JPH1086277A - Method for laminating sheet material and laminate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate working in a short period of time, improve reproducibility and increase bonding strength by laminating a metallic sheet so as to be opposed to a sheet material, upon laminating the sheet material, the metallic sheet and a fibrous sheet. SOLUTION: The sheet materials 1a, 1b of rolled steel material for general construction are arrayed with the distance of 2mm and metallic sheets 2a, 2b are bonded to the upper and lower surfaces of the sheet materials through adhesive agent. Subsequently, carbon fibrous sheets 3a, 3b are bonded to the upper and lower surfaces of the metallic sheets through adhesive agent to produce a laminate, whose connecting parts are reinforced. In another way, the carbon fibrous sheet 3a is bonded to the surface of the metallic sheet 1a through adhesive agent to produce a laminate and the carbon fibrous sheet 3b is bonded to the surface of the metallic sheet 2b through adhesive agent to produce a laminate. Subsequently, two sheets of laminate are bonded to the upper and lower surfaces of the sheet materials 1a, 1b, arrayed with the distance of 2mm, for example. In this case, the metallic sheets 2a, 2b are bonded so as to be opposed to the sheet materials 1a, 1b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of laminating structural materials such as steel plates, stainless steel plates, fiber reinforced concrete, and fiber reinforced plastics, and more particularly to a laminated material used for construction members.

[0002]

2. Description of the Related Art Conventionally, structural plate materials such as steel plates, stainless steel plates, fiber reinforced concrete plates, and fiber reinforced plastic plates, particularly steel plates, have been used as construction members for building structures, civil engineering structures, and the like. However, when a defective portion occurs due to cracking, chipping, corrosion or the like in these plate materials used as construction members, it is necessary to repair the defective portion. Also, joining the end portions between a plurality of plate materials, bending one plate material into a cylindrical shape or a prismatic shape,
When joining opposing ends, it was necessary to reinforce the joint so as to increase the joint strength at the joint. As a method of repairing and reinforcing a plate material used for a construction member as described above, for example, when the plate material is a steel plate, a method of welding and joining the steel plate to a defective portion or a joint portion is generally performed.

[0003]

However, in a construction site where reinforcement and repair are performed, conditions such as temperature and humidity are not always sufficient, unlike in a factory where the facility environment is complete.
Under such a severe environment, there is a problem that it is difficult to perform a welding method requiring advanced technology. Therefore, it has been required to easily perform reproducible reinforcement and repair in a short time. The present invention has been made in view of the above circumstances, and provides a method of laminating plate materials and a laminate that can be easily constructed in a short time and have high reproducibility and bonding strength. The present inventor proposes a laminating method of laminating a metal plate, which is a highly ductile material, and a fiber sheet, which is a highly rigid material, on a plate material in which repair of a defective portion or reinforcement of a joint portion is required. Surprisingly, the inventors have found that an extremely robust laminated body can be easily obtained by laminating them, and have completed the present invention.

[0004]

That is, the present invention provides a plate material,
A method for laminating a plate material, comprising laminating a metal plate and a fiber sheet, wherein the metal plate is laminated so as to face the plate material. The method for laminating plate materials is characterized in that a laminate composed of a metal plate and a fiber sheet is laminated between adjacent plate materials. Furthermore, a laminate obtained by laminating by the lamination method, wherein the plate member is used for a construction member, and the construction member is used for a concrete structure. It is.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, a metal plate and a fiber sheet are laminated on a plate material as a base material, and the plate material is laminated. The material of the plate is not particularly limited, but is preferably a robust material from the viewpoint of providing a strongly reinforced laminate. To that end, steel plates commonly used as construction members,
Stainless steel plates, fiber reinforced concrete plates and fiber reinforced plastic plates are preferred. Among these, a steel plate and a stainless steel plate are preferable, and a steel material is more preferable in terms of formability, cost, and ease of bending the plate material.

