Research developments on bond between corroded steel and concrete (Key-note lecture)

Corrosion of steel in concrete has the most detrimental effect on reinforced concrete structures. Among the other effects, corrosion deteriorates the interface between steel and concrete. Bond between steel and concrete is at the base of all the resisting structural mechanisms in reinforced concrete structures and therefore its modification is fundamental in case of anchorages and laps of reinforcing bars on existing structures. Despite the considerable number of research papers, some critical aspects should be taken into account when considering experimental test on bond in presence of corrosion. An overview of the latest experimental activities is presented, and some research challenges related to the reliability of test conditions and the significance of the obtained data are discussed.