CONICET | Buscador de Institutos y Recursos Humanos

Different types of surface treatment were applied to the smooth rods in order to enhance the bond with concrete. Firstly, the rods were machined using a lathe and a grinding stone to create lugs with different configurations. Secondly, the rods were coated with sand fixed with a thin layer of epoxy resin. The experimental results indicate that the bond strength is highest when the failure mode is a combination of two mechanisms: shearing off of the concrete lugs and that of the FRP lugs. With regard to the variation of lug width, the friction and interlock forces have a greater influence on bond strength. With respect to the height of the lug, the strength increases compared with the results obtained without sand. However the internal diameter doesn´t affect bond strength.