JP2002256707A - Repair and reinforcement sheet for concrete structures and method for repair and reinforcement of concrete structures - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate the operation of applying an adhesive and paint at a construction site and facilitate construction work. SOLUTION: A sheet for repairing and reinforcing a concrete structure is provided as a lamination having a protective layer and a sticking layer. A method of repairing and reinforcing a concrete structure by sticking the sheet to the surface of the structure is provided. The side of the sheet where the protective layer exists is further laminated with a reinforcing layer made of one or more kinds of fibers selected from the group consisting of polyester fibers, polyamide fibers, vinylon fibers, carbon fibers, and polyolefin fibers.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to the repair and reinforcement of concrete structures, and more specifically, to the concrete of concrete structures, which is caused by cold joints, neutralization, salt damage, etc. Repair and reinforcement of sheets and concrete structures that prevent peeling and lifting due to peeling or floating due to the above factors, or peeling and floating due to the above factors It is about the method.

[0002]

2. Description of the Related Art Concrete structures have been considered to be durable for a long period of time, but concrete of aged concrete structures has recently been subjected to cold joints, neutralization, alkali-aggregate reaction, and frost damage. Due to various reasons such as salt damage or poor construction, water leakage due to peeling and cracking as concrete pieces and cracking has become a social problem.

[0003] Conventionally, when there is a risk of concrete peeling and falling, first clean the concrete surface cleanly,
Then, depending on the degree of deterioration of the concrete, apply impregnating material, reinforcing steel rust preventive material, cross section repairing material, crack injection material, etc. as necessary, and after applying the undercoat material, use a base adjustment material such as putty to smoothen etc. And perform the primary finishing. Next, as a surface coating material, perform secondary finishing with various paints, architectural finish coating materials, coating film waterproofing materials, molded plates, etc., or apply an adhesive after the primary finishing, and then repair or reinforce it A woven or knitted fabric is adhered, an adhesive is further applied and hardened, and after drying and solidification, an undercoat material is applied again, and a weather-resistant paint is applied thereon to perform secondary finishing.

As an adhesive, an epoxy-based or rubber-based adhesive is used.
Acrylic resin, urethane resin, fluorine resin and the like are used as the paint. Cement, silicic acid, acrylic resin, etc. are used as building finishing materials.
An RC, an aluminum plate, a PIC plate or the like is used.

[0005]

However, these operations are heavy work because they are performed at high places, require hardening and curing, and require a long construction period, resulting in high construction costs.
Depending on the conditions at the construction site, quality control may be difficult, and there are problems such as excessive specification design in order to ensure predetermined quality.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has been made in an environment where the operation of applying an adhesive or a paint on site is simplified, the construction is facilitated, and quality control is easily performed in advance. The aim is to reduce hard labor, shorten the construction period, and stabilize the quality by prefabricating the components below.

[0007]

Means for Solving the Problems The present inventors have conducted intensive studies to achieve the above object, and as a result, in the method of repairing / reinforcing concrete structures, a woven fabric, a knitted fabric, an adhesive, An adhesive layer for facilitating the adhesion between the outer layer material as a protective layer having weather resistance, antifouling properties, waterproofness, etc. and the concrete surface, instead of performing secondary finishing by repeatedly painting with agents or paints It has been found that by preliminarily laminating the inner layer material as a laminated body and attaching the laminated body on site, the work of repair and reinforcement to prevent the concrete from falling off can be reduced or shortened. As a result, the present invention has been accomplished.

[0008] The present invention provides (1) a sticking layer for sticking the laminate to the concrete structure integrally with an adhesive;
A laminate having a protective layer for protecting the adhesive and the adhesive layer, or a laminate in which a reinforcing layer is further laminated on the laminate, for repairing and reinforcing concrete structures. And (2) the repair / reinforcement sheet is attached to a concrete structure by using an adhesive to attach an adhesive layer of the sheet and a surface of the concrete structure to the concrete structure.・ Provide reinforcement methods.

That is, the repair / reinforcement sheet for a concrete structure according to the present invention is obtained by previously laminating a protective layer and a sticking layer to form a laminate.

