JP2017066761A - Concrete-self-repair adhesive sheet and its manufacturing method, and manufacturing method for repaired concrete member using the concrete-self-repair adhesive sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a concrete-self-repair adhesive sheet which can securely inject a concrete-self-repair material into cracks.SOLUTION: A Concrete-self-repair adhesive sheet 10 in this invention comprises a base material 11 and an adhesive layer 12 formed on a main surface on at least one side of the aforesaid base material. The aforesaid adhesive layer comprises a hot-melt adhesive and a concrete-self-repair material. The aforesaid adhesive layer has melt viscosity of 2000 mPa s or less as measured by the melt viscosity test method complying to the A method under JISK6862.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a concrete self-healing adhesive sheet and a method for producing the same, and a method for producing a repairing concrete member using the concrete self-healing adhesive sheet.

  Concrete used in structures such as bridges and tunnels may crack over time due to fatigue, salt damage, or alkali aggregate reaction. If cracked for a long time, the crack will progress to the depth of the concrete and cause serious accidents such as collapse of bridges and tunnels. For this reason, repair measures are taken at an early stage when cracks occur in concrete. As a method of repairing cracks in concrete, after applying a surface treatment agent consisting of an aqueous solution containing alkali metal silicate and infiltrating the interior of the crack, the putty material in which inorganic filler is dispersed is filled into the crack. A repair method (for example, Patent Document 1) and a method for applying a paste containing a self-healing material along a cracked portion of concrete have been proposed (for example, Patent Document 2).

JP 2010-001195 A JP 2013-014453 A

  Since the cracks in the concrete constituting the structure occur randomly in the width direction and depth direction of the concrete, in the method of directly applying the repair material to the crack portion as described in Patent Documents 1 and 2, It was difficult for the repair material to be injected along the cracked portion, and as a result, there was a problem that cracks occurred again over time even after the repair.

  The present invention has been made to solve the above problems, and provides a concrete self-healing adhesive sheet capable of reliably injecting a concrete self-healing material into a cracked portion.

  The concrete self-healing adhesive sheet of the present invention is a concrete self-healing adhesive sheet comprising a base material and an adhesive layer formed on at least one main surface of the base material, wherein the adhesive layer is hot It includes a melt adhesive and a concrete self-healing material, and the melt viscosity of the adhesive layer is 2000 mPa · s or less as measured by a melt viscosity test method based on the A method defined in JIS K 6862. And

  The method for producing a concrete self-healing adhesive sheet of the present invention comprises a step of producing an adhesive layer-forming coating material comprising a hot melt adhesive, a concrete self-healing material, and a solvent, and the adhesive layer-forming coating material. Applying to at least one main surface of the material and forming an adhesive layer precursor layer on the substrate; removing the solvent from the adhesive layer precursor layer; and Forming the step.

  The method for producing a repaired concrete member of the present invention is a method for manufacturing a repaired concrete member using a concrete self-healing adhesive sheet, and the step of bonding the concrete self-healing adhesive sheet of the present invention to a concrete repairing part Heating the bonded concrete self-healing adhesive sheet to melt the adhesive layer of the concrete self-healing adhesive sheet to form a molten adhesive; and allowing the molten adhesive to penetrate into the repaired part And a step of cooling the molten adhesive and fixing it to the restoration part as a restoration concrete member.

  ADVANTAGE OF THE INVENTION According to this invention, the concrete self-repairing adhesive sheet which can repair concrete by a simple method can be provided.

FIG. 1 is a schematic cross-sectional view showing an example of a concrete self-healing adhesive sheet of the present invention. FIG. 2 is a schematic cross-sectional view showing another example of the concrete self-healing adhesive sheet of the present invention. FIG. 3 is a schematic cross-sectional view showing a state where the concrete self-healing adhesive sheet of the present invention is bonded to a concrete restoration part. FIG. 4 is a schematic cross-sectional view showing a state where the adhesive layer of the concrete self-healing adhesive sheet of the present invention is heated. FIG. 5 is a schematic cross-sectional view showing a state where the molten adhesive has penetrated into the repaired portion. FIG. 6 is a schematic cross-sectional view showing a concrete restoration portion showing a state where the restoration is completed.

