Concrete reinforcing material and concrete reinforced structure

Abstract

To provide a system for enhancing a bearing force of a concrete skeleton while suppressing increase in at least one of its volume and mass, a concrete reinforced structure is configured to include a skeleton containing concrete having a slit hole linearly formed on a surface layer part of the skeleton; and a concrete reinforcing material having an elongated shape provided to be inserted in the slit hole along a longitudinal direction of the slit hole.

What is claimed is: 
     
         1 . A concrete reinforced structure comprising:
 a skeleton containing concrete, the skeleton having a slit hole linearly formed on a surface layer part of the skeleton, and   a concrete reinforcing material having an elasticity in a longitudinal direction, wherein the concrete reinforcing material is inserted in the slit hole such that the longitudinal direction is aligned with an extending direction of the slit hole.   
     
     
         2 . The concrete reinforced structure according to  claim 1 , wherein the concrete reinforcing material includes a high-elastic-modulus fiber having a tensile elastic modulus of about 353 cN/dtex or more in the longitudinal direction. 
     
     
         3 . The concrete reinforced structure according to  claim 2 , wherein the concrete reinforcing material has a band plate shape and includes a plurality of fiber bundles and wefts for bundling a plurality of the fiber bundles arranged side by side, wherein each of the fiber bundles includes a plurality of the high-elastic-modulus fibers. 
     
     
         4 . The concrete reinforced structure according to  claim 3 , wherein the concrete reinforcing material further comprises a resin impregnated into the fiber bundles. 
     
     
         5 . The concrete reinforced structure according to  claim 3 , wherein the concrete reinforcing material includes a plurality of the fiber bundles connected into a band plate shape, and
 wherein a plurality of the connected fiber bundles are arranged in layers and coupled by a resin.   
     
     
         6 . The concrete reinforced structure according to  claim 1 , wherein the concrete reinforcing material includes a high-elastic-modulus fiber having a tensile elastic modulus of about 353 cN/dtex or more in the longitudinal direction, and a resin impregnated into the high-elastic-modulus fiber, and
 wherein the concrete reinforcing material has a flexibility.   
     
     
         7 . The concrete reinforced structure according to  claim 1 , wherein the concrete reinforcing material is fixed inside the slit hole by an adhesive. 
     
     
         8 . The concrete reinforced structure according to  claim 1 , wherein the slit hole has a depth dimension larger than a width dimension of the slit hole,
 wherein the concrete reinforcing material has a width dimension larger than a thickness dimension of the concrete reinforcing material, and   wherein the concrete reinforcing material is inserted in the slit hole such that a width direction of the concrete reinforcing material is aligned with a depth direction of the slit hole.   
     
     
         9 . The concrete reinforced structure according to  claim 1 , wherein a dimension in a width direction of the slit hole is designed such that facing inner walls of the slit hole are separated from the concrete reinforcing material by a clearance in a range of from about 0.1 mm to about 1 mm. 
     
     
         10 . The concrete reinforced structure according to  claim 1 , wherein the skeleton containing concrete is made of reinforced concrete, and
 wherein the slit hole has a dimension in a depth direction equal to or smaller than a covering depth of the reinforced concrete.   
     
     
         11 . The concrete reinforced structure according to  claim 1 , wherein the slit hole has a dimension in a depth direction equal to or larger than a dimension in a depth direction of the concrete reinforcing material or a dimension in a depth direction of a set of the concrete reinforcing material and a gap filling member arranged if needed, and
 wherein the concrete reinforcing material or the set of the concrete reinforcing material and the gap filling member is provided in the slit hole so as not to protrude from a surface of the skeleton containing concrete.   
     
     
         12 . The concrete reinforced structure according to  claim 1 , wherein the slit hole includes a first slit hole and a second slit hole communicated with the first slit hole,
 wherein the concrete reinforcing material includes a first concrete reinforcing material provided inside the first slit hole and a second concrete reinforcing material provided inside the second slit hole, and   wherein the first concrete reinforcing material and the second concrete reinforcing material are connected at a communicating part of the first slit hole and the second slit hole.   
     
     
         13 . The concrete reinforced structure according to  claim 1 , wherein the slit hole includes a first slit hole and a second slit hole that extend in different directions and communicate with each other,
 wherein the concrete reinforcing material includes a first concrete reinforcing material provided inside the first slit hole, and a second concrete reinforcing material provided inside the second slit hole, and   wherein the first concrete reinforcing material and the second concrete reinforcing material are arranged to cross with each other inside the slit hole.   
     
     
         14 . A concrete reinforcing material for being used in the concrete reinforced structure as recited in  claim 1 ,
 wherein the concrete reinforcing material includes a high-elastic-modulus fiber having a tensile elastic modulus of about 353 cN/dtex or more in the longitudinal direction.   
     
     
         15 . A method for reinforcing a skeleton containing concrete, comprising:
 forming a slit hole linearly on a surface layer part of the skeleton containing concrete, and inserting a concrete reinforcing material having an elongated shape in the slit hole such that a longitudinal direction of the concrete reinforcing material is aligned with a longitudinal direction of the slit hole.