Here, the repair / reinforcement sheet for a concrete structure of the present invention may further include a reinforcement layer in addition to the protective layer and the adhesive layer. And the reinforcing layer is woven, knitted,
It is preferable that the fiber base material is composed of one or more fiber substrates selected from a nonwoven fabric and a laminated fabric, and among these, the fiber substrate is a multiaxial laminate in which two or more yarns are crossed in a mesh pattern and laminated. More preferably, it is a cloth. Such a fiber substrate is preferably made of one or more fibers selected from the group consisting of polyester fibers, polyamide fibers, vinylon fibers, carbon fibers, glass fibers and polyolefin fibers.

In the above-mentioned laminate, the protective layer is selected from the group consisting of a fluorine resin, an acrylic resin, an acrylic silicone resin, an acrylic fluorine resin, a silicone resin, a urethane resin and a chlorine resin. It is preferable that the protective layer is a synthetic resin layer composed of a kind or two or more kinds of synthetic resins, and the protective layer has a photocatalytic layer on its surface.

Further, in the above-mentioned laminate, the sticking layer is preferably made of one or more fiber substrates selected from the group consisting of woven fabric, knitted fabric, nonwoven fabric, laminated fabric and paper. It is more preferable that such a fiber substrate is one or two or more fiber substrates selected from the group consisting of polyester fibers, polyamide fibers, vinylon fibers, carbon fibers, glass fibers and polyolefin fibers.

The method for repairing / reinforcing a concrete structure according to the present invention provides a method for repairing / reinforcing a concrete structure according to (1), wherein the sheet for repairing / reinforcing a concrete structure is attached to the concrete structure, and the adhesive layer of the sheet and the surface of the concrete structure. And a method of repairing and reinforcing a concrete structure, characterized in that the method is applied using an adhesive.

Here, the adhesive for adhering the adhesive layer to the surface of the concrete structure includes an epoxy adhesive, a urethane adhesive, a silicone adhesive, a rubber adhesive, a vinyl ester adhesive, and a polyester adhesive. It is preferable to use one or more adhesives selected from the group consisting of an adhesive, a polymer cement adhesive, an acrylic adhesive, and a polyolefin adhesive. In the sheet of the present invention, it is preferable that at least one end is formed with a connection portion formed by removing at least a protective layer in a strip shape.

Hereinafter, the present invention will be described in more detail. The repair / reinforcement sheet for a concrete structure according to the present invention is a method for repairing / reinforcing a concrete structure, in which a woven fabric, a knitted fabric, an adhesive or a paint is used as a surface coating of the concrete structure instead of repeatedly coating. Laminating the inner layer material as an adhesive layer for facilitating adhesion to the concrete surface and the outer layer material as a protective layer having weather resistance, antifouling property, waterproofness, saltproofness, etc. By sticking the laminate on site, it is possible to reduce and shorten the repair and reinforcement work for preventing the concrete from coming off, and to stabilize the quality.

In the present invention, the thus obtained laminate may be a laminate in which a reinforcing layer is further laminated on the side (inside) of the protective layer on which the adhesive layer is present. There is no particular limitation on the position where the reinforcing layer is laminated as long as it is inside the protective layer. From the viewpoint that the sheet of the present invention reinforces the concrete structure, it is preferable that the reinforcing layer is located inside the adhering layer because the reinforcing layer is surely integrated with the adhesive.
Further, as described later, when the reinforcing layer is between the protective layer and the sticking layer, the production can be facilitated. This reinforcing layer is laminated for the purpose of increasing physical strength in order to prevent breakage of the repair / reinforcement sheet of the concrete structure of the present invention, and the physical strength is laminated with the protective layer and the adhesive layer to form an adhesive. When integrated with a concrete piece, or, if the concrete piece peels, if there is a layered thing that is strong enough to withstand the weight and prevent falling, there is no particular limitation, A fiber base such as a woven fabric, a knitted fabric, a nonwoven fabric, or a laminated fabric made of synthetic resin, inorganic or natural fiber, a synthetic resin or metal sheet, or the like can be used.

