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首页> 外文期刊>Journal of materials in civil engineering >Corrosion-Inhibiting Systems for Durable Concrete Bridges. I: Five-Year Field Performance Evaluation
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Corrosion-Inhibiting Systems for Durable Concrete Bridges. I: Five-Year Field Performance Evaluation

机译：耐用混凝土桥梁的腐蚀抑制系统。 I：五年现场绩效评估

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摘要

The performance of nine commercially available corrosion-inhibiting systems for use in reinforced concrete structures exposed to corrosive environments was assessed in the field on bridge barrier walls and in accelerated electrochemical cells in the laboratory. The corrosion-inhibiting systems included concrete admixtures, reinforcing steel coatings, and/or concrete surface coatings/sealers. The results of this study are presented in two companion papers, in which the field evaluation and laboratory investigation are reported. The field evaluation consisted of annual corrosion surveys of half-cell potential and corrosion rate, as well as remote monitoring with embedded instrumentation for the measurement of the environmental conditions. After five years of investigation, the system containing an inorganic-based admixture performed better than others in reducing the risk of reinforcement corrosion in the barrier wall. It was also found that the system using epoxy-coated reinforcement showed good early performance during the first year, but after, the risk of corrosion increased relatively faster than in other systems, possibly due to localized pitting corrosion developing in small defects or pores of the epoxy coating.
机译：在实验室的桥梁防渗墙和加速电化学池中，对九种用于腐蚀环境下的钢筋混凝土结构的商用缓蚀系统的性能进行了评估。缓蚀系统包括混凝土外加剂，钢筋涂层和/或混凝土表面涂层/密封剂。这项研究的结果在两篇随附的论文中进行了介绍，其中对现场评估和实验室研究进行了报道。现场评估包括对半电池电位和腐蚀速率的年度腐蚀调查，以及用于测量环境条件的嵌入式仪器的远程监控。经过五年的研究，包含无机基外加剂的系统在降低阻隔壁中增强腐蚀的风险方面比其他系统表现更好。还发现使用环氧涂层增强材料的系统在第一年内表现出良好的早期性能，但之后，腐蚀风险的增加速度比其他系统要快，这可能是由于局部缺陷腐蚀在细小缺陷或孔中形成所致。环氧涂料。

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