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The long-term corrosion behavior of steel bar embedded in sea-sand ultrahigh-performance concrete (UHPC) with different prefabricated crack widths immersed in pure water is investigated. The experimental results show that the initial matrix alkalinity and pore structure of UHPC are optimized by the incorporation of sea-sand. Regardless of the endogenous chloride ion and crack widths, the corrosion current density (icorr) of the reinforcement embedded in UHPC remains extremely low. The EIS measurement shows that the sea-sand UHPC exhibits high matrix resistance (Rc) and charge transfer resistance (Rct). Furthermore, the electric double layer capacitance (CPEdl) values of rebar are less than 50 μF·cm-2, indicating that the embedded steel bar remain in the passivation state. Additionally, after 180 days of immersion in pure water, the sea-sand UHPC still has excellent resistance to reinforcement pitting corrosion. © 2025 American Society of Civil Engineers.
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Journal of Materials in Civil Engineering
ISSN: 0899-1561
Year: 2025
Issue: 9
Volume: 37
3 . 1 0 0
JCR@2023
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ESI Highly Cited Papers on the List: 0 Unfold All
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