Abstract While fiber-reinforced concrete has been proposed for corrosion damage control of reinforced concrete, long-term behavior of these composites remains largely uninvestigated. In this study, reinforced concrete and reinforced hybrid fiber-reinforced concrete (HyFRC) were subjected to a chloride environment for 2.2 years. Samples were mechanically loaded prior to chloride exposure to induce varied matrix cracking characteristics. When precracked, the time to corrosion initiation is correlated to flexural stiffness degradation. After corrosion initiation, fiber reinforcement restricts corrosion-induced cracking, causes more extensive diffusion of corrosion products into the cementitious matrix, and lowers overall mass loss of steel reinforcing bars. The mechanical responses of corroded samples are also reported.

中文翻译：

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基体开裂和混合纤维增强对钢筋混凝土腐蚀萌生和扩展行为的影响

摘要 虽然纤维增强混凝土已被提议用于钢筋混凝土的腐蚀损伤控制，但这些复合材料的长期行为在很大程度上仍未得到研究。在这项研究中，钢筋混凝土和钢筋混合纤维增强混凝土 (HyFRC) 在氯化物环境中放置了 2.2 年。在接触氯化物之前对样品进行机械加载，以诱导不同的基质开裂特性。当预裂时，腐蚀开始的时间与弯曲刚度退化相关。腐蚀开始后，纤维增强材料限制腐蚀引起的开裂，使腐蚀产物更广泛地扩散到水泥基体中，并降低钢筋的整体质量损失。还报告了腐蚀样品的机械响应。