EXPERIMENTAL STUDY OF STRESS-STRAIN CHARACTERISTICS OF CEMENT TREATED CHLORATE SALT RICH CLAYS

This paper investigates the effect of chlorate salt on the stress-strain characteristics of cement stabilized soils. The clay with various sodium chloride salt concentrations is prepared artificially and stabilized by ordinary portland cement with different contents. A series of unconfined compressive strength tests of cement stabilized clay specimens after various curing periods are carried out in laboratory. The test results show that the chloride salt has adverse effects to the cement stabilized clay. The unconfined compression strength and deformation modulus of the cement treated clays decrease as the chloride salt content increases. The failure strain of cement treated clays increases as the chloride salt content increases. The stress-strain curves of cement stabilized clay change from brittle failure to ductile failure as the chloride salt content increases. However, the ratio of deformation modulus to the unconfined compressive strength of cement clay is independent to the chloride salt content.