JP3974501B2 - Structure repair method and adhesive tape for repair - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a structure repair method and a repair adhesive tape, and more particularly to a structure repair method for repairing a repaired part such as a cracked part of a structure made of concrete or the like and a repair adhesive tape used therefor.
[0002]
[Prior art]
Conventionally, when cracks or the like occur in a concrete or stone-based structure, a method of repairing by injecting an adhesive or putting in a putty at the cracked part is generally employed at the time of repair. For the injection of the adhesive, for example, an adhesive injection device (hereinafter also referred to as “resin injection member”) as shown in Patent Documents 1 to 3 is used.
[0003]
The process of repairing a cracked concrete structure using the resin injection member is as follows.
[0004]
(1) Polish the surface of the concrete structure along the cracks with a sander (surface treatment).
[0005]
(2) Apply a putty-like sealant (which hardens after hardening) along the crack.
[0006]
(3) Attach the resin injection member from above the sealing material through the seat.
[0007]
(4) The resin is injected from the resin injection member into the cracked portion.
[0008]
(5) When the injected resin is cured, remove the resin injection member and polish the sealing material to smooth the concrete surface.
[0009]
[Patent Document 1]
Japanese Patent Publication No. 64-7189 [Patent Document 2]
Japanese Patent Publication No. 2-59903 [Patent Document 3]
Japanese Patent Publication No. 3-80954 [Problems to be solved by the invention]
However, the method of repairing using the resin injecting member is a method with higher work efficiency, such as, for example, curing is required until the putty-like sealing material is cured, and the work for each process takes a lot of time. Was desired. In addition, it is necessary to perform post-treatment such as surface polishing on the cured sealing material by means such as sanding due to appearance problems, and dust and noise are generated during this work, and measures to prevent it are necessary. Moreover, since the sealing material is opaque, the injection state cannot be visually confirmed at the time of injection, and it has been difficult to accurately determine whether or not the cracked portion has been reliably filled.
[0010]
Therefore, the object of the present invention is to repair a structure in which the work process is short in view of the above-mentioned problems of the prior art and can be repaired by reliably filling a defective part (repaired part) such as a cracked part with resin. It is to provide a method and an adhesive tape for repair.
[0011]
[Means for Solving the Problems]
The above object can be achieved by the inventions described in the claims. That is, the characteristic configuration of the repair method for a structure according to the present invention is such that an adhesive tape is attached so as to cover the surface of the repaired portion of the structure, and a hole formed in a predetermined portion of the adhesive tape is covered. Is a structure repairing method in which a seat and a resin injection member connected thereto are mounted, resin is injected through the resin injection member, and then the adhesive tape is peeled off. A laminate of a cloth and a plastic film is used as a base material, and an adhesive layer is provided on at least one side of the base material .
[0012]
According to this configuration, it is only necessary to apply the adhesive tape to the repaired portion without using a putty-like sealant, and therefore no curing time is required until the sealant is cured. The work time is remarkably shortened, and the surface where the tape is peeled off after curing the injected resin is smooth, so that no troublesome smoothing after the fact is necessary, and the workability is excellent and the work efficiency is high. It becomes a structure repair method. In addition, by attaching a seat and a resin injection member connected to the seat so as to cover the hole formed at a predetermined location of the adhesive tape , the adhesive tape is applied at the time of resin injection by the restraining force (pressure) at the time of resin injection It does not come off. Moreover, as an adhesive tape used, it is comprised so that the laminated body of a glass fiber cloth and a plastic film may be used as a base material, and an adhesive layer may be provided on at least one side of the base material. Thereby, the work at the time of peeling and removal can be carried out smoothly, and the workability is further improved. For example, the strength of the adhesive tape as a whole is improved, and the adhesive tape can be prevented from peeling off from the concrete due to the pressure when injecting epoxy resin from the resin injection member during construction. It is excellent in workability at the time of peeling and removing. In addition, by providing an adhesive layer on at least one side, there is no need to use a separate double-sided tape, etc., and the work process is short, and it is possible to reliably fill a defective part (repaired part) such as a cracked part with resin. it can. As a result, it is possible to provide a method for repairing a structure that has a short work process and can be repaired by reliably filling a resin in a defective part (repaired part) such as a cracked part.
