Determination of Chloride Threshold Value in Reinforced Coral Aggregate Concrete

被引：0
|
作者：
Wu Z. [1 ]
Yu H. [1 ]
Ma H. [1 ]
Da B. [2 ]
机构：
[1] Civil Aviation College, Nanjing University of Aeronautics and Astronautics, Nanjing
[2] College of Harbour, Coastal and Offshore Engineering, Hohai University, Nanjing
来源：
Jianzhu Cailiao Xuebao/Journal of Building Materials | 2020年 / 23卷 / 05期
关键词：
Chloride threshold value(CTV); Coral aggregate concrete(CAC); Linear polarization; Steel corrosion; Two-dimensional chloride diffusion model;
D O I：
10.3969/j.issn.1007-9629.2020.05.012
中图分类号：
学科分类号：
摘要：
Corrosion rate of steel embedded in coral aggregate concrete(CAC) exposed in simulated seawater for 270days and its surface free chloride(Csf) values were determined by linear polarization resistance(LPR) method and two-dimensional chloride diffusion model. The chloride threshold value(CTV) of different types of steels in CAC was determined by the relationship between the Csf and its corrosion rate. The results indicate that the corrosion rate of steel in CAC gradually decreases with the increase of cover thickness and the anti-corrosion performances of them is ranked as follows: 2205duplex stainless steel(2205S)>316L stainless steel(316L)>organic coated steel(OCS)>ordinary steel(OS). And the CTV values of them in CAC are determined as follows: Less than 0.210%(OCS), 0.330%0.410%(316L) and more than 0.463%(2205S). © 2020, Editorial Department of Journal of Building Materials. All right reserved.
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页码：1078 / 1085and1092
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