JPH06280347A - Concrete reinforcing member - Google Patents

Abstract

PURPOSE:To facilitate processing by forming an energization hardening rope which is formed up with a bundle of carbon fibers impregnated with thermal hardening resin, into a net shape, energizing and hardening the aforesaid rope, and transforming the material of the rope into carbon fiber reinforced plastics. CONSTITUTION:An energization hardening rope 1 which is formed with a bundle of carbon fibers impregnated with thermal hardening resin, is transformed into a net shaped body 2, and the net shaped body 2 is wound around fours support bars 3. The energization hardening rope 1 is energized by an energizing means 4 so as to be heated up, and the rope 1 is hardened so as to allow the material of the rope to be transformed into carbon fiber reinforced plastics, and concrete is then placed therein. This constitution thereby enables a net shaped or a cubic reinforcing concrete member to be obtained while bending works are made easy.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reticulated concrete reinforcing material made of carbon fiber reinforced plastic.

[0002]

2. Description of the Related Art As a conventional net-like or three-dimensional concrete reinforcing material, an iron net is mainly used, and a part of a three-dimensional woven fiber-reinforced plastic is used.

In the case of an iron net, if the concrete member has a large cross section, not only the bending process becomes difficult, but also it takes a lot of time to carry it to the site. In the case of a three-dimensional woven fiber-reinforced plastic, its processing is impossible and its use is limited. Further, when the concrete member has a large cross section, there are restrictions in transportation.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a net-like or three-dimensional concrete reinforcing material which can be easily bent and has no restrictions in transportation.

[0005]

According to the present invention, a net-like body made of a current-curing rope in which a carbon fiber bundle is impregnated with a thermosetting resin is used as a raw material, and the net-like body has a predetermined shape. It is a concrete reinforcing material made of carbon fiber reinforced plastic in which an electric current is passed through the rope to cure the current-curing rope.

In the present invention, first, it is necessary to net the net-like body from the electrically curable rope in which the carbon fiber bundle is impregnated with the thermosetting resin, and this work is performed in the factory. Woven and knotted nets are made by a net making machine. A woven net is preferable because it is preferable that the vertical rope and the horizontal rope of the mesh body are orthogonal to each other, but on the other hand, if the rope has many knots, the adhesive force between the concrete and the reinforcing material becomes large, and therefore, the knot in that aspect. A net is preferable, and both have advantages and disadvantages. Of course, the net may be made by a net making machine other than this. When the net-making by the net-making machine is insufficient, the net-making may be done manually. The size of the mesh is appropriately determined depending on the type and size of the concrete member in which the reinforcing material is used. Further, it is preferable that the size of the mesh varies depending on the location rather than being uniform over the entire mesh. This is because, for example, when this mesh is bent and used as a reinforcing member for a beam member in the form of a quadrangular prism, the horizontal rope becomes the axial line and the vertical rope becomes the stirrup line. However, it is possible to perform efficient reinforcement by changing the number of the upper and lower streaks and changing the number of the stirrup stirs at the end and the center.

The reticulate body manufactured as described above is transported (folded in the case of a large flat area) or to a processing site adjacent to the site for electric current curing.

[0008] In the field or the like, the reticulated body is energized in the state of being flat or bent to have a predetermined three-dimensional shape. Due to the heat generated in the rope due to this energization, the rope itself is hardened and the net-like body is hardened while maintaining its shape. The hardened mesh body is placed at a predetermined place, and concrete is poured therein.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view showing a manufacturing process of the present invention. (A) is a net-making process, (b) is a carrying process, and (c) is a curing process.

(A) is a net-making step in which the electro-curable rope 1 is arranged as a warp, and the electro-curable rope 1 is driven as a weft to weave the net-like body 2. When the produced net-like body 2 has a large plane area, it is folded as shown in (b) and is transported to the site or a processing site adjacent to the site for electric current curing. As shown in (c), the mesh body 2 is wound around four support rods 3 to form a quadrangular prism shape, which is energized by the energizing device 4 and hardened to be a beam member reinforcing material. Although a single energizing device 4 is shown in (c), a plurality of energizing devices 4 may be provided depending on the structure and size of the mesh body 2.
Is sometimes used. Further, if the support bar 3 is provided in the concrete form, the labor of moving the hardened reinforcing material can be saved. 2A and 2B show an example of the structure of a mesh-like body of a reinforcing member for a beam member. FIG. 2A is a plan view and FIG. 2B is a perspective view in a state of being bent into a quadrangular prism. As shown in (a), the warp 6 has a dense design at both ends and a coarse design at the center, and the weft has a dense design at the weft 5 part and a coarse design on both sides and a slightly dense design at the weft 7 part. . When folded into a quadrangular prism, the weft yarns 7 are overlapped. The weft 5 corresponds to the lower end bar, the weft 7 corresponds to the upper end bar, and the warp 6 corresponds to the stirrup bar.

[0012]

EFFECTS OF THE INVENTION It is possible to obtain a net-like or three-dimensional concrete reinforcing material which is easy to bend and has no restrictions on transportation.

[Brief description of drawings]

FIG. 1 is a perspective view showing a manufacturing process of the present invention, (a)
Is a net making process, (b) is a carrying process, and (c) is a curing process.

FIG. 2 is a diagram showing the structure of a mesh of reinforcing members for beam members,
(A) is a plan view and (b) is a perspective view in the state of being bent into a quadrangular prism.

[Explanation of symbols]

1 ・ ・ Electrically curable rope, 2 ・ ・ Reticulate body, 3 ・ ・ Support rod, 4 ・ ・ Electrical device, 5 ・ ・ Lower end bar weft, 6 ・ ・ Warp, 7 ・ ・ Upper bar weft

Claims (1)

[Claims] 1. An electro-curable rope in which electricity is applied to an electro-curable rope in a state where a net-like body made of a net-shaped electro-curable rope in which a carbon fiber bundle is impregnated with a thermosetting resin is used as a raw material, has a predetermined shape. Reinforced concrete made of hardened carbon fiber reinforced plastic