Stabilization of Black Cotton Soil by Using Terrazyme Chemical

In developing countries like India the most important requirement of any project after performance criteria is its economical , feasibility and serviceability criteria .The traditional methods are not economically feasible also time consuming .Hence , it has created a need to discover the other possible ways to satisfy the performance as well as economical criteria .The present paper describes a study carried out to check the improvements in the properties of black cotton soil ( BCS ) and red soil ( RS ) with a bio -enzyme , named Terrazyme .Bio -enzyme improves the engineering qualities of soil , facilitates higher soil compaction densities and increases stability .Bio -enzyme helps in easy mixing with water at optimum moisture content ( OMC ) and then it is sprayed over soil and compacted .Soil with varying index properties have been tested for virgin as well as stabilized soil with different dosages .The test results indicate that stabilization improves the soil strength up to great extent , which implies that the bearing capacity and the resistance to deformation increases in stabilized soil .The locally available material can be used , and in case of scarcity of granular material , only bio -enzyme stabilized thin bituminous surfacing can fulfill the pavement design requirement .Adopting the IRC method based on soil CBR , the pavement design thickness on stabilized soil also reduces 25 to 40 percent .The use of bio-enzyme in soil stabilization is not very popular due to lack of awareness between engineers and non -availability of standardized data.