Pull-Out Performance of Anchored Carbon-Fiber Bundles in Cementitious Matrix
Publication: Journal of Composites for Construction
Volume 25, Issue 6
Abstract
In fabric-reinforced cementitious matrix (FRCM) systems, one technique to increase the strengthening efficiency is to utilize the deformability of dry fiber bundles and anchor them at their ends. In this study, the effectiveness of anchored carbon fiber bundles was thoroughly investigated through pull-out tests of 220 specimens and corresponding microstructural analyses. The results show that the peak pull-out load can be increased by up to 165% after anchoring the fiber bundles, and the dominant failure mode shifts from fiber pull-out to fiber rupture. Parametric analyses show that a larger anchorage angle and a larger total embedded length help to increase the pull-out strength, while a proper combination of the bonded length and the anchorage length is essential for high strengthening efficiency. Further microstructure analyses suggest that these improvements are primarily attributed to the additional constraint at the anchorage point, and the anchorage length is critical for the pull-out behavior.
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Acknowledgments
The financial supports from the Key-area Research and Development Program of Guangdong Province (2019B111107002) and the National Natural Science Foundation of China (52078454/51878604/51820105012) are gratefully acknowledged.
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Published In
Journal of Composites for Construction
Volume 25 • Issue 6 • December 2021
Copyright
© 2021 American Society of Civil Engineers.
History
Received: Mar 19, 2021
Accepted: Sep 11, 2021
Published online: Oct 13, 2021
Published in print: Dec 1, 2021
Discussion open until: Mar 13, 2022
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Cited by
- Yusen Wu, Zhiyu Xie, Dawei Zhang, Jihua Zhu, Haixuan Li, Uniaxial Tensile Behavior of Anchored Carbon Fabric-Reinforced Cementitious Matrix Plates, Journal of Materials in Civil Engineering, 10.1061/JMCEE7.MTENG-14941, 35, 8, (2023).