Investigation of electrochemical chloride removal from concrete using direct and pulse current

doi:10.1016/j.conbuildmat.2020.121434

IMR OpenIR

	Investigation of electrochemical chloride removal from concrete using direct and pulse current
	Fang, Yunpeng 1,2; Du, Keqin 1; Guo, Quanzhong 1; Feng, Qiuping 1; Li, Dongyun 1,2; Wang, Chuan 1
通讯作者	Du, Keqin(kqdu@imr.ac.cn) ; Guo, Quanzhong(qzguo@imr.ac.cn)
	2021-02-08
发表期刊	CONSTRUCTION AND BUILDING MATERIALS
ISSN	0950-0618
卷号	270 页码:9
摘要	Electrochemical chloride removal (ECR) technique as an effective repair method has been applied to chloride-attacked concrete structures. This research studies the influence of different external electrical fields on the ECR treatment for reinforced concrete. Two types of electrical fields including direct and pulse current with average current densities of 2, 3 and 4 A/m(2) were investigated. The chloride ion content of concrete before and after ECR treatment was determined. The results show that no matter what current density was used for concrete repair, the effect of pulse current on the desalination of concrete was better than direct current. Also, increasing the current density can also promote the concrete chloride removal efficiency. When applying a current density of 4 A/m(2) to the steel rebars for 28 days, the remained chloride concentration of the concrete after ECR treatment was obviously lower than that of using 2 and 3 A/m(2). In addition, the half-cell potential method was used to evaluate the rebar potential distribution. It was found that the pulse current can make the cathode reinforcement arranged in parallel in the concrete have a more uniform potential distribution, which indicates that the applied electrical current is easier to uniformly pass through the whole concrete structures. (C) 2020 Published by Elsevier Ltd.
关键词	Pulse current Electrochemical chloride removal Concrete Potential distribution Current density
DOI	10.1016/j.conbuildmat.2020.121434
收录类别	SCI
语种	英语
WOS研究方向	Construction & Building Technology ; Engineering ; Materials Science
WOS类目	Construction & Building Technology ; Engineering, Civil ; Materials Science, Multidisciplinary
WOS记录号	WOS:000608034600057
出版者	ELSEVIER SCI LTD
引用统计	被引频次：11[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/159051
专题	中国科学院金属研究所
通讯作者	Du, Keqin; Guo, Quanzhong
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Coll Mat Sci & Engn, Hefei 230026, Peoples R China
推荐引用方式 GB/T 7714	Fang, Yunpeng,Du, Keqin,Guo, Quanzhong,et al. Investigation of electrochemical chloride removal from concrete using direct and pulse current[J]. CONSTRUCTION AND BUILDING MATERIALS,2021,270:9.
APA	Fang, Yunpeng,Du, Keqin,Guo, Quanzhong,Feng, Qiuping,Li, Dongyun,&Wang, Chuan.(2021).Investigation of electrochemical chloride removal from concrete using direct and pulse current.CONSTRUCTION AND BUILDING MATERIALS,270,9.
MLA	Fang, Yunpeng,et al."Investigation of electrochemical chloride removal from concrete using direct and pulse current".CONSTRUCTION AND BUILDING MATERIALS 270(2021):9.