The sheet of the present invention is attached to concrete,
The adhesive used for construction is sufficiently impregnated in the adhesive layer,
The layer in which the adhesive and the adhesive layer are integrated prevents the concrete from peeling or falling. Therefore, when laminating the reinforcing layer, it is preferable to take care that the adhesive for construction sufficiently impregnates the reinforcing layer.

From such a viewpoint, the reinforcing layer is preferably a fibrous base material which easily absorbs the adhesive for construction. Among them, the reinforcing layer is selected from woven fabric, knitted fabric, non-woven fabric and laminated fabric.
More preferably, it is composed of one or more fiber substrates. Such fiber bases include polyester fibers,
It is more preferable that it is composed of one or more fibers selected from the group consisting of polyamide fibers, vinylon fibers, carbon fibers, glass fibers and polyolefin fibers. Among these, polyester fibers, polyamide fibers, vinylon fibers, and polyolefin fibers are particularly preferable because they are light and have excellent strength. These fibers may be blended, may be used separately for warp and weft, or may be laminated in multiple layers. Further, it may be laminated with a synthetic resin layer.

From the above viewpoint, the form of the fibrous base material is preferably a woven fabric, a knitted fabric, a nonwoven fabric or a laminated fabric. Specifically, spunbond, nonwoven fabric made by melt blown or needle punch, woven or knitted fabric woven or knitted by spinning monofilament or multifilament or short fiber of long fiber, and furthermore, two or more A multiaxial laminated cloth in which yarns are crossed in a mesh pattern and laminated can be given.

Among these, a multiaxial laminated cloth having an open mesh is preferred. The reason is that when the reinforcing layer is inside the adhesive layer, the adhesive for construction will sufficiently impregnate the reinforcing layer and the adhesive for construction will penetrate the mesh of the multiaxial laminated cloth and reach the adhesive layer. This becomes easy. Also,
When the reinforcing layer is present between the protective layer and the adhesive layer,
When the sheet of the present invention is formed into a laminate, a multi-layer laminated fabric is obtained by applying a laminating adhesive to a film serving as a protective layer, and overlapping and pressing the adhesive layer so that the reinforcing layer is on the inside. Since it is easy for the laminating adhesive to penetrate the mesh and reach the adhesive layer, both can be laminated in a single operation, the number of steps is small, and the lamination between the adhesive layer and the reinforcing layer This is because the adhesive does not intervene, so that the reinforcing layer easily absorbs the adhesive for construction. In addition, when laminated in this way, since the bonding layer adheres to the laminating adhesive applied to the protective layer at the mesh portion of the multiaxial laminated fabric, the opening ratio of the mesh is as large as the desired strength can be obtained. It is preferable that the opening ratio of the mesh is small as long as it is formed in the laminate. This is because even when the adhesion between the adhesive layer and the reinforcing layer is weak, the construction adhesive when the sheet of the present invention is applied strongly adheres the adhesive layer to the reinforcing layer.

As such a multiaxial laminated cloth, for example,
The intersections are bonded using two or more yarns such as a triaxial mesh in which the intersections are bonded using three yarns or a wariff (registered trademark of Nisseki Chemical Co., Ltd.) in which vertical and horizontal fibers are bonded, a biaxial orthogonal laminated cloth Can be mentioned. Among these, a multiaxial laminated fabric having three or more axes is more preferable because it has excellent strength against tension from various directions such as not only in the vertical and horizontal directions but also in an oblique direction.

These reinforcing layers may be used as long as the overall strength of the repair / reinforcement sheet of the present invention is such that the strength of supporting the separated concrete pieces when a part of the concrete structure is separated can be secured. Although there is no limitation on the strength of itself, it is preferably 1500 N or more at a displacement of 10 mm or more in a punching test specified by the Japan Highway Public Corporation, and when the above strength range is satisfied with a laminate of only a protective layer and a sticking layer Does not require the provision of a reinforcing layer. In the present specification, what is referred to as a sheet is not limited to the thickness and rigidity, but includes a thin and flexible film and a relatively rigid plate. And
The shape may be a single sheet or a roll-shaped winding.

