Environmental influences on linear polarisation corrosion rate measurement in reinforced concrete
Environmental influences on linear polarisation corrosion rate measurement in reinforced concrete
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DOI：
10.1016/s0963-8695(01)00008-1
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发表时间：
2001-09-01
影响因子：
4.2
通讯作者：
Cairns, J
中科院分区：
文献类型：
--
作者：
Millard, SG;Law, D;Cairns, J
线性极化电阻（LPR）方法可用于测量混凝土结构中钢筋的活跃腐蚀速率。然而，单次测量可能对周围环境条件敏感，因此可能不能代表平均年腐蚀率。 LPR 测量可能取决于采样时的温度以及降雨、风或阳光引起的任何润湿/干燥效应。最近的研究在受控实验室环境中检查了一系列遭受氯化物污染或碳化引起的腐蚀的钢筋混凝土样本的行为。频繁进行的 LPR 测量与施加在样品上以促进腐蚀活动的湿/干循环有关。此外，还对暴露在周围天气条件下的现浇钢筋混凝土样本进行了类似的研究。该研究仅部分完成，但中期结果显示了 LPR 测量的可变性以及环境可能对单点测量产生的影响。 (C) 2001 Elsevier Science Ltd. 保留权利。
The Linear polarisation resistance (LPR) method can be used to measure the active rate of corrosion of steel reinforcement in concrete structures. However a single measurement may be sensitive to the ambient environmental conditions and thus may not be representative of the mean annual rate of corrosion. The LPR measurement may be dependent upon the temperature at the time of sampling and on any wetting/drying effects resulting from rainfall and wind or sunshine.Recent studies have examined the behaviour of a series of reinforced concrete specimens subject to chloride contamination or carbonation induced corrosion in a controlled laboratory environment. LPR measurements taken at frequent intervals have been related to a wet/dry cycle imposed upon the specimens to promote corrosion activity. In addition, similar studies have been carried out, of an in situ reinforced concrete specimen exposed to the ambient weather conditions. The study is only partly completed, but interim results show the variability of LPR measurements and the influences the environment may exert on single spot measurements. (C) 2001 Elsevier Science Ltd. Ah rights reserved.