[0013]
It is preferable to use the adhesive tape having transparency.
[0014]
According to this configuration, when the resin is injected into the repaired part such as a cracked part, the injection state can be easily visually recognized from the outside, so that it is possible to more accurately determine whether or not the cracked part has been reliably filled. .
[0017]
The pressure-sensitive adhesive layer is preferably a thermoplastic adhesive.
[0018]
According to this configuration, when the surface of the object to be repaired such as a concrete surface has many unevenness, the adhesive fluidized by heating enters the surface unevenness, and the adhesive property of the adhesive tape to the object to be repaired is remarkable. To improve.
[0021]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a cross-sectional view for explaining a repair method for a cracked portion or the like of a structure according to this embodiment.
[0022]
First, the transparent adhesive tape 2 is affixed so that the crack opening surface may be covered along the crack opening surface of the concrete structure 1 in which the crack location C which is an example of a repaired part produced. In this case, dirt or dust on the concrete surface to which the adhesive tape 2 is attached is removed in advance using a disk sander or wire brush, and then the surface of the concrete structure is blown with air or with a waste cloth. It is preferable to wipe off. Thus, since this embodiment does not use a putty-like sealing material as was done in the prior art, cracks can be seen from the outside through the transparent adhesive tape 2 and Sometimes it is possible to accurately grasp the state of resin injection and to take appropriate measures when problems occur. But it is not necessarily required that the adhesive tape 2 has transparency.
[0023]
A hole for resin injection is formed at a predetermined location of the adhesive tape 2, and a resin injection member 5 including a seat 3 and a cylindrical portion 4 connected to the hole is mounted so as to cover the hole. A filling resin such as an epoxy resin is sufficiently injected deep into the cracked portion C through the injection member 5. But the hole for resin injection | pouring formed in the predetermined location of the adhesive tape 2 may be previously formed in the predetermined location (one or two or more continuous) of the adhesive tape 2. FIG. The structure of the resin injection member 5 is not particularly limited as long as a predetermined amount of resin can be injected into the cracked portion C, but the seat 3 and the cylindrical portion 4 are securely connected to each other. It is preferable that the resin is sealed with an O-ring or the like so that the resin does not easily leak from the connection portion. Further, the cylindrical portion 4 is constituted by a pressure buffer tube made of an elastic member such as rubber, and a check valve is disposed in the cylindrical portion near the connection portion with the seat 3 to prevent backflow of the injected resin. It is preferable to have a structure capable of reliably injecting a predetermined amount of resin.
[0024]
When the cracked portion C generated in the concrete structure 1 is a plurality of locations or when one location is extremely long, the resin is injected into each crack location or in several locations (or simultaneously at a plurality of locations), and the resin is cured. After confirming this, the resin injection member 5 is removed and the adhesive tape 2 is peeled off. Thereafter, in this embodiment, the injection process is completed without particularly performing the surface smoothing process. However, when the adhesive tape 2 is difficult to peel off, it is peeled off using a tool such as a spatula. When such post-processing is performed, work that generates noise and dust, such as sanding as in the prior art, is unnecessary.
[0025]
Next, the adhesive tape 2 used in this embodiment will be described. If the adhesiveness to the concrete or stone structure and the fixing performance to the resin injection member 5 can be exhibited, there is no particular limitation on the configuration and composition, and the conventional adhesive tape is appropriately selected and used. Either a base material-less pressure-sensitive adhesive tape composed only of a pressure-sensitive adhesive layer or a pressure-sensitive adhesive tape having a base material can be used. Among these, it is preferable to use a pressure-sensitive adhesive tape having a base material, which is difficult to cut at the time of peeling, in view of peeling workability when peeling the pressure-sensitive adhesive tape from the concrete structure after resin injection / curing. As the pressure-sensitive adhesive tape having a base material, either one having a pressure-sensitive adhesive layer formed on one side of the base material or one having a pressure-sensitive adhesive layer formed on both sides of the base material can be used.
[0026]
When using an adhesive tape with an adhesive layer formed on one side of the substrate, stick the adhesive tape to the cracked part using the adhesive layer of the adhesive tape, and then add the resin injection member to the upper surface of the adhesive tape. In this case, a double-sided pressure-sensitive adhesive tape, a thermal adhesive sheet, or the like can be used as a fixing means for the resin injection member.