In the above-mentioned laminate, the protective layer is for preventing the layer in which the adhesive and the adhesive layer are integrated when the sheet of the present invention is applied from being damaged by external factors, and has a weather resistance and an antifouling property. It is an outer layer that imparts functions such as water resistance, waterproofness, and salt barrier properties. Accordingly, the protective layer is made of one or more selected from the group consisting of a fluororesin, an acrylic resin, an acrylic silicone resin, an acrylic fluororesin, a silicone resin, a urethane resin and a chlorine resin. It is preferably a synthetic resin layer made of a synthetic resin. In forming these resin layers, the resin may be melt-extruded at the time of lamination. However, it is preferable to use a resin that has been molded into a film in advance, since the lamination work with the reinforcing layer and the adhesive layer becomes easy. These synthetic resin layers may be a mixture of a plurality of synthetic resins, or may be stacked in multiple layers. Then, from the viewpoint of preventing adhesion of dirt, it is preferable that the protective layer is provided with a photocatalyst layer made of a metal oxide such as titanium oxide on its surface to impart a self-cleaning function.

The sheet for repair / reinforcement of a concrete structure may be stained, damaged or damaged during the construction work. Therefore, on the outer surface of the protective layer, polyethylene terephthalate (PET) or the like is used to prevent such damage. It is preferable to coat a polyester film such as polyester film, polyamide film such as 6 nylon, or a polyolefin film such as polyethylene or polypropylene with a peelable masking film which is slightly tackified with an acrylic or rubber adhesive. Above all, when the repair / reinforcement sheet is applied, a PET film having excellent heat resistance and strength is preferable because the adhesive of the application may be increased in fluidity by using a heating roller or an iron to increase the fluidity of the adhesive. When a heating roller or the like is used, the adhesive for construction is extruded from the edge of the sheet of the present invention and may adhere to the protective layer of an adjacent sheet, but by laminating a masking film. Such a situation can be avoided.

The adhesive layer of the releasable masking film is used to prevent the repair / reinforcement sheet from being hardened by laminating the masking film, thereby reducing the ability to follow a bent portion during construction. In order to facilitate the start of peeling, it is preferable to provide partial adhesion, for example, in the form of a mesh, a dot, a stripe, or the like. Further, in order to facilitate the start of peeling, it is preferable to provide slits or perforations in the masking film, or to partially insert and laminate a paper tape to serve as an auxiliary means for starting peeling.

In the above-mentioned laminate, since the adhesive layer is integrated with the adhesive for bonding to the concrete structure and becomes a part of the adhesive layer, the adhesive layer may be cracked or delaminated. It is preferable to use a material which has good familiarity with the adhesive used at the time of construction so that the entire layer can be easily impregnated with the adhesive. The adhesive layer also prevents concrete from peeling or falling when integrated with the adhesive. From these viewpoints, it is preferable that the fiber base material is selected from a woven fabric, a knitted fabric, a nonwoven fabric, a laminated fabric, and a paper. Examples of the fiber base material include natural fibers such as pulp, cotton, and hemp, and polyester fibers. It is preferable that the fibers are made of one or more fibers selected from the group consisting of polyamide fibers, vinylon fibers, carbon fibers, glass fibers and polyolefin fibers.
These fibers may be blended, may be used separately for warp and weft, or may be laminated in multiple layers. The paper may be corrugated.

[0027] Among them, coarse and thin shapes are preferable to the extent that the adhesive for construction easily penetrates and impregnates. Thin nonwoven fabrics such as dry nonwoven fabric, spunbond type and meltblown type, woven fabrics and laminated fabrics are particularly preferred. preferable.
And the same fiber base material as the above-mentioned reinforcing layer can also be used. The use of the same fibrous base material as the reinforcing layer is preferable because the adhesive layer can also serve as part or all of the reinforcing layer, and the repair / reinforcement sheet can be made thin and flexible.

