Exploring the Performance of FRP Bars in Concrete Made with Recycled-Coarse Aggregate

This research project was carried out to conduct an experimental analysis about the FRP bars’adhesion strength in recycled-coarse aggregate concrete when compared to conventional-aggregate concrete, with the objective of improving result interpretation. The ongoing study aims to explore the bonding properties of different FRP bars (such as glass, carbon, and basalt) in recycledaggregate concrete through the utilization of the bond test. A total of forty-seven samples were underwent conventional bond testing. The research focused on key variables affecting FRP bars/concrete bond, which encompassed concrete strengths (30, 45, and 60 MPa), bar diameters (8, 10, and 12 mm), and bar bond lengths (5, 10, and 15d, d represents the bar diameter). The study analyzed the impact of these variables on the enhancement of bond strength. Outcomes indicated that the peak bond stress and bond stress-slip patterns for FRP bars in recycled-aggregate concrete displayed similarities to those observed in standard concrete. Additionally, the research highlighted the feasibility of BFRP bars as a suitable substitute for GFRP bars in FRP-reinforced concrete structures. The findings suggested that preventing FRP debonding failures is achievable through the provision of adequate bar length and high concrete strength.