[0027]
When using the adhesive tape which formed the adhesive layer on both surfaces of the base material, it can stick to a concrete structure and the resin injection member (base) can be fixed with one adhesive tape. In addition, even when using an adhesive tape with adhesive layers on both sides of the substrate, other adhesive means (double-sided adhesive tape, thermal adhesive sheet, etc.) are used together to fix the resin injection member (base). It is also possible to do.
[0028]
As base materials for adhesive tapes, polyethylene terephthalate film, polyethylene film, polypropylene film, ethylene monopropylene copolymer film, polyvinyl chloride film, nylon film, polystyrene film, polyacrylonitrile film, acetate film, polycarbonate film, cellophane film, etc. Various metal films such as various plastic films, aluminum foil, stainless steel foil, copper foil, cotton, suf, natural fiber, chemical fiber, woven fabric made of glass fiber, non-woven fabric, paper and the like can be used.
[0029]
The substrate may be a single layer structure or a laminated structure. The thickness of the substrate is not particularly limited, and is usually 10 μm or more, preferably 20 to 500 μm.
[0030]
Among these, in the present invention, glass fiber cloth (glass cloth) is preferably used as the substrate. When glass fiber cloth is used for the base material, the strength of the adhesive tape as a whole is improved, and it is possible to prevent the adhesive tape from peeling off from the concrete due to the pressure when injecting epoxy resin from the resin injection member during construction. Or after the construction is completed, it is preferable because it is excellent in workability when peeling and removing the adhesive tape from the concrete surface. In this case, the substrate may be a glass fiber cloth alone or a laminate of glass fiber cloth and a plastic film such as a polyethylene terephthalate film.
[0031]
As the adhesive forming the adhesive layer of the adhesive tape, various rubber adhesives, acrylic adhesives, silicone adhesives, urethane adhesives, and the like can be used. Furthermore, you may use the thermoplastic adhesive which produces an adhesive force (adhesive force) by heating at the time of sticking, and when using this thermoplastic adhesive, it is necessary to give heat at the time of sticking. However, when there are many irregularities on the concrete surface, it is preferable in that the adhesive material fluidized by heating enters the irregularities on the surface and the adhesiveness of the adhesive tape to the concrete is improved.
[0032]
Examples of the rubber-based pressure-sensitive adhesive include natural rubber, polyisoprene rubber (IR), butyl rubber (IIR), polyisobutylene rubber, styrene-imprene-styrene block copolymer and hydrogenated product thereof, and styrene-butadiene-styrene block copolymer. It can be obtained by blending a rubber component such as a polymer and its hydrogenated product with a softener, a tackifier, a crosslinking (vulcanizing) agent, an anti-aging agent, a filler and the like. As the tackifier, petroleum resin, phenol resin, rosin resin, terpene resin and the like can be used. Although the compounding quantity of a tackifier is not specifically limited, It is 30-200 weight part per 100 weight part of rubber | gum, Preferably it is 40-170 weight part.
[0033]
As the crosslinking (vulcanizing) agent, an isocyanate crosslinking agent, a thiuram vulcanizing agent, a quinoid vulcanizing agent, a quinonedioxime vulcanizing agent, a maleimide vulcanizing agent, or the like can be used. The amount of the crosslinking (vulcanizing) agent is not particularly limited, but is 0.1 to 20 parts by weight, preferably 0.1 to 10 parts by weight per 100 parts by weight of rubber.
[0034]
The acrylic adhesive is mainly composed of various (meth) acrylic acid alkyl esters and an acrylic polymer obtained by copolymerizing a copolymerizable monomer such as (meth) acrylic acid. It can be obtained by blending a tackifier or the like. The thickness of the pressure-sensitive adhesive layer is not particularly limited, and is usually 10 μm or more, preferably 100 to 5000 μm, but 200 to 3000 μm is preferable from the viewpoint of adhesion to concrete.
[0035]
It is preferable that the above-mentioned adhesive tape has transparency, so that it is possible to check the injection state of the resin injected from the resin injection member into the cracked part, and measures are taken when problems occur during construction. Can be taken.
[0036]
【Example】
Hereinafter, although an Example demonstrates this embodiment further in detail, this invention is not limited to these at all.
