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The relationship between chloride migration rate for concrete and electrical current in steady state using the accelerated chloride migration test

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Abstract

In this study the electrochemical technique is applied to accelerate chloride ion migration in concrete to determine the chloride ions in anode cell. This paper presents a new method for determining the chloride migration rate in concrete from steady state migration test by measuring the electrical current. The plain ordinary Portland cement concrete and concrete containing different type of mineral admixtures (fly ash and slag) with w/b ratios of 0.35, 0.45, 0.55, and 0.65 were used.For a given charge passed in steady state, the current corresponding to the given charge passed was correlated with the chloride migration rate. The results for all mixtures show that the chloride migration rate and the current corresponding to a given charge passed in steady state is linearly correlated.

Résumé

Dans cette étude, la technique électrochimique est appliquée pour accélérer la migration des ions de chlorure dans ciment pour déterminer les ions chlorure dans les cellules anode. Cet article présente une nouvelle méthode pour déterminer le taux de migration de chlorure dans le ciment à partir d'essais en régime permanent en mesurant le courant électrique. Du ciment simple et ordinaire de Portland et du ciment contenant différents types de mélanges minéraux (cendres volantes et scories) avec des rapports eau/liant de 0,35, 0,45, 0,55 et 0,65 ont été utilisés. Pour une charge donnée passée en régime permanent, le courant correspondant à la charge passée est corrélé avec le taux de migration de chlorure. Les résultats pour les différents mélanges montrent tous que cette corrélation est linéaire.

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Authors and Affiliations

  1. Institute of Materials Engineering, National Taiwan Ocean University, Taiwan, R.O.C.

    C. C. Yang

  2. Department of Building Engineering and Architecture, China Institute of Technology, Taiwan, R.O.C.

    S. W. Cho

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  1. C. C. Yang
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  2. S. W. Cho
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Yang, C.C., Cho, S.W. The relationship between chloride migration rate for concrete and electrical current in steady state using the accelerated chloride migration test. Mat. Struct. 37, 456–463 (2004). https://doi.org/10.1007/BF02481582

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  • DOI: https://doi.org/10.1007/BF02481582

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