PROBLEM TO BE SOLVED: To strongly reinforce an existing concrete by fixing cement mortar composite plates incorporating carbon fiber sheets on a concrete surface at a gap and injecting mortar into the gap. ;SOLUTION: Cement mortar composite plates 1, 1 incorporating carbon fiber sheets 3, 3 are fixed on the surface of a reinforcing concrete structure 10 at a small gap 13, and mortar 14 is injected into the gap 13 to be integrated. In this case, the thickness of the composite plate is set 5-15 mm, and the gap 13 is set preferably 15-20 mm. In addition, the composite plate 1 is preferably fixed by bolts 11 placed at the intervals of 40-90 mm in a concrete structure. Furthermore, the joining part of the adjacent composite plates 1 is covered in the range of 80-120 mm each in the one side of the surface of each composite plate 1 with sheet materials 15, and the outer face thereof is finished by high- early-strength mortar 16. Thereby integration with existing mortar can be secured, and a construction period can be remarkably shortened.;COPYRIGHT: (C)2000,JPO
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