TW202417719A - Repairing method of structure and repairing structure capable of draining water content within structure and have advantages of stability and uniformity that can improve quality - Google Patents

Abstract

A structure repairing method capable of easily repairing a surface of a structure is provided and can be maintained for a long time. A structure repairing method for pasting a repair piece onto a surface of a structure is characterized in that: the repair piece includes: a polymer cementing agent hardened layer provided on the surface side of the structure; and a resin layer provided on the polymer cementing agent hardened layer.

Description

Methods for repairing structures and structures for repairing structures

The present invention relates to a method for repairing the roof of a structure such as a house or a building. More specifically, it relates to a method for repairing the roof of a repair sheet that has very high durability and can maintain a repaired state for a long time.

The roofs of structures such as general residences and commercial buildings include concrete roofs called slate roofs, metal roofs, galvanized steel plate (registered trademark) roofs, and non-tilted roofs. However, when they are deteriorated due to long-term exposure to wind and rain, or damaged due to disasters such as typhoons, they sometimes become the cause of leaks. After the deterioration and damage of the roof of a structure, there are emergency measures, but as an emergency measure for the roof of a current structure, there is generally a method such as placing a woven waterproof sheet 31 to cover the damaged part of the roof 30, and placing a plurality of sandbags 32 as counterweights on the woven waterproof sheet 31 as shown in FIG. 4. In addition to the method of using a counterweight such as a sandbag 32 to arrange the woven waterproof cloth 31, there are proposals such as in Patent Document 1 and Patent Document 2, which use a bag filled with water to fix the woven waterproof cloth. [Prior Technical Document] [Patent Document]

[Patent document 1] Japan Practical New Application Registration No. 3225057 [Patent document 2] Japan Practical New Application Registration No. 3116572

[The problem the invention is trying to solve]

However, in the previous roof repair using the woven waterproof sheet 31, it is difficult to prevent the wrinkles of the woven waterproof sheet 31. Also, the surface of the roof is usually uneven, so there is a gap between the woven waterproof sheet 31 and the roof, and there is a problem that water cannot be prevented from entering the gap. In addition, the weather resistance of the woven waterproof sheet is usually not very good, so it deteriorates in about a year and must be replaced.

The present invention was developed in view of the previous situation, and its purpose is to provide a method for repairing the roof that can easily repair the surface of the roof of a structure and can be maintained for a long time. [Means for solving the problem]

The inventors of the present invention have carefully examined the method for repairing the surface of the roof of a structure, and as a result, have realized a method of pasting a repair sheet on the surface of the roof of a structure instead of a woven waterproof cloth, thereby eliminating the gap between the roof and the repair sheet, and imparting properties corresponding to the characteristics of the roof to the repair sheet. Specifically, it also includes the ability to track cracks and expansion generated in a slate roof, etc., waterproofness that prevents deterioration factors such as water and chlorine ions from penetrating, salt shielding, neutralization prevention, and water vapor permeability that can discharge moisture in the roof as water vapor, etc., and at the same time, a layer that supports the strength of the repair sheet itself is provided to complete the present invention. Moreover, this technical concept can be applied as a repair method using repair sheets to components other than the roof of the structure, such as the walls, eaves, fences, doorposts, gates, door roofs, etc. of the structure.

The roof repair method of the present invention is a roof repair method that adheres a repair sheet to the surface of the structure roof, wherein the repair sheet includes: a polymer adhesive hardening layer, which is arranged on the surface side of the structure roof; and a resin layer, which is arranged on the polymer adhesive hardening layer.

