MECHANICAL STABILIZATION OF SUB-GRADE SOIL USING TEXTILE WASTE SALT

摘要

© 2022, Scibulcom Ltd. All rights reserved.This study aims to solve the problems faced due to expansive soil in road constructions and find a way to use the textile waste salt, which is dumped in landfills. Mechanical stabilization is adopted in this study to counteract the expansive nature of the virgin soil. The waste material used in this study is obtained from the effluent treatment of the dying industry after recovery of 85% of the salt. In this study the virgin soil (Liquid limit = 42%, Plasticity Index = 22%, hence Classified as CI) is mixed with the waste salt (Non-plastic) in the proportions of 90:10, 80:20, 70:30, 60:40 (Soil: Waste Salt). Optimal Moisture Content (OMC) of Virgin soil as well as all the mixes has been found out and California Bearing Ratio test has been carried out to find the optimum mix. In view of the CBR results the optimum mixes are the ones which increase the CBR value from 1.4% (Virgin Soil) to 2.49% (70:30 Mix) and to 3.46% (60:40 Mix). Flexible Pavements have been designed according to IRC37:2001 for all the mixes for both 2 msa and 10 msa and cost analysis for all the designed pavements has been carried out.