Effect of Stone Dust on the Strength Characteristics of Black Cotton Soil Stabilized with Rice Husk Ash

---------------------------------------------------------------------***--------------------------------------------------------------------Abstract Over the past few decades Road infrastructure in India is developing at a quick pace. A decent pavement is required for the safe, comfortable and prudent development of traffic. The thickness of road relies on geotechnical properties of subgrade soil and traffic intensity. The construction expense can be extensively reduced by choosing neighborhood resources including locally available soils for the bottom layers of the pavement. In the present circumstance as the industrialization and urbanization is occurring, it has created numerous unsafe and nonperilous wastes. This prompts draining landfill space, soil contamination and numerous different risky impacts; henceforth in this study use of waste (i.e., Rice husk ash) for enhancing the soil properties is made. In the present study influence of stone dust on the quality characteristics of Rice husk ash stabilized black cotton soil to increase the features of subgrade soil were determined. Atterberg’s limit, Compaction, Unconfined Compressive Strength (UCS) and California Bearing Ratio (CBR) experiments were carried out on the specimens of native soil and BC soil with stabilizers. Different specimens have been made by taking soil with different percentage of stone dust (5%, 10%, 15%, 20% and 25%). The correlation of the results with or without stone dust has been done. All test were led according to IS 2720 standards. The results demonstrated less value of strength parameters for BC soil, but after the stabilization BC soil indicated increased value of CBR, UCC. For better stabilization result, the optimal percentage of Soil: Rice husk ash: Stone dust was found to be 75: 10: 15