JP4523682B2 - Short fiber reinforced structural member and manufacturing method thereof - Google Patents

Description

[0001]
[Technical field to which the invention belongs]
The present invention relates to a short fiber reinforced structural member such as a short fiber reinforced concrete structural member and a method for manufacturing the same.
[0002]
[Prior art]
Conventionally, short fibers are mixed into reinforced concrete members to prevent cracking due to drying shrinkage of concrete and to prevent wear, etc. There has been nothing intended to be used for a concrete structural member that exhibits a resistance force required for an external force in place of a reinforced concrete structural member that requires a large amount.
[0003]
[Problems to be solved by the invention]
The present invention has been made in view of the above-described prior art, and the object of the present invention is to replace the reinforced concrete structural member that requires rebar work such as complicated rebar processing and bar arrangement, in whole or in part. An object of the present invention is to provide a short fiber reinforced structural member that can be manufactured easily and quickly and that can sufficiently exert resistance to external force, and a method for manufacturing the same.
[0004]
[Means for Solving the Problems]
In order to achieve the above object, the short fiber reinforced structural member of the present invention is a short fiber comprising a molded member in which short fibers are mixed in a plastic molding material and the short fibers are oriented in one direction and / or plane direction. In the reinforcing structural member, the short fiber is any one of carbon fiber, steel fiber, glass fiber, vinylon fiber, and aramid fiber, and the plastic molding material is any one of concrete, mortar, plaster, plastic, and earthenware. It is a rod-like structural member such as a beam or a column, in which a plurality of the molded members are combined .
[0005]
The method for producing a short fiber reinforced structural member of the present invention is a plastic molding of any one of concrete, mortar, plaster, plastic, and earthenware mixed with short fibers of carbon fiber, steel fiber, glass fiber, vinylon fiber, and aramid fiber. Extruding the material and placing it in a mold, orienting the direction of the short fibers in one direction and / or plane direction to form a desired shape, combining a plurality of the rod-like structural members such as beams or columns It is characterized by manufacturing.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 denotes a thin-walled panel in which a large number of short fibers 2 are mixed. By making the wall thickness t of the thin molded panel 1 (in the case of a concrete panel, for example, 10 mm to 60 mm is appropriate) smaller than the length of the short fiber 2, the orientation of the short fiber 2 is changed to the plane of the panel 1 ( It can be oriented in the (two-dimensional) direction. Further, the mixing amount of the short fibers 2 is appropriately set according to the mechanical performance (shear performance, etc.) required for the thin molded panel 1.
[0007]
As a material for the thin-walled molded panel 1, plastic molding materials such as concrete, mortar, gypsum, plastic and earthenware are suitable. Moreover, as a fiber material of the said short fiber 2, carbon fiber, steel fiber, glass fiber, vinylon fiber, an aramid fiber, etc. are used. In the case of carbon fiber, the thin molded panel 1 and a molded member described later can have electromagnetic shielding performance.
[0008]
The thin molded panel 1 in which the short fibers 2 are mixed as described above can be used, for example, a plate-like structural member such as a building slab or a seismic wall, without arranging a bar such as a reinforcing bar at all or in part. Alternatively, it has sufficient tensile strength and shear strength as a rod-like structural member such as a column or beam.
[0009]
FIG. 2A shows an embodiment in which the thin molded panel 1 is supported by a beam 3 and applied to a structural member as a slab 4. The thin molded panel 1 may be a half PC floor material, and (steel) concrete may be placed thereon. In addition, the necessary number of the thin-walled molded panels 1 is overlapped by potato stacking (see FIG. 2 (B)) or misaligned stacking (FIG. 2 (C)) and integrated with each other by grouting or the like to form a full PC floor structure. Also good.
[0010]
FIG. 3 shows an embodiment in which the thin molded panel 1 is installed between columns 5 and applied to a structural member as a wall 6. Also in the present embodiment, the necessary number of sheets are superimposed and used as necessary. In addition to structural members such as seismic walls and outer walls, it can also be used as non-structural members such as secondary walls such as waist walls, hanging walls and sleeve walls, and balcony handrails.
[0011]
FIG. 4 shows an embodiment in which a thin molded member 7 having a U-shaped cross section (groove shape) is applied to a structural member as a beam 8. Also in the present embodiment, similarly to the thin molded panel 1, the thickness dimension t of the thin molded member 7 is made smaller than the length dimension of the short fibers 2 to be mixed, whereby the direction of the short fibers 2 is changed to the thin molded member 7. Can be oriented in the plane (two-dimensional) direction.
[0012]
FIG. 5 shows an embodiment in which another thin molded panel 1 ″ is installed and combined above and below a plurality of thin molded panels 1 ′ aligned in the vertical direction and applied to a structural member as a beam 9. The panels 1 ′ and 1 ″ are integrated by grouting or the like.
