Stabilization of Clayey Soil with Lime and Waste Stone Powder

Abstract. Clay soils are commonly stiff in dry state but lose their stiffness when saturated with water. Soft clays are characterized by low bearing capacity and high compressibility. In this research, waste stone sludge obtained from slab stone processing, from stone washing plants were recycled for Stabilization of clayey soil with lime. Thus, the effectiveness of using waste stone powder and lime in stabilizing fine-grained clayey soil (CL) was investigated in the laboratory. The soil samples in natural state and when mixed with varying percentages of lime and waste stone powder were used for the laboratory tests that included atterberg limitstests, grain size analysis, standard Proctor compaction tests, unconfined compression tests and California bearing ratio tests. The results show significant reduction in plasticity and changed the optimum moisture content and maximum dry density of clayey soil with increasing percentage content of waste stone powder and lime. The results of the unconfined compressive strength (UCS) and California bearing ratio (CBR) tests show that at the different curing times, the addition of waste stone powder and lime caused an increase in thevalue of UCS up to 6% waste stone powder content and 7% lime content, and increase in thevalue of CBR to 6% waste stone powder content and 9% lime content, thereafter, the values of UCS and CBR decreased.