Mobility of Chloride in Concrete Subjected to Electrochemical Treatment
- Title
- Mobility of Chloride in Concrete Subjected to Electrochemical Treatment
- Author
- 조원정
- Keywords
- chloride; corrosion; electrochemical treatment; steel
- Issue Date
- 2021-03
- Publisher
- AMER CONCRETE INST
- Citation
- ACI MATERIALS JOURNAL, v. 118, NO 2, Page. 1-10
- Abstract
- In this study, chloride mobility after electrochemical treatment
in concrete was evaluated. Once a concrete specimen containing
three steel reinforcing bars was exposed to 4M NaCl for 365 days,
electrochemical chloride extraction was applied to the reinforcing
bars for 8 weeks at 750 mA/m2
(0.484 mA/in.2
) direct current. To
evaluate chloride mobility, chloride concentration at all depths
was measured for total, free, and bound ones by chloride profiling.
Simultaneously, the corrosion rate and potential were measured
during the treatment. The removal efficiency for total chloride was
significant, ranging from 26.2 to 70.2% compared to the untreated
specimen. Free chlorides were mostly removed from the concrete
body except for the nearer surface, and bound chloride concentration was surprisingly reduced to 0.67 to 0.74%, irrespective of the
depth. Moreover, the corrosion rate and potential indicated that
the risk of corrosion was mitigated. A visual examination for steel
reinforcing bars confirmed that rust was dramatically reduced after
the treatment.
- URI
- https://www.proquest.com/docview/2509038091/fulltextPDF/A01F71E93C2247B9PQ/1?accountid=11283https://repository.hanyang.ac.kr/handle/20.500.11754/171790
- ISSN
- 0889325X; 1944737X
- DOI
- 10.14359/51730416
- Appears in Collections:
- RESEARCH INSTITUTE[E](부설연구소) > RESEARCH INSTITUTE OF ENGINEERING & TECHNOLOGY(공학기술연구소) > Articles
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