The Influence of Dry Density and Applied Loads on Expansive Soils

Abstract

The present research studies the effect of changing dry density on expansive soil and the effect of applied load on expansive behavior of soils together with the comparison of the values of swelling pressure with free swelling. The two types of effect have been studied on three samples of a mixture of bentonite and sand. After the identification of the physical characteristics of the sand and bentonite, the sand was used as a basic and natural material to decrease soil swelling. The gained results proved that loads play an important role in reducing the ratio of swelling and it is necessity to obtain the required field density that lead to reducing swelling.