Analysis of Impact Resistance and Durability of Reinforced Concrete Slab Reinforced with Glass Fiber Reinforced Polymer Bars (GFRP)

Glass Fiber Reinforced Polymer (GFRP) bars are a cutting-edge composite material that has garnered substantial interest in the construction sector. In this project, I used glass fiber reinforced polymer bars as an alternative to steel bars. These bars consist of high strength glass fiber encased in a polymer resin, often derived from vinyl ester or polyester. For conventional steel structures, exposure to harsh environment leads to corrosion and ultimately results in loss of serviceability and strength. GFRP demonstrate resistance to chemical degradation and are durable in harsh environments. In this project, the conventional steel reinforcement is replaced with 100% Glass Fiber Reinforced Polymer (GFRP) in one model, and with 50% GFRP in another. A control model with 100% steel reinforcement has also been constructed for comparison. GFRP rebar offer enhanced durability and a higher strength-to-weight ratio, making them a promising alternative. In addition, durability was assessed through water absorption and carbonation tests. The carbonation depth was determined using the phenolphthalein indicator test. The results highlight the potential of GFRP bars as a corrosion-resistant alternative to steel, offering improved long-term durability with comparable structural performance. The mechanical properties like compressive, flexural strengths & impact resistance and durability properties like water absorption & carbonation were studied and compared with conventional concrete. The effects of impact energy, GFRP bar properties, and concrete properties on the RC slab's behavior were also examined.