A proposed empirical corrosion model for reinforced concrete

Concrete bridge structures are affected by corrosion resulting from exposur e to deicing salts. Theoretical models exist which describe the ingress of chlorides and subsequent corrosion. However, the data required by these the oretical models are not routinely available. As part of the new Midlands Li nks risk-based repair strategy, an empirical corrosion model has been devel oped which aims to give accurate predictions of corrosion losses. The model can take account of information relating to the spatial variation of corro sion and can also be used to predict areas of delamination resulting from t he build-up of corrosion products on reinforcing bars. From the Midlands Li nks corrosion model, a more general corrosion model has been proposed for w ider application. This model would provide information on the relative risk from corrosion in a population of concrete structures.