Applicability of fiber reinforced self-compacting concrete for tunnel lining |
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Authors: | K Ahangari M H A Beygi Y Rezaei |
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Institution: | 1. Department of Mining Engineering, Science and Research Branch, Islamic Azad University, Toward Hesarak, End of Ashrafi Esfahani, Poonak Square, Tehran, Iran, PO Box 14515/775 and 14155/4933, 1477893855 2. Civil Engineering Faculty, Babol Nooshirvani University of Technology, Dr. Shariati Street, Babol, Mazandaran, Iran, P.O. Box: 484
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Abstract: | Nowadays, self-compacting concrete is used in reinforced concrete structure with heavy bars. This type of concrete is widely accepted throughout the world; therefore, it can be used as an attractive solution for inner lining of tunnels. Regarding the effect of fibers in improving the concrete properties the effect of using polypropylene fiber on the behavior of arch specimens are investigated in laboratory. Therefore, specimens with dimensions of 1 m diameter, 0.5 m width, and 10 cm thickness with various reinforcing bars in arch forms were prepared and their flexural strength was investigated. The results show high ability of self-compacting concrete for the inner coverage of tunnels and its increasing strength is due to use of fibers. In addition, the results indicate that by adding fibers in the amount of 0.1 % of cement weight and reinforcing bars of size number 10, the required flexural strength would be obtained. |
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