Abstract
The behavior of steel fiber-reinforced concrete (SFRC) exposed to simulated marine environments was investigated in this work. The cubic compressive strength as well as axial compressive and flexural properties of SFRC subjected to chloride attack was monitored over 36 months. Meanwhile, the chloride transport behavior in SFRC was also investigated. Furthermore, the effect of water-to-binder ratio (W/B), mineral admixtures, and exposure conditions on the mechanical properties and chloride transport of SFRC was analyzed. Results showed that many rust spots appeared on SFRC surfaces after 36 months of chloride attack, while the internal steel fibers remained intact despite chloride penetration depths over 20 mm. The SFRC specimens immersed in 3% NaCl solution for 36 months showed no decreases in their cubic compressive strengths, axial compressive strengths, flexural strengths and toughness as compared to unexposed specimens. However, the SFRC specimens exposed to drying-wetting cycles condition showed some slight degradations. In addition, the SFRC specimens with 20% fly ash showed higher chloride resistance than the specimens with 20% fly ash and 40% slag. This study provides more experimental data and evidences for the application of SFRC in a marine environment.
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The authors gratefully acknowledge the financial support of the National Natural Science Foundation of China (No. 51808508 and 52078468).
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Yang, L., Zhang, Z., Gao, D. et al. Mechanical property evolution and chloride transport of steel fiber-reinforced concrete exposed to simulated marine environments. Mater Struct 55, 130 (2022). https://doi.org/10.1617/s11527-021-01806-7
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DOI: https://doi.org/10.1617/s11527-021-01806-7