TW202340584A - Roof repair method which provides a sheet composed of a polymer cement hardened layer and a resin layer - Google Patents

Abstract

Provided is a roof repair method, which can easily repair a roof surface of a structure and can be maintained for a long time. A method for repairing a roof, which attaches a repair sheet to the roof surface of the structure and is characterized in that: the repair sheet includes: a polymer cement hardened layer, which is provided on the roof surface side of the structure; and a resin layer, which is provided on the polymer cement hardened layer. The polymer cement hardened layer contains a layer composed of cement and resin, and the resin contains more than 10% by weight and less than 40% by weight.

Description

Roof Repair Methods

The present invention relates to a method for repairing roofs of structures such as houses and buildings. More specifically, it relates to a method of repairing a roof using repair pieces that have very high durability and can maintain repair status for a long period of time.

Roofs of structures such as general residences and commercial buildings are known to include slate roofs, metal roofs, galvanized steel sheet (registered trademark) roofs, and concrete roofs without sloped roofs. However, when Deterioration caused by long-term exposure to wind and rain or damage caused by disasters such as typhoons may cause leakage. After the deterioration or damage of the roof of the structure occurs, although there is an emergency place, as an emergency response to the roof of the current structure, for example, as shown in Figure 4, a woven tarpaulin 31 is placed to cover the damaged area of the roof 30. A method of placing a plurality of sandbags 32 as counterweights on the woven tarpaulin 31. In addition, 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 a method of fixing the woven waterproof cloth using a bag filled with water, such as Patent Document 1 and Patent Document 2. [Advanced technical documents] [Patent Document]

[Patent Document 1] Japanese Utility Model Registration No. 3225057 [Patent Document 2] Japanese Utility Model Registration No. 3116572

[Problem to be solved by the invention]

However, in the previous repair of the roof using the woven tarpaulin 31, it was difficult to prevent the wrinkles of the woven tarpaulin 31. Moreover, the surface of the roof is usually uneven, so there is a gap between the woven tarpaulin 31 and the roof. gap, and there is a problem of being unable to prevent water from intruding into this gap. Also, generally, the weather resistance of woven tarpaulins is not very good, so they will deteriorate in about a year and must be replaced.

The present invention was developed in view of the current situation, and its purpose is to provide a roof repair method that can repair the surface of a structural roof relatively easily and can be maintained for a long period of time. [Means used to solve problems]

The inventors of the present invention carefully reviewed the method of repairing the surface of the roof of a structure. As a result, the repair sheet can be pasted on the surface of the roof of the structure instead of the woven tarpaulin. This can eliminate the gap between the roof and the roof. , giving the repair sheet performance corresponding to the characteristics of the roof. Specifically, it also includes tracking properties such as cracks and expansion caused by slate roofs, etc., waterproofing properties that prevent deterioration factors such as water and chlorine ions from penetrating, The present invention is completed by providing a layer that ensures the strength of the repair sheet itself, including salt shielding properties, neutralization prevention properties, and water vapor permeability that allows moisture in the roof to be discharged as water vapor. Moreover, this technical idea can be applied as a method of repairing components other than the roof of a structure, such as walls, eaves, fences, gate posts, gates, door roofs, etc. of the structure using repair patches.

The roof repair method of the present invention is a roof repair method in which a repair piece is adhered to the surface of the roof of a structure, wherein the repair piece includes: a polymer cement hardened layer, which is provided on the surface side of the roof of the structure; And a resin layer is provided on the polymer adhesive hardened layer.

