Unsaturated soils are most common in geotechnical practice. In order to study mechanical behavior of unsaturated soil a series of constant water content tests were performed in this study. Soil specimens were tested under isotropic loading-unloading, monotonic and cyclic loading sequences to study the effects of stress history on change in void ratio and suction, and on shear characteristics of unsaturated soil. It was concluded that the mechanical behavior of silty soil named as DL clay is not affected significantly by loading sequences incorporated.
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