Swell Mitigation with Granulated Tire Rubber
Publication: Journal of Materials in Civil Engineering
Volume 23, Issue 5
Abstract
Experiments were conducted to investigate the odometric swell behavior of expansive soil specimens mixed independently with two different granular additives: silica sand and granulated tire rubber (GTR). All specimens were prepared with the same global water content. However, specimens that contained sand swelled less than did analogous specimens that contained GTR, regardless of the surcharge stress imposed before inundation. Phase relationship analyses based on “oversize correction” equations derived for mixtures with three solid phases indicate that the specimens possessed clay portions with different dry density and initial water content. Such differences are attributed mainly to the role of additive grain stiffness during specimen preparation. Results from complementary discrete element method simulations indicate that the stiffness of the additive grains may also play a role in mitigating the swell via contact force alterations upon swell.
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Acknowledgments
This research project was sponsored in part by the National Science Foundation and the San Diego State University Research Foundation. The writers acknowledge the participation of Reza Mortezaie in the preliminary stages of the project.
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Information
Published In
Journal of Materials in Civil Engineering
Volume 23 • Issue 5 • May 2011
Pages: 721 - 727
Copyright
© 2011 American Society of Civil Engineers.
History
Received: Feb 24, 2010
Accepted: Nov 9, 2010
Published online: Nov 11, 2010
Published in print: May 1, 2011
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