In the sheet of the present invention, if at least one end of the sheet has a protective layer removed in the form of a strip to form a connection portion exposing the adhesive layer and / or the reinforcing layer, for example, When a large number of leaf-like sheets of the present invention are used side by side, even when the end portions of the protective layer are attached to a concrete structure with the end portions thereof attached to each other, the attaching layer and / or the reinforcing layer can be sunk under the adjacent sheet. it can. By performing the construction in such a state, the repair / reinforcement effect of the concrete structure at the boundary between the adjacent sheets is not reduced. From such a viewpoint, since each sheet has a predetermined adhesive strength secured by the adhesive layer, it is preferable that only the reinforcing layer remains in consideration of the impregnation of the adhesive for construction.

Further, the present invention provides a method for repairing / reinforcing a concrete structure, which comprises attaching the above-mentioned sheet for repairing / reinforcing a concrete structure to the surface of the concrete structure using an adhesive. .

In the method for repairing / reinforcing a concrete structure according to the present invention, at least the adhesive layer of the sheet for repairing / reinforcing a concrete structure described above is integrated with an adhesive and attached to the concrete structure. At the time of sticking, it is preferable to use a heating roller or an iron to increase the flowability of the construction adhesive and then press the adhesive. With this construction, the adhesive layer and the reinforcing layer are sufficiently impregnated with the adhesive, and the air in the adhesive layer can be expelled, so that the adhesive strength can be increased. When a large number of sheet-like sheets of the present invention are used side by side, the ends of the sheets may be overlapped with each other. There is no appearance and the appearance after construction is good. In this case, it is preferable to use a sheet in which at least one end of the sheet is provided with a connection portion formed by removing at least the protective layer in a strip shape, since the adhesive layer and / or the reinforcing layer can be sunk under the adjacent sheet. .

Here, the adhesive layer for construction includes an epoxy adhesive, a urethane adhesive, a silicone adhesive, a rubber adhesive, an acrylic adhesive, a polymer cement adhesive, a vinyl ester adhesive. It is preferable that the adhesive layer is composed of at least one adhesive selected from the group consisting of an adhesive, a polyester adhesive and a polyolefin adhesive.

These adhesives are preferably curable adhesives because high adhesive strength can be obtained. If it is a curable adhesive, it can be cured at room temperature, cured by heat, cured by moisture, electron beam,
It may be an energy ray curing type such as ultraviolet rays and visible light,
There is no particular limitation on the curing method. Two or more of these adhesive layers may be laminated. Among these adhesives, an epoxy-based adhesive is preferable because of its high adhesive strength and excellent durability, and a two-pack curable epoxy-based adhesive is particularly preferable.

[0033]

Embodiments of the present invention will now be described with reference to the drawings. FIG. 1 is a sectional view showing an embodiment of a sheet for repairing and reinforcing concrete structures according to the present invention.

This sheet is laminated in the following procedure. First, a polyvinyl fluoride film (thickness 2
A urethane-based two-component curable adhesive (solid content: 3 to 50 g / m ² ) as the laminating adhesive ²
Is coated and dried, and as a reinforcing layer 3, a triaxial laminated cloth in which multifilaments of vinylon triaxial mesh (800 to 4000 deniers) are crossed and adhered so as to form a regular triangular mesh having a side of about 10 to 40 mm. ) And sticking layer 4
As a whole, a sheet 10 for repair / reinforcement of a concrete structure is formed by laminating a spunbonded nonwoven fabric (basis weight of about 12 to 70 g) made of polyester fiber and dry laminating the same. The synthetic resin layer serving as the protective layer 1 used here may be formed on the reinforcing layer 3 or the sticking layer 4 by a method such as melt extrusion or the like. It may be laminated on the reinforcing layer 3 or the sticking layer 4 by a method such as heat lamination.

FIG. 2 shows an embodiment in which the above-mentioned sheet for repair / reinforcement of a concrete structure is applied to the surface of the concrete structure. This repair / reinforcement construction is performed in the following procedure.

