Effects of Waste Tire Granule Particles on Geotechnical Properties of Clay Soil

For improvement and stabilization of problematic soils in terms of geotechnical properties, it should be required to use proper materials. Therefore, tire chips is as new option can be suggested. On the other side, disposing of waste tire is one of the environmental problems. In present study, improving bearing capacity of kaolinite clay soil with using granule particle of tire waste (with aim of reducing environmental pollutants) based on laboratory tests have been investigated. Waste tire Granule particles in 1, 3 and 5 mm diameters and 2.5, 5, 7.5 and 10 percentage were mixed with clay. For evaluating geotechnical properties of stabilized clayey soil, compaction, uniaxial, direct shear and permeability tests were performed. Results of this study showed that, optimum of particle size and waste tire particle content are respectively 1 mm and 2.5 percentage (by weight). So that, in this values minimum void ratio significantly decreased in improved specimens. Consequently, bearing capacity and compressibility were growth. Also, with adding waste tire granule particle by a size larger than 1 mm and more 2.5 % content in improved soil, permeability went up.