When this invention is used, the repair sheet consisting of only a layer that does not include a base material, a reinforcing member, etc. is used, so it can be easily adhered to the repaired part of the roof of the structure. As a result, there can be no gap between the roof and the repair sheet, and the repair can be easily performed like a formal repair in the same period of time as the operation of placing a woven waterproof sheet. Specifically, in the roof repair method of the present invention, first, after washing the repaired part with water or the like, an adhesive or a primer with an adhesive function is applied to the repaired part with a roller or the like, and the repair sheet is cut into appropriate sizes to be adhered to the repaired part in sequence, and the repair is completed only in this way. The repair sheet used in the present invention can be pasted in a wet environment, so it does not require a drying process and can be constructed in a short time. In addition, the repair sheet includes a polymer adhesive hardening layer and a resin layer disposed on the polymer hardening layer, so it can prevent rain leakage for a long time and protect the roof of the structure for a long time. Moreover, the above-mentioned repair sheet, the polymer adhesive hardening layer disposed on the roof side of the structure, has excellent adhesion to the roof, and can give the resin layer disposed on the polymer adhesive hardening layer excellent properties such as waterproofing, salt shielding, and neutralization prevention. Furthermore, the above-mentioned repair sheet can be mass-produced through the painting process and drying process of the factory production line. Therefore, when according to the present invention, it is possible to achieve low cost, a significant reduction in the on-site operation time, and long-term protection of the roof of the structure. In addition, the roof repair done by the repair sheet of the present invention is essentially different from the previous method of configuring a woven waterproof cloth as a temporary method of weathering the wind and rain. Compared with the past, it can obtain a long-term durable repair through a very simple operation. The reason is that the repair sheet of the present invention has excellent water resistance and salt blocking properties, so it can protect the roofing material from being invaded by substances that damage the roofing material. In addition, it has moderate water vapor permeability. However, this water vapor permeability allows the excess water contained in the roofing material to be released to the outside, which can prevent corrosion or inhibit rust.

In the roof repair method of the present invention, the polymer adhesive hardening layer may be a layer containing an adhesive component and a resin, and the resin contains 10% by weight or more and 40% by weight or less. Preferably, the resin contains 20% by weight or more and 30% by weight or less.

According to the invention, by controlling the ratio of the adhesive component to the resin component, it is easier to form a polymer adhesive hardening layer, and the polymer adhesive hardening layer is easy to become a layer with good tracking and good compatibility, so there is a tendency to improve the adhesion of the layer itself. In addition, the adhesive component contained in the polymer adhesive hardening layer on the roof side of the structure acts to improve the adhesion with the roof.

In the roof repair method of the present invention, it is desirable to bond the repair sheets together after applying an adhesive to the surface of the roof of the structure.

According to this invention, the repair sheet consisting of only a layer without a base material, a reinforcing member, etc. is used, so it can be easily adhered to the surface of the roof of the structure. As a result, even if the worker is not a skilled worker, the repair sheet with excellent strength can be stably installed on the surface of the roof of the structure, which can greatly reduce the construction period and protect the roof of the structure for a long time.

In the roof repair method of the present invention, a primer layer may be provided between the roof of the structure and the adhesive.

When this invention is used, the base coating layer between the roof of the structure and the adhesive can enhance the adhesion between them, so the roof of the structure can be stably protected for a long time by the repair sheet. [Effect of the invention]

According to the present invention, a method for repairing a roof can be provided that uses a repair sheet that can easily repair the surface of a structure roof and can maintain the repair sheet for a long time. In particular, a method for repairing a roof can be provided that gives a repair sheet a performance corresponding to the characteristics of the structure roof, and uses a repair sheet that can track cracks and expansions generated in the roof, and that prevents deterioration factors such as water and chlorine ions from penetrating into the structure roof, and has permeability that can discharge moisture and deterioration factors in the structure roof, and improves strength. Moreover, at the construction site, the method of using a paint for repairing leaks to apply multiple layers by hand has the advantage of improving the stability and uniformity of quality.

[Form used to implement the invention]

The roof repair method of the present invention is described below with reference to the drawings. Moreover, the present invention can be modified in various ways as long as it has the technical characteristics, and is not limited to the following description and the form of the drawings.

The present invention is a method for repairing a roof by pasting a repair sheet to the surface of the roof of a structure (hereinafter, also referred to as the repair method of the present invention). That is, FIG. 1 is an explanatory diagram of the method for repairing a roof of the present invention, but, as shown in FIG. 1 , in the present invention, it has a process of pasting a repair sheet 1 to the surface of a roof 10. As a method for pasting a repair sheet 1 to the surface of a roof 10, as shown in FIG. 1 , it can be pasted to a part of the surface of the roof 10 or to the entire surface of the roof 10, and it can be appropriately determined according to the size of the part that needs to be repaired. The following describes each structural element.

