ABSTRACT
The technique of bonding steel plates using epoxy adhesiws is recognized as an effective and convenient method for repair and rehabilitation of existing reinforced concrete structures. However the problems associated with the steel corrosion, handling due to excessive size and weight, undesirable formation of welds, partial composite action with the surface concrete, and de-bonding lead to the need for alternative materials, and further research in this field. The high strength to weight ratio, resistance to electro-chemical corrosion, larger creep strain, good fatigue strength, potential for decreased installation costs and repairs due to lower weight in comparison with steel, and non-magnetic and non-metallic properties of carbon fiber reinforced polymer (CFRP) composites offer a viable alternative to bonding of steel plates. The emergence of high strength epoxies has also enhanced the feasibility of using CFRP sheets and fabric for repair and rehabilitation. The flexural capacity of both prestressed and nonstressed members may be increased through the external bonding of CFRP sheets and fabric. The shear strength of concrete beams can be improved wrapping thin CFRP fabric in different configurations in conjunction with resins. Any CFRP system considered should have sufficient test data demonstrating the adequate performance of the entire system in similar applications including its method of installation.