When this invention is used, a repair sheet composed only of layers that does not include base materials, reinforcing members, etc. is used, so it can be more easily adhered to the repair location of the roof of the structure. As a result, there is no gap between the roof and the repair piece, and it can be repaired as easily as a formal repair in the same construction period as installing a woven tarpaulin. Specifically, in the roof repair method of the present invention, first, after the repair part is washed with water, an adhesive or a primer with an adhesive function is applied to the repair part with a roller, etc., and the repair part is cut off. The pieces are of appropriate size and can be pasted onto the repaired part in sequence. Only then can the repair be completed. The repair sheet used in the present invention can also be adhered in a humid environment, so it does not require a drying process and can be constructed in a short period of time. In addition, the repair sheet includes a polymer cement hardened layer and is located on the polymer hardened layer. The structure of the resin layer on the roof prevents rain leakage for a long time and protects the roof of the structure for a long time. Furthermore, the above-mentioned repair sheet has excellent adhesion to the polymer adhesive hardened layer provided on the roof side of the structure, and can provide waterproofing to the resin layer provided on the polymer adhesive hardened layer. It has excellent properties such as resistance to salt, shielding properties from neutralization, and neutralization resistance. In addition, the above-mentioned repair sheet can be mass-produced through the painting process and drying process of the factory production line. Therefore, when the present invention is adopted, cost reduction, significant reduction in on-site work period, and long-term protection can be achieved. The roof of a structure. In addition, the repair of the roof by the repair sheet of the present invention is essentially different from the previous method of arranging a woven tarpaulin to temporarily weather the wind and rain. Compared with the past, it can be very simple. work to get a long-lasting repair. The reason is that the repair sheet of the present invention has excellent water resistance and salt blocking properties, so it can protect the roof material from the intrusion of substances that damage the roof material, and it has moderate water vapor permeability. However, , this water vapor permeability allows excess moisture contained in roof materials to be released to the outside world, which can prevent corrosion or inhibit rust.

In the roof repair method of the present invention, the polymer cement hardened layer may be a layer containing a cement component and a resin, and the resin content is not less than 10% by weight and not more than 40% by weight. Furthermore, the resin content is preferably 20% by weight or more and 30% by weight or less.

According to this invention, by controlling the ratio of the cement component and the resin component, it is easier to form a polymer cement hardened layer. At the same time, the polymer cement hardened layer can easily become a layer with excellent tracking properties and good compatibility. Therefore, the adhesion of the layer itself tends to be improved. Furthermore, the adhesive component contained in the polymer adhesive hardened layer on the roof side of the structure acts to improve adhesion to the roof.

In the roof repair method of the present invention, it is desired to adhere the repair pieces together after applying an adhesive to the surface of the roof of the structure.

When this invention is used, a repair sheet composed only of layers excluding base materials, reinforcing members, etc. is used, so it can be more easily adhered to the surface of the roof of the structure. As a result, even unskilled workers can stably install the repair piece with excellent strength on the surface of the roof of the structure, significantly reducing the construction period and protecting the roof of the structure for a long time.

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

According to this invention, the primer layer provided between the roof of the structure and the adhesive serves to improve mutual adhesion. Therefore, the roof of the structure can be stably protected for a long time by the repair sheet. [Invention effect]

According to the present invention, it is possible to provide a roof repair method using repair pieces that are easier to repair the surface of the roof of a structure and can be maintained for a long period of time. In particular, it is possible to provide a repair sheet with performance corresponding to the characteristics of the roof of the structure, and use it to realize tracking of roof cracks, expansion, etc., deterioration factors such as water, chloride ions, etc., without penetrating into the roof of the structure, and having a drainable structure. The method of repairing the roof of the roof by using the repair piece to improve the permeability of moisture and deterioration factors in the roof of the object, and to improve the strength, etc. Moreover, compared with the method of applying paint for repairing leaks by hand and stacking multiple layers at the construction site, it has the advantage of improving the stability and uniformity of the quality.

[Form used to implement the invention]

Hereinafter, the roof repair method of the present invention will be described 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 affixing 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 roof repair method of the present invention. However, as shown in FIG. 1 , in the present invention, there is a process of pasting the repair sheet 1 to the surface of the roof 10 . As a method of affixing the repair sheet 1 to the surface of the roof 10, as shown in Figure 1, it can be affixed to a part of the surface of the roof 10, or it can be affixed to the entire surface of the roof 10, as long as it matches the part that needs to be repaired. The size can be determined as appropriate. Each structural element is described below.

