EXPERIMENTAL INVESTIGATION ON CALIFORNIA BEARING RATIO FOR MECHANICALLY STABILIZED EXPANSIVE SOIL USING WASTE RUBBER TYRE CHIPS

Soil stabilization is any process which improves thephysical properties of soil, such as increasing shear strength, bearingcapacity etc. which can be done by use of controlled compaction or addition ofsuitable admixtures like cement, lime and waste materials like phosphogypsum,etc. The cost of introducing these additives has also increased in recent yearswhich opened the door widely for the development of other kinds of soiladditives such as plastics, bamboo, fly ash etc. This new technique of soilstabilization can be effectively used to meet the challenges of society, toreduce the quantities of waste, producing useful material from non-useful wastematerials. This paper involves the detailed study on the possibleuse of waste rubber tyre chips and lime for soil stabilization. The analysiswas done by conducting wet sieve analysis, compaction test and CBR by replacingthe soil with lime and waste rubber tyre chips. The optimum percentage of wasterubber tyre chips and lime in soil was found out by California Bearing RatioTest. The amount of waste rubber tyre chips has significant effect on theenhancement of strength of the soil.