Volume Change and Shear Strength of an Unsaturated Expansive Clay

摘要

Laboratory tests were performed on unsaturated expansive clay in order to study the volume change and shear strength behaviour. The research has been carried out in the Metropolitan Region of Recife, Brazil, and involved standard pressure cells, standard oedometer and oedometer under suction controlled, standard direct shear and direct shear under controlled suction tests. The reuslts obtained provided the valuation of the volume change and shear strength behaviour of this soil, and allows to obtain unsaturated soil parameters for engineering design.