[0006] The metal material of the metal plate to be laminated on the plate material is not particularly limited as long as it is a high ductility material having a larger elongation at break than the fiber sheet used in the present invention. , Zinc steel sheets, copper, copper alloys, and non-ferrous materials such as aluminum and aluminum alloys, and these are arbitrarily used according to the purpose.

The fibrous material of the fibrous sheet laminated on the plate material is not particularly limited as long as it is a high rigid material having a higher tensile modulus than the metal plate used in the present invention. For example, aramid fiber, polyolefin fiber, acrylic Fibers, vinylon fibers, glass fibers, carbon fibers and the like can be mentioned, and these can be used arbitrarily according to the purpose. Among them, carbon fibers having high rigidity are preferable from the viewpoint of exhibiting a robust reinforcing effect. The carbon fiber is produced by baking each organic fiber such as cellulose, polyacrylonitrile, lignin, and pitch. However, polyacrylonitrile-based or pitch-based carbon fiber is preferable from the viewpoint of easy availability.

In the present invention, when a metal plate and a fiber sheet are laminated on a plate material, the plate material and the metal sheet, the metal plate and the fiber sheet,
It is necessary to bond a metal plate to a metal plate and a fiber sheet to a fiber sheet. When these are bonded, it is preferable to use an adhesive. The adhesive used here is not particularly limited, and includes acrylic, epoxy, urethane, and silicone adhesives. In particular, the adhesive is used under low-temperature conditions below freezing, and the surface or rustproofed when wet due to rainfall or water leakage. When bonding lipophilic surfaces such as oil or machine oil, it can be easily installed in a short time, and the reproducibility and bonding strength are large.
Acrylic adhesives are preferred.

The acrylic adhesive of the present invention refers to an adhesive which cures an acrylic monomer or a mixture thereof with a polymerization initiator. The acrylic monomer means (meth) acrylic acid or (meth) acrylate. Use (meta)
The type of the acrylate is not particularly limited, and examples thereof include methyl (meth) acrylate, ethyl (meth) acrylate, butyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, 2-hydroxyethyl (meth) acrylate, Monofunctional (meth) acrylates such as hydroxypropyl (meth) acrylate, polyethylene glycol (meth) acrylate, polypropylene glycol (meth) acrylate and dimethylaminoethyl (meth) acrylate, and polyethylene glycol di (meth) acrylate; Examples include polyfunctional (meth) acrylates such as 4-butanediol (meth) acrylate, epoxy (meth) acrylate, and trimethylolpropanetritrimethylolpropanetri (meth) acrylate. That. These may be used alone or in combination of two or more.

The acrylic adhesive of the present invention may be cured by a thermal polymerization reaction. However, when the acrylic adhesive is cured at a construction site, a heat source necessary for generating the thermal polymerization reaction is constantly secured. And managing the heat source can be difficult. Therefore, it is preferable to use the polymerization initiator and the decomposition accelerator in combination to cure the acrylic adhesive at room temperature.

As the polymerization initiator of the present invention, it is preferable to use an organic peroxide or an azo compound as a radical polymerization initiator. There is no particular limitation on the organic peroxide, for example,
Organic peroxides such as methyl ketone peroxide and benzoyl peroxide; and inorganic peroxides such as potassium persulfate and ammonium persulfate. Examples of the azo compound include azobisisobutyronitrile and the like. The decomposition accelerator refers to a compound that accelerates the decomposition of the polymerization initiator. Examples thereof include thiourea derivatives such as diethylthiourea, amines such as N, N-diethyl-p-toluidine, cobalt naphthenate and cobalt octylate. And organic metal chelate compounds such as copper acetylacetonate.

The acrylic adhesive of the present invention may use a monomer other than the acrylic monomer in combination. Other monomers are not particularly limited, for example, monofunctional monomers such as styrene, acrylonitrile, vinyl acetate and acrylamide, and polyfunctional monomers such as divinylbenzene, triallyl cyanurate and triallyl isocyanurate. Body. These may be used alone or in combination of two or more.

