Materiales de Construcción, Vol 56, No 284 (2006)

Electrochemical extraction of chlorides from reinforced concrete: variables affecting treatment efficiency

M. J. Sánchez
Dpt. Enginyeria de la Construcció, Obres Públiques i Infrastructura Urbana, Universitat d’Alacant, Alicante, Spain

P. Garcés
Dpt. Enginyeria de la Construcció, Obres Públiques i Infrastructura Urbana, Universitat d’Alacant, Alicante, Spain

M. A. Climent
Dpt. Enginyeria de la Construcció, Obres Públiques i Infrastructura Urbana, Universitat d’Alacant, Alicante, Spain


This paper reports the results of applying electrochemical chloride extraction (ECE) to a series of chloride-contaminated concrete specimens. Experimental conditions were varied to study the efficiency of this technique under different circumstances. The survey covered the possible relationship between efficiency and the location of the sampling point, current density, type of concrete and treatment intermittence. Experiments were also conducted with different reinforcement configurations used in standard structural members such as columns and beams to ascertain the impact of rebar geometry.


electrochemical extraction of chlorides; chlorides; concrete; corrosion; efficiency

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(1) Lankard, D. R.; Slater, J. E.; Hedden, W. A. y Niesz, D. E.: “Neutralisation of chloride in concrete”, Report Nº FHWA-RD-76-60 (1975), pp. 1-143.

(2) Slater, J. E.; Lankard, D. R. y Moreland, P. J.: “Electrochemical removal of chlorides from concrete bridge deck”, Materials Performance (Nov), 21-26 (1976), Houston, US.

(3) Morrison, G. L.; Virmani, Y. P.; Stratton, F. W. y Gilliland, W.L.: “Chloride removal and monomer impregnation of bridge deck concrete by electro-osmosis”, Report Nº FHWA-KS-RD-74-1 (1976), pp. 1-41.

(4) Andrade, C.; Castellote, M. y Alonso, C.: “An overview of electrochemical realkalisation and chloride extraction”, en Ho, D. W. S.; Godson, I. y Collins, F. (eds.): Proceedings of 2nd Int. RILEM/CSIRO/ACRA Conference on Rehabilitation of Structures, Melbourne, Australia (1998), pp. 1-12.

(5) Climent, M. A.; Sánchez de Rojas, M. J.; Vera, G. de y Garcés, P.: “Effect of type of anodic arrangements on efficiency of electrochemical chloride removal from concrete”, ACI Materials Journal, 103 (2006), pp. 243-250.

(6) Cobo, A.: Comprobación de la eficacia de la realcalinización y de la extracción electroquímica de cloruros como métodos de rehabilitación de las estructuras corroídas de hormigón armado. Tesis Doctoral. Escuela Técnica Superior de Ing. de Caminos C. y P- Madrid (2001).

(7) Garcés, P.; Sánchez de Rojas, M. J. y Climent, M. A.: “Effect of the reinforcement bar arrangement on the efficiency of electrochemical chloride removal technique applied to reinforced concrete structures”, Corrosion Science, 48 (2006), pp. 531-545. doi:10.1016/j.corsci.2005.02.010

(8) Climent, M. A.; Viqueira, E.; Vera, G. de y López-Atalaya, M. M.: “Analysis of acid-soluble chloride in cement, mortar and concrete by potentiometric titration without filtration steps”, Cement and Concrete Research, 29 (1999), pp. 893-898. doi:10.1016/S0008-8846(99)00063-0

(9) Wang, Y.; Li, L. Y. y Page, C. L.: “Two-dimensional model of electrochemical chloride removal from concrete”. Computational Materials Science, 20 (2001), pp. 196-212. doi:10.1016/S0927-0256(00)00177-4

(10) Hope, B. B.; Ihekwaba, N. M. y Hansson, C. M.: “Influence of multiple rebar mats on electrochemical removal of chloride from concrete”, Materials Science Forum, vols. 192-194 (1995), pp. 883-890.

(11) Tritthart, J.: “Changes in the composition of pore solution and solids during electrochemical chloride removal in contaminated concrete”, Advances in Concrete Technology. Second CANMET/ACI International Symposium. Las Vegas, Nevada, USA, 1995.

Copyright (c) 2006 Consejo Superior de Investigaciones Científicas (CSIC)

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