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Computers and Concrete Volume 18, Number 4, October 2016 , pages 923-936 DOI: https://doi.org/10.12989/cac.2016.18.4.923 |
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Acoustic emission characterization of the fracture process in steel fiber reinforced concrete |
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Xiong Zhou, Yuyou Yang, Xiangqian Li and Guoqing Zhao
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| Abstract | ||
| The correlation between the characteristics of acoustic emission signals and the strength parameters of concretes is investigated by combining the acoustic emission (AE) technique and steel fiber reinforced concrete (SFRC). By means of AE detection system, three kinds of steel fibers of varying content were used as reinforcement in concrete and their influence on the fracture process and the acoustic activity was considered in this paper. Analysis of the AE test results revealed that for different steel fiber contents, the role of steel fiber is different. Concave-convex steel fiber has an inhibitory effect on the control of crack expansion. Bow steel fiber has a better effect on the control of crack propagation when the fiber content is lower. The compressive strength of SFRC decrease when bow steel fiber content rises. Ultra-short can prevent early cracks of concrete. | ||
| Key Words | ||
| acoustic emission; steel fiberreinforced concrete; steel fiber content; AE events column graph | ||
| Address | ||
| Xiong Zhou, Yuyou Yang, Xiangqian Li and Guoqing Zhao: School of Engineering and Technology, China University of Geosciences (Beijing), Beijing 10083, China | ||