| 摘要 |
PROBLEM TO BE SOLVED: To provide a unidirectionally reinforced fiber sheet for reinforcing/ repairing a concrete structure, which is light in weight, excellent in drap ability, free from intrusion of air between a skeleton and the sheet per se, and excellent in resin impregnability. SOLUTION: The unidirectionally reinforced fiber sheet is formed of reinforced fiber bundles which are orientated in one direction and spread like a sheet, and braided fabric and/or nonwoven fabric containing at least one or more thermoplastic resins, which is arranged at least on one surface of the bundles. The bundles and the braided fabric and/or nonwoven fabric are combined in one body by thermal welding. The air permeability of the sheet is set to 2 to 50 ml/(cm2.sec), and the tensile strength in a sheet transverse direction is set to 1 to 50 kg/5 cm width. The unidirectionally reinforced fiber sheet has suitable air permeability, and therefore air having intruded when mounted in the concrete structure is easily released, and therefore it is excellent in adhesiveness. Further, the sheet is suitably reinforced in the transverse direction, and therefore it is resistant to creasing after impregnation of the resin, and also excellent in resin impregnating ability.
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