Further, a rubber component may be used in the acrylic adhesive of the present invention in order to increase the bonding strength. The rubber component is not particularly limited. For example, polybutadiene rubber, polyisopre rubber, polybutene rubber, SBR rubber,
Examples include NBR rubber, chloroprene rubber, ERR rubber, acrylic rubber, silicone rubber, EVA rubber, polyurethane rubber, and the like. These may be used alone or in combination of two or more. Further, a graft copolymer such as MBS resin may be used to adjust the solubility of the rubber component in the acrylic adhesive.

The acrylic adhesive of the present invention is divided into two liquids, that is, a mixture of an acrylic monomer containing a polymerization initiator and a mixture of an acrylic monomer containing a decomposition accelerator. It is preferable to use a two-pack type acrylic adhesive that mixes and cures the liquid, because the work is easy. Above all, the effect of the portion of the concrete structure, the metal plate and the carbon fiber sheet adhered to the air from the adherend is favorable.
A generation of acrylic adhesives is preferred.

In the present invention, when a metal plate as a highly ductile material and a fiber sheet as a highly rigid material are laminated on a defective portion or a joint portion of a plate material requiring reinforcement, the metal plate always faces the plate material. It is necessary to laminate so that The laminate of the plate members reinforced in this way has a very large reinforcing effect.
Although the reason for this is not clear, it is considered that the stress applied to the plate material is relaxed by the metal plate and transmitted to the fiber sheet.

The embodiment of the laminating method for repairing and reinforcing a defective portion or a joint portion of the plate material is not particularly limited as long as the metal plate is laminated so as to face the plate material. No. (1) A lamination method comprising laminating a metal plate on a plate material, and then laminating a fiber sheet on the metal plate. (2) A laminating method, which comprises laminating a metal plate on a fiber sheet in advance to form a laminate, and laminating a plate material on the metal plate of the laminate. Among these, the laminating method (1) is preferable because the laminating method can be performed at the construction site, and the laminating method (2) can be preliminarily prepared at a factory.

Incidentally, one or more metal plates and fiber sheets may be laminated. When a plurality of sheets are stacked, the sheets may be stacked one by one at a construction site, or a plurality of sheets may be stacked in advance at a factory. When laminating a metal plate and a fiber sheet, they are laminated using an adhesive. Further, a metal plate or a fiber sheet may be further laminated on the carbon fiber sheet of the laminate. The lamination method of the present invention may be applied to one side or both sides of a plate.

As another embodiment of the present invention, a case where ends of plate members are joined to each other, or a single plate material is bent into a cylindrical or prismatic shape, and opposite ends are joined to each other. In addition, it is necessary to increase the joint strength of the joint. For this purpose, it is preferable to laminate the metal plate and the fiber sheet across the end portions of the adjacent plate members. Further, as another embodiment of the present invention, when repairing a defective portion such as a crack, a missing portion, or a corrosion of a plate material, it is preferable to laminate the sheet material so as to cover the missing portion.

The tensile elongation at break of the metal sheet of the present invention is preferably 5% or more, more preferably 10% or more, from the viewpoint of high ductility.
If it is less than 5%, the reinforcing effect may be insufficient. The tensile modulus of the fiber sheet of the present invention is 10 ⁵ k in terms of high rigidity.
gf / cm ² or more is preferable, and 10 ⁶ kgf / cm ² or more is more preferable. If it is less than 10 ⁵ kgf / cm ² , the reinforcing effect may be insufficient.

The thickness of the plate, metal plate and fiber sheet of the present invention is not particularly limited. According to the lamination method of the present invention, a laminate of a high-strength plate material can be easily obtained in a short time with high reproducibility.
It is preferably used as a construction member composed of a structure such as a stone, bituminous material, a metal material, a synthetic resin material, and concrete. Particularly, a concrete structure such as a railroad or road pier, a pillar, a beam, and a wall of a building. It is more preferable to cover the periphery of the concrete structure with a plate material and to join the plate materials to each other for the seismic reinforcement.

