Characterization of Bond Mechanism between Concrete and Cabon Fiber Reinforced Polymer Grids: Experimental Study

Abstract

Corrosion of steel rebar reduces the lifespans of conventional reinforced concrete structures. In contrast, carbon fiber reinforced polymer (CFRP) materials are preferable due to their noncorroding properties and high strength-to-weight ratio. In the present study, the bonding of CFRP grids to concrete was evaluated for their use in different structural applications, and pull-out tests were conducted on 30 fabricated specimens with different embedded lengths. Results reveal that failure load increases with bond length, although not in a directly proportional manner. Based on empirical data, an equation representing the relationship between the characteristic strength of CFRP grids and their embedded length was formulated. This equation serves as a valuable tool to determine the development length required for CFRP grids in concrete, offering insights into the feasibility of utilizing CFRP grids as reinforcement elements in concrete structures.