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Investigation of electrochemical chloride removal from concrete using direct and pulse current
Fang, Yunpeng1,2; Du, Keqin1; Guo, Quanzhong1; Feng, Qiuping1; Li, Dongyun1,2; Wang, Chuan1
Corresponding AuthorDu, Keqin(kqdu@imr.ac.cn) ; Guo, Quanzhong(qzguo@imr.ac.cn)
2021-02-08
Source PublicationCONSTRUCTION AND BUILDING MATERIALS
ISSN0950-0618
Volume270Pages:9
AbstractElectrochemical 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.
KeywordPulse current Electrochemical chloride removal Concrete Potential distribution Current density
DOI10.1016/j.conbuildmat.2020.121434
Indexed BySCI
Language英语
WOS Research AreaConstruction & Building Technology ; Engineering ; Materials Science
WOS SubjectConstruction & Building Technology ; Engineering, Civil ; Materials Science, Multidisciplinary
WOS IDWOS:000608034600057
PublisherELSEVIER SCI LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/159051
Collection中国科学院金属研究所
Corresponding AuthorDu, Keqin; Guo, Quanzhong
Affiliation1.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
Recommended Citation
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.
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