Structural Behavior of Circular Geopolymer Concrete Filled Fiber Reinforced Polymer (FRP) Tube Columns Internally Reinforced with FRP Bars under Different Loading Conditions

Sustainable development is a global goal to address the climate change due to increased greenhouse emissions. The construction industry is the largest industry in the world and cement is the most widely used material. Cement industry is a major contributor in carbon dioxide (CO2) emissions. In recent years, geopolymer concrete (GPC) has emerged as a sustainable alternative to ordinary Portland cement concrete (OPC). The GPC not only eliminates the use of cement, but also utilizes the industrial waste materials like fly ash (FA) and ground granulated blast furnace slag (GGBFS). Steel reinforced concrete (RC) structures are commonly used in the construction industry. Steel reinforcement is prone to corrosion, which leads to the loss of strength, serviceability and durability of RC structures. This results in huge repair and maintenance costs. To overcome the corrosion susceptibility of the steel, fiber reinforced polymer (FRP) was developed. The FRP is a non-corrosive, light-weight and durable material. In addition, the FRP possesses high tensile strength and electromagnetic resistance as compared to steel.