ENHANCEMENT OF SUB GRADE SOIL BY USING FLYASH AND LIME

ENHANCEMENT OF SUB GRADE SOIL BY USING FLYASH AND LIME

G Mahitha 1, M Nithisha2, K Taruni Sai3, G Pavan Teja4

1 Department of Civil Engineering & Andhra Loyola Institute of Engineering & Technology

2 Department of Civil Engineering & Andhra Loyola Institute of Engineering & Technology

3 Department of Civil Engineering & Andhra Loyola Institute of Engineering & Technology

4 Department of Civil Engineering & Andhra Loyola Institute of Engineering & Technology

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Abstract -In India 15% of land is covered by Black Cotton Soil. The presence of montmorillonite clay mineral in the Expansive soil causes Swelling and shrinking properties which leads to major problems in Construction sites. This can be resolved by using soil stabilization techniques which enhances the engineering properties of soil. The soil stabilization is most important for the construction which is widely used in pavements or any other structures on expansive soil. Utilization of industrial waste materials in the improvement of soils is cost-efficient and eco-friendly method. In the present study an experimental investigation is taken to know the Geotechnical Characteristics of Expansive Soil with the Combination of FLYASH and LIME. In this study soil is mixed with the different proportions of (10%,20%,30% & 40%) FLYASH and (2.5%,5%,7.5%,10%,12.5% & 15%) LIME. The strength gained by soil is investigated by conducting California bearing ratio test & it is also calculated to reduce the thickness of the layer. The maximum dry density increased from 1.38g/cc to 1.54g/cc. The CBR un soaked test value enhances from 1.01% to 6.49% respectively

Key Words: Black Cotton Soil, Fly ash, Lime, Compaction, maximum dry density, CBR