The potential of using iron ore mine waste with an highly compressible clayey soil soil from North Karnataka, India, is investigated in this study. Mining activities lead to the production of waste materials during their extraction and processing stages. The waste maybe in the form of an overburden, waste Rock, Mine Water, or Tailings, depending on the geology, type of processing technology used and the resources mined. The lack of storage space has also been a major concern for the mineral producing agencies, thus paving ways for its better utilization in various construction processes. The collected mine waste was added to expansive soil in different percentages and the mix was tested for Atterberg limits, compaction characteristics, Unconfined compressive strength and California bearing Ratio. It was found that the liquid limit and plasticity index of the soil reduced with addition of mine waste while strength improved. Based on test results of maximum dry density and unconfined compressive strength, a mix of 40% mine waste with 60% expansive clayey soil is recommended for low cost roads. Blending mine waste with expansive soil paves way for sustainable construction besides economic benefits

Mine wastes are one of the chronic waste concerns. The volume of solid waste generated during mining process, is one of the main pollution concern. The presence of high concentration of heavy metals and acid producing mineral phases can endanger the environment if management of these wastes are not addressed properly. Mine wastes have numerous ecological effects viz Air, Land and Water. There is a great difficulty in finding space for the storage of wastes generated in enormous quantity. The review of past studies indicated that 50 to 60% of mine waste by volume can be used as coarse grained particle and 10 to 15% by volume as fine aggregate. Despite quite a lot of attempts to diminish the amount of waste, mine waste remains one of world's largest waste streams. Black cotton soil on the other hand is problematic due to the presence of momtmorillonite that imparts high swellshrink potentials. These soils are very hard when dry but loose strength completely when wet. Pavement surface on poor soil subgrade show early distress causing pavement failure. The present study examines the utilization of these wastes as stabilizers for black cotton soil for unpaved road construction.

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Expansive soils, which are generally termed as problematic soils, cause swelling and shrinkage resulting in significant damage to the structures constructed on them. In this study, an attempt is made to know the effect of Road Building International Grade 81 (RBI Grade 81) on strength characteristics of expansive soil. RBI Grade 81 has a wide range of response spectrum. Response spectrum is the range of soils for which a particular stabilizer can be used. A wide range of tests, such as Atterberg limits, compaction, unconfined compressive strength, and California bearing ratio, were conducted on expansive soil and expansive soil treated with various percentages of RBI Grade 81. The results indicate that RBI Grade 81 is effective in improving engineering properties of expansive soil.