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|Title:||Shear behavior of sand-tire bead mixtures|
|Citation:||Proceedings of International Conference on Advances in Geotechnical Engineering (ICAGE 2011): pp.615-620|
|Conference Name:||International Conference on Advances in Geotechnical Engineering (2011 : Perth, Australia)|
|An Deng, Jin-rong Feng|
|Abstract:||To enhance the shear strength and reduce the unit weight of sand backfills, tire beads were added to sand matrices. The tire beads present relatively high friction and low unit weight, which lead to a lightweight but reinforced sand-tire bead mixture. Direct shear and triaxial compression tests were conducted to observe the effects of tire beads addition and confinement on the shear behavior of the mixtures. Stress-strain characteristics were observed and simulated. It was found that peak shear strength decreases along with the increase of tire bead addition, whereas the confinement is apt to enhance the peak shear strength of the mixtures. Peak deviator and peak stress ratio are affected by tire bead addition more clearly under high confinements than under low confinements. Poisson’s ratios are associated with the tire beads addition and principal stresses. A tire bead addition of 10%-20% is able to enhance sand shear strength under confinements equal to or less than 200 kPa. The stress-strain characteristics of the mixture can be modeled by using an elastic nonlinear constitutive law.|
|Keywords:||tire beads; sand; shear behavior; Poisson’s ratio; stress-strain; modeling.|
|Rights:||Copyright status unknown|
|Appears in Collections:||Civil and Environmental Engineering publications|
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