Mechanical and Interfacial Properties of Waste Tire Soil Composite

Abstract

This paper studied the properties of waste tire-soil composite to explore the mechanism and structure performance of tire soil retaining wall. The unconfined compressive test was conducted for tire-soil composite unit to obtain the axial and lateral stress-stain relationships and the elastic modulus. Based on these properties, the deformation characteristics of tire-soil composite under certain pressure could be calculated. The interfacial friction between two tire-soil composite units were investigated by the direct shear test. Based on the shear stress-stain curves, the ultimate friction force under different principle stress, friction angle, and other parameters were derived. Test results show that the compressive strength and shear strength of the tire-soil composite structure have been improved compared with that of the natural soil. The experimental results can provide reasonable mechanical parameters and reference for the application of waste tire-soil retaining wall in practical engineering.