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http://dx.doi.org/10.5762/KAIS.2017.18.12.697

Evaluation of flexural performance of high performance fiber reinforced cementitious composites according to fiber shape, aspect ratio and volume fraction  

Park, Gi-Joon (Korea Institute of Civil Engineering and Building Technology)
Park, Jung-Jun (Korea Institute of Civil Engineering and Building Technology)
Kim, Sung-Wook (Korea Institute of Civil Engineering and Building Technology)
Lee, Jang-Hwa (Korea Institute of Civil Engineering and Building Technology)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.18, no.12, 2017 , pp. 697-704 More about this Journal
Abstract
High-Performance Fiber-Reinforced Cement Composites (HPFRCC) has outstanding durability, and has attracted interest because of its ductility and development of strength, which allows a reduction of the self-weight of a structural member by substantially decreasing the cross section. Therefore, the present study aimed to improve the economic efficiency of HPFRCC by examining experimentally the flexural performance considering various characteristics of the steel fiber. To find an efficient fiber reinforcement method, the flexural performance was evaluated for different shapes, aspect ratios, and volume ratios of the steel fiber. Straight, hooked, and twisted fiber configurations were considered by adopting a fiber length longer than the usual 13 mm. The test results showed that HPFRCC reinforced by 19.5 nun-long straight fibers with a volume fraction of 1.5% shows better flexural performance than that reinforced by 13 mm-long straight fibers with a volume fraction of 2.0%. Consequently, HPFRCC with enhanced economic efficiency can be produced by adopting a reduced amount of steel fiber.
Keywords
Fiber aspect ratio; Fiber shape; Fiber volume fraction; Flexural performance; HPFRCC;
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