Behavior of a Fiber-Reinforced Bentonite at Large Shear Displacements
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Volume 132, Issue 11
Abstract
The behavior of a polypropylene fiber-reinforced bentonite was evaluated at large shear displacements by a series of ring shear tests carried out at normal stresses varying between 20 and . Bentonite/polypropylene fiber composites were molded at an initial moisture content of 170%, with fiber lengths of 12 or . The fiber thickness was and the fiber content was either 1.5 or 3% by dry weight. The inclusion of randomly distributed fibers increased the peak shear strength of the bentonite, but the increase in strength deteriorated at large displacements and the residual strengths of both the nonreinforced and fiber-reinforced bentonite were similar. The peak shear strength was found to increase both with increasing fiber length and content. The fibers were exhumed after testing and it was found that the fibers had both extended and broken, with a predominance of broken fibers.
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Acknowledgments
The writers wish to express their gratitude to PRONEX/FAPERGS (Process No. UNSPECIFIED04/0841.0) and to CNPq–Brazilian Council of Scientific and Technological Research (Projects Pós-Doutorado No Exterior No. UNSPECIFIED200957/2005-8, Produtividade em Pesquisa No. UNSPECIFIED300832/2004-4, and Edital Universal No. UNSPECIFIED472643/2004-5) for their financial support to the research group.
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Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 132 • Issue 11 • November 2006
Pages: 1505 - 1508
Copyright
© 2006 ASCE.
History
Received: Jul 19, 2005
Accepted: May 18, 2006
Published online: Nov 1, 2006
Published in print: Nov 2006
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