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Stabilization is an unavoidable for the purpose of highway and runway construction, stabilization denotes improvement in both strength and durability which are related to performance good qualities of sub grade soils are preferable for durable road but not always available for highway construction. So the most appropriate method will usually be determined by economic considerations, for example it may be cheaper to stabilize a soil using relatively expensive additives rather than excavate and dispose of unsuitable materials and place suitable fill, as well as the properties of the sub grade. In this experimental study has been conducted in two stages asstage i: variation of bfs are added i.e. 10, 20, 30, 40 and 50% by dry weight of soil into the soil. The result obtained in stage i is not satisfactory as at increases a cost of stabilization due to higher amount of bfs consumed during stabilization thus we move on next stage. Stage ii: two proportion of bfs are added i.e. 10%, 20% with fixed amount of lime (=2%) are added to soil and is used to study the stabilization of soil. The performances of stabilized soil are evaluated using strength performance tests like standard proctor test and california bearing ratio (cbr) test at optimum moisture content. Addition of bfs to soil in an optimum quantity i.e. 20% with 2% of lime proved beneficial and got best result for maximum dry density and cbr. keywords: blast furnace slag, back cotton soil, cbr, mdd.

Improvement of CBR and Compaction Characteristics of Black Cotton Soil Using Lime and Blast Furnace Slag