Unidirectional fiber sheet for reinforcing concrete beams and methods of preparing the same

A fiber sheet for reinforcing a body, comprising:

• a fiber layer;
• a multi axial scrim for supporting said fiber layer;
• and
• a release paper partially coated with an adhesive and adhered to said fiber layer and multi axial scrim with the adhesive so that a first area of the fiber layer and multi axial scrim have the adhesive applied thereto and a second area of the fiber layer and multi axial scrim have no adhesive applied thereto, said second area being more permeable to resin than said first area, wherein the adhesive is applied to the fiber layer substantially perpendicular to the filament tows.

A fiber sheet for reinforcing a body, comprising:

• a fiber layer prepared from filament tows and having weight of about 150 to 300 g/m2;
• a multi axial scrim having a net structure for supporting said fiber layer;
• and
• a release paper partially coated with an adhesive and adhered to said fiber layer and multi axial scrim with the adhesive so that a first area of the fiber layer and multi axial scrim have the adhesive applied thereto and a second area of the fiber layer and multi axial scrim have no adhesive applied thereto, said second area being more permeable to resin than said first area, wherein the adhesive is applied to the fiber layer substantially perpendicular to the filament tows.