Abstract
Abstract: Black cotton soil shows high swelling and shrinkage and less CBR value and strength due to presence of Montmorillonite mineral. Black cotton soil cannot be use for structural purpose in construction industry due to its expensive nature, therefore to control expensive behavior of the soil rise husk ash and silica fume is used in this experimental study. Rise husk ash used 0-15% by weight for observe experiment results and silica fume 0-12% by weight for observation of experiment results. Plasticity index, Free swell index of soil is decreasing with respect to RHA and SF addition and CBR value and shear strength of soil is increasing with respect to addition of RHA and SF . Optimum percentage of rise husk ash (RHA) and Silica fume (SF) observed as 12% and 9% respectively.
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