[Roof] The structure having the roof in the repair method of the present invention is not particularly limited, and examples thereof include ordinary houses, large structures such as gymnasiums, hospitals, and public facilities. The shape of the roof of the above-mentioned structure is also not particularly limited, and examples thereof include any shape such as a triangle (gable roof), a hip roof, a square, a non-sloping roof, a unilaterally sloping roof, an unequal triangle roof, and a semicircular roof. In addition, as the roof of the above-mentioned structure, specifically, there can be cited, for example, a slate roof, a galvanized steel plate (registered trademark) roof, a galvanized iron roof (galvanized steel plate roof), a metal roof with paint applied to the iron, and a concrete roof called a non-sloping roof. In addition, the so-called slate has a structure in which an inorganic paint is applied on an inorganic makeup (binder) layer provided on a binder layer through an inorganic colored stone layer. It has a simple appearance and rich colors, is lightweight and inexpensive, and is therefore widely used as a roof material for general houses. However, compared with roofs made of galvanized steel plates (registered trademark), slate roofs are more prone to cracking, and their durability and waterproofness are lower than those of roofs made of other materials, and they are more prone to damage, etc. Therefore, they are particularly suitable for the roof repair method of the present invention. In the following description, the roof of the structure is also referred to as "slate roof, etc." The surface of the roof of the above-mentioned structure can be flat or have a degree of unevenness similar to that of a general slate roof, etc. Among them, the repair method of the present invention uses a repair sheet of a specific structure to repair the roof of the structure, so that the roof of the structure, even if it is a slate roof with uneven surfaces, will not form gaps. In addition, the repair sheet is applied to the roof of the structure, thereby having the special advantages of being able to track cracks and expansion generated in the roof of the structure, preventing deterioration factors such as water and chlorine ions from penetrating into the roof of the structure, and allowing the moisture in the roof of the structure to be discharged as water vapor. In particular, in the case of slate roofs and non-tilted roofs, which are materials that easily accumulate rainwater, the ability to discharge water vapor has a greater effect on preventing material deterioration.

[Repairing sheet] As shown in FIG. 2 , the repairing sheet 1 used in the present invention includes: a polymer adhesive hardening layer 2, which is disposed on the roof of the structure; and a resin layer 3, which is disposed on the polymer adhesive hardening layer 2. The polymer adhesive hardening layer 2 and the resin layer 3 can also be formed as a single layer or as a laminate. In addition, as a required performance, other layers can also be disposed between the polymer adhesive hardening layer 2 and the resin layer 3.

The repair sheet 1 used in the present invention can be in a single sheet shape as shown in FIG1 or in a roller shape. When it is in a roller shape as shown in FIG1, it is pulled out to a necessary length to be cut, thereby pasting the repair sheet 1 of the necessary size to the necessary part to be repaired. Moreover, the size of the repair sheet 1 is not particularly limited, and it can be appropriately adjusted to a size that can replace the previous woven waterproof cloth.

The thickness distribution of the repair sheet 1 used in the present invention is preferably within ±100μm. The thickness distribution of this repair sheet 1 is within the above range, so that even unskilled workers can stably set a layer with a smaller thickness difference to the surface of the roof of the structure. In addition, by controlling the thickness distribution within the above range, it is easier to uniformly reinforce the roof of the structure. The polymer adhesive hardening layer 2 provided on the roof side of the structure has excellent adhesion to the roof of the structure, and the resin layer 3 provided on the polymer adhesive hardening layer 2 can be given properties such as waterproofing, salt shielding, and neutralization prevention. Furthermore, the repair sheet 1 can be mass-produced through the painting process and drying process of the factory production line, so it can achieve low cost, greatly reduce the work time on site, and protect the roof of the structure for a long time. As a result, the work time when adhering to the surface of the roof of the structure can be greatly reduced, and the roof of the structure can be protected for a long time.

