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Modelling of interaction between corrosion-induced concrete cover crack and steel corrosion rate
Chloride-induced corrosion of steel reinforcement in concrete may cause severe damage to RC structures. This paper examines the interaction between corrosion-induced cover crack growth and corrosion propagation. The coupled micro- and macro-cell corrosion process involved in a typical chloride-induced corrosion is numerically simulated. Both oxygen concentration and electrical potential distribution within concrete cover are considered in the electrochemical analysis. A uniform thick-walled cylinder model is formulated to simulate the cover surface crack width evolution. Oxygen is a crucial factor influencing corrosion rate under cracked concrete cover. Results show that macrocell corrosion rate may not change so much while microcell corrosion rate increases a lot as oxygen permeability increases with corrosion-induced cover crack. Corrosion-induced longitudinal crack accelerates subsequent deterioration process.
Modelling of interaction between corrosion-induced concrete cover crack and steel corrosion rate
Chloride-induced corrosion of steel reinforcement in concrete may cause severe damage to RC structures. This paper examines the interaction between corrosion-induced cover crack growth and corrosion propagation. The coupled micro- and macro-cell corrosion process involved in a typical chloride-induced corrosion is numerically simulated. Both oxygen concentration and electrical potential distribution within concrete cover are considered in the electrochemical analysis. A uniform thick-walled cylinder model is formulated to simulate the cover surface crack width evolution. Oxygen is a crucial factor influencing corrosion rate under cracked concrete cover. Results show that macrocell corrosion rate may not change so much while microcell corrosion rate increases a lot as oxygen permeability increases with corrosion-induced cover crack. Corrosion-induced longitudinal crack accelerates subsequent deterioration process.
Modelling of interaction between corrosion-induced concrete cover crack and steel corrosion rate
Modellierung der Wechselwirkung zwischen dem korrosionsbedingten Riss der Betondeckung und der Korrosionsgeschwindigkeit von Stahl
Cao, Chong (author) / Cheung, Moe M.S. (author) / Chan, Ben Y.B. (author)
Corrosion Science ; 69 ; 97-109
2013
13 Seiten, 16 Bilder, 2 Tabellen, 51 Quellen
Article (Journal)
English
Betonstahl , Rissausbildung , Lochfraßkorrosion , Korrosionsgeschwindigkeit , Korrosionselement , elektrochemische Korrosion , Sauerstoffgehalt , Potenzialverteilung , Korrosionspotenzial , Korrosionsstrom , numerische Modellierung , Makrozelle , Korrosionsmechanismus , elektrochemische Reaktion , Polarisationskurve , Korrosionsprodukt , lineare Regression
Modelling of interaction between corrosion-induced concrete cover crack and steel corrosion rate
| British Library Online Contents | 2013
| British Library Online Contents | 2017