Bond characteristics of sprayed FRP composites bonded to concrete substrate considering various concrete surface conditions

This paper presents the results of pull-off bond tests carried out to investigate the bond characteristics of the sprayed FRP composites bonded to concrete substrate with various surface conditions. It was intended to evaluate the effect of key parameters considering field application conditions on the bond behavior and performance between the sprayed FRP layer and concrete surfaces. Key parameters used in this study consisted of the surface treatment method, saturation condition and the use of the primer coating. The results showed that the key parameters had significant effect on the bond behavior and performance of the sprayed FRP system bonded to concrete substrates being observed.