The following is a detailed description of specific examples of each structural element of the repair sheet 1. (Polymer adhesive hardening layer) The polymer adhesive hardening layer 2 is a layer disposed on the roof side of the structure. This polymer adhesive hardening layer 2, for example, as shown in FIG. 2 (A), can also be a single layer that is not applied in an overlapping manner, or, as shown in FIG. 2 (B), it can also be a layer after overlapping application. As a single layer or a laminate, it can be set arbitrarily in consideration of the overall thickness, the functions to be assigned (trackability, adhesion to the roof of the structure, etc.), the factory's manufacturing line, and production costs. For example, when the manufacturing line is short and the single layer does not reach a predetermined thickness, it can be formed by overlapping two or more layers. Moreover, for example, when two layers are overlapped and applied, the second layer is formed after the first layer is dried. In addition, the polymer binder hardening layer 2 can also be composed of layers with different properties. For example, as a layer with a higher proportion of resin components on the 3rd side of the resin layer, the layer with a higher resin component is bonded to the resin layer, and the layer with a higher adhesive component is bonded to the telegraph pole, making the bonding property to both of them very good.

The polymer adhesive hardening layer 2 is obtained by painting a resin containing an adhesive component (resin component) into a coating. As the above-mentioned adhesive component, various adhesives, limestone containing components composed of calcium oxide, clay containing silicon dioxide, etc. can be cited. Among them, the adhesive is preferably Portland adhesive, alumina adhesive, quick-hardening adhesive, and fly ash adhesive. Which arbitrary adhesive is selected is selected according to the characteristics that the polymer adhesive hardening layer 2 must include, for example, considering the degree of tracking of the electric pole. In particular, the preferred Portland adhesive specified in JIS R5210 can be cited.

Examples of the resin component include acrylic resin, acrylic urethane resin, acrylic silicone resin, fluororesin, soft epoxy resin, polybutadiene rubber, and acrylic resin having rubber properties (e.g., synthetic rubber having acrylate as a main component). Such a resin component is the same as the resin component constituting the resin layer 3 described later, but is preferred from the viewpoint of improving the adhesion between the polymer binder curing layer 2 and the resin layer 3.

The content of the resin component is appropriately adjusted according to the material used, but it is preferably 10% by weight or more and 40% by weight or less relative to the total of the adhesive component and the resin component. When it is less than 10% by weight, the adhesion to the resin layer is reduced, or it is difficult to maintain the polymer adhesive hardening layer as a layer. When it exceeds 40% by weight, the adhesion to the roof of the structure sometimes becomes insufficient. From the above viewpoints, the optimal range of the content of the resin component is 10% by weight or more and 40% by weight or less, but 20% by weight or more and 30% by weight or less is more preferred.

The coating used to form the polymer binder hardening layer 2 is a paint liquid obtained by mixing the binder component and the resin component with a solvent. For the resin component, it is preferably an emulsion. For example, an acrylic emulsion is a polymer microparticle obtained by emulsifying and polymerizing monomers such as acrylates using an emulsifier. As an example, it is preferably an acrylic polymer emulsion composed of monomers or monomer mixtures containing one or more of acrylates and methacrylates and water mixed with a surfactant. The content of acrylates, etc. constituting the above-mentioned acrylic emulsion is not particularly limited, but is selected from the range of 20 to 100% by mass. In addition, the amount of surfactant to be mixed is not particularly limited, but the amount of surfactant to be mixed is sufficient to form an emulsion.

The polymer binder hardening layer 2 is formed by applying the paint liquid to the release board and then drying to remove the solvent (preferably water). For example, a mixed composition of a binder component and an acrylic emulsion is used as the paint liquid to form the polymer binder hardening layer 2. Moreover, the resin layer 3 may be formed on the release board after the polymer binder hardening layer 2 is formed, or the polymer binder hardening layer 2 may be formed after the resin layer 3 is formed on the release board.

The thickness of the polymer adhesive hardening layer 2 is not particularly limited, but can be arbitrarily set by the state (damage state) and shape of the roof of the structure. As a specific thickness of the polymer adhesive hardening layer, it can be within the range of 0.5mm to 1.5mm. As an example, when the thickness is 1mm, the thickness variation is preferably within ±100μm. Such a precise thickness cannot be achieved in on-site painting, but can be achieved by stable painting on the factory's manufacturing line. Moreover, when it is thicker than 1mm, the thickness variation can be within ±100μm. In addition, when it is thinner than 1mm, the thickness variation can be smaller.

