Influence of Optimized Tire Shreds on Shear Strength Parameters of Sand
Publication: International Journal of Geomechanics
Volume 5, Issue 1
Abstract
This paper presents the usefulness of optimizing the size of waste tire shreds on shear strength parameters of sand reinforced with shredded waste tires. A relatively, uniform sand has been mixed with randomly distributed waste tire shreds with rectangular shape and compacted at 2° of compaction. Waste tire shreds were prepared with a special cutter in three widths of 2, 3, and and various lengths for each shred width. Three shred contents of 15, 30, and 50% by volume were chosen and mixed with the sand to obtain a uniformly distributed mixture. In order to compare the shear strength of different sand–tire shred samples, two compaction efforts in terms of sand matrix unit weights of 15.5 and were considered. The results show that the influencing parameters on shear strength characteristics of sand–shred mixtures are normal stress, sand matrix unit weight, shred content, shred width, and aspect ratio of tire shreds. With the selected widths of shreds, compaction efforts, shred contents, and the variations of aspect ratios, it is possible to increase the initial friction angle up to 113.5%, that is . The average value for the influence of aspect ratio variations on increase in friction angle of the mixtures for all tests has been found to be about 25%. These average values for lower and higher compacted samples containing different widths and aspect rations were 37.6 and 17.2%, respectively. It has been investigated that for a given width of tire rectangular shreds, there is solely a certain length, which gives the greatest initial friction angle for sand–tire shred mixtures. This is the main contribution of this paper.
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Acknowledgment
The writers wish to thank the Organization of Management and Planning of Isfahan Province for the financial support provided for this study.
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Information & Authors
Information
Published In
International Journal of Geomechanics
Volume 5 • Issue 1 • March 2005
Pages: 58 - 65
Copyright
© 2005 ASCE.
History
Received: Jan 25, 2002
Accepted: Dec 5, 2003
Published online: Mar 1, 2005
Published in print: Mar 2005
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