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Published: Građevinar 77 (2025) 8
Paper type: Scientific research paper
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Corrosion deterioration mechanism of fiber-reinforced concrete based on macro- and micro-scale analysis

Ya Yin, Lan Qiao, Linbo Song, Qingwen Li, Miao Mian, An Luo

Abstract

This study systematically investigated the mechanical response and microstructural characteristics of polypropylene fiber-reinforced concrete with prefabricated cracks under simulated field and laboratory corrosion conditions. Six corrosion scenarios were designed based on a C40 concrete mix. Through mechanical testing, digital image correlation, and microstructural characterization, we found that a polypropylene fiber content of 0.3 wt% markedly enhances compressive strength and suppresses lateral deformation, while excessive fiber content leads to performance deterioration due to increased porosity. Higher corrosion concentrations induced a decline in the elastic modulus, although the fiber network mitigated stiffness degradation. Prefabricated cracks promoted the propagation of mixed-mode I–II fractures, with severe corrosion environments significantly increasing microcrack density and advancing the onset of critical strain zones. Microstructural analysis revealed that SO₄²-/Cl- corrosion decomposes C-S-H gel, generating gypsum, ettringite, and Friedel’s salt. This study provides a multiscale theoretical foundation for the corrosion-resistant design and service-life prediction of support structures in deep mining from both macro- and microscale perspectives.

Keywords
fiber reinforced concrete, corrosion deterioration, prefabricated cracks, mechanical properties, DIC, microstructure

HOW TO CITE THIS ARTICLE:

Yin, Y., Qiao, L., Song, L., Li, Q., Mian, M., Luo, A.: Corrosion deterioration mechanism of fiber-reinforced concrete based on macro- and micro-scale analysis, GRAĐEVINAR, 77 (2025) 8, pp. 757-768, doi: https://doi.org/10.14256/JCE.4153.2024

OR:

Yin, Y., Qiao, L., Song, L., Li, Q., Mian, M., Luo, A. (2025). Corrosion deterioration mechanism of fiber-reinforced concrete based on macro- and micro-scale analysis, GRAĐEVINAR, 77 (8), 757-768, doi: https://doi.org/10.14256/JCE.4153.2024

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This paper is licensed under a Creative Commons Attribution 4.0 International License.
Authors:
4153 A1 WEB
Ya Yin
University of Science and Technology Beijing
Faculty of Resources and Security Engineering
photo QIAO LAN
Lan Qiao
University of Science and Technology Beijing
Faculty of Resources and Security Engineering
4153 A3 WEB
Linbo Song
University of Science and Technology Beijing
Faculty of Resources and Security Engineering
4153 A4 WEB
Qingwen Li
University of Science and Technology Beijing
Faculty of Resources and Security Engineering
4153 A5 WEB
Miao Mian
University of Science and Technology Beijing
Faculty of Resources and Security Engineering
4153 A6 WEB
An Luo
University of Science and Technology Beijing
Faculty of Resources and Security Engineering