Flat strip lamella for reinforcing building components and method for placing a flat strip lamella on a component

Abstract

Flat strip lamella ( 10 ) for reinforcing load-bearing or load transferring building components e.g. concrete, wood, steel, natural stone or masonry. The flat strip lamella ( 10 ) has a composite structure consisting of a plurality of parallel aligned, bendable or flexible carrying fibers ( 26 ) and a binding matrix ( 28 ) joining the carrying fibers to each other and making them shear resistant. The lamella can be attached facewise to the surface of the building component to be reinforced, using adhesive ( 16 ). In order to be able to bend the flat strip lamella over corner edges of a building component, the binding matrix ( 28 ) consists of a thermoplastic synthetic material.

1 . Flat strip lamella for reinforcing load-bearing or load-transmitting building components ( 12 ), preferably comprised of concrete, which comprises a composite structure of a plurality of parallel-aligned bendable or flexible reinforcing fibers ( 26 ) and a binder matrix ( 28 ) which joins the reinforcing fibers in a shear-resistant manner, and which can be attached facewise to the outer surface of the reinforcing construction component ( 12 ) by means of an adhesive ( 16 ), characterized therein, that the binding matrix ( 28 ) consists of a thermoplastic resin.  
     
     
         2 . Flat strip lamella according to  claim 1 , characterized therein, that the glass transition point of the thermoplastic resin is at least 100° C. and the melting point is at least 160° C.  
     
     
         3 . Flat strip lamella according to  claim 1  or  2 , characterized therein, that the thermoplastic resin is selected from the group consisting of polyolefins, vinylpolymers, polyamide, polyester, polyacetale, polycarbonate, polyurethane and ionomers.  
     
     
         4 . Flat strip lamella according to one of claims  1  through  3 , characterized therein, that the reinforcing fibers are or include carbon fibers.  
     
     
         5 . Flat strip lamella according to one of claims  1  through  4 , characterized therein, that the carrying fibers are or include aramid fibers, glass fibers or polypropylene fibers.  
     
     
         6 . Method for attachment of a premanufactured longitudinally extending flat strip lamella according to one of claims  1  through  5  to a construction component ( 12 ) over at least one corner edge ( 24 ), characterized therein, that the flat strip lamella is heated in the intermediate area ( 30 ) to be applied over the corner ( 24 ) of the construction component to a temperature above the glass transition point of the thermoplastic binder, that it is bent in the heated condition at an angle corresponding to that of the corner or edge angle of the construction component, and that before or after cooling it is adhered to the construction component over the construction edge by means of a adhesive layer ( 16 ).  
     
     
         7 . Method for attachment of a premanufactured flat strip lamella according to one of claims  1  through  5  to a construction component surface, characterized therein, that the flat strip lamella ( 10 ) with each free end in a heated condition is drawn or bent upon a respective tensioning element, and is arrested thereto, and that the tensioning elements ( 38 ) are tensioned against each other and the flat strip lamella ( 10 ) is adhered to the construction component surface in this pretensioned condition.  
     
     
         8 . Method for attachment of a flat strip lamella according to one of claims  1  through  5  to a construction component with the aid of an adhesive, characterized therein, that a wave or zigzag shape is pressed in into the free ends ( 34 ) of the flat strip lamella ( 10 ) under the application of pressure and heat, and while inserting the lamella ends ( 34 ) into a construction component recess the wave or zigzag areas are filled with adhesive under production of a form fitting connection.  
     
     
         9 . Method for attachment of a flat strip lamella according to one of claims  1  through  5  to an construction component with the aid of an adhesive, characterized therein, that the flat strip lamella is heated to a temperature above the glass transition pint of the binder is wound in a spiral manner about a column-shaped construction component and in this wound state is cooled to room temperature with simultaneous hardening of the adhesive.  
     
     
         10 . Method according to one of claims  6  through  9 , characterized therein, that the reinforcing fibers ( 26 ) are at least partially exposed by removal of binder ( 28 ) from the surface of the side which is to be connected with the construction component.