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首页> 外文期刊>Cement & concrete composites >Predicting long-term durability of steel reinforced concrete with calcium nitrite corrosion inhibitor
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Predicting long-term durability of steel reinforced concrete with calcium nitrite corrosion inhibitor

机译：使用亚硝酸钙缓蚀剂预测钢筋混凝土的长期耐久性

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摘要

Steel reinforced concrete is one of the most durable and cost effective construction materials, but it can suffer in high chloride environments from corrosion due to chloride induced breakdown of the normal passive layer protecting the steel. One way of protecting embedded steel reinforcement from chloride induced corrosion is by the addition of corrosion inhibiting admixtures. The most widely used corrosion inhibiting admixture is calcium nitrite, due to its excellent inhibitor properties and its benign effect on concrete properties. One advantage to calcium nitrite is that its protection mechanism is well defined. In this paper data are presented that show the levels of chloride to which given levels of calcium nitrite will protect. Furthermore, it will be shown that once corrosion initiates, the rates are lower with calcium nitrite present. Finally, it is demonstrated how these results can be used by the design engineer in an integrated durability model to produce reinforced concrete structures with durabilities in excess of 50-100 years.
机译：钢筋混凝土是最耐用和最具成本效益的建筑材料之一，但在高氯化物环境中，由于氯化物引起的保护钢的常规钝化层击穿，它会遭受腐蚀。保护嵌入的钢筋不受氯腐蚀的一种方法是添加缓蚀剂。最广泛使用的缓蚀剂是亚硝酸钙，这归因于其优异的缓蚀性能和对混凝土性能的良性影响。亚硝酸钙的一个优点是其保护机制已明确定义。本文提供的数据显示了给定水平的亚硝酸钙可以保护的氯化物水平。此外，将表明一旦腐蚀开始，存在亚硝酸钙时，腐蚀速率会降低。最后，证明了设计工程师如何在集成的耐久性模型中使用这些结果来生产耐久性超过50-100年的钢筋混凝土结构。

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