Numerical simulation and experiment on the coupled effects of macro-cell corrosion and multi-ion equilibrium with pseudo structural concrete
Numerical simulation and experiment on the coupled effects of macro-cell corrosion and multi-ion equilibrium with pseudo structural concrete
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DOI：
10.1016/j.cemconcomp.2021.104181
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发表时间：
2021-10
影响因子：
10.5
通讯作者：
Zhao Wang;K. Maekawa;Hiroki Takeda;F. Gong
中科院分区：
文献类型：
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作者：
Zhao Wang;K. Maekawa;Hiroki Takeda;F. Gong
结构混凝土中钢筋的腐蚀是一个严重的劣化问题。腐蚀可归因于与电场和化学物质密切相关的电化学反应。通常，根据阳极和阴极极化是否发生在同一位置，将腐蚀分为两种类型，包括微电池和宏电池腐蚀。将电解质中的电场与多离子动力学相结合，提出了结构混凝土宏电池腐蚀的数值计算方法。采用空间平均模拟方法，允许分析域为结构构件、结构甚至结构群，而不是具体的混凝土-钢筋界面。并以拟混凝土材料进行了试验验证，验证了数值模拟的可靠性，得到了满意的相关性。
Corrosion of reinforcing bars in structural concrete is a critical deterioration issue. Corrosion could attribute to the electro-chemical reactions which are closely related to the electrical field and chemical substances. Generally, two types of corrosion are classified including the micro-cell and macro-cell corrosion depending on whether the anodic and cathodic polarization take place at the same location or not. This paper presented a numerical evaluation of macro-cell corrosion of structural concrete with integrating the electrical field and multi-ion kinetics in electrolyte. Space-averaged simulation method was adopted which allowed the analytical domain to be structural members, structures or even structure clusters instead of specific concrete-reinforcement interface. Experimental validation was also conducted with pseudo concrete materials to verify the reliability of numerical simulation where satisfied correlation was found.