[0021]

The present invention will be described below with reference to the following embodiments. Unless otherwise stated, the following plate materials, metal plates, carbon fiber sheets, and adhesives used in Examples 1 and 2 and Comparative Example 1 were used.

Plate material (base material) Material: Rolled steel material for general structure (JIS G 3101 (1
987) SS400) Shape: length 15.0cm x width 2.5cm x thickness 0.3c
m strip shape Tensile breaking strength: 4300 kgf / cm ² (The test piece is JI
No. 5 test piece of SZ 2201 (1980) was used, and the test method was 6.5 of JIS Z 2241 (1980).
(Tested in accordance with "tensile strength") Elongation at break: 40% (the test piece was JIS Z 2201 (1
980) using the No. 5 test piece and the test method was JIS Z
(Tested in accordance with 6.7 “Elongation at break” of 2241 (1980))

Metal plate Material: Cold rolled steel plate (JIS G 3141 (198
7) SPCC steel plate) Shape: length 20.0 cm x width 2.5 cm x thickness 0.03
cm strip shape Tensile breaking strength: 3000 kgf / cm ² (same as the test method) Breaking elongation: 70% (same as the test method)

Carbon fiber sheet Material: polyacrylonitrile, fiber weight 300 g / c
m ² shape: Three strip-shaped pieces of 10.0 × 2.5 × 0.0165 cm laminated with the following adhesive. Tensile breaking strength: 30000 kgf / cm ² Tensile elastic modulus: 3.80 × 106 kgf / cm ² Elongation at break: 1% However, each physical property is based on I of JIS K 7073 (1988).
The test was performed using a V-shaped test piece. The tensile strength at break refers to the tensile strength according to the JIS standard).

Adhesives Main components: 55% by weight of methyl methacrylate, 35% by weight of 2-hydroxyethyl methacrylate and MBS resin 1
A two-component second-generation acrylic adhesive in which a 0% by weight mixture is divided into two liquids, a liquid A and a liquid B, and cumene hydroperoxide is added to the liquid A and cobalt naphthenate is added to the liquid B.

The joining strength was measured by conducting a tensile test for tensile strength at break, tensile modulus of elasticity and elongation at break per unit width under the following test conditions using a tensile tester. Tensile speed: 1 mm / min Measurement temperature: 23 ° C

(Example 1) As a plate material, rolled steel plates 1a and 1b for general structure are arranged at an interval of 2 mm as shown in FIG. 1, and metal plates 2a and 2b are arranged on upper and lower surfaces of these plates.
Were adhered with an adhesive. Next, carbon fibers 3a and 3b were adhered to the upper and lower surfaces of the metal plate with an adhesive to form a laminate having a reinforced joint. When a tensile test was performed on this laminate, a tensile breaking strength per unit width was 13%.
The breaking elongation was 58 kgf / cm and the elongation at break was 15%. There was no apparent change in the joined portion, and the base material portion was broken. At this time, the tensile strength at break per unit width of the plate material is 1
The value exceeded 290 kgf / cm.

(Example 2) A carbon fiber sheet 3a is adhered to the surface of a metal plate 2a with an adhesive to form a laminate.
Similarly, a laminate was prepared by laminating 2b and 3b. Next, as shown in FIG. 1, two laminates were respectively bonded to the upper and lower surfaces of the plate members 1a and 1b arranged at an interval of 2 mm with an adhesive. At this time, the metal plates 2a, 2b and the plate materials 1a, 1b
And were adhered so as to face each other. When a tensile test was performed on this laminate, the tensile strength at break per unit width was 1362.
kgf / cm, elongation at break was 18%, there was no apparent change in the joined portion, and the base material portion was broken.