[0013]
In FIG. 6A, a thin molded member 10 having an L-shaped cross section is assembled so as to face each other in a square shape, and another thin molded member 10 'having an L-shaped cross section is arranged on the inner side. The Example applied to the structural member as is shown. FIG. 6B shows an embodiment in which a thin molded member 12 having a square cross section is applied to a structural member as a column 13.
[0014]
FIG. 7A shows an embodiment in which a cylindrical thin molded member 14 is applied to a structural member as a column 15. FIG. 7B shows an embodiment in which a cylindrical thin molded member 14 ′ is further arranged on the inner side to form a high-strength column 16. The hollow portions of the pillars 11, 13, 15 and 16 may be filled with a molding material such as concrete. In this case, a reinforcing bar or the like may be arranged in the hollow portion. These cylinders can align the direction of the short fibers in the circumferential direction by a centrifugal molding method.
[0015]
FIG. 8A shows an embodiment of the method for producing a thin molded member of the present invention. By extruding the molding material from the cylindrical nozzle 17, the direction of the mixed short fibers is unidirectional or flat. Can be placed while aligning in the direction. When the diameter of the cylindrical nozzle 17 is smaller than the length of the short fiber, the fibers are aligned in one direction. FIG. 8B shows another embodiment in which the wide nozzle 18 is used, whereby the fibers are aligned in one direction or the plane direction, and each molded member can be manufactured efficiently. FIG. 8C shows a nozzle 19 having a mesh structure for the nozzle opening, and the direction of short fibers can be aligned by the mesh, and the placement efficiency can be further improved.
[0016]
FIG. 9 shows another method of manufacturing a structural member in which alignment plates 21 are arranged in parallel in a wide mold frame 20 and the alignment plates 21 are driven while being gradually pulled out. The outer mold 20 may be a groove-type thin molded member as shown in FIG.
[0017]
【The invention's effect】
1) Reinforcing bars are not required at all or partially in the molded structural member, so complicated rebar construction can be reduced or omitted, and as a result, workability can be improved, construction period can be shortened and cost can be reduced. Reduction can be achieved.
2) Since it is formed with the direction of short fibers such as carbon fibers oriented in one direction or in a plane direction, a rod-like structural member such as a column or a beam or a plate-like structural member such as a floor or a wall is configured with high strength. be able to.
[Brief description of the drawings]
FIG. 1 is a perspective view (A) and a side view (B) of a thin molded panel as an embodiment of a short fiber reinforced structural member of the present invention.
2A is a perspective view of a floor structure using the thin-walled molded panel of FIG. 1, and FIG.
3 is a perspective view of a wall structure by the thin-walled molded panel of FIG. 1. FIG.
FIG. 4 is a perspective view of a beam structure using a thin molded member as another embodiment of the short fiber reinforced structural member of the present invention.
FIG. 5 is a perspective view of a beam structure using a thin molded panel.
FIGS. 6A and 6B are perspective views (A) and (B) of a prismatic structure using a thin molded member.
FIGS. 7A and 7B are perspective views of a cylindrical structure made of a thin molded member.
FIGS. 8A to 8C are explanatory views (A), (B), and (C) showing respective examples of the nozzle for carrying out the manufacturing method of the short fiber reinforced structural member of the present invention.
FIG. 9 is an explanatory view of another embodiment of the method for producing a short fiber reinforced structural member of the present invention.
[Explanation of symbols]
1, 1 ′, 1 ″ thin wall forming panel 2 Short fiber 3 Beam 4 Slab 5 Column 6 Wall 7 Thin wall forming member 8 Beam 9 Beam 10, 10 ′ thin wall forming member 11 Column 12 Thin wall forming member 13 Column 14, 14 ′ Thin wall forming Member 15 Column 16 Column 17 Tubular nozzle 18 Wide nozzle 19 Nozzle 20 Form 21 Orientation plate

Claims (2)

In a short fiber reinforced structure member comprising a molded member in which short fibers are mixed in a plastic molding material and the short fibers are oriented in one direction and / or plane direction, the short fibers are carbon fibers, steel fibers, glass A beam or a column that is any one of fiber, vinylon fiber, and aramid fiber, the plastic molding material is any one of concrete, mortar, plaster, plastic, and earthenware, and a plurality of the molding members are combined. A short fiber reinforced structural member comprising a molded member, which is a rod-shaped structural member such as Extrude any one plastic molding material of concrete, mortar, plaster, plastic, earthenware mixed with carbon fiber, steel fiber, glass fiber, vinylon fiber, short fiber of aramid fiber, and place it in the mold. A short fiber reinforced structural member characterized by producing a rod-like structural member such as a beam or a column by forming a desired shape by orienting the direction of the short fiber in one direction and / or a plane direction, and combining a plurality of pieces. Production method.

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