1. La Mendola1, G. Campione1, C. Mascari2, G. Zingone1


In the present investigation the bond phenomena between fiber reinforced plastic (FRP), glued with epoxy resin, and calcarenite stone blocks were analyzed. The knowledge of the interfacial behavior between structural members and reinforcing materials is required to estimate the effectiveness of reinforcing techniques, which today are very often utilized. The choice of calcarenite stone is related to the fact that this kind of stone is currently utilized for the construction of masonry structures of historical and monumental interest constituting the monumental heritage. The experimental investigation was planned to study the delamination phenomena of unidirectional FRP materials from masonry structures made of calcarenite ashlars and it aimed in the first phase of the research to obtain the full load-slippage curves and to observe the mode of failure at the interface. Preliminarily, compressive and indirect tensile tests on specimens taken out of the calcarenite ashlars were carried out. Bonding tests were also carried out using an open-loop displacement control testing machine and recording the complete loadslippage curves up to failure. Finally, the maximum load was evaluated analytically and it was correlated to the tensile strength of the calcarenite stone and the main parameters governing the behavior at the interface were identified.

Key words: experimental investigation, calcarenite ashlar, fiber reinforced plastic, delamination, interfacial phenomenon, retrofitting