Effect of Lime Stabilisation on Swelling and Strength Properties of an Expansive Soil

摘要

The influence of lime stabilisation on swelling and strength characteristics of an expansive soil of Bangladesh has been investigated. The soil was collected from Rajendrapur Cantonment, Gazipur. The relative degree of expansion of the soil sample has been found to be high. The soil was stabilised with lime contents of 3%, 6%, 9%, 12% and 15%. Free swell and free swell index of the stabilised samples decrease significantly with increasing lime content. Swelling pressure, swelling potential and volume change of the treated samples also decreased markedly with the increase in lime content. Compared with the untreated sample, unconfined compres-sive strength of the treated samples increased significantly, depending on the lime content and curing age. It was found that strength development index increased with increasing curing age and lime content. It has been observed from the present investigation that long-term curing has profound influence on the gain in strength. Flexural strength and flexural modulus of the stabilised samples also increased significantly, depending on the lime content and curing age.