Abstract
In this study, the effect of adding lime to clay soil on strength was investigated. For the purpose of the study, lime, which is used as an additive, was added to the clay soil in different percentages by weight. In the prepared mixtures, lime was added in 2.5%, 5%, 7.5%, 10%, 15% and 20% of the weight of clay. The samples prepared in different proportions were homogeneously mixed, and then compaction, unconfined compression and California bearing ratio (CBR) tests were performed. As a result of experimental studies, as the lime content in the mixture increased, the plasticity index and maximum dry density decreased while the optimum water content increased. In addition, the highest unconfined compressive strength value of the samples cured for 7 and 28 days was obtained at the rate of 5% lime. For this additive ratio, the CBR values of the samples cured at the same time were 1.37 and 2.08 times higher than the additive-free clay soil, respectively.