High-Pressure Isotropic Compression Tests on Fiber-Reinforced Cemented Sand
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 136, Issue 6
Abstract
High-pressure isotropic compression tests were carried out on reconstituted sand samples that were reinforced with cement, randomly distributed fibers, or both, making comparisons with the unreinforced sand and conducting tests from a variety of initial specific volumes. The results indicated changes in the isotropic compression behavior of the sand due to the inclusion of fibers and/or cement. Cementitious bonds are sufficiently strong relative to the particles to allow the cemented samples to reach states outside the normal compression line (NCL) of the uncemented soil, but the effectiveness of cemented fiber-reinforced specimens is even larger due to the control of crack propagation in the cemented sand after the inclusion of fibers. Distinct NCLs were observed for the sand, fiber-reinforced sand, cemented sand, and fiber-reinforced cemented sand. Both fiber breakage and fiber extension were observed in fibers measured after testing indicating that fibers individually have worked under tension, even though in the macroscopic scale, isotropic compressive stresses were applied. Fiber reinforcement was found to reduce the particle breakage of both the uncemented and cemented sands.
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Acknowledgments
The writers wish to express their gratitude to MCT-CNPq (Projects PNPD Grant No. UNSPECIFIED558474/2008-0, Produtividade em Pesquisa Grant No. UNSPECIFIED301869/2007-3, Edital Universal Grant No. UNSPECIFIED472851/2008-0, and INCT) for the financial support to the research group. The writers would like to thank the anonymous reviewers for their insightful comments and suggestions that improved the content of this technical note.
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Information & Authors
Information
Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 136 • Issue 6 • June 2010
Pages: 885 - 890
Copyright
© 2010 ASCE.
History
Received: Sep 30, 2008
Accepted: Nov 28, 2009
Published online: Dec 4, 2009
Published in print: Jun 2010
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