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The corrosion pattern of reinforcement and its influence on serviceability of reinforced concrete members in chloride environment / Ruijin Zhang in Cement and concrete research, Vol. 39 N° 11 (Novembre 2009) 

Public ISBD [article]  in Cement and concrete research > Vol. 39 N° 11 (Novembre 2009) . - pp. 1077–1086 Titre : The corrosion pattern of reinforcement and its influence on serviceability of reinforced concrete members in chloride environment Type de document : texte imprimé Auteurs : Ruijin Zhang, Auteur ; Arnaud Castel, Auteur ; Raoul François, Auteur Année de publication : 2010 Article en page(s) : pp. 1077–1086 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Crack  Detection  ;Corrosion  ;Long-Term  Performance  ;  Bond  Strength  ;  Reinforcement Résumé : This paper deals with two corroded reinforcement concrete beams, which have been stored under sustained load in a chloride environment for 14 and 23 years respectively. The evolution of corrosion pattern of reinforcement and its influence on serviceability are studied. In chloride-induced corrosion process, corrosion cracking affects significantly the corrosion pattern. During the corrosion cracking initiation period, only local pitting corrosion occurs. At early stage of cracking propagation, localized pitting corrosion is still predominant as cracks widths are very small and cracks are not interconnected, but a general corrosion slowly develops as the cracks widen. At late cracking stage, interconnected cracking with wide width develops along large parts of the beam leading to a general corrosion pattern. Macrocells and microcells concepts are used for the interpretation of the results. Mechanical experiments and corrosion simulation tests are performed to clarify the influence of this corrosion pattern evolution on the serviceability of the beams (deflection increase). Experimental results show that, when the corrosion is localized (early cracking stage), the steel–concrete bond loss is the main factor affecting the beams serviceability. The local cross-section loss resulting from pitting attack does not significantly influence the deflection of the beam. When corrosion is generalized (late cracking stage), as the steel–concrete bond is already lost, the generalized steel cross-section reduction becomes the main factor affecting the beams serviceability. But, at this stage, the deflection increase is slower due to the low general corrosion rate. DEWEY : 620.13 ISSN : 0008-8846 En ligne : http://www.sciencedirect.com/science/article/pii/S0008884609001860 [article] The corrosion pattern of reinforcement and its influence on serviceability of reinforced concrete members in chloride environment [texte imprimé] / Ruijin Zhang, Auteur ; Arnaud Castel, Auteur ; Raoul François, Auteur . - 2010 . - pp. 1077–1086. Génie Civil Langues : Anglais (eng) in Cement and concrete research > Vol. 39 N° 11 (Novembre 2009) . - pp. 1077–1086 Mots-clés : Crack  Detection  ;Corrosion  ;Long-Term  Performance  ;  Bond  Strength  ;  Reinforcement Résumé : This paper deals with two corroded reinforcement concrete beams, which have been stored under sustained load in a chloride environment for 14 and 23 years respectively. The evolution of corrosion pattern of reinforcement and its influence on serviceability are studied. In chloride-induced corrosion process, corrosion cracking affects significantly the corrosion pattern. During the corrosion cracking initiation period, only local pitting corrosion occurs. At early stage of cracking propagation, localized pitting corrosion is still predominant as cracks widths are very small and cracks are not interconnected, but a general corrosion slowly develops as the cracks widen. At late cracking stage, interconnected cracking with wide width develops along large parts of the beam leading to a general corrosion pattern. Macrocells and microcells concepts are used for the interpretation of the results. Mechanical experiments and corrosion simulation tests are performed to clarify the influence of this corrosion pattern evolution on the serviceability of the beams (deflection increase). Experimental results show that, when the corrosion is localized (early cracking stage), the steel–concrete bond loss is the main factor affecting the beams serviceability. The local cross-section loss resulting from pitting attack does not significantly influence the deflection of the beam. When corrosion is generalized (late cracking stage), as the steel–concrete bond is already lost, the generalized steel cross-section reduction becomes the main factor affecting the beams serviceability. But, at this stage, the deflection increase is slower due to the low general corrosion rate. DEWEY : 620.13 ISSN : 0008-8846 En ligne : http://www.sciencedirect.com/science/article/pii/S0008884609001860