(Embodiment 1)
First, the concrete self-healing adhesive sheet of the present invention will be described. The concrete self-healing adhesive sheet of the present invention includes a base material and an adhesive layer formed on at least one main surface of the base material, and the adhesive layer includes a hot-melt adhesive and a concrete self-healing property. The melt viscosity of the adhesive layer is 2000 mPa · s or less as measured by a melt viscosity test method based on the A method defined in JIS K 6862.

  According to the concrete self-healing adhesive sheet of the present invention, the adhesive layer containing the hot-melt adhesive and the concrete self-healing material can be melted by heating, and is heated after being bonded to the concrete restoration part. Thus, the concrete self-healing material can be reliably injected into the restoration part. Further, when cooled after the injection, the hot melt adhesive is cured, and the concrete self-healing material is fixed to the restoration part, and a restoration concrete member can be self-formed in the restoration part. Furthermore, since the repaired concrete member is a member having substantially the same quality as the original concrete, the concrete can be repaired without impairing the appearance of the repaired portion.

(Base material)
The base material used for the concrete self-healing adhesive sheet of the present invention serves as a base for forming an adhesive layer described later, and is finally peeled off from the adhesive layer. The substrate may be arranged on one side of the adhesive layer or on both sides.

  Examples of the substrate include a plastic substrate and a paper substrate, and among these, a plastic substrate is preferable. Specific examples of plastic substrates include polyolefin resins (low density polyethylene, linear polyethylene, medium density polyethylene, high density polyethylene, ultra-low density polyethylene, random copolymer polypropylene, block copolymer polypropylene, homopolypropylene. , Polybutene, polymethylpentene, etc.), ethylene-vinyl acetate copolymer, ionomer resin, ethylene- (meth) acrylic acid copolymer, ethylene- (meth) acrylic acid ester copolymer (random copolymer, alternating) Copolymer), ethylene-butene copolymer, ethylene-hexene copolymer, polyurethane resin, polyester resin (polyethylene terephthalate: PET, polyethylene naphthalate: PEN, polybutylene terephthalate: PBT, polybutylene naphtho) Rate: PBN, etc.), polyimide resins, polyamide resins, polyether ketone resins, polyether resins, polyether sulfone resins, polystyrene resins (polystyrene, etc.), polyvinyl chloride resins, polyvinylidene chloride resins From constituent materials such as polyvinyl alcohol resins, polyvinyl acetate resins, vinyl chloride-vinyl acetate copolymers, polycarbonate resins, fluorine resins, silicone resins, cellulose resins, and cross-linked products of these resins The base material which becomes is mentioned. Among these, polyethylene terephthalate (PET) is more preferable from the viewpoint of mechanical properties and price. These constituent materials can use 1 type (s) or 2 or more types. Moreover, the said constituent material may have a functional group as needed. Further, a functional monomer or a modifying monomer may be grafted to the constituent material.

  The surface of the base material may be subjected to a known surface treatment in order to improve adhesion with an adjacent layer. Specific examples of the surface treatment include corona discharge treatment, ozone exposure treatment, high piezoelectric impact exposure treatment, and ionizing radiation treatment. Further, the base material may be subjected to a coating treatment (such as a silicone treatment) with a primer, a primer treatment, a mat treatment, a crosslinking treatment, or the like.

  As the base material, a silicone-treated PET film or a silicone-treated PEN film is particularly preferable from the viewpoint of obtaining a highly smooth coated surface.

  The substrate may be a single layer or a laminate in which two or more layers are laminated. In addition, in the above-mentioned base material, known aids such as a filler, a flame retardant, a deterioration preventing agent, an antistatic agent, a softening agent, an ultraviolet absorber, an antioxidant, a plasticizer, and a surfactant may be added as necessary. An agent may be added.

