Abstract
The adoption of natural fiber reinforced polymer (FRP) composites as an eco-friendly substitute for synthetic FRPs in structural strengthening applications is gaining substantial momentum. This study delves into the effectiveness of jute fabric reinforced epoxy composites in bolstering the flexural strength of impaired concrete beams. An array of variables, encompassing the number of fabric layers (ranging from 1 to 3), fiber heat treatment, externally bonded reinforcement (EBR) configuration (soffit vs. U-shape), and fiber type (jute vs. glass), underwent systematic scrutiny. The comprehensive analysis of 30 pre-cracked high-performance concrete beams yielded compelling findings. In particular, the application of heat-treated jute EBR, especially when employing two or three layers, resulted in significant increases in peak loads, translating to improvements ranging from 85 to 120% when compared to the control beam. This treatment significantly improves the bond between the fibers and the matrix, consequently enhancing the structural performance. Notably, jute composites can attain equivalent strengthening performance compared to glass FRP while offering substantial cost savings and significantly reducing carbon emissions, rendering them a more environmentally sustainable and economically viable choice.
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Acknowledgements
The authors would like to express their gratitude to the Civil Engineering Laboratory at the University of Bordj Bou Arreridj for facilitating the experimental work in this study, as well as to the 'Microscopies and Analyse’s imaging center, I-Mat Federation (FR4122) at CY Cergy Paris University (France) for conducting the SEM analyses.
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Benaddache, L., Belkadi, A.A., Kessal, O. et al. Comparative study on externally bonded heat-treated jute and glass fiber reinforcement for repair of pre-cracked high performance concrete beams. Archiv.Civ.Mech.Eng 24, 82 (2024). https://doi.org/10.1007/s43452-024-00899-5
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DOI: https://doi.org/10.1007/s43452-024-00899-5