Comparative Study on Stabilization of Expansive Soil using Cement Kiln Dust and Ceramic Dust

Abstract

In India, expansive soils cover about 20% of total land area, these soils increase in volume (swell) during winter season and decrease in volume (shrink) during summer season. Due to this contradiction behaviour many civil engineering structures constructed on expansive soils get damaged severely, out of which pavement is the most because they are lightweight and extend over large areas. Stabilization of Expansive soil is of most importance, since to increase the strength of soil and to reduce the construction cost by making best use of locally available materials. The effects of Cement Kiln Dust (CKD) and Ceramic Dust (CD) on expansive soil by conducting the laboratory tests like Atterberg’s limit, Compaction characteristics, Unconfined Compressive Strength, California Bearing Ratio, and Free Swell Index etc were studied. Locally collected Black Cotton (BC) soil was mixed with addition of industrial waste materials such as; CKD and CD from 0 to 6% with an increment of 2%. From the analysis of test results, it was found that Liquid Limit (LL), Plasticity Index (PI), Optimum Moisture Content (OMC) and Free Swell Index (FSI) were decreased with an increment of CKD and CD percentage. Plastic Limit (PL), Maximum dry density (MDD), Unconfined Compressive Strength (UCS) and California Bearing Ratio (CBR) were increased with an increment of CKD and CD percentage. From this study we have concluded that CKD has very high lime (CaO) content up to 60% and CD has very high Silicon dioxide (SiO 2 ) because of these characteristics, they can be used as effective utilization in roads, embankment and soil treatment for foundation. Keywords : Expansive Soil, BC soil, soil stabilization, CKD, CD