  The thickness of the substrate is not particularly limited, but is preferably 30 to 300 μm, and more preferably 50 to 150 μm. When the thickness of the base material is less than 30 μm, the strength of the concrete self-healing adhesive sheet itself of the present invention tends to be insufficient, and when it exceeds 300 μm, the cost increases.

(Adhesive layer)
The adhesive layer includes a hot melt adhesive and a concrete self-healing material, and the melt viscosity of the adhesive layer is 2000 mPa · s as measured by a melt viscosity test method based on the A method defined in JIS K 6862. It is set as follows. The lower limit of the melt viscosity is not particularly limited, but usually about 20 mPa · s is the limit.

  By heating after bonding the adhesive layer to the concrete restoration part, the concrete self-healing material can be reliably injected into the restoration part.

  The thickness of the adhesive layer can be determined according to the depth of cracks in the repaired portion of the concrete, and is not particularly limited, but is preferably 25 μm or more and 1000 μm or less, and more preferably 50 μm or more and 500 μm or less. If the thickness of the adhesive layer is less than 25 μm, there is a tendency that the cracked surface cannot be sufficiently filled. If the thickness exceeds 1000 μm, the adhesive layer is heated to express the fluidity of the adhesive layer. Since heat is applied to the heat, it is difficult for heat to be transmitted, a predetermined viscosity is difficult to be generated, and it is difficult to be injected in the depth direction of the cracks, thus making it difficult to perform the repair function.

  Hereinafter, each component which comprises the said contact bonding layer is demonstrated.

[Concrete self-healing material]
The concrete self-healing material is not particularly limited as long as it hydrates and reacts with the cement component, and any one element selected from the group consisting of Ca, Mg, Al, Si and Fe is used. Any oxide can be used as appropriate. As the oxide containing any one of the above elements, various minerals containing the above element can also be used. Examples of the mineral containing any one of the above elements include, for example, talc, kaolinite, montmorillonite, various mica minerals, saponite, halloysite, dickite, nacrite, audrite, willemsite, saponite, hectorite, soconite, steven. Sites, swing holders, etc. The concrete self-healing material may be used alone or in combination of two or more.

  The concrete self-healing material is usually provided as a powder, but the particle size is not particularly limited as long as the dispersibility is not adversely affected.

  The concrete self-healing material is preferably contained in the adhesive layer in an amount of 5% by mass to 30% by mass. This is because if the amount of the concrete self-healing material is too small, the self-healing property of the concrete is inferior, and if the amount of the concrete self-healing material is too large, the fluidity at the time of melting decreases. For the same reason, the content of the concrete self-healing material is preferably 7 parts by mass or more and 34 parts by mass or less with respect to 100 parts by mass of the hot-melt adhesive described later.

[Hot melt adhesive]
As the adhesive for the adhesive layer, a hot melt adhesive that melts by heating and exhibits adhesiveness is used. In general, a hot melt adhesive forms an adhesive layer by melting it by heating without using water or a solvent and coating it on a substrate or the like. The adhesive layer is made of the above-mentioned concrete self-healing material. Must be included. However, it is difficult to disperse and mix the concrete self-healing material in the coating liquid when the hot melt adhesive is melted and applied. In contrast, in the present invention, the viscosity is adjusted to an arbitrary viscosity using a solvent capable of dissolving the hot melt adhesive, and the concrete self-healing material is dispersed and mixed in the hot melt adhesive at room temperature before coating. it can.

