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Open AccessArticle

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

1
School of Civil Engineering, Architecture and Environment, Hubei University of Technology, Wuhan 430068, China
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State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China
3
Department of Civil, Environmental and Geomatic Engineering, University College London-UCL, London WC1E 6BT, UK
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Department of Civil & Environmental Engineering, National University of Singapore, Engineering Drive, Singapore 119576, Singapore
*
Author to whom correspondence should be addressed.
Academic Editors: Andy Fourie and Francesco Colangelo
Materials 2017, 10(7), 707; https://doi.org/10.3390/ma10070707
Received: 17 April 2017 / Revised: 19 June 2017 / Accepted: 22 June 2017 / Published: 27 June 2017
(This article belongs to the Special Issue Geosynthetics in Civil and Environmental Engineering)
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. View Full-Text
Keywords: waste tires; reinforced soil; pull-out tests; geogrid; load displacement behavior; frictional resistance; interface properties; rubber waste tires; reinforced soil; pull-out tests; geogrid; load displacement behavior; frictional resistance; interface properties; rubber
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Li, L.-H.; Chen, Y.-J.; Ferreira, P.M.V.; Liu, Y.; Xiao, H.-L. Experimental Investigations on the Pull-Out Behavior of Tire Strips Reinforced Sands. Materials 2017, 10, 707.

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