The Compressive Strengh of Cohesive Soil Stabilized with Microbial Induced Cementation

Abstract

This research aims to evaluate the physical and mechanical characteristics of soil stablized with microbial induced cementation method. The variation of microbial induced by 4%, 6%, and 8%, while the age variations of bacterial culture of 2, 4, and, 6 days and a curing period of 3,7,14 and 28 days. The properties of the soil studied in this research are as optimum moisture content of 32.19%, dry volume weight (γd) 1.36 gr/cm3, soil density 2.63 gr/cm3, atterberg limit test liquid limit 46.89% plastic limit 31 ,94%, plasticity index 14.96% and shrinkage limit 7.49%. The compressive strength of the soil which was stabilized with 6% solution of Bacillus subtilis bacteria for 4 days found to be optimum 19.96 kg/cm2 at 28 days or an increase of 6 times from the soil was not stabilized with microbial induced 3.02 kg/cm2