Study on Durability Degradation of Coated Steel Bar in Magnesium Oxychloride Cement Concrete

doi:10.3969/j.issn.1007-9629.2020.03.012

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	Study on Durability Degradation of Coated Steel Bar in Magnesium Oxychloride Cement Concrete
	Wang, Penghui 1; Qiao, Hongxia 1,2; Feng, Qiong 1; Cao, Hui 1; Wen, Shaoyong 1
刊名	Jianzhu Cailiao Xuebao/Journal of Building Materials
	2020-06-01
卷号	23 期号:3 页码:563-571
关键词	Bars (metal) Cements Chlorine compounds Concretes Durability Least squares approximations Magnesium compounds Maximum likelihood estimation Predictive analytics Scanning electron microscopy Steel corrosion Weibull distribution Corrosion current densities Electrochemical test Least squares methods Magnesium chloride solution Magnesium oxychloride cement Maximum likelihood methods Moment estimation method X ray diffractometers
ISSN号	10079629
DOI	10.3969/j.issn.1007-9629.2020.03.012
英文摘要	The corrosion was accelerated and tested by immersion in magnesium chloride solution, electrochemical test of coated steel bars in magnesium oxychloride cement concrete was carried out, and the characterization of corrosion current density for the corrosion of the coated steel bars was studied. Taking corrosion current density as the degradation index the least squares method, the moment estimation method and the maximum likelihood method were used to estimate the parameters, the corrosion prediction model of the coated steel bar was established based on the Weibull function. And then scanning electron microscopy and X-ray diffractometer were used to conduct microanalysis on the coated steel bar to judge the protective effect of the coating. The results show that the Weibull function can well reflect the degradation process of the coated steel bar, and the least squares method can well describe the durability degradation process of the coated steel bars. The failure time of coated steel bar is about 38000d(104.1 a), the failure time of R(t0.4) is 2960d(8.1a). The coating can protect steel bar in concrete from corrosion. © 2020, Editorial Department of Journal of Building Materials. All right reserved.
语种	中文
出版者	Tongji University
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/115241]
专题	土木工程学院
作者单位	1.Key Laboratory of Disaster Prevention and Mitigation in Civil Engineering of Gansu Province, Lanzhou University of Technology, Lanzhou; 730050, China; 2.Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining; 810083, China
推荐引用方式 GB/T 7714	Wang, Penghui,Qiao, Hongxia,Feng, Qiong,et al. Study on Durability Degradation of Coated Steel Bar in Magnesium Oxychloride Cement Concrete[J]. Jianzhu Cailiao Xuebao/Journal of Building Materials,2020,23(3):563-571.
APA	Wang, Penghui,Qiao, Hongxia,Feng, Qiong,Cao, Hui,&Wen, Shaoyong.(2020).Study on Durability Degradation of Coated Steel Bar in Magnesium Oxychloride Cement Concrete.Jianzhu Cailiao Xuebao/Journal of Building Materials,23(3),563-571.
MLA	Wang, Penghui,et al."Study on Durability Degradation of Coated Steel Bar in Magnesium Oxychloride Cement Concrete".Jianzhu Cailiao Xuebao/Journal of Building Materials 23.3(2020):563-571.