Effect of addition of waste rubber on dilation angle and shear stiffens of clay

several methods are available for improving the physical and mechanical behaviour of the soils unsuitable for construction projects. These methods include compaction, consolidation, preloading, grouting, and stabilization by adding chemical materials etc. Addition of waste crumb rubber for reinforcing the soils is an appropriate method for improving the strength and bearing capacity of the soils. In addition to the improvement of soil engineering properties, the addition of waste crumb rubber is a measure for the protection of environment. In this study, the shear strength parameters of the Kaolinite clay, as the control material, and the Kaolinite clay reinforced by different percentages of two different types of crumb rubber content have been evaluated. The consolidated drained (CD) tests have been conducted on the control and crumb rubber reinforced soils. Results show that the addition of crumb rubber to the soil results in the improvement of shear strength parameters such as dilation angle and shear stiffness.