Influence of Fiber Surface Treatment on the Flexural Behavior of Frp Strengthened Mortar

There is a growing need for the rehabilitation, repair, and upgrading of concrete structures such as bridges and buildings. The repair or rehabilitation of reinforced concrete structures often offers a lower cost alternative to rebuilding, and it is traditionally achieved by bonding steel plates to the tensile face of a reinforced concrete member. The shear strength can be enhanced with plates bonded to the structure sides in the shear spans. In recent years fiber reinforced polymer (FRP) sheets have shown great promise as an alternative in repair or rehabilitation of existing reinforced concrete structures. In comparison with steel plates, FRP sheets offer high tensile strength, low weight, good resistance to corrosion, high fatigue strength, high durability, high damping, and ease of installation, among others. Common reinforcement in FRP sheets includes carbon fibers (CFRP), glass fibers (GFRP), and aramid fibers (AFRP). Strengthening concrete structures by externally bonding FRP reinforcement sheets provides a speedy, economic, effective and simple technique in practice.