Effect of Chemical Stabilisation in Clayey Soil for Strength and Durability Characteristics

The use of locally available materials plays an important role in reducing the cost and environmental benefits. It can be such as wastes from industries, plastic fibre, natural fibres, etc. Such materials are found to be effective in the stabilisation process of soils which are having poor geotechnical properties. These materials improve the soil strength by changing the properties and also will be advantageous in reducing the cost of road construction. In the present study, soft clay soil has been considered for its strength and durability assessment. The use of low calcium fly ash (FA) obtained from thermal plants has been used for the stabilisation process. It was mixed with cement in different ratios as per AASHTO guidelines to evaluate the strength and durability parameters. The clayey soil was assessed for the initial consumption of lime (ICL) to reduce the plastic nature. The cylindrical soil samples were prepared and subjected to unconfined compressive strength (UCS) and California bearing ratio (CBR) tests for strength evaluation. The wetting and drying test method was used for durability analysis. The results revealed that the use of fly ash had led to a significant increase in the strength of the soil. The UCS value was so high that it could be a replacement for the GSB layer of rural roads. The CBR test reported a substantial increase in the value by the stabilisation technique. It can be concluded that the thickness of the pavement ca n be reduced significantly. Also, the results showed a magnificent increase in the durability percentage of the prepared samples.