  The constituent material of the hot melt adhesive is not particularly limited, and examples thereof include polyamide hot melt resins, polyester hot melt resins, polyurethane hot melt resins, polyolefin hot melt resins, and ethylene copolymers. Examples thereof include hot melt resins, styrene-butadiene-styrene (SBS) hot melt resins, ethylene vinyl acetate (EVA) hot melt resins, butyl rubber hot melt resins, and acrylic hot melt resins. Among these hot melt resins, polyamide hot melt resins, polyester hot melt resins, polyurethane hot melt resins, ethylene copolymer hot melt resins, and EVA hot melt resins are preferable because they can be dissolved in a solvent. Furthermore, a polyester-based hot melt resin is more preferable from the viewpoint of controlling various characteristics.

  The polyester hot melt resin is synthesized by copolymerizing a diol and a dicarboxylic acid. The polyester-based hot melt resin can control the adhesion temperature and the like by combining various diols and dicarboxylic acids as raw materials. Furthermore, since the adhesiveness with the PET film used as the above-mentioned substrate is high, it is more preferable.

  Examples of the diol component used for the synthesis of the polyester hot melt resin include ethylene glycol, 1,2-propylene glycol, neopentyl glycol, 1,3-propanediol, 1,4-butanediol, 1,5. -Pentanediol, 1,6-hexanediol, 1,8-octanediol, 1,9-nonanediol, 2-methyl-1,3-propanediol, 2-butyl-2-ethyl-1,3-propanediol Aliphatic glycols such as 3-methyl-1,5-pentanediol, diethylene glycol and triethylene glycol; 1,4-cyclohexanedimethanol, 1,3-cyclohexanedimethanol, 1,1-cyclohexanedimethanol, 1,4 -Cyclohexanediethanol, tricyclodecane dimeta Lumpur, alicyclic diols such as spiro glycol, alkylene oxide adducts of bisphenol A, aromatic glycol alkylene oxide adduct of bisphenol S; polyethylene glycol, polyalkylene glycols such as polypropylene glycol; and the like. One or more of these can be selected and used.

  Examples of the dicarboxylic acid component used for the synthesis of the polyester hot melt resin include oxalic acid, malonic acid, succinic acid, glutaric acid, adipic acid, azelaic acid, sebacic acid, dodecanedioic acid, and eicosanedioic acid. Aliphatic dicarboxylic acids such as dimer acid; alicyclic dicarboxylic acids such as 1,4-cyclohexanedicarboxylic acid and 1,3-cyclohexanedicarboxylic acid; unsaturated dicarboxylic acids such as fumaric acid, maleic acid and itaconic acid; phthalic acid And aromatic dicarboxylic acids such as isophthalic acid and terephthalic acid. These dicarboxylic acid components may use derivatives such as alkyl esters and acid chlorides, and may be used alone or in combination.

  Next, the concrete self-healing adhesive sheet of the present invention will be described with reference to the drawings. FIG. 1 is a schematic cross-sectional view showing an example of a concrete self-healing adhesive sheet of the present invention. In FIG. 1, a concrete self-healing adhesive sheet 10 of the present invention includes an adhesive layer 12 on a substrate 11. FIG. 2 is a schematic cross-sectional view showing another example of the concrete self-healing adhesive sheet of the present invention. In FIG. 2, the concrete self-healing adhesive sheet 20 of the present invention includes an adhesive layer 12 on a base material 11, and further includes a base material 13 on the adhesive layer 12.

  Then, the manufacturing method of the concrete self-healing adhesive sheet of this invention is demonstrated. The method for producing a concrete self-healing adhesive sheet of the present invention includes a step of producing an adhesive layer-forming coating composition comprising the hot melt adhesive, the concrete self-healing material, and a solvent described later, and the adhesive layer formation. Applying a coating material to at least one main surface of the substrate to form an adhesive layer precursor layer on the substrate; removing the solvent from the adhesive layer precursor layer; Forming an adhesive layer on the material.

  In the method for producing a concrete self-healing adhesive sheet of the present invention, since the adhesive layer forming paint is prepared using a solvent capable of dissolving the hot-melt adhesive, the concrete self-healing material is used for the hot-melt adhesive at room temperature. Can be dispersed and mixed. For this reason, an adhesive layer having a uniform composition can be formed.

