Abstract:
The purposes of this study are to study behaviors of concrete confined by Fiber Reinforced Plastic (FRP) composite, to apply experimental data for repairing and retrofiting of the damaged concrete by FRP, and to suggest an appropriate and cost-effective use of FRP composite. The experiments were designed to measure the compressive forces and vertical displacements of tested specimens. The specimens were concrete cylinders with dimensions of 100 mm. in diameter and 200 mm. in height. the specimens also are with and without steel reinforcement. The damages were introduced to the specimens by using an electrolysis process. The damage levels were determined from the period of the electrolysis process and the remaining weight of steel in the specimens. Then the damaged specimens were re[aired by using a fiber reinforced paper to warp with various numbers of layers. The compressive loads of repaired specimens were compared to the undamaged specimens. The results showed that the behavior of repaired specimens is acceptable. The compressive loads can be significantly increased by wrapping of FRP composite to the surfaces of specimens. The increase of compressive loads depends on the number layers of FRP used for erapping the specimens. The numbers of FRP layers used for repairing the specimens are determined from damage levels of the specimens. FRP composite is also applicable for both concrete cylinders with and without steel reinforcement.