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Advances in Materials Science and Engineering
Volume 2017 (2017), Article ID 5240186, 14 pages
https://doi.org/10.1155/2017/5240186
Research Article

Study on the Permeability Characteristics of Polyurethane Soil Stabilizer Reinforced Sand

1School of Earth Sciences and Engineering, Hohai University, Nanjing 210098, China
2CSIR-Central Building Research Institute (CBRI), Roorkee 247667, India

Correspondence should be addressed to Jin Liu; moc.361@029uilnij

Received 21 January 2017; Revised 28 February 2017; Accepted 6 March 2017; Published 20 April 2017

Academic Editor: Charles C. Sorrell

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

A polymer material of polyurethane soil stabilizer (PSS) is used to reinforce the sand. To understand the permeability characteristics of PSS reinforced sand, a series of reinforcement layer form test, single-hole permeability test, and porous permeability test of sand reinforced with PSS have been performed. Reinforcement mechanism is discussed with scanning electron microscope images. The results indicated that the permeability resistance of sand reinforced with polyurethane soil stabilizer is improved through the formation of reinforcement layer on the sand surface. The thickness and complete degree of the reinforcement layer increase with the increasing of curing time and PSS concentration. The water flow rate decreases with the increasing of curing time or PSS concentration. The permeability coefficient decreases with the increasing of curing time and PSS concentration and increases with the increasing of depth in specimen. PSS fills up the voids of sand and adsorbs on the surface of sand particle to reduce or block the flowing channels of water to improve the permeability resistance of sand. The results can be applied as the reference for chemical reinforcement sandy soil engineering, especially for surface protection of embankment, slope, and landfill.