The corrosion pattern of reinforcement and its influence on serviceability of reinforced concrete members in chloride environment / Ruijin Zhang in Cement and concrete research, Vol. 39 N° 11 (Novembre 2009) 

Public ISBD [article]  in Cement and concrete research > Vol. 39 N° 11 (Novembre 2009) . - pp. 1077–1086 Titre : The corrosion pattern of reinforcement and its influence on serviceability of reinforced concrete members in chloride environment Type de document : texte imprimé Auteurs : Ruijin Zhang, Auteur ; Arnaud Castel, Auteur ; Raoul François, Auteur Année de publication : 2010 Article en page(s) : pp. 1077–1086 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Crack  Detection  ;  Corrosion  ;  Long-Term  Performance  ;  Bond  Strength  ;  Reinforcement Index. décimale : 691 Matériaux de construction. Pièces et parties composantes Résumé : This paper deals with two corroded reinforcement concrete beams, which have been stored under sustained load in a chloride environment for 14 and 23 years respectively. The evolution of corrosion pattern of reinforcement and its influence on serviceability are studied. In chloride-induced corrosion process, corrosion cracking affects significantly the corrosion pattern. During the corrosion cracking initiation period, only local pitting corrosion occurs. At early stage of cracking propagation, localized pitting corrosion is still predominant as cracks widths are very small and cracks are not interconnected, but a general corrosion slowly develops as the cracks widen. At late cracking stage, interconnected cracking with wide width develops along large parts of the beam leading to a general corrosion pattern. Macrocells and microcells concepts are used for the interpretation of the results. Mechanical experiments and corrosion simulation tests are performed to clarify the influence of this corrosion pattern evolution on the serviceability of the beams (deflection increase). Experimental results show that, when the corrosion is localized (early cracking stage), the steel–concrete bond loss is the main factor affecting the beams serviceability. The local cross-section loss resulting from pitting attack does not significantly influence the deflection of the beam. When corrosion is generalized (late cracking stage), as the steel–concrete bond is already lost, the generalized steel cross-section reduction becomes the main factor affecting the beams serviceability. But, at this stage, the deflection increase is slower due to the low general corrosion rate. REFERENCE : 0008-8846 DEWEY : 620.13 En ligne : http://www.sciencedirect.com/science/article/pii/S0008884609001860 [article] The corrosion pattern of reinforcement and its influence on serviceability of reinforced concrete members in chloride environment [texte imprimé] / Ruijin Zhang, Auteur ; Arnaud Castel, Auteur ; Raoul François, Auteur . - 2010 . - pp. 1077–1086. Génie Civil Langues : Anglais (eng) in Cement and concrete research > Vol. 39 N° 11 (Novembre 2009) . - pp. 1077–1086 Mots-clés : Crack  Detection  ;  Corrosion  ;  Long-Term  Performance  ;  Bond  Strength  ;  Reinforcement Index. décimale : 691 Matériaux de construction. Pièces et parties composantes Résumé : This paper deals with two corroded reinforcement concrete beams, which have been stored under sustained load in a chloride environment for 14 and 23 years respectively. The evolution of corrosion pattern of reinforcement and its influence on serviceability are studied. In chloride-induced corrosion process, corrosion cracking affects significantly the corrosion pattern. During the corrosion cracking initiation period, only local pitting corrosion occurs. At early stage of cracking propagation, localized pitting corrosion is still predominant as cracks widths are very small and cracks are not interconnected, but a general corrosion slowly develops as the cracks widen. At late cracking stage, interconnected cracking with wide width develops along large parts of the beam leading to a general corrosion pattern. Macrocells and microcells concepts are used for the interpretation of the results. Mechanical experiments and corrosion simulation tests are performed to clarify the influence of this corrosion pattern evolution on the serviceability of the beams (deflection increase). Experimental results show that, when the corrosion is localized (early cracking stage), the steel–concrete bond loss is the main factor affecting the beams serviceability. The local cross-section loss resulting from pitting attack does not significantly influence the deflection of the beam. When corrosion is generalized (late cracking stage), as the steel–concrete bond is already lost, the generalized steel cross-section reduction becomes the main factor affecting the beams serviceability. But, at this stage, the deflection increase is slower due to the low general corrosion rate. REFERENCE : 0008-8846 DEWEY : 620.13 En ligne : http://www.sciencedirect.com/science/article/pii/S0008884609001860