EFFECT OF PHOSPHOGYPSUM AND FLY ASH ON THE CBR AND UCS OF CLAYEY SOIL by Anoop Sharma
Nowadays there is immense problem to harmless disposal of industrial wastes. Lots of waste resources are non-biodegradable so they make a environmental contaminated in the locality. Some studies show that in earlier period, manufacturing wastes can be used successfully in road construction. In the process of road making, the use of unwanted materials is based on some industrial, monetary and ecological criteria. Like India is a rising country and has a vast network of manufactories that are positioned in different parts of the country and may more are to establish in next few years. Industrial wastes are formed in huge amount from these industries in thousand tons. The disposal and pollution problems may be controlled by suitably utilizing the waste materials in construction sites. It is very crucial to test the materials properly and to build up a methodology and specifications, to increase the utilization of the industrial wastes for their successful use in road construction. This paper describes the use of Phosphogypsum and Fly Ash for soil stabilization. Modified proctor test, California bearing ratio test and unconfined compression strength test were carried out . The fraction of Phosphogypsum is used in this paper is 1,3,5 and 7 along with fixed value of fly ash 20%. The different percentage were determined which showed considerable enhancement in the strength of treated soil. The maximum value of C.B.R. is at 5% Phosphogypsum and fly ash 20%. additional increase in ratio of Phosphogypsum the C.B.R. value decreases. The maximum value of U.C.S. is also at 5% Phosphogypsum and fly ash 20%. Experiment results show Phosphogypsum and fly ash enhances the strength properties of soil along with use of economical materials and also solves the environment problem.