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Geomechanics and Engineering Volume 32, Number 4, February25 2023 , pages 361-373 DOI: https://doi.org/10.12989/gae.2023.32.4.361 |
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Compressive and tensile strength behaviors of sand reinforced with fibers and natural Para rubber |
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Sommart Swasdi, Arsit Iyaruk, Panu Promputtangkoon and Arun Lukjan
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| Abstract | ||
| This study aimed to investigate the engineering properties and mechanical behaviors of polymer-fibers treated sand. Para rubber (PR), natural fiber (NF), and geosynthetic fiber (GF) were used to reinforce poorly graded sand. A series of unconfined compressive and splitting tensile strength tests were performed to analyze the engineering behaviors and strength enhancement mechanism. The experiment results indicated that the PR-fibers mixture could firmly enhance the strength properties of sand. The stress-strain characteristics and failure patterns have been changed due to the increase of PR and fibers content. The presence of PR and fibers strengthened the sand and enhanced the stiffness and ductility behavior of the mixture. The stiffness of reinforced sand reaches an optimum state when both NF and GF are 0.5%, while the optimum PR contents are 20% and 22.5% for the mixture with NF and GF, respectively. An addition of PR and fiber into sand contributed to increasing interlocking zone and bonding of PR-sand interfacial. | ||
| Key Words | ||
| biopolymer; fiber-reinforcement; geosynthetic fiber; natural fiber; Para rubber | ||
| Address | ||
| Sommart Swasdi, Arsit Iyaruk, Panu Promputtangkoon and Arun Lukjan: Department of Civil Engineering, Faculty of Engineering, Rajamangala University of Technology Srivijaya 1 Ratchdamnoennok Rd, Boyang Sub-district, Muang District, Songkhla 90000, Thailand | ||