LAUSR

Silty soils are widespread in many countries, particularly in the United States, China, and India; hence it is essential to get an idea of the response of such soils under different forms of loading. In this paper, the results based on undrained triaxial tests, under static as well as cyclic loading, which were carried out on the silty sands (fine sand mixed with non-plastic fines at different percentages) are presented. The samples were prepared at the required unit weight (Dr = 50%), saturated by using back pressure and cell pressure increments and consolidated isotropically. Each consolidated sample is then subjected to static/cyclic loading. The results of the static triaxial testing showed that the non-plastic fines have a significant influence on the behaviour of fine sand. The dilation tendency decreases with the addition of fines. In the case of cyclic triaxial testing, as the fines content increases, the rate of generation of excess pore water pressure and axial strain on cycles of loading was found to increase and hence the liquefaction susceptibility.