Abstract
Ultimate failure of concrete members retrofitted by surface overlaying with polymer cement mortar may accompany sheer peeling at the bond interface under combinations of structural systems and loading conditions. By this research, the bond behavior was solved experimentally and was grasped. Experimental method was that shearing bond stress was applied to the bonding interface of the specimens retrofitted by surface overlaying method with polymer cement mortar. The stress transfer mechanism of this method was understood from strain distribution of reinforcing bar and mortar. It was shown that the peeling failure energy of retrofitted part of this method can be calculated using bond stress and displacement of bond interface.
