Utilization of rubber tyre waste in subgrade soil

The management of scrap tires has become a growing problem in recent years. Scrap tires represent one of several special wastes that are difficult for municipalities to handle. Whole tires are difficult to landfill because they tend to float to the surface. Stockpiles of scrap tires are located in many communities, resulting in public health, environmental, and aesthetic problems. The paper presents the study carried out with crumb rubber tyre used in strengthening the subgrade. The Standard Proctor test carried out on black cotton soil showed moisture content and dry density as 18% and 2.43 respectively The CBR test has shown the range of values from 1.16 to 1.54. Therefore it is suggested that the waste crumbed tyres can be safely used in the sub grade as a soil binder which will effectively hold the soil with increased strength values.