Abstract
This paper presents the effect of abundantly available fly ash, on the index properties namely liquid and plastic limit and compaction characteristics of shedi soil. Shedi soil is a problematic soil that lies between top low level laterite and bottom high level laterites in the western coastal area of Karnataka, India. The effect of sodium salts on this shedi soil optimized with Neyveli Fly ash has also been studied. Considerable changes in the index properties and compaction characteristics were observed which are explained based on series of experimental results. Addition of Neyveli fly ash improved the workability of shedi soil considerably. The addition of sodium sulphate to the optimum combination of shedi soil-Neyveli fly ash mixture increases the shear strength of the mixture. The maximum dry density also found increased with the addition of sodium sulphate.
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