An Innovative Technique of Stabilization of Soil for Pavements Using Fly Ash and Steel Slag

The availability of materials for geotechnical application is becoming increasingly scare and there is a need to search for parsimoniously feasible substitute to these conventional materials. Fly ash and Steel Slag are such wastes which are produced in large quantity in India. The fly ash and steel slag being very light is easily carried by wind and water in its dry state thereby causing air and water pollution. The disposal of these wastes entails a large space. These wastes are available in abundance at a very low cost and can be easily used in stabilization of soil for the pavement sub-grade, embankments, landfill liners where in-situ mixing of soil and wastes are possible. However very limited information has been reported on steel slag in the literature. This paper presents some studies on the strength properties of soil mixed with fly ash and steel slag. The soil mixed with different proportions of fly ash and steel slag were tested for its engineering properties by performing a series of CBR tests on number of samples by using the different percentages of the fly ash and steel slag and comparing the results so obtained. The tests results have been analyzed and reveals that the strength increased considerably with the addition of these wastes. Also the optimum value of the wastes were found in terms of percentages where the strength was maximum.