EFFECTS OF CEMENTITIOUS MATERIALS ON THE PERFORMANCE OF CLAYEY SOILS

In this study, lime and cement were used to improve the performance of bentonite soils representing sandy clay to clay soil. The bentonite soils were treated with cement and lime before testing them for compaction characteristics and stress-strain relationships. Characteristics of the treated mixtures were determined by adding 3% lime or cement to the soils. The results showed that there was changes in the compaction properties , strength, and failure strain of the stabilized soils. Based on the compressive strength, addition of lime and cement enhanced the bentonite clay (10% sand) while lime was more suitable for the sandy clay (90% sand). Addition of 3% cement also reduced the failure strain of the sandy clay. The cement stabilization had better strength with bentonite clayey sand (50% sand and 50% bentonite) compared to the lime treatment. Addition of 3% cement and lime affected dry density , optimum moisture content,and failure strain of the clay soil (10% sand) and sandy clay.