The polymer adhesive hardening layer 2 has an adhesive component, and water vapor is more easily permeable than the resin layer 3 described later. The best water vapor permeability of the polymer adhesive hardening layer 2 is, for example, about 20 to 60 g/m ² ･day. Moreover, the adhesive component has good compatibility with adhesive components constituting concrete, and can be made to have excellent adhesion to the roof surface of the structure. Moreover, as shown in FIG. 3, when a primer layer 22 and an adhesive 23 are sequentially provided on the surface of the roof 21, the polymer adhesive hardening layer 2 containing the adhesive component also adheres to the adhesive 23 with good adhesion. Furthermore, since the polymer binder hardening layer 2 has elongation, even when cracks or expansion occur in the roof 21, changes in the roof of the structure can be tracked.

(Resin layer) As shown in FIG3 (C), the resin layer 3 is a layer that is arranged on the opposite side of the roof 21 and appears on the surface. This resin layer 3, for example, as shown in FIG2 (A), can also be a single layer, as shown in FIG2 (B), it can also be a laminate composed of at least two layers. As a single layer or a laminate, it is set in consideration of the overall thickness, the function to be imparted (waterproofness, salt shielding, neutralization barrier, water vapor permeability, etc.), the length of the factory's manufacturing line, and the production cost. For example, when the manufacturing line is short and the single layer does not reach a predetermined thickness, it can be formed by overlapping two or more layers. Furthermore, the coating is applied in layers, and the second layer is applied after the first layer is dried. The second layer is then dried.

The resin layer 3 is soft and can be painted to trace cracks and crazing on the roof surface of the structure. At the same time, it can form a resin layer coating with excellent waterproofness, salt shielding, neutralization resistance and water vapor permeability. As the resin constituting the resin layer 3, acrylic resins (such as synthetic rubber with acrylate as the main component), acrylic polyurethane resins, acrylic silicone resins, fluororesins, soft epoxy resins, and polybutadiene rubbers with rubber properties can be cited. This resin material is preferably the same as the resin component constituting the polymer binder curing layer 2. In particular, a resin containing an elastic film-forming component such as rubber is preferred.

Among them, acrylic resins showing rubber properties are preferably composed of aqueous emulsions of acrylic rubber copolymers in terms of safety and paintability. The proportion of the acrylic rubber copolymer in the emulsion is, for example, 30 to 70% by mass. The acrylic rubber copolymer emulsion is obtained, for example, by emulsifying a polymerized monomer in the presence of a surfactant. The surfactant may be an anionic, nonionic, or cationic surfactant.

The coating used to form the resin layer 3 is prepared by preparing a mixed brushing liquid of a resin composition and a solvent, applying the brushing liquid to the release board, and then drying to remove the solvent, thereby forming the resin layer 3. The solvent can also be water or an aqueous solvent, or an organic solvent such as xylene, mineral oil, etc. In the embodiment described below, an aqueous solvent is used to prepare the resin layer 3 with an acrylic rubber composition. Moreover, the order of the layers formed on the release board is not limited. For example, as described above, it can also be the order of the resin layer 3, the polymer binder hardening layer 2, or the order of the polymer binder hardening layer 2, and the resin layer 3. It is preferred to form the resin layer 3 onto the release sheet and thereafter form the polymer binder hardening layer 2.

The thickness of the resin layer 3 can be set arbitrarily according to the state (damage state) and shape of the roof 21. For example, the thickness is in the range of 50 to 150 μm, and the thickness varies, preferably within ±50 μm. Such a precise thickness cannot be achieved in on-site painting, but can be stably achieved in the factory's manufacturing line.

The resin layer 3 has high water resistance, salt shielding, and neutralization barrier properties, but it is best that water vapor can pass through it. As for the water vapor permeability of the resin layer 3, it is expected that, for example, the water vapor permeability of the repair sheet 1 is appropriately adjusted to be 10 to 50 g/m ² ･day. Thereby, the repair sheet 1 can have high water resistance, salt shielding, neutralization barrier properties and a predetermined water vapor permeability. Moreover, by being composed of the same resin component as the polymer binder curing layer 2, it can be made to have very good compatibility with the polymer binder curing layer 2 and very good adhesion. The water vapor permeability is measured in compliance with JIS Z0208 "Test method for moisture permeability of moisture-proof packaging materials".

