A mathematical model for prediction of time from corrosion initiation to corrosion cracking in RC structures / G. Lin in Materials and corrosion, Vol. 61 N° 11 (Novembre 2010)  

Public ISBD [article]  inMaterials and corrosion > Vol. 61 N° 11 (Novembre 2010) . - pp. 920–928 Titre : A mathematical model for prediction of time from corrosion initiation to corrosion cracking in RC structures Type de document : texte imprimé Auteurs : G. Lin, Auteur ; Y. H. Liu, Auteur ; Z. H. Xiang, Auteur Année de publication : 2011 Article en page(s) : pp. 920–928 Note générale : Génie mécanique Langues : Anglais (eng) Mots-clés : Dynamic corrosion rate model  parametric analysis  reinforcement corrosion  rust expansion  time to cover cracking Résumé : Prediction of time from corrosion initiation to corrosion cracking is a crucial factor in evaluating concrete structures' durability and integrity deteriorated by reinforcement corrosion. This paper presents a mathematical model to predict the time from corrosion initiation to corrosion cracking. A dynamic corrosion rate model based on Bulter–Volmer kinetics and a rust expansion model based on Faraday's law are developed. An analytical model is developed to demonstrate the mechanical consequences of rust buildup around the rebar. The time to corrosion cracking is found to be a function of surrounding concrete material properties, chemical composition of rust, ratio of concrete cover thickness to rebar diameter, and corrosion current density. Comparisons with available experimental results are conducted to show the accuracy and reliability of the present model. Further parametric analysis is carried out to show the influences of various parameters included in the model on the time to corrosion cracking. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905438/abstract [article] A mathematical model for prediction of time from corrosion initiation to corrosion cracking in RC structures [texte imprimé] / G. Lin, Auteur ; Y. H. Liu, Auteur ; Z. H. Xiang, Auteur . - 2011 . - pp. 920–928. Génie mécanique Langues : Anglais (eng) in Materials and corrosion > Vol. 61 N° 11 (Novembre 2010) . - pp. 920–928 Mots-clés : Dynamic corrosion rate model  parametric analysis  reinforcement corrosion  rust expansion  time to cover cracking Résumé : Prediction of time from corrosion initiation to corrosion cracking is a crucial factor in evaluating concrete structures' durability and integrity deteriorated by reinforcement corrosion. This paper presents a mathematical model to predict the time from corrosion initiation to corrosion cracking. A dynamic corrosion rate model based on Bulter–Volmer kinetics and a rust expansion model based on Faraday's law are developed. An analytical model is developed to demonstrate the mechanical consequences of rust buildup around the rebar. The time to corrosion cracking is found to be a function of surrounding concrete material properties, chemical composition of rust, ratio of concrete cover thickness to rebar diameter, and corrosion current density. Comparisons with available experimental results are conducted to show the accuracy and reliability of the present model. Further parametric analysis is carried out to show the influences of various parameters included in the model on the time to corrosion cracking. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905438/abstract

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