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Approximately 21.4% of the total geographical area of the country covered with Expansive soils. Chemical stabilization of soil using cement, lime etc, is costly. Stabilization of soil using solid wastes like Rice husk Ash and Fly ash which reduces the cost of chemical stabilization a review is made on Rice husk ash and Fly ash.RHA has rich amount of silica and FA believed to be one of the best pozzolans which may be used as chemical stabilizers for soil stabilization. The rice husk ash and fly ash is mixed in various proportions with soil like 5%, 10%, 15% and 20%. Various tests were also conducted on these mixes in order to find optimum proportions.
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