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Abstract:   Soil stabilization refers to the process of enhancing physical, chemical and mechanical properties of soil to maintain its stability. In the present study, an attempt has been made to improve the engineering properties of locally available soil by making a composite mix with fly ash ,cement and coconut shell powder in appropriate proportions. A series of modified proctor compaction tests (MPT), unconfined compressive strength (UCS) tests, Shear box test and California Bearing Ratio test (CBR) were carried out. A suitable mix proportion of soil -fly ash, soil-cement, soil-coconut shell powder for various geotechnical applications like construction of embankments, low cost rural roads etc. can be obtained. The main objective of the work was to obtain an improved construction material by making the best use of locally available soil and to make the effective utilization of fly ash, cement and coconut shell powder. It is observed that with the addition of fly ash, coconut shell powder CBR values increases.CBR value is found to be maximum with the addition of 4 % of coconut shell powder to the soil. Increase in compressive strength by 50% with the addition of fly ash and cement to the soil is also observed.

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Abstract:   Soil stabilization refers to the process of enhancing physical, chemical and mechanical properties of soil to maintain its stability. In the present study, an attempt has been made to improve the engineering properties of locally available soil by making a composite mix with fly ash ,cement and coconut shell powder in appropriate proportions. A series of modified proctor compaction tests (MPT), unconfined compressive strength (UCS) tests, Shear box test and California Bearing Ratio test (CBR) were carried out. A suitable mix proportion of soil -fly ash, soil-cement, soil-coconut shell powder for various geotechnical applications like construction of embankments, low cost rural roads etc. can be obtained. The main objective of the work was to obtain an improved construction material by making the best use of locally available soil and to make the effective utilization of fly ash, cement and coconut shell powder. It is observed that with the addition of fly ash, coconut shell powder CBR values increases.CBR value is found to be maximum with the addition of 4 % of coconut shell powder to the soil. Increase in compressive strength by 50% with the addition of fly ash and cement to the soil is also observed.

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