  In the method for producing a concrete self-healing adhesive sheet of the present invention, a substrate can be further bonded onto the produced adhesive layer.

  The method for applying the adhesive layer forming coating to the substrate is not particularly limited, and known coating methods such as bar coating, comma coating, gravure coating, roll coating, screen coating, die coating, etc. Can be used.

  The solvent is not particularly limited as long as it can dissolve the hot melt adhesive, and examples thereof include ester solvents and ketone solvents.

  The content of the concrete self-healing material in the adhesive layer forming paint is preferably 7 parts by mass or more and 34 parts by mass or less with respect to 100 parts by mass of the hot melt adhesive.

  Moreover, it is preferable that the said adhesive layer forming coating material further contains a crosslinking agent. When the coating material for forming an adhesive layer contains a crosslinking agent, the hardness of the hot melt adhesive can be further increased, and the strength of the repaired portion can be further increased.

  The cross-linking agent is not particularly limited as long as it can be three-dimensionally cross-linked with the main component resin component of the hot-melt adhesive. For example, epoxy group, hydroxyl group, carboxyl group, amino group, isocyanate group, silanol group, etc. A compound having a functional group having reactivity can be used.

(Embodiment 2)
Next, the manufacturing method of the restoration | repair concrete member of this invention is demonstrated. The method for producing a repaired concrete member according to the present invention is a method for manufacturing a repaired concrete member using the above-described concrete self-healing adhesive sheet according to the present invention. Bonding the concrete self-healing adhesive sheet, heating the concrete self-healing adhesive sheet to melt the adhesive layer of the concrete self-healing adhesive sheet, and repairing the molten adhesive And a step of cooling the molten adhesive and fixing it as a restoration concrete member to the restoration portion.

  According to the method for producing a repaired concrete member of the present invention, a repaired concrete member can be produced by a simple method, and the concrete can be repaired by a simple method.

  Then, the manufacturing method of the restoration | repair concrete member of this invention is demonstrated based on drawing. First, as shown in FIG. 3, the adhesive layer 12 side of the concrete self-healing adhesive sheet 10 of the present invention is bonded onto the repaired portion (break) 15 of the concrete 14. At this time, the concrete self-healing adhesive sheet 10 may be pressurized from the base material 11 side.

  Next, as shown in FIG. 4, the bonded concrete self-healing adhesive sheet 10 is heated using a dryer 16 to melt the adhesive layer 12 to obtain a molten adhesive. Next, as shown in FIG. 5, the molten adhesive is infiltrated into the repair portion (crack) 15.

  Next, as shown in FIG. 6, the base material 11 is peeled off, and the molten adhesive is cooled and fixed to the repair portion 15 as a repair concrete member. In the above cooling, it may be forcibly cooled or naturally cooled.

  Through the above steps, a repaired concrete member can be produced by a simple method, and the concrete can be repaired by a simple method.

  In the above process, the example using the concrete self-healing adhesive sheet 10 shown in FIG. 1 is shown. However, when the concrete self-healing adhesive sheet 20 shown in FIG. After peeling any of the above, the adhesive layer 12 side of the concrete self-healing adhesive sheet 20 is bonded to the concrete, and thereafter, the steps shown in FIGS. 4 to 6 may be performed in the same manner.

  EXAMPLES Hereinafter, although this invention is demonstrated in detail based on an Example, this invention is not limited to a following example. In addition, “parts” in the examples indicate “parts by mass”.

