REVIEW ON STABILIZATION OF CLAYEY SOIL USING CALCIUM CARBIDE RESIDUE AND FLY ASH

Abstract

It has become a common problem that newly established engineering projects are located in areas with weak, soft and incompatible soils . This becomes extremely risky in geotechnical field because such soils are more liable to differential settlements, low compressive strength, and high compressibility. The accepted usual technique to mitigate such issues is the process of soil stabilization. Calcium carbide Residue (CCR) and Fly Ash (FA) are both waste products from acetylene gas factories and power plants, respectively. The mixture of CCR and FA produces a cementitious material because CCR contains a lot of Ca(OH)2, while FA is a pozzolanic material. This review paper focus on the possibility of using this cementitious material (a mixture of CCR and FA) to improve the strength of clayey soil. Strength development is investigated using the Unconfined Compression Test. This study investigates the use of two kinds of industrial wastes Calcium Carbide Residue and Fly Ash in the stability of soil. These industrial wastes are generally dumped or thrown, which produce detrimental effect on the environment. The use of these wastes in soil stabilization improve the properties of soil which helps in various purposes such as designing of pavements, embankments, earth slopes, in filling of low lying areas, etc. and save the environment from the ill impact. The soil can be treated and stabilized well at a relatively low cost by using these additives. The tests conducted on clayey soil are Atterberg Limits(Liquid Limit Test and Plastic Limit Test), Specific Gravity test, Proctor Test, Unconfined Compressive Strength(UCS) Test and California Bearing Ratio Test. Varying doses of FA and CCR are added to the soil to improve its properties.