Furthermore, the resin layer 3 may contain a pigment from the viewpoint of making the color change of the repair sheet 1 used in the present invention richer. Furthermore, the resin layer 3 may contain an inorganic substance. By containing an inorganic substance, abrasion resistance can be imparted to the resin layer 3. As the above-mentioned inorganic substance, it is not particularly limited, and examples thereof include previously known materials such as metal oxide particles such as silicon dioxide, aluminum oxide, and titanium dioxide. Furthermore, the resin layer 3 may also contain a well-known antifouling agent. The repair sheet used in the present invention is used for repairing the roof of a structure usually installed outdoors, so the resin layer 3 is often contaminated, but by containing an antifouling agent, the repair sheet can be well prevented from being contaminated. Furthermore, the resin layer 3 may also contain additives that can impart various functions. Examples of such additives include cellulose nanofibers, etc.

(Other structures) The repair sheet 1 to be manufactured may also include a release board on the surface of one of the polymer binder hardening layer 2 and the resin layer 3. The release board can protect the surface of the repair sheet 1 when it is transferred to the construction site. At the construction site, the repair sheet 1 with the release board is adhered to the roof 21 of the object (or through the base coating 22 or the adhesive 23), and then the release board is peeled off, thereby greatly improving the processability at the construction site. In addition, the release board can also be a process paper used in the production process of the repair sheet 1, and a protective film such as polyethylene terephthalate film can also be adhered.

The process paper used as the release sheet is not particularly limited in terms of material, etc., as long as it is previously known in the manufacturing process. For example, it is preferably a laminated paper having an olefin resin layer such as polypropylene, polyethylene, etc., a layer containing silicon, etc., like the known process paper. The thickness is not particularly limited, but as long as it does not hinder the processing in manufacturing and construction, it can be any thickness of about 50 to 500 μm, for example.

The repair sheet 1 described above can protect the roof 21 for a long time. In particular, the repair sheet 1 can be given performance corresponding to the characteristics of the roof 21, and the cracks and expansion generated in the roof 21 can be tracked, so that deterioration factors such as water and chlorine ions do not penetrate into the roof 21, and the repair sheet 1 has permeability that can discharge moisture and deterioration factors in the roof 21. Moreover, such a repair sheet 1 can be manufactured in a factory, so high-quality products with stable characteristics can be mass-produced. As a result, construction can be carried out without relying on the skills of technicians, and the construction period can be shortened and the labor cost can be reduced. Moreover, the surface of the resin layer 3 can be given design, so by sticking the repair sheet 1 to the roof 21, design can also be given. Furthermore, the above-mentioned method of imparting design is not particularly limited, and examples thereof include a method of providing a concave-convex shape by a well-known method, or a method of imparting design by printing.

The roof repair method of the present invention, as shown in FIG3, is to stick the repair sheet 1 to the surface of the roof 21. In the present invention, it is best to stick the repair sheet 1 to the surface of the roof of the structure after applying the adhesive 23 to the surface. This construction method can make it easier to stick the surface of the roof 21 to the repair sheet 1. As a result, even unskilled workers can install the repair sheet 1 composed of layers with smaller thickness differences on the roof 21, which can greatly reduce the construction period and protect the roof 21 for a long time.

FIG3 is an explanatory diagram of the method of pasting the repair sheet 1. As shown in FIG3 (A), it is best to form a primer layer 22 on the surface of the roof 21. The primer layer 22 can be formed by applying a paint liquid obtained by mixing a resin such as epoxy resin and a solvent to the roof 21, and then evaporating the solvent in the paint liquid to dry it. As a solvent at this time, water can be used as an example. The thickness of the primer layer 22 is not particularly limited, but can be, for example, in the range of 100 to 150 μm. The primer layer 22 provided between the roof 21 and the adhesive 23 serves to improve the adhesion between them, so the repair sheet 1 can stably protect the roof 21 for a long time. Furthermore, cracks and defects generated on the roof 21 are preferably repaired and then a base coating 22 is provided. The repair is not particularly limited, but adhesive mortar, epoxy resin, etc. are generally used.