[0037]
Example 1
As an adhesive tape, a polyethylene terephthalate film with a thickness of about 125 μm is coated with an adhesive layer with a thickness of about 500 μm (Quintac 3450 (trade name): Nippon Zeon Co., Ltd. 100 parts, Marukaretsu H700F (trade name): Maruzen Petroleum Chemical Co., Ltd. 65 parts, Clearon M105 (trade name): Yasuhara Chemical Co., Ltd. 50 parts, YS Resin TO-L (trade name): Yashara Chemical Co., Ltd. 20 parts, Irganox B612 (trade name): Ciba Geigy A pressure-sensitive adhesive tape having 2 parts) was used. This adhesive tape has transparency.
[0038]
Construction was carried out by the following method using the above adhesive tape. First, the adhesive tape was stuck along the crack part of concrete. In order to enhance the adhesiveness, the pressure-sensitive adhesive tape was sufficiently adhered to the concrete surface using an iron (iron surface temperature of about 220 ° C.) after the pressure bonding by hand. After sticking the adhesive tape, a hole of about φ8 mm was made in the adhesive tape using a punch. “BL injector (trade name): manufactured by Showbond Construction Co., Ltd.” is used as the resin injection member, and the instant adhesive sheet (FB-MG22D (trade name): manufactured by Nitto Shinko Co., Ltd.) is used as the seat. Then, it was adhesively fixed to the back surface of the adhesive tape (thermocompression using an iron). Then, the BL injector main body (rubber tube containing the repair injection solution) was attached to the pedestal, and the resin was injected into the cracked portion.
[0039]
(Example 2)
The base material of the adhesive tape was a glass fiber cloth (SSP-90 (trade name), manufactured by Unitika Ltd., thickness of about 0.20 mm, tensile strength (longitudinal 340 N / 25 mm or more, lateral 600 N / 25 mm or more)). Except for the above, the construction was performed in the same manner as in Example 1. This adhesive tape also has transparency that allows the opposite side to pass through the mesh of the glass fiber cloth substrate.
[0040]
(Example 3)
The base material of the adhesive tape is a polyethylene terephthalate film / glass fiber cloth having a thickness of about 125 μm (SSP-90 (trade name), manufactured by Unitika Ltd., thickness of about 0.20 mm, tensile strength (length: 340 N / 25 mm or more) , 600 N / 25 mm or more in width), and the same pressure-sensitive adhesive as in Example 1 was formed on the glass fiber cloth side with a thickness of about 300 μm to form a pressure-sensitive adhesive tape. .
[0041]
In the construction methods of the above Examples 1, 2, and 3, when the resin is injected, there is no liquid leakage from the interface between the concrete and the adhesive tape, and since the adhesive tape has transparency, the injection state is confirmed visually. I was able to. Furthermore, after the resin is cured, it is only necessary to peel the adhesive tape from the concrete, and there is no need for an operation such as polishing the concrete surface, and no problem was observed in the appearance after the operation. In particular, the pressure-sensitive adhesive tapes of Examples 2 and 3 using glass fiber cloth as the base material were able to smoothly perform the work during peeling and removal, and were excellent in workability.
[0042]
Moreover, in repairing the crack repairing part of the same area, the work of the present example was completed in about half the construction time as compared with the conventional method using the putty-like sealing material.
[0043]
[Another embodiment]
(1) Although the example which inject | pours resin to the crack location of concrete was shown in the said embodiment, the construction object of this invention is not restricted to this, It can implement also in another stone structure, and a repair location The present invention can be applied not only to cracked parts but also to various repaired parts having dents.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram for carrying out a crack repair method for a structure according to an embodiment of the present invention.
2 Adhesive tape 5 Resin injection member C Repair location

Claims (2)

Adhesive tape is attached so as to cover the surface of the repaired part of the structure, and a seat and a resin injection member connected thereto are attached so as to cover the hole formed in the predetermined part of the adhesive tape. , A structure repair method in which a resin is injected through the resin injection member, and then the adhesive tape is peeled off ,
The pressure-sensitive adhesive tape comprises a laminate of glass fiber cloth and a plastic film as a base material, and has a pressure-sensitive adhesive layer on at least one side of the base material . A pressure-sensitive adhesive tape for repair used in the structure repair method according to claim 1 .

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