[roof] The structure having a roof in the repair method of the present invention is not particularly limited, and examples thereof include general houses, large structures such as gymnasiums, hospitals, and public facilities. The shape of the roof of the above-mentioned structure is not particularly limited, and may include any shape such as a triangle (hanging roof), a hip roof, a square, a non-sloping roof, a one-sided sloped roof, a scalene triangle roof, a semicircular roof, etc. . Specific examples of the roof of the above-mentioned structure include, for example, a slate roof, a roof made of galvanized steel sheet (registered trademark), a galvanized iron roof (roof made of galvanized steel sheet), and a metal coated with paint. Roofs made of concrete, so-called roofs without slopes, etc. Moreover, the so-called slate has a structure in which an inorganic cosmetic (cement) layer provided on the cement layer is coated with inorganic paint through the inorganic colored stone layer. It has a simple appearance, rich colors, and is lightweight. And it is cheap, so it is widely used as a roofing material for general houses. However, slate roofs are more likely to crack than roofs made of galvanized steel sheets (registered trademark), and their durability and waterproofness are lower than roofs made of other materials, making them more likely to cause damage. Problems such as damage, etc., therefore, it is a roof that is particularly suitable for the roof repair method of the present invention. In the following description, the roof of a structure is also referred to as a "slate roof, etc." The surface of the roof of the above-mentioned structure may be flat, or may have an uneven surface similar to that of a general slate roof. Among them, the repair method of the present invention uses repair pieces of a specific structure to repair the roof of a structure. Therefore, even if the roof of the structure has uneven surfaces such as a slate roof, no gaps will be formed. In addition, by applying the repair sheet to the roof of the structure, it has the ability to track cracks, expansion, etc. caused by the roof of the structure, prevent deterioration factors such as water and chloride ions from penetrating into the roof of the structure, and prevent the structure from penetrating into the roof of the structure. The special advantage is that moisture in the roof can be discharged as water vapor. In particular, slate roofs, non-sloping roofs, etc. are materials that easily accumulate rainwater, so the ability to discharge water vapor has a greater effect on preventing material deterioration.

[restoration film] As shown in Figure 2, the repair sheet 1 used in the present invention includes: a polymer cement hardening layer 2, which is provided on the roof of the structure; and a resin layer 3, which is provided on the polymer cement hardening layer 2. The polymer adhesive hardened layer 2 and the resin layer 3 may also be formed as a single layer, or may be formed in layers. In addition, as required performance, another layer may be provided between the polymer adhesive hardened layer 2 and the resin layer 3 .

As the form of the repair sheet 1 used in the present invention during construction, it may also be in the shape of a single piece, as shown in Figure 1, or it may be in the shape of a roller. When it is in the shape of a roller as shown in Figure 1, pull out the necessary length to cut it, thereby pasting the repair piece 1 of the necessary size to the necessary part that can be repaired. Moreover, the size of the repair piece 1 is not particularly limited, and it can be appropriately adjusted to a size that can replace the previously woven waterproof cloth.

The thickness distribution of the repair sheet 1 used in the present invention is preferably within ±100 μm. The thickness distribution of this repair sheet 1 is within the above range, so that even unskilled operators can stably install a layer with smaller thickness variations on the surface of the roof of the structure. Furthermore, by controlling the thickness distribution within the above range, the roof of the structure can be reinforced more easily and uniformly. The polymer cement hardened 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 cement hardened layer 2 can provide waterproofing. Properties such as salt-shielding, neutralizing, and blocking properties. In addition, the repair sheet 1 can be mass-produced through the painting process and drying process on the factory production line, so it is possible to reduce costs, significantly reduce the on-site work period, and protect the roof of the structure for a long time. As a result, the construction period for adhering to the surface of the roof of the structure can be significantly reduced, and the roof of the structure can be protected for a long time.

Hereinafter, specific examples of each structural element of the repair sheet 1 will be described in detail. (polymer cement hardened layer) The polymer cement hardened layer 2 is a layer arranged on the roof side of the structure. This polymer adhesive hardened layer 2, for example, as shown in Figure 2(A), can also be a single layer without overlapping coating, or, as shown in Figure 2(B), it can also be a layer after overlapping coating. The accumulation. As a single layer or a laminated layer, it can be set arbitrarily by taking into account the overall thickness, the functions provided (trackability, adhesion to the roof of the structure, etc.), the manufacturing line of the factory, and the production cost. For example, when the manufacturing line is relatively large, If it is short and has a single layer but does not have a predetermined thickness, it can be formed by overlapping two or more layers. Moreover, for example, two layers are overlapped and coated, and the second layer is formed after the first layer is dried. In addition, the polymer cement hardened layer 2 may also be composed by laminating materials with different properties. For example, as a layer on the resin layer 3 side, the ratio of the resin component is further increased, whereby the layer with a higher resin component is bonded to the resin layer, and the layer with a higher cement component is bonded to the telephone pole, forming a The adhesion properties of both are very good.

The polymer adhesive hardened layer 2 is obtained by painting the resin (resin component) containing the adhesive component into a paint-like paint. Examples of the above-mentioned cement components include various cements, limestones containing components composed of calcium oxide, viscosity-containing silica, and the like. Among them, cementing agents are preferred, and examples thereof include Portland cementing agent, alumina cementing agent, rapid hardening cementing agent, and fly ash cementing agent. Whichever adhesive is selected is selected based on the characteristics that the polymer adhesive hardened layer 2 must include, for example, considering the degree of tracking of utility poles. In particular, preferred Portland cements specified in JIS R5210 can be cited.