After forming the base coating layer 22, as shown in FIG3 (B), it is best to apply an adhesive 23. It is best to adhere the repair sheet 1 thereon without drying the applied adhesive 23, as shown in FIG3 (C). As the adhesive 23, there can be exemplified urethane adhesives, epoxy resin adhesives, adhesives using acrylic resins showing rubber properties (for example, synthetic rubbers having acrylate as a main component), etc. Among them, the adhesive 23 composed of the same resin component as the resin component of the polymer adhesive curing layer 2 constituting the repair sheet 1 is good because the bonding strength with the polymer adhesive curing layer 2 becomes higher. The thickness of the adhesive 23 is not particularly limited. The adhesive 23 is usually applied by brushing or spraying, and then naturally dries and hardens over time. Moreover, by selecting the material of the above-mentioned adhesive, the base coating layer is not necessarily required, and the repair sheet can be pasted to the surface of the roof of the structure through only one layer of adhesive. Implementation Example

The present invention is more specifically described by way of embodiments and comparative examples.

(Manufacturing Example 1) A release sheet with a thickness of 130 μm composed of PP layer pressed paper was prepared, and a resin layer was formed on the release sheet by the following method. First, an emulsion composition containing 60 parts by mass of acrylic silicone resin, 25 parts by mass of titanium dioxide, 10 parts by mass of ferric oxide, and 5 parts by mass of carbon black was prepared. After applying the emulsion composition to the above release sheet, it was heated to harden it to form a resin layer. The thickness of the resin layer was 0.1 mm. Then, a polymer binder hardening layer was formed on the resin layer. Specifically, a binder mixture containing 45 parts by mass of water-based acrylic emulsion is prepared as a composition for forming a polymer binder curing layer. Here, the binder mixture contains at least 70±5 parts by mass of Portland binder, 10±5 parts by mass of silicon dioxide, 2±1 parts by mass of aluminum oxide, and 1 to 2 parts by mass of titanium oxide. The acrylic emulsion contains at least 53±2 parts by mass of acrylic polymer and 43±2 parts by mass of water after emulsification polymerization using an acrylate monomer as an emulsifier. The polymer adhesive curing layer forming composition obtained by drying and mixing these is applied to obtain a polymer adhesive curing layer, which is a composite layer containing 50 mass % of Portland adhesive in acrylic resin. The above polymer adhesive curing layer forming composition is applied to the resin layer and dried to form a polymer adhesive curing layer with a thickness of 1.29 mm composed of a single layer. In this way, a repair sheet with a total thickness of 1.39 mm, a width of 1 m, and a length of 3 m is produced.

[Measurement of strength] The strength of the repair sheet obtained in Manufacturing Example 1 was evaluated by measuring the breaking strength using a tensile tester (AGS-J, manufactured by Shimadzu Corporation). The strength of Manufacturing Example 1 was 1500N after measuring with a width of 50mm. [Measurement of thickness variation] For Manufacturing Example 1, the repair sheet wound into a roller shape was cut into an A4 size (200mm×300mm), and the thickness was measured at 14 locations in each part, and the thickness variation was calculated. In Manufacturing Example 1, the thickness variation was 26μm.

(Manufacturing Examples 2 to 4) In Manufacturing Example 1, the total thickness of the repair sheet was changed. In Manufacturing Example 2, a repair sheet with a total thickness of 0.76 mm after laminating a polymer adhesive hardening layer with a thickness of 0.66 mm and a resin layer with a thickness of 100 μm was prepared. In Manufacturing Example 3, a repair sheet with a total thickness of 1.06 mm after laminating a polymer adhesive hardening layer with a thickness of 0.96 mm and a resin layer with a thickness of 100 μm was prepared. In Manufacturing Example 4, a repair sheet with a total thickness of 1.57 mm after laminating a polymer adhesive hardening layer with a thickness of 1.47 mm and a resin layer with a thickness of 100 μm was prepared. Other than that, it is the same as Manufacturing Example 1.

