Date of Publication :31st January 2022

Abstract: Contamination of soil is one of the major concern in the country like India. The rate of soil contamination has increased in past years due to the development activity. Soil is one of the natural construction material, which is used in excess. The properties of soil play a vital role in its strength and stiffness, used in the construction activities. Due to the improper soil waste management, the soil is being contaminated and are ineffective as construction material. There isa need of finding the replacement materials for the construction activities along with using the already existing materials by modifying its property to suit the requirements. The present study is focused on the assessment of terrasil as a stabilizer in the improvement of contaminated soil. Laboratory tests were conducted to examine the strength properties of soil using standard compaction test and unconfined compression strength(UCS). The results for STP concluded that at 0.5% of terrasil a maximum dry density of 16.57kN/m3 and Optimum moisture content of 18.65% was achieved and was found to be the optimum value to be used as effective soil stabilizer. The UCS test results concluded that terrasil at 1% achieved the maximum value of 732.56MPa, 1380.06MPa and 1389.0 MPa for 0th, 7th day and 21st day respectively. The CBR test results concluded that terrasil at 1% achieved the optimum value of 29.4% and 10.2% for unsoaked and soaked condition. The outcome of the research work highlights that 1% terrasil has achieved the optimum stabilizer for contaminated soil and hence, terrasil acts as a strong stabilizer by giving highstrength to soil, further providing the usage of contaminated soil for construction of subgrade in pavements.

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