Examples of the above-mentioned resin component include acrylic resin, acrylic urethane resin, acrylic silicone resin, fluororesin, soft epoxy resins, polybutadiene rubber, and pressure-sensitive adhesives expressing rubber characteristics. Acrylic resin (such as synthetic rubber containing acrylate as the main component), etc. Such a resin component is the same as the resin component constituting the resin layer 3 described below, but is preferable from the viewpoint of improving the adhesion between the polymer adhesive hardened layer 2 and the resin layer 3 .

The content of the above-mentioned resin component can be appropriately adjusted depending on the materials used, etc., but it is preferably 10 mass % or more and 40 mass % or less based on the total of the binder component and the resin component. When it is less than 10% by weight, the adhesiveness to the resin layer tends to decrease, or it may be difficult to maintain the polymer cement hardened layer as a layer. When it exceeds 40% by weight, it may cause problems with the structure. The adhesiveness of the roof becomes insufficient. From the above point of view, the optimum range of the content of the resin component is 10% by weight or more and 40% by weight or less. However, it is more preferably 20% by weight or more and 30% by weight or less.

The coating used to form the polymer adhesive hardened layer 2 is a stucco liquid in which adhesive components and resin components are mixed with a solvent. As for the resin component, it is best to be an emulsion. For example, acrylic emulsion uses an emulsifier to emulsify and polymerize polymer particles of monomers such as acrylate. This is an example. It is preferable to contain at least one of acrylate and methacrylate. An acrylic polymer emulsion composed of monomers or monomer mixtures polymerized with water mixed with surfactants. The content of acrylates and the like constituting the acrylic emulsion is not particularly limited, but is selected from the range of 20 to 100% by mass. Furthermore, the amount of the surfactant to be mixed is not particularly limited depending on the required amount. However, the amount of the surfactant to be mixed is sufficient to form an emulsion.

The polymer cement hardened layer 2 is formed by applying the stucco liquid to the release plate, and then drying and removing the solvent (preferably water). For example, a mixed composition of a cement component and an acrylic emulsion is used as a stucco liquid to form the polymer cement hardened layer 2 . Moreover, the resin layer 3 can also be formed on the above-mentioned release plate after the polymer adhesive hardened layer 2 is formed. However, it is also possible to form the polymer adhesive hardened layer after the resin layer 3 is formed on the release plate. 2.

The thickness of the polymer cement hardened layer 2 is not particularly limited, but can be set arbitrarily depending on the state (damage condition) and shape of the roof of the structure. As a specific thickness of the polymer cement hardened layer, it can be in the range of 0.5 mm to 1.5 mm, for example. As an example, when the thickness is 1 mm, the thickness variation is preferably within ±100 μm. Such a precise thickness cannot be achieved during on-site painting. It can be achieved by stably 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 made smaller.

This polymer adhesive hardened layer 2 also contains an adhesive component, and compared with the resin layer 3 described below, water vapor can easily pass through it. The best water vapor transmission rate of the polymer cement hardened layer 2 is, for example, about 20 to 60 g/m ² ･day. Furthermore, the adhesive component has good compatibility with, for example, the adhesive component constituting concrete, and can have excellent adhesion to the roof surface of the structure. In addition, as shown in Figure 3, when the primer layer 22 and the adhesive agent 23 are sequentially provided on the surface of the roof 21, the polymer adhesive hardened layer 2 containing the adhesive component is also adhered with good adhesion. to adhesive 23. In addition, the polymer adhesive hardened layer 2 has extensibility, so even when cracks, expansion, etc. occur in the roof 21, changes in the roof of the structure can be tracked.

(resin layer) As shown in FIG. 3(C) , the resin layer 3 is disposed on the opposite side of the roof 21 and appears on the surface. The resin layer 3 may be a single layer, as shown in FIG. 2(A) , or may be a laminated layer composed of at least two layers, as shown in FIG. 2(B) . As a single layer or a laminated layer, it is set taking into consideration the overall thickness, the provided functions (waterproofing, salt shielding, neutralization barrier, water vapor permeability, etc.), the length of the factory's manufacturing line, and production costs, etc. For example, when the manufacturing line is short and the single layer does not have a predetermined thickness, two or more layers can be overlapped and coated to form it. In addition, overlapping coating is performed by drying the first layer and then painting the second layer. After the 2nd layer is applied, it is dried.

