A Study of Lime Stabilization on Soil of a Selected Reclaimed Site of Dhaka City

摘要

Engineering properties of a lime stabilised soil collected from a reclaimed site of Dhaka, Bangladesh was studied. The soil used in this investigation is high plasticity silty clay with liquid limit of 52 and plasticity index of 29. Compaction tests, unconfined compression tests on compacted large cylindrical samples (71 mm diameter by 142 mm high and compacted according to Modified AASHTO compaction test), California Bearing Ratio (CBR) tests and flexural strength tests using simple beams with third point loading were carried out on the untreated samples and samples stabilised with different lime contents (1%, 3%, 5% and 7%). Effect of curing age on unconfmed compressive strength and flexural strength was also investigated for the stabilised samples. From compaction tests, it was found that with increase in lime contents maximum dry density reduced and optimum moisture content increased. Considerable increase in compressive strength was found due to stabilisation which depended on the lime content and curing age. CBR values of the stabilised samples increased significantly. Flexural strength of soil-lime beams also increased.