(Comparative Example 1) Instead of the metal plates 2a and 2b, metal plates 4a and 4b made of a 20.0 x 2.5 x 0.3 cm strip-shaped general structural rolled steel material SS400 were used.
Moreover, it carried out similarly to Example 1 except having produced the laminated body as shown in FIG. 2 without using a carbon fiber sheet. When a tensile test was performed on this laminate, the tensile strength at break per unit width was 1108 kgf / cm, and the elongation at break was 7%.
The adhesive layer was broken and the bond was released.

(Embodiment of Seismic Reinforcement) FIGS. 3 and 4 show an embodiment in which the laminated body of the present invention is applied to seismic reinforcement of a column. In FIG. 3, a U-shaped steel plate 5 is used as a plate material, and a backing plate 6 is bonded to the back surface of one end of the steel plate 5 with an acrylic adhesive. The backing plate 6 has the effect of increasing resistance to deformation between the plate members. The material of the backing plate 6 is not particularly limited, such as a metal material and a fiber sheet. The reinforced concrete pillars 7
As shown in FIG. 4, two U-shaped steel plates 5a and 5b to which a and 6b are bonded are covered. The ends of the steel plates 5a and 5b are joined to the plates 6a and 6b across the steel plates 5a and 5b by the adhesive plates 6a and 6b and the acrylic adhesive applied to the ends of the steel plates 5a and 5b. . Steel plates 5a, 5b
The metal plates 2c, 2d and three carbon fiber sheets 3c, 3d are laminated on the surface side of the joined portion by bonding with an acrylic adhesive as shown in FIG. Mortar 8 may be injected into the gap between the reinforced concrete column 7 and the steel plates 5a and 5b to integrate the steel plate and the column to form a more reinforced concrete structure. A resin composition such as an adhesive or a filler may be injected instead of the mortar.

(Embodiment of Repairing Corroded Part) FIG. 5 shows an embodiment in which a corroded portion of a plate is repaired by the laminating method of the present invention. On the surface of the plate material 1e having a corroded portion, a metal plate 2e and a three-layer carbon fiber sheet 3e are adhered and laminated with an acrylic adhesive so as to cover the corroded portion 9 as shown in FIG. .

[0032]

The laminating method of the present invention is a laminating method that is easily and easily reproducible in a short time, and a plate material having a higher bonding strength can be obtained in the present invention. The plate material repaired and reinforced by the method of the present invention has a high reinforcing effect, and therefore, the plate material reinforced in this manner is suitably used for construction members. Especially when this construction member is used for repairing cracks or seismic reinforcement of concrete structures such as piers of railways and roads, pillars, beams and walls of buildings, a more robust concrete structure can be obtained, and construction Great effect.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a laminate of a plate material in which a metal plate and a carbon fiber sheet are laminated on the plate material.

FIG. 2 is a cross-sectional view of a laminate of plate materials in which metal plates are laminated.

FIG. 3 is a cross-sectional view of a U-shaped steel plate to which a backing plate is adhered.

FIG. 4 is a cross-sectional view of a concrete pillar reinforced with earthquake resistance.

FIG. 5 is a cross-sectional view of a plate material in which a corroded portion has been repaired.

[Explanation of symbols]

 1a, 1b, 1c, 1d, 1e Plate material 2a, 2b, 2c, 2d, 2e Metal plate 3a, 3b, 3c, 3d, 3e Carbon fiber sheet 4a, 4b Metal plate 5, 5a, 5b U-shaped steel plate 6 , 6a, 6b Backing plate 7 Reinforced concrete column 8 Mortar 9 Corroded part

Claims (5)

[Claims] 1. A method for laminating a plate material, comprising laminating a plate material, a metal plate and a fiber sheet, wherein the metal plate is laminated so as to face the plate material. . 2. The method of laminating plate materials according to claim 1, wherein a laminate composed of a metal plate and a fiber sheet is laminated over adjacent plate materials. 3. A laminate obtained by laminating the plate materials according to claim 1 or 2. 4. The laminate according to claim 3, wherein the plate material is used for a construction member. 5. The laminate according to claim 4, wherein the construction member is used for a concrete structure.