Splitting Tensile Strength of Fiber-Reinforced and Biocemented Sand
Publication: Journal of Materials in Civil Engineering
Volume 31, Issue 9
Abstract
This technical note examines the splitting tensile strength properties of natural sand treated with polyvinyl acetate (PVA) fiber in combination with biocementation using the microbially induced calcite precipitation (MICP) process. Ottawa 20-30 sand was mixed with PVA fiber at five different fiber ratios (0.0%, 0.2%, 0.4%, 0.6%, and 0.8% by weight) and then stabilized using urease-producing bacteria plus urea and calcium chloride () solutions. Splitting tensile strength was determined for the treated sand samples. The results showed that the splitting tensile strength and splitting secant elastic modulus increased with increasing in either calcium carbonate content or fiber ratio. The use of PVA fibers together with MICP treatment could also increase the failure strain and the postfailure splitting tensile strength.
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Acknowledgments
This study forms part of a collaboration between Nanyang Technological University, Singapore, and Iowa State University. We would like to acknowledge that part of this study is supported by the project “Biogrouting for Underground Construction (Grant No. SUL2013-1)” from the Ministry of National Development Research Fund on Sustainable Urban Living, Singapore.
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Published In
Journal of Materials in Civil Engineering
Volume 31 • Issue 9 • September 2019
Copyright
©2019 American Society of Civil Engineers.
History
Received: Oct 4, 2018
Accepted: Mar 28, 2019
Published online: Jun 21, 2019
Published in print: Sep 1, 2019
Discussion open until: Nov 21, 2019
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