Stabilization is one of the most common methods for treating the expansive soils to make it suitable as an engineering material. Disposal of a massive amount of industrial wastes as fill material on disposal sites nearer to industries not only needs a large space but also induce a huge geo environment problem. The production of alkali activator by utilizing industrial waste materials has become an important field of research as it is possible to use these materials to produce a non expensive and ecologically sound cement like stabilizing material. The activation of waste materials such as fly ash in an alkaline medium is a chemical process that allows the user to transform glassy structures (partially or totally amorphous and/or metastable) into a very compact cemented stabilization material. Present study is focused on the new and eco-friendly method adopted in soil modification. Studies were carried with polymerization of Lithomargic soil using industrial waste by products such as fly ash and GGBS. Evaluation of un-confined compressive strength (UCS) and California Bearing Ratio (CBR) of lithomargic soil treated with various dosages of such alkali activated polymers for a time period of 0, 7, 14 and 28 days at different dosages of alkali activated fly-ash and GGBS. The outcome from the laboratory investigation revealed that using alkali activated geo-polymer the soil can be effectively stabilized and can be used in improving the engineering properties of weak lithomargic soil.