Utilization of industrial waste materials in the improvement of problematic soils is a cost efficient and also environmental friendly method in the sense that it helps in reducing disposal problems caused by the various industrial wastes. The main objective of the present study is to improve various engineering properties of the soil by using waste material Ground Granulated Blast Furnace Slag (GGBS) as an alternative to lime or cement, so as to make it capable of taking more loads from the foundation structures. This paper reports the findings of laboratory tests carried out on local Indian expansive black cotton soil with GGBS mixed with the expansive soil in different proportions. The specimens compacted to their respective Proctor's optimum moisture content and dry density (which varied from mixture to mixture) were cured for a period of 7, 14 and 28 days and their unconfined compression strengths were determined. It is observed that the strength improvement depends on the amount of GGBS used and the effect of curing period is less pronounced. Further it was shown that the initial tangent modulus values generally increases with increase in GGBS content
Dr. Anil Kumar Sharma and Sivapullaiah, P. V., “Improvement of Strength of Expansive Soil with Waste Granulated Blast Furnace Slag”, GeoCongress 2012,March 25-29, 2012 Oakland, California. pp. 3920-3928, 2012.