On-site measurements of corrosion rate of reinforcements
On-site measurements of corrosion rate of reinforcements
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DOI：
10.1016/s0950-0618(00)00063-5
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发表时间：
2001-03-01
影响因子：
7.4
通讯作者：
Alonso, C
中科院分区：
文献类型：
--
作者：
Andrade, C;Alonso, C
随着遭受腐蚀的建筑物数量的不断增加，对其结构安全性的研究显得尤为重要。在对实际损伤程度进行量化并预测其演变的基础上对剩余承载力进行评估，需要对钢筋锈蚀速率进行测量。电位和电阻率绘图是最常见的技术，尽管它们仅仅是定性的。腐蚀速率本身的测量现在是可行的。然而，该技术尚未得到广泛应用。本文给出了正确测量腐蚀速率的简要依据。最准确的方法是基于电流的调制限制，这使我们能够限制电流极化的钢区域。该方法基于极化电阻的测定。在本文的第二部分，由于天气变化的测量腐蚀电流的可变性进行了评论，潮湿的时间，以及影响混凝土的水分含量的气候参数的值，给出了为了获得的腐蚀电流的代表性值被实施到结构计算。最后，本文简要介绍了这一实施。(C)2001爱思唯尔科技有限公司版权所有。
The increasing number of structures suffering corrosion makes the study of their structural safety of importance. The assessment of the residual load-bearing capacity based on the quantification of the actual degree of damage and the prediction of its evolution needs measurement of the steel corrosion rate. Electrical potential and resistivity mapping are the most commonly known techniques, although they are merely qualitative. The measurement of the corrosion rate itself is now feasible. However, the technique is still not extensively used. In this paper, a brief basis of the correct measurement of the corrosion rate is given. The most accurate method is based on the modulated confinement of the current which enables us to limit the steel area polarized by the current. The method is based on the determination of the polarization resistance. In the second part of the paper, the variability of the measured corrosion current due to weather variations is commented on, and values of the time of wetness, as well as of the climatic parameters which influence the moisture content of the concrete, are given in order to obtain the representative value of the corrosion current to be implemented into the structural calculations. The paper ends with a brief description of this implementation. (C) 2001 Elsevier Science Ltd. All rights reserved.