Журнал геологии и геофизики
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Utilisation of Fly Ash and Rice Husk in Soil Stabilization

Shwetha Prasanna*

Soil stabilisation is the process of changing certain soil properties through different techniques, chemical, physical or mechanical, in order to enhance the soil sample, which has the most engineering properties needed. In the present study, the soil samples were stabilised by fly ash and rice husk ash wastes, which contribute a major part in increased disposal problems. In the present study fly ash and rice husk ash and the combination of fly ash and rice husk ash was added in varying percentages such as 5%, 10%, 15%, 20% and 25% to improve the soil properties. Different laboratory tests such as compaction, box shear, liquid limit and plastic limit tests were carried on soil samples. Maximum dry density and optimum moisture content with varying percentages of fly ash, rice husk ash, and fly ash and rice husk ash combinations have been found to be increased compared to unreinforced soil. Compared to unreinforced soil, the cohesion (C) and internal friction angle (Ø) of the soil with differing percentages of fly ash, rice husk ash and the mixture of fly ash and rice husk ash have decreased. It has been concluded that with the addition of fly ash and rice husk ash and the combination of fly ash and rice husk ash, some soil properties can be improved.