First, the surface of the concrete structure 6 is subjected to a latence treatment and unevenness correction using a disk sander or the like, and then a primer is applied and dried, and then an epoxy resin adhesive is applied to the surface as a working adhesive 5. I do. It was attached to this surface via the attaching layer 4 of the above-mentioned sheet 10 for repairing and reinforcing concrete structures. Adhesive for construction 5
When the adhesive layer 4 was impregnated into the adhesive layer 4 and cured, the repair / reinforcement sheet 10 for the concrete structure was firmly adhered to the surface of the concrete structure 6.

FIG. 3 is a sectional view showing another embodiment of a sheet for repairing and reinforcing concrete structures according to the present invention.

This sheet is laminated in the following procedure. First, a polyvinyl fluoride film (same as that of FIG. 1) and a low-density polyethylene film for reinforcement (thickness: 15 to 50)
The protective layer 1 is formed by dry laminating the adhesive 2 (approximately μm) with a laminating adhesive 2 (urethane-based two-component curable adhesive, solid content conversion: 3 to 5 g / m ² ). Then, this protective layer 1
And a vinylon triaxial mesh (same as that shown in FIG. 1) as a reinforcing layer 3 and a laminating adhesive 2 (low density polyethylene 1
Extrusion lamination at about 5 to 100 μm) and spunbonded nonwoven fabric as the adhesive layer 4 (same as that in FIG. 1)
To laminating adhesive 2 (low density polyethylene 15-1)
(About 00 μm), and the repair / reinforcement sheet 10 for the concrete structure is formed as a whole.

FIG. 4 is a cross-sectional view in which the repair / reinforcement sheet for the concrete structure of FIG. 3 is applied to the surface of the concrete structure in the same manner as in FIG. FIG. 5 shows the protective layer 1 and the adhesive layer 4 at the end of the repair / reinforcement sheet 10 of the present invention.
Is a cross-sectional view of a structure in which is removed in a strip shape and only the reinforcing layer 4 is exposed. FIG. 6 is a cross-sectional view showing a state in which the repair / reinforcement sheet 10 of the present invention shown in FIG. The reinforcement layer 3 is sunk between the adhering layer 4 of the adjacent repair / reinforcement sheet 10 and the concrete structure 6, and the boundary between the adjacent repair / reinforcement sheets 10 is reinforced.

The repair and repair method according to the present invention shown in FIGS.
The reinforcing sheet and the repair / reinforcement method using them are as follows. An epoxy resin adhesive is applied to the surface of a concrete structure, a fibrous base material is adhered, an adhesive is further applied and solidified, and after drying and solidifying, a primer is applied. In comparison with the conventional repair / reinforcement method of applying a weather-resistant paint, there was no inferiority.

Further, the repaired and reinforced concrete structure as described above may require additional load bearing capacity over time. Specifically, in the case of a floor slab or a main girder, an increase in the wheel load, and in a wall height column, an increase in the load due to additives may be considered.

Re-reinforcing a concrete structure having insufficient load-bearing capacity is to improve the resistance to bending and shearing sectional forces by using a steel plate or a continuous fiber sheet formed plate as a reinforcing member.

For the re-reinforcement, it is usual that the repair / reinforcement sheet previously attached is removed from the concrete structure, the concrete surface is exposed, a foundation treatment is performed, and the reinforcing member is attached with an adhesive.

According to the present invention, as shown in FIG. 7, the protective layer 1, the laminating adhesive 2, the reinforcing layer 3, and the adhering layer 4 which are adhered to the concrete structure 6 previously adhered using the construction adhesive 5 as shown in FIG. After the adhering material on the surface of the protective layer 1 of the sheet is cleaned with water, a neutral detergent, a solvent such as acetone, or the like, the reinforcing member 7 made of a steel plate is replaced with the adhesive 8 for the reinforcing member. Can be attached using

As shown in FIG. 8, a pair of cutter grooves 11 are formed in the sheet, and an adhesive 13 similar to the reinforcing member 7 shown in FIG.
An adhesion strength test was conducted by a Kenken-type tensile test.

