| Abstrakt: |
The increasing demand for jute and carbon fibers in structural works is an area of interest for many researchers to find suitable rebar alternatives. The use of polymer jute is important for solving problems of rust and the effect of alkali and acids solutions and on rebar durability. Natural fibers are cheap and available in large quantities and. They have good tensile strength if they are treated to preserve them from moisture and the impact of the aggressive surrounding conditions. Therefore, this paper focused on studying the mechanical properties of jute fiber rods treated with polymer at heat and low viscosity. Rods of polymer jute fiber were reinforced with 50% carbon fibers and glass fibers. This study aimed to produce cheap bars with the equivalent tensile strength to the conventional rebar. The tensile strength of the Jute/Carbon Fiber-Reinforced Polymer, Jute/Glass Fiber-Reinforced Polymer, and Jute Fiber-Reinforced Polymer were 596,459, and 265 MPa, respectively. The stress-strain curve showed elastic behavior of Jute/Glass Fiber-Reinforced Polymer bars and brittle behavior for Jute/Carbon Fiber-Reinforced Polymer and Jute Fiber-Reinforced Polymer bars, where the failure occurred suddenly at the ultimate stress. Modulus of elasticity of Jute/Carbon Fiber-Reinforced Polymer, Jute/Glass Fiber-Reinforced Polymer bars, and Jute Fiber-Reinforced Polymer bars were 36, 22, and 10 GPa, respectively. The fibers reinforced polymer bars used in this study showed significant bonding with concrete when spreading sand on the surface of the bars. In addition, they showed very high resistance to the moisture and alkaline solutions with PH 12-13 during six months Similarly they showed high resistance to sulfuric acid by 5% and 10% for six months of exposure, Jute/Carbon Fiber-Reinforced and Polymer Jute/Glass Fiber-Reinforced Polymer survived the durability assessment. Therefore, they were a good alternative to the conventional rebar 40-50% reduction in the cost. However, swelling and cracks were observed when submerging Jute Fiber-Reinforced Polymer rods with 10% sulfuric acid after 50 days of immersion. Accordingly, swelling increment and cracks propagation resulted in fibers decomposition after six months. [ABSTRACT FROM AUTHOR] |
