Seidel, Gonda, Lavorgna & Monaco, PC
Reinforcing fiber sheet and concrete structure using same
 The present invention has an object to provide a reinforcing fiber sheet which permits sufficient reinforcement of a concrete structure with a smaller number of layers than in the conventional cases, without causing fracture of the sheet within a range of yielding of reinforcing bars. The reinforcing fiber sheet 1 of the invention comprises high-elasticity and high-elongation carbon fibers 4 having a modulus of elasticity of at least 35 ton/mm.sup.2 and a fracture elongation of at least 0.9%, arranged in an amount of at least 250 g/m.sup.2 in one direction through an adhesive layer 3 on a substrate sheet 2. The object of the invention can be achieved by providing the carbon fibers 4 of the reinforcing fiber sheet 1 with the above-mentioned properties. 
Tonen Corporation
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Makoto
Saito