Example 1
First, the materials shown below were mixed to prepare an adhesive layer forming coating material.
(1) Hot-melt adhesive (polyester resin “SP185” manufactured by Nippon Synthetic Chemical Co., Ltd.): 85 parts Acid salt): 15 parts (3) Diluting solvent: Toluene: 85 parts (4) Solvent: methyl ethyl ketone: 25 parts

  Next, a PET film (thickness: 50 μm) in which a release layer (material: silicone layer) is formed on one side as a substrate is prepared, and the adhesive layer-forming coating material is dried on the release layer side of the substrate. It was applied with a bar coater so that the thickness of the coating film became 75 μm, and dried at 100 ° C. for 3 minutes to form an adhesive layer. Thereafter, the release layer side of the same PET film as described above was further bonded onto the adhesive layer to prepare a concrete self-healing adhesive sheet (hereinafter simply referred to as an adhesive sheet).

  It was 500 mPa * s (melting temperature 180 degreeC) when the melt viscosity of the contact bonding layer of the produced adhesive sheet was measured by the melt viscosity test method based on A method prescribed | regulated to JISK6862.

(Example 2)
An adhesive sheet was produced in the same manner as in Example 1 except that the content of the hot melt adhesive was changed to 93 parts and the content of the concrete self-healing material was changed to 7 parts. When the melt viscosity of the adhesive layer of the produced adhesive sheet was measured in the same manner as in Example 1, it was 150 mPa · s (melting temperature 180 ° C.).

(Example 3)
An adhesive sheet was produced in the same manner as in Example 1 except that the content of the hot melt adhesive was changed to 75 parts and the content of the concrete self-healing material was changed to 25 parts. When the melt viscosity of the adhesive layer of the produced adhesive sheet was measured in the same manner as in Example 1, it was 1800 mPa · s (melting temperature 180 ° C.).

(Comparative Example 1)
First, the materials shown below were mixed to prepare a paint for forming an adhesive layer that does not contain a concrete self-healing material.
(1) Hot melt adhesive (polyester resin “SP185” manufactured by Nippon Synthetic Chemical Co., Ltd.): 100 parts (2) Diluting solvent: Toluene: 85 parts (3) Solvent: Methyl ethyl ketone: 25 parts

  Next, an adhesive sheet was prepared in the same manner as in Example 1 except that the adhesive layer forming coating material was used. When the melt viscosity of the adhesive layer of the produced adhesive sheet was measured in the same manner as in Example 1, it was 100 mPa · s (melting temperature 180 ° C.).

(Comparative Example 2)
An adhesive sheet was produced in the same manner as in Example 1 except that the content of the hot melt adhesive was changed to 60 parts and the content of the concrete self-healing material was changed to 40 parts. When the melt viscosity of the adhesive layer of the produced adhesive sheet was measured in the same manner as in Example 1, it was 2500 mPa · s (melting temperature 180 ° C.).

  Next, the waterproofness and appearance of the adhesive sheets prepared in Examples 1 to 3 and Comparative Examples 1 and 2 were evaluated as follows.

  First, concrete having a size of 100 mm in length, 200 mm in width, and 10 mm in height was produced in accordance with the concrete making method defined in JIS 1138A. Next, a through hole having a diameter of 2 mm was formed in the center of the concrete. The base material on one side of the produced adhesive sheet is peeled off from the upper surface of the through hole, the adhesive layer side of the adhesive sheet is pressure-bonded to the through hole, and heated from the base material side of the adhesive sheet with a dryer for 2 minutes. It was melted and permeated into the through hole. Then, the remaining base material was peeled off, the concrete was stored at room temperature, and a concrete restoration part was formed.

Next, 5 cm ³ of water was sprayed on the upper part of the concrete restoration part in order to evaluate the water-stopping property. The water-stopping evaluation was made by visually observing whether the water had penetrated to the lower part of the concrete restoration part (the back side of the concrete). As a result, the case where water permeation was not recognized at all was evaluated as A, and the case where water permeation could be confirmed was evaluated as B.

  Moreover, in order to evaluate external appearance property, the color of the said concrete restoration part was observed visually. As a result, the case where the concrete restoration part assimilated with the surrounding original concrete and almost no color change was evaluated as A, and the concrete restoration part was not assimilated with the surrounding original concrete, Evaluation B was given when the change was clearly recognized.

