Enhanced electro-chemical corrosion model for reinforced concrete under severe coupled action of chloride and temperature
Enhanced electro-chemical corrosion model for reinforced concrete under severe coupled action of chloride and temperature
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DOI：
10.1016/j.conbuildmat.2010.09.014
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发表时间：
2011-03-01
影响因子：
7.4
通讯作者：
Ishida, Tetsuya
中科院分区：
文献类型：
--
作者：
Hussain, Raja Rizwan;Ishida, Tetsuya
钢筋混凝土结构和建筑材料的过早劣化已成为全世界关注的主要问题。钢筋混凝土建筑物暴露于侵蚀性环境，如严重的氯化物侵蚀加上高温，会加速钢筋材料的腐蚀。氯化物和温度对腐蚀的影响是一种电化学热力学现象，受多个参数的影响，其中一些参数在过去的研究工作中被忽视，并有争议的讨论。因此，本文的目的是，通过结合现实的电化学热力学模型和环境控制的实验室实验，建模和验证钢筋的腐蚀电位和腐蚀速率的混凝土建筑物的整个生命周期。本研究提出了一种简化的半经验腐蚀材料建模方法，该方法遵守基本的腐蚀科学定律，并通过涉及广泛的氯化物和温度变化的实验进行了验证。材料建模任务已经进行了使用混凝土结构耐久性模型'DuCOM'由我们的研究小组作为一个计算平台，在其上的耦合温度-氯离子引起的钢筋混凝土建筑物的整个生命周期的腐蚀检查在空间和时间域。(C)2010爱思唯尔有限公司保留所有权利。
The premature deterioration of reinforced concrete construction and building materials has become a major concern throughout the world. Reinforced concrete buildings exposed to aggressive environments such as severe chloride attack coupled with high temperature suffer from accelerated corrosion of reinforcement material. The effect of chloride and temperature on corrosion is an electro-chemical thermodynamic phenomenon influenced by several parameters and some of them have been overlooked in the past research works and are controversially discussed. The purpose of this paper is therefore; to model and verify the corrosion potential and corrosion rate of reinforcement throughout the life of concrete buildings by incorporating realistic electro-chemical thermodynamic models and environment controlled laboratory experimentation. This research presents a simplified semi-empirical corrosion material modeling approach which obeys the basic corrosion science laws and is also verified by experimentation involving a wide range of chloride and temperature variations. The material modeling task has been conducted by the use of concrete construction durability model 'DuCOM' developed by our research group as a computational platform on which the coupled temperature-chloride induced corrosion throughout the life of reinforced concrete buildings is examined in both space and time domains. (C) 2010 Elsevier Ltd. All rights reserved.