[Strength and Water Vapor Permeability] For Manufacturing Examples 2 to 4, the strength and water vapor permeability of the repair sheet were measured. Strength was evaluated by measuring the breaking strength using a tensile tester (AGS-J, manufactured by Shimadzu Corporation). Water vapor permeability (WVTR), also known as "moisture permeability", is the amount of water vapor that passes through ^1m2 of film (repair sheet) in 24 hours, expressed in grams, and expressed in g/ ^m2 ･day or g/ml/day. It is used as an indicator of water vapor barrier properties. It was measured in accordance with JIS Z0208 (B) method.

The measurement results of the 50mm width show that in manufacturing example 2, the strength is 1200N and the water vapor transmission rate is 18.2g/m ² ･day. In manufacturing example 3, the strength is 1500N and the water vapor transmission rate is 13.0g/m ² ･day. In manufacturing example 4, the strength is 1600N and the water vapor transmission rate is 10.2g/m ² ･day. At any thickness, there is no problem with the strength and water vapor transmission rate and it can be used.

(Example 1) For a 15-year-old single-family house with a slate roof, the roof was repaired using the repair sheet of the present invention in the following method. First, the leaking condition was observed from inside and outside the house, and a portion of the slate roof that was considered to be the cause was specified. An approximately square area of 15 square meters was completely covered and the repair sheet produced in Example 1 was added. Moreover, almost all of the area was occupied by slate, but a portion of it also had a metal roofing part called a ridge of the roof. When adding the repair sheet, P300 (trade name) manufactured by Toa Gosei Chemical Co., Ltd. was used as an epoxy resin adhesive for the slate roof, and SEMEDAIN PM165-RX (trade name) manufactured by SEMEDAIN Co., Ltd. was used as a metal adhesive for the metal ridge. After applying the adhesive to each part of the roof and ridge, the surface was evened by a hand press used to seal and press the repair sheet. The repair sheet applied in this way was fixed to the roof material a few hours after the construction, and the adhesive was completely hardened in about two weeks. After complete hardening, it was visually confirmed that there was no positional deviation since the construction. For this object, after three months from the start of construction, after confirmation with the residents, it no longer leaks even if it rains, and it is confirmed that the repair method of the present invention is effective in preventing leaks. In addition, when visually confirmed by the inventors of the present invention, it is also confirmed that there is no deviation from the construction position, no peeling or floating from the roof, and the repair is durable. Moreover, it can be confirmed that the same effect is achieved after using the protective plates of manufacturing examples 2 to 4 with a changed total thickness.

1: Repair sheet 2: Polymer binder hardening layer 3: Resin layer 10,21,30: Roof 22: Base coating layer 23: Adhesive 31: Woven waterproof cloth 32: Sandbag

FIG. 1 is an explanatory diagram of the roof repair method of the present invention. FIG. 2 (A) and (B) are cross-sectional structural diagrams showing an example of a repair sheet used in the present invention. FIG. 3 (A) to (C) are explanatory diagrams of the roof repair method of the present invention. FIG. 4 is an explanatory diagram of a previous roof repair method.

1: Repair piece

10: Roof

Claims (7)

A method for repairing a structure, wherein a repair sheet is pasted onto the surface of the structure, wherein: the repair sheet comprises: a polymer adhesive hardening layer disposed on the surface side of the structure; and a resin layer disposed on the polymer adhesive hardening layer. A method for repairing a structure as claimed in claim 1, wherein the polymer adhesive hardening layer is a layer containing an adhesive component and a resin, and the resin contains more than 10 weight % and less than 40 weight %. A method for repairing a structure as claimed in claim 1 or 2, wherein after applying an adhesive to the surface of the structure, the adhesive is bonded to the repair sheet. A method for repairing a structure as claimed in claim 3, wherein a base coating layer is provided between the surface of the structure and the adhesive. A method for repairing a structure as claimed in any one of claims 1 to 4, wherein the repair sheet is adhered to the surface of a wall, eaves, fence, doorpost, gate, or door roof of the structure. A repair structure for a structure, comprising: a structure; an adhesive layer located on the structure; a polymer adhesive hardening layer located on the adhesive layer; and a resin layer located on the polymer adhesive hardening layer. The repair structure of the structure as claimed in claim 6 further includes a base coating layer located between the structure and the adhesive layer.