  The results of the evaluation are shown in Table 1. In Table 1, the adhesive layer materials used in Examples 1 to 3 and Comparative Examples 1 and 2 and their contents (content of each component / content of concrete self-healing material relative to 100 parts of hot melt adhesive) Also shown.

  From Table 1, it can be seen that the restoration concrete using the adhesive sheet of the present invention is excellent in water-stopping and appearance. On the other hand, the appearance of the restored concrete of Comparative Example 1 using an adhesive sheet that does not contain a concrete self-healing material was poor. This is because the original concrete and the resin part were not assimilated because the concrete restoration part was composed only of the resin material. In addition, the water-proof property was inferior in the repaired concrete of Comparative Example 2 using an adhesive sheet in which the melt viscosity of the adhesive layer exceeded 2000 mPa · s. This is presumably because the melt adhesive did not sufficiently permeate the concrete through-holes because the melt viscosity of the adhesive layer was high.

  The adhesive sheet of the present invention can repair concrete by a simple method and can be widely used as an adhesive sheet excellent in handleability, and is particularly useful in the field of civil engineering and construction.

10, 20 Concrete self-healing adhesive sheet 11, 13 Base material 12 Adhesive layer 14 Concrete 15 Restoration part (crack)
16 Hair dryer

Claims (11)

A concrete self-healing adhesive sheet comprising a substrate and an adhesive layer formed on at least one main surface of the substrate,
The adhesive layer includes a hot melt adhesive and a concrete self-healing material,
A concrete self-healing adhesive sheet, wherein the adhesive layer has a melt viscosity of 2000 mPa · s or less as measured by a melt viscosity test method based on Method A specified in JIS K 6862.   The concrete self-healing adhesive sheet according to claim 1, wherein the concrete self-healing material is an oxide containing any one element selected from the group consisting of Ca, Mg, Al, Si and Fe.   The concrete self-healing adhesive sheet according to claim 1, wherein the hot melt adhesive is made of a polyester hot melt resin.   The concrete self-healing adhesive according to any one of claims 1 to 3, wherein a content of the concrete self-healing material is 7 parts by mass or more and 34 parts by mass or less with respect to 100 parts by mass of the hot melt adhesive. Sheet.   The concrete self-healing adhesive sheet according to any one of claims 1 to 4, wherein the adhesive layer has a thickness of 25 µm or more and 1000 µm or less. Producing a paint for forming an adhesive layer comprising a hot-melt adhesive, a concrete self-healing material, and a solvent;
Applying the coating material for forming an adhesive layer to at least one main surface of a substrate to form an adhesive layer precursor layer on the substrate;
And removing the solvent from the adhesive layer precursor layer to form an adhesive layer on the substrate.   The method for producing a concrete self-healing adhesive sheet according to claim 6, wherein the concrete self-healing material is an oxide containing any one element selected from the group consisting of Ca, Mg, Al, Si and Fe. .   The said hot-melt-adhesive is a manufacturing method of the concrete self-repairing adhesive sheet of Claim 6 or 7 which consists of polyester type hot-melt resin.   The content of the concrete self-healing material in the adhesive layer forming paint is 7 parts by mass or more and 34 parts by mass or less with respect to 100 parts by mass of the hot melt adhesive. The manufacturing method of the concrete self-recoverable adhesive sheet of description.   The method for producing a concrete self-healing adhesive sheet according to any one of claims 6 to 9, wherein the adhesive layer forming coating further contains a crosslinking agent. A method for producing a repaired concrete member using a concrete self-healing adhesive sheet,
Bonding the concrete self-healing adhesive sheet according to any one of claims 1 to 5 to a concrete restoration part;
Heating the bonded self-healing adhesive sheet, and melting the adhesive layer of the concrete self-healing adhesive sheet into a molten adhesive;
Infiltrating the repair part with the molten adhesive;
And a step of cooling the molten adhesive and fixing it as a restoration concrete member to the restoration part.

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