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Advances in Materials Science and Engineering
Volume 2017 (2017), Article ID 2370763, 9 pages
https://doi.org/10.1155/2017/2370763
Research Article

The Effect of Polymer-Fiber Stabilization on the Unconfined Compressive Strength and Shear Strength of Sand

School of Earth Sciences and Engineering, Hohai University, Nanjing 210098, China

Correspondence should be addressed to Jin Liu

Received 26 April 2017; Revised 17 July 2017; Accepted 26 July 2017; Published 24 August 2017

Academic Editor: Belal F. Yousif

Copyright © 2017 Jin Liu et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The mixed soil stabilizer of polyurethane organic polymer and polypropylene fiber was used to reinforce sand. The unconfined compressive test and direct shear test were carried out to evaluate the effects of polymer-fiber reinforced sand. The different contents of polymer and fiber were selected for the tests. The test results indicated that polymer-fiber mixture can improve strongly the strength of sand. The presence of polyurethane organic polymer enhances sand structural stability and the best composition of polymer and fiber was 4% and 0.2–0.3% of dry sand, respectively. Based on the test results and images of scanning electron microscope (SEM), the reinforcement mechanism was analyzed. The research results can be considered as the reference for sand reinforced engineering.