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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/50455

Title: Electrochemical chloride removal for reinforced concrete with steel rebar cage using auxiliary electrodes
Electrochemical chloride removal for reinforced concrete with steel rebar cage using auxiliary electrodes
Authors: W. Yeih
W. Yeih
J. J. Chang
J. J. Chang
C. C. Chang
C. C. Chang
K. L. Chen
K. L. Chen
M.C. Chi
M.C. Chi
Contributors: 國立臺灣海洋大學:河海工程學系
國立臺灣海洋大學:河海工程學系
Keywords: Electrochemical chloride removal
Electrochemical chloride removal
Steel rebar cage
Steel rebar cage
Auxiliary electrodes
Auxiliary electrodes
Corrosion
Corrosion
Date: 2016-11
2016-11
Issue Date: 2018-10-08T07:22:03Z
Publisher: Cement and Concrete Composites
Cement and Concrete Composites
Abstract: Abstract: In this paper, a new approach of electrochemical chloride removal (ECR) using the auxiliary electrodes was proposed and the performances of this method were investigated by experiments. Two kinds of electrode setups were investigated: the radial type and the layer type. The results showed no matter which setup was used the chloride removal percentage all exceeded 70% after 8-week treatment. The chloride enclosed by the steel rebar cage could be successfully pushed out from concrete using auxiliary electrodes. The half cell potentials of rebars after 8-week treatment were all higher than −270 mV(CSE) and the corrosion rates were lower than 0.05 mpy, it indicated that after ECR treatment the corrosion risk of rebars was low. In addition, after ECR the surface hardness was enhanced via the results of rebound strength test. The pH value of concrete was also enhanced during the ECR process.
Abstract: In this paper, a new approach of electrochemical chloride removal (ECR) using the auxiliary electrodes was proposed and the performances of this method were investigated by experiments. Two kinds of electrode setups were investigated: the radial type and the layer type. The results showed no matter which setup was used the chloride removal percentage all exceeded 70% after 8-week treatment. The chloride enclosed by the steel rebar cage could be successfully pushed out from concrete using auxiliary electrodes. The half cell potentials of rebars after 8-week treatment were all higher than −270 mV(CSE) and the corrosion rates were lower than 0.05 mpy, it indicated that after ECR treatment the corrosion risk of rebars was low. In addition, after ECR the surface hardness was enhanced via the results of rebound strength test. The pH value of concrete was also enhanced during the ECR process.
Relation: 74 pp.136-146
74 pp.136-146
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/50455
Appears in Collections:[河海工程學系] 期刊論文

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