Flexural behavior of ultra-high performance geopolymer RC beams reinforced with GFRP bars

Abstract

Geopolymer concrete (GPC) reinforced with glass fiber reinforced polymer (GFRP) bars can give a good structure system with high durability and strength. So, this research was described the flexural behavior of the geopolymer Ultra-high-performance concrete (UHPC) beams. Also, the impact of UHPC reinforced with glass fiber reinforced polymer (GFRP) bars was studied. For this purpose, (eight) UHP geopolymer RC beams was studied. Four High Strength Concrete (HSC) beams and another four in UHPC were reinforced using GFRP with different ratios. The Results exhibited increasing the first crack load and ultimate load carrying capacity. GPC beams showed a smaller deflection increase at the same ultimate load. GPC beams reinforced with GFRP bars documented a higher crack width compared with control. Using GFRP bars in reinforcement improved the concrete defection, the patterns of cracks, cracks number of and the failure mode. A non-linear analysis using Ansys 2019-R1 was conducted to validate the experimental results for each beam. Results showed well agreement between experimental results and analytical ones.