Analysis Of Rajkot Gujil

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Kavish S. Mehta, Rutvij J. Sonecha, Parth D. Daxini, Parth B. Ratanpara, Miss Kapilani S. Gaikwad et.al. (2014): They used black cotton soil from Rajkot Gujrat and determined various engineering properties of the black cotton soil having medium to low swelling property. They stabilized the black cotton soil by using lime. Changes in the engineering properties of the black cotton soil before and after the stabilization by lime were observed on the basis of tests such as liquid limit, plastic limit, optimum moisture content , Max. dry density and California bearing ratio. By performing all these tests they concluded that lime can be utilized for strengthening the black cotton soil and lime mixing with clay present in the black cotton soil makes the cemented material.

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They studied the improvements in the properties of expansive soil with fly ash and lime in varying percentages. They performed test such as liquid limit, standard proctor compaction, and differential free swelling test obtained on expansive clays mixed at different proportions of lime and fly ash admixture. Results shows that the stabilized clay had lesser swelling potential whereas increase in optimum moisture content had been observed. From their results it was clear that a change of the expansive soil texture took place. When lime & fly ash are mixed with the expansive soil, the Plastic limit increased by mixing lime and liquid limit decreased by mixing fly ash, which decreases plasticity index. With increase in the amount of fly ash & lime there was deduction in modified dry density & free swell index. Optimum moisture content was also reduced. From their work it is clear that the mixing expansive soil in certain proportion with lime and fly ash is an effective way to handle the problem of shrinkage, swelling and unequal

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