Dynamic Properties of Saturated Sands Mixed with Tyre Powders and Tyre Shreds

摘要

This study examined the effect of adding tyre powders and tyre shreds on the liquefaction potential of loose saturated sandy soil. Also, the dynamic properties of reinforced soil such as the damping ratio and shear modulus were investigated. To this end, a series of 1-g shaking table model tests were carried out at different percentages of sand-tyre powders and sand-tyre shreds mixtures. The results showed that the use of tyre powders and tyre shreds decreases pore-water pressure due to liquefaction. Maximum shear modulus of reinforced soil increased with the increase in tyre powder content in the mixture. However, an increased percentage of tyre shreds had no noticeable effect on maximum shear modulus. Furthermore, the mean damping ratio increases with the increase in tyre powder content in the specimens. Therefore, as the percentage of tyre shreds is increased up to 10%, the mean damping ratio experiences an increasing trend. Nevertheless, at values above 10%, the mean damping ratio reduces. In general, reinforcing soil with tyre powders and tyre shreds reduces the deformations caused by liquefaction.