Probabilistic evaluation of initiation time of chloride-induced corrosion
Probabilistic evaluation of initiation time of chloride-induced corrosion
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DOI：
10.1016/j.ress.2006.12.010
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发表时间：
2008-03
期刊：
影响因子：
--
通讯作者：
D. Val;P. Trapper
中科院分区：
文献类型：
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作者：
D. Val;P. Trapper
本文提出了一个氯离子侵入混凝土的模型。该模型考虑了控制氯离子进入的两种机制-扩散和对流。使用一维（1-D）制定的模型，氯离子结合和环境湿度对氯离子进入混凝土的影响进行了研究。根据调查结果，选择了概率分析参数。概率评估的时间腐蚀开始，然后进行了钢筋混凝土（RC）墙（1-D的问题）和RC柱（2-D的问题）在海洋环境中。分析结果表明，在相同保护层厚度的情况下，钢筋混凝土柱角部钢筋锈蚀的概率远高于钢筋混凝土墙中部钢筋锈蚀的概率。结果表明，正确预测钢筋混凝土柱和梁等元件的腐蚀开始的2-D建模的重要性。
The paper presents a model for chloride ingress into concrete. The model accounts for two mechanisms which control the chloride ingress—diffusion and convection. Using one-dimensional (1-D) formulation of the model, the influence of chloride binding and ambient humidity on chloride ingress into concrete has been investigated. Based on results of this investigation parameters for probabilistic analysis have been selected. Probabilistic evaluation of the time to corrosion initiation has then been carried out for a reinforced concrete (RC) wall (1-D problem) and a RC column (2-D problem) in a marine environment. Results of the analysis show that for the same thickness of the concrete cover the probability of corrosion initiation in the corner reinforcing bars of the RC column is much higher than in reinforcing bars in the middle part of the RC wall. The results demonstrate the importance of 2-D modelling for correct prediction of corrosion initiation in such RC elements as columns and beams.