As a result, destruction from the concrete base material was confirmed. That is, since the sheet 10 is broken from concrete without breaking the interface of each layer and the base material of each layer against the tensile force from the surface, the load bearing capacity of the concrete structure can be obtained without removing the sheet. Reinforcement for shortage is possible.

The present invention is not limited to the above construction. For example, the repair / reinforcement sheet of the present invention may be any of the following. Polyvinyl fluoride film / adhesive / aromatic polyamide mesh / PET non-woven fabric・ Polyvinyl fluoride film / adhesive / low density polyethylene film / extruded polyethylene / vinylon mesh /
PET nonwoven fabric ・ Polyvinyl fluoride film / adhesive / low density polyethylene film / extruded polyethylene / polyethylene mesh / extruded polyethylene / PET nonwoven fabric ・ Polyvinyl fluoride film / adhesive / aromatic polyamide nonwoven fabric ・ Polyvinyl fluoride film / adhesive / low High density polyethylene film / extruded polyethylene / PET nonwoven fabric ・ Polyvinyl fluoride film / adhesive / PET nonwoven fabric ・ Polyvinyl fluoride film / adhesive / PET woven fabric ・ Polyvinyl fluoride film / adhesive / vinylon woven fabric Can also. The film serving as a protective layer is not limited to polyvinyl fluoride, but may be polytetrafluoroethylene, tetrafluoroethylene-hexafluoropropylene copolymer, tetrafluoroethylene-perfluoroalkylvinyl ether copolymer, polychlorotrifluoroethylene, or polyfluoroethylene. A polyvinyl chloride film, an acrylic film and the like can be selected in addition to a fluorine-based film such as vinylidene chloride, ethylene-tetrafluoroethylene copolymer, and ethylene-chlorotrifluoroethylene copolymer.

[0048]

The repair / reinforcement sheet for a concrete structure according to the present invention is processed in advance, so that sufficient quality control can be performed and a repair / reinforcement sheet of stable quality can be provided. it can. Moreover, since the concrete repair / reinforcement method according to the present invention is performed by attaching a sheet for repair / reinforcement of the concrete structure according to the present invention at the construction site, the on-site work can be reduced, and the construction period can be reduced. It is possible to provide a repair / reinforcement method having a quality equal to or higher than that of the related art while reducing the construction cost and shortening the construction cost.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of a sheet for repairing and reinforcing concrete structures according to the present invention.

FIG. 2 is a cross-sectional view showing one embodiment in which a sheet for repair / reinforcement of a concrete structure according to the present invention is applied to the surface of a concrete structure.

FIG. 3 is a sectional view showing another embodiment of a sheet for repairing and reinforcing concrete structures according to the present invention.

FIG. 4 is a sectional view showing another embodiment in which a sheet for repair / reinforcement of a concrete structure according to the present invention is installed on the surface of a concrete structure.

FIG. 5 is a sectional view showing still another embodiment of a sheet for repairing and reinforcing concrete structures according to the present invention.

FIG. 6 is a sectional view showing still another embodiment in which a sheet for repair / reinforcement of a concrete structure according to the present invention is applied to the surface of a concrete structure.

FIG. 7 is a diagram showing a sheet for repair and reinforcement of a concrete structure according to the present invention applied to a surface of the concrete structure;
It is sectional drawing which shows the state which performed re-reinforcement.

FIG. 8 shows a sheet for repair / reinforcement of a concrete structure according to the present invention applied to a surface of the concrete structure.
It is an installation sectional view of the Kenken type tension test which shows the state where re-reinforcement was given.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Protective layer 2 Adhesive for minate 3 Reinforcement layer 4 Adhesive layer 5 Adhesive for construction 6 Concrete structure 7 Reinforcement member 8 Reinforcement adhesive 10 Repair / reinforcement sheet

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Michio Tezuka 3-18 Kanda Nishikicho, Chiyoda-ku, Tokyo, Japan Inside Shobond Construction Co., Ltd. (72) Shiro Yamamoto 56 Imaiue-cho, Nakahara-ku, Kawasaki-shi, Kanagawa Fujimori Kogyo Co., Ltd. (72) Inventor Yasunari Ueda 56 Imaiue-cho, Nakahara-ku, Kawasaki-shi, Kanagawa Prefecture F-term (reference) 2E176 AA01 BB29

