In reinforced concrete structures, the bond between concrete and reinforcement can be deteriorated by corrosion of the reinforcing steel. Corrosion of the steel bars leads to a volume increase, causing splitting stress in the concrete. For the study of the influence of different factors on bond behavior, pullout test is a simple while effective method. In this study, tests have been carried out to evaluate the effects of corrosion on bond and bond-slip behavior, for a series of different corrosion levels. The reinforcing steel bars in the specimens, both with and without stirrups, were corroded to different designed corrosion levels before being tested in an MTS testing machine on which loads and slips were recorded by a computer. The tests were designed to provide data required for evaluation of bond properties including ultimate bond strength and free-end slip for various corrosion levels under pullout loads. The degradation in bond strength was studied and some conclusions reached based on the test results.
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