose of this study is to examine both at micro-and macro scales the effects of wetting / drying on swelling / shrinkage behaviour of a com-pacted expansive clayey soil treated with lime. The results showed that lime treatment was efficient to prevent the swelling, but the shrinkage remained unchanged , regardless of the added lime content. Even if no significant volumetric variation was observed upon wetting, a reorganisation of the lime-treated soil mi-crostructure was evidenced. Moreover, an alteration of both micro-and macro-porosity of the lime-treated materials was observed upon drying.