In today’s day soil stabilisation is the major problem for civil engineers, either for construction of road and also for increasing the strength or stability of soil and reduces the construction cost. Ground granulated blast furnace slag (GGBS) material is used in the current work to stabilise soil (clay). The main objectives of this research were to investigate the effect of GGBS on the engineering property (optimum moisture content and maximum dry density, plastic limit, liquid limit, compaction, and California bearing ratio test) of the soil and determine the engineering properties of the stabilised. Granulated shaped blast furnace slag is most suitable for increasing the strength of the soil and for this we check the following property of soil. GGBS, ZYCOBOND, TERRASIL are added from 0% to 15% by dry weight of soil, first of all check the all soil property at 0 % (no GGBS, ZB, TS) and then compare after addition of GGBS, ZB, TS from 5% to 15%.