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Numerical study of the linear polarisation resistance technique applied to reinforced concrete for corrosion assessment / A. Clément in European journal of environmental and civil engineering, Vol. 16 N° 3-4 (Mars/Avril 2012) 

Public ISBD [article]  in European journal of environmental and civil engineering > Vol. 16 N° 3-4 (Mars/Avril 2012) . - pp. 491-504 Titre : Numerical study of the linear polarisation resistance technique applied to reinforced concrete for corrosion assessment Type de document : texte imprimé Auteurs : A. Clément, Auteur ; S. Laurens, Auteur ; G. Arliguie, Auteur Année de publication : 2012 Article en page(s) : pp. 491-504 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Corrosion  Steel  reinforced  concrete  Linear  polarisation  resistance  On-site  measurement  Numerical  simulation Résumé : The linear polarisation resistance (LPR) technique is increasingly being implemented to assess the corrosion rate of steel reinforcements in concrete. However, a lack of reliability is often observed experimentally. In order to improve the physical comprehension of the LPR technique, FEM simulations were performed. Several measurement devices using annular and rectangular probe geometries were simulated and the numerical experimentation allowed the relevance of RILEM recommendations for on-site measurements to be tested. It was shown that the LPR measurement using annular counter-electrodes with confining devices was a real three-dimensional physical problem and the non-uniform distribution of the polarising current on the steel surface is actually a major source of error since it is not taken into account by the usual protocols. Moreover, it was found that some complexity was induced by the use of guard-rings. DEWEY : 624 ISSN : 1964-8189 En ligne : http://www.tandfonline.com/doi/abs/10.1080/19648189.2012.668012 [article] Numerical study of the linear polarisation resistance technique applied to reinforced concrete for corrosion assessment [texte imprimé] / A. Clément, Auteur ; S. Laurens, Auteur ; G. Arliguie, Auteur . - 2012 . - pp. 491-504. Génie Civil Langues : Anglais (eng) in European journal of environmental and civil engineering > Vol. 16 N° 3-4 (Mars/Avril 2012) . - pp. 491-504 Mots-clés : Corrosion  Steel  reinforced  concrete  Linear  polarisation  resistance  On-site  measurement  Numerical  simulation Résumé : The linear polarisation resistance (LPR) technique is increasingly being implemented to assess the corrosion rate of steel reinforcements in concrete. However, a lack of reliability is often observed experimentally. In order to improve the physical comprehension of the LPR technique, FEM simulations were performed. Several measurement devices using annular and rectangular probe geometries were simulated and the numerical experimentation allowed the relevance of RILEM recommendations for on-site measurements to be tested. It was shown that the LPR measurement using annular counter-electrodes with confining devices was a real three-dimensional physical problem and the non-uniform distribution of the polarising current on the steel surface is actually a major source of error since it is not taken into account by the usual protocols. Moreover, it was found that some complexity was induced by the use of guard-rings. DEWEY : 624 ISSN : 1964-8189 En ligne : http://www.tandfonline.com/doi/abs/10.1080/19648189.2012.668012