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Materials (Basel). 2017 Jun 27;10(7). pii: E707. doi: 10.3390/ma10070707.

Experimental Investigations on the Pull-Out Behavior of Tire Strips Reinforced Sands.

Author information

1
School of Civil Engineering, Architecture and Environment, Hubei University of Technology, Wuhan 430068, China. lilihua466@163.com.
2
State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China. lilihua466@163.com.
3
School of Civil Engineering, Architecture and Environment, Hubei University of Technology, Wuhan 430068, China. 931031cyj@sina.cn.
4
Department of Civil, Environmental and Geomatic Engineering, University College London-UCL, London WC1E 6BT, UK. p.ferreira@ucl.ac.uk.
5
Department of Civil & Environmental Engineering, National University of Singapore, Engineering Drive, Singapore 119576, Singapore. ceeliuy@nus.edu.sg.
6
School of Civil Engineering, Architecture and Environment, Hubei University of Technology, Wuhan 430068, China. xiao-henglin@163.com.

Abstract

Waste tires have excellent mechanical performance and have been used as reinforcing material in geotechnical engineering; however, their interface properties are poorly understood. To further our knowledge, this paper examines the pull-out characteristics of waste tire strips in a compacted sand, together with uniaxial and biaxial geogrids also tested under the same conditions. The analysis of the results shows that the interlocking effect and pull-out resistance between the tire strip and the sand is very strong and significantly higher than that of the geogrids. In the early stages of the pull-out test, the resistance is mainly provided by the front portion of the embedded tire strips, as the pull-out test continues, more and more of the areas towards the end of the tire strips are mobilized, showing a progressive failure mechanism. The deformations are proportional to the frictional resistance between the tire-sand interface, and increase as the normal stresses increase. Tire strips of different wear intensities were tested and presented different pull-out resistances; however, the pull-out resistance mobilization patterns were generally similar. The pull-out resistance values obtained show that rubber reinforcement can provide much higher pull-out forces than the geogrid reinforcements tested here, showing that waste tires are an excellent alternative as a reinforcing system, regardless of the environmental advantages.

KEYWORDS:

frictional resistance; geogrid; interface properties; load displacement behavior; pull-out tests; reinforced soil; rubber; waste tires

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