ABSTRACT
ABSTRACT: In this paper, a Near Surface Mounted (NSM) strengthening technique that increases the resistance of concrete structures is proposed. The bond between the NSM rods and concrete is the key component of the NSM strengthening technique. In this technique, there are two bond interfaces: one between the reinforcement composite rod and the filling material; the other between the filling material and concrete. These two interfaces must be investigated to enable the technique to efficiently perform. The aim of our experimental evaluation was to investigate the effects of filling material properties depending on the temperature variation (−15 °C∼55 °C) and number of temperature cycles (0, 3, 100) for Carbon Fiber Reinforced Polymer (CFRP) rods used in the NSM technique. A total of 27 cubic specimens were fabricated, and pullout tests were conducted. The results are presented in terms of failure load, average bond stress, strains in CFRP bar, and mode of failure.
