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首页> 外文期刊>ISIJ international >Service Life Estimation of Concrete Structures Reinforced with Cr-bearing Rebars under Macrocell Corrosion Conditions Induced by Cracking in Cover Concrete
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Service Life Estimation of Concrete Structures Reinforced with Cr-bearing Rebars under Macrocell Corrosion Conditions Induced by Cracking in Cover Concrete

机译：盖层混凝土开裂引起的大单元腐蚀条件下含铬钢筋混凝土结构的使用寿命估算

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摘要

Cracked concrete members reinforced with Cr-bearing rebars were assumed for the purpose of developing Cr-bearing rebars having the required corrosion resistance in macrocell corrosion environments induced by cracking in cover concrete. The service life of concrete structures reinforced with Cr-bearing rebars was then estimated based on a macrocell corrosion rate model, and their Cr content to achieve a service life of 100 years was calculated. As a result, the service life of concrete reinforced with Cr-bearing rebars was found to increase as their Cr content increased regardless of the corrosive environment type. The calculation also revealed that Cr contents of 16% or more and 13% or more would lead to a service life of over 100 years in harsh and moderate chloride attack zones, respectively. In a carbonation zone, the Cr content to achieve a service life of over 100 years was calculated to be 9% or more.
机译：假定使用含铬钢筋加固的开裂混凝土构件是为了开发在外墙混凝土开裂引起的大单元腐蚀环境中具有所需耐腐蚀性的含铬钢筋。然后，基于宏单元腐蚀速率模型，估算了含Cr钢筋加固的混凝土结构的使用寿命，并计算了其达到100年使用寿命的Cr含量。结果，发现无论含腐蚀环境的类型如何，含铬钢筋所增强的混凝土的使用寿命都随着其含铬量的增加而增加。计算还表明，Cr含量在16％或以上和13％或以上会导致在苛刻和中等氯化物侵蚀区的使用寿命超过100年。在碳化区中，达到100年以上使用寿命的Cr含量经计算为9％或更高。

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