Claims (14)

[Claims] 1. A sheet for repairing and / or reinforcing the concrete structure by attaching the concrete structure to a place where the concrete may peel and / or fall by using an adhesive. ,
The sheet is a laminate having an adhesive layer integrated with the adhesive and adhering the sheet to the concrete structure, and a protective layer for protecting the adhesive and the adhesive layer. For repairing and reinforcing concrete structures. 2. The sheet according to claim 1, wherein a reinforcing layer for increasing the physical strength of the sheet is further laminated on a side of the protective layer on which the adhesive layer is present. 2. The repair / reinforcement sheet for a concrete structure according to 1. 3. The fiber substrate according to claim 2, wherein the reinforcing layer is one or more fiber substrates selected from the group consisting of a woven fabric, a knitted fabric, a nonwoven fabric, and a laminated fabric. For repair and reinforcement of concrete structures. 4. The repair / reinforcement for a concrete structure according to claim 3, wherein the fiber base material is a multiaxial laminated cloth in which two or more yarns are crossed in a mesh shape and laminated. Sheet. 5. The method according to claim 1, wherein the fiber base material of the reinforcing layer is made of one or more fibers selected from the group consisting of polyester fibers, polyamide fibers, vinylon fibers, carbon fibers, glass fibers, and polyolefin fibers. Repair / repair of a concrete structure according to claim 3 or 4,
Sheet for reinforcement. 6. The synthetic resin according to claim 1, wherein the protective layer is one or more synthetic resins selected from the group consisting of fluororesins, acrylic resins, urethane resins, acrylic silicone resins, silicone resins and chlorine resins. The repair / reinforcement sheet for a concrete structure according to any one of claims 1 to 5, wherein the sheet is for repairing and reinforcing a concrete structure. 7. The repair / reinforcement sheet for a concrete structure according to claim 1, wherein a masking film is laminated on the protective layer. 8. The repair / reinforcement sheet for a concrete structure according to claim 1, wherein the protective layer has a photocatalytic layer on a surface thereof. 9. The method according to claim 1, wherein the adhesive layer is one or two or more fiber substrates selected from the group consisting of woven fabric, knitted fabric, nonwoven fabric, laminated fabric and paper. Repair or repair of concrete structures described in any of the items
Sheet for reinforcement. 10. The fibrous base material of the adhesive layer is made of one or more fibers selected from the group consisting of natural fibers, polyester fibers, polyamide fibers, vinylon fibers, carbon fibers, glass fibers, and polyolefin fibers. The repair / reinforcement sheet for a concrete structure according to claim 9, wherein: 11. The concrete structure according to claim 1, wherein at least one end of the sheet has a connection portion formed by removing at least the protective layer in a strip shape. Repair / reinforcement sheet. 12. The repair / reinforcement sheet for a concrete structure according to any one of claims 1 to 11, wherein the sheet for adhering the sheet and the surface of the concrete structure are provided with an adhesive. A method for repairing and reinforcing concrete structures, characterized by using and attaching. 13. The adhesive according to claim 1, wherein the adhesive is an epoxy adhesive, a urethane adhesive, a silicone adhesive, a rubber adhesive, a vinyl ester adhesive, a polyester adhesive, a polymer cement adhesive, or an acrylic adhesive. Or 2 selected from the group consisting of polyolefin adhesives and
13. The method for repairing and reinforcing a concrete structure according to claim 12, wherein the adhesive is at least one kind of adhesive. 14. The repair / reinforcement sheet for a concrete structure according to claim 1 or 2, which is attached to a concrete structure by using an adhesive to attach a sticking layer of the sheet and a surface of the concrete structure. A method for repairing and reinforcing a concrete structure, further comprising attaching a continuous fiber sheet, a formed plate of the continuous fiber sheet, and a steel sheet as a reinforcing member to the surface of the sheet with an epoxy resin adhesive.