Strengthening flexural reinforced concrete beams using natural fiber reinforced polymer composite laminates

Fiber obtained naturally which is bio-degradable and extracted from plant species. Hibiscus Vitifolius Stalk Fiber (HVSF) when used in concrete increases the ductility for both new and old structures under specific treatment to avoid degradable. The application of fiber in the concrete structure is increased due to behavioural property of high tensile, high straining, high modulus, thermal resistance, low density, impact load resistance, non-toxic and good resistance to chemical attack. The flexural behaviour of the concrete is investigated and evaluated the optimum thickness of fiber in the soffit of the beam by eliminating delamination. The effectiveness of optimum thickness of fiber improved the ultimate load, ultimate deflection and improved in crack resistance.