The resin layer 3 is flexible and can be painted to trace cracks, cracks, etc. that occur on the roof surface of the structure. At the same time, it can form a resin with excellent waterproof properties, salt shielding properties, neutralization barrier properties, and water vapor permeability. layer of paint to get it. Examples of the resin constituting the resin layer 3 include acrylic resin showing rubber characteristics (for example, synthetic rubber containing acrylate as a main component), acrylic urethane resin, acrylic silicone resin, fluororesin, and soft epoxy. Resin, and polybutadiene rubber, etc. This resin material is preferably the same as the resin component constituting the polymer adhesive hardened layer 2 . In particular, resins containing elastic film-forming components such as rubber are preferred.

Among them, acrylic resin, which exhibits rubber characteristics, is preferably composed of an aqueous emulsion of an acrylic rubber copolymer in view of its excellent safety and paintability. Furthermore, the proportion of the acrylic rubber copolymer in the emulsion is, for example, 30 to 70% by mass. Acrylic rubber copolymer emulsion is obtained, for example, by emulsifying polymerized monomers in the presence of surfactants. As the surfactant, any of anionic, nonionic, and cationic surfactants can be used.

The coating used to form the resin layer 3 is to prepare a mixed stucco liquid of a resin composition and a solvent, apply the stucco liquid to the release plate, and then dry and 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 or mineral oil. In the embodiments described below, aqueous solvent is used to make the resin layer 3 from an acrylic rubber composition. Moreover, the order of the layers formed on the release plate is not limited. For example, as mentioned above, it can also be the order of the resin layer 3 and the polymer adhesive hardened layer 2, or it can also be the polymer adhesive hardened layer. 2. The sequence of resin layer 3. It is best to form the resin layer 3 on the release plate, and then form the polymer cement hardening layer 2 .

The thickness of the resin layer 3 can be arbitrarily set depending on the state (damage condition), shape, etc. of the roof 21 . As an example, the thickness is in the range of 50 to 150 μm. The thickness varies, and it is best to be 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 waterproofing properties, salt shielding properties, and neutralization blocking properties, but preferably is permeable to water vapor. The water vapor transmittance of the resin layer 3 is preferably adjusted appropriately so that the water vapor transmittance of the repair sheet 1 becomes 10 to 50 g/m ² ･day. In this way, the repair sheet 1 can have high waterproof properties, salt shielding properties, neutralization barrier properties, and predetermined water vapor permeability. Furthermore, since it is composed of the same resin component as the polymer adhesive hardened layer 2, it has good compatibility with the polymer adhesive hardened layer 2 and has excellent adhesion. Water vapor permeability has been measured in accordance with JIS Z0208 "Test method for moisture permeability of moisture-proof packaging materials".

In addition, the resin layer 3 may also contain pigments from the viewpoint of enabling a richer color change of the repair sheet 1 used in the present invention. Moreover, the resin layer 3 may contain an inorganic substance. By containing inorganic substances, scratch resistance can be imparted to the resin layer 3 . The inorganic substance is not particularly limited, and examples thereof include conventionally well-known materials such as metal oxide particles such as silica, aluminum oxide, and titanium dioxide. Furthermore, the resin layer 3 may contain a well-known antifouling agent. The repair sheet used in the present invention is used for repairing roofs of structures that are usually installed outdoors. Therefore, the resin layer 3 is often contaminated. However, by containing an antifouling agent, the repair sheet can be well prevented from being contaminated. . In addition, the resin layer 3 may contain additives that can impart various functions. Examples of such additives include cellulose nanofibers.

(Other structures) The manufactured repair piece 1 may also include a release plate on one of the surfaces of the polymer adhesive hardened layer 2 and the resin layer 3 . The release board can protect the surface of the repair piece 1 when, for example, it is transferred to the construction site. At the construction site, it is adhered to the target roof 21 (or through the primer layer 22 or the adhesive layer 23). There is a repair piece 1 of the release plate, and then the release plate is peeled off, thereby greatly improving the workability at the construction site. Furthermore, the release plate may be a process paper used in the production process of the repair sheet 1, or may be pasted with a protective film such as a polyethylene terephthalate film.

As long as the process paper used as the release plate is a well-known one used in the manufacturing process, its material is not particularly limited. For example, a laminated paper having an olefin resin layer such as polypropylene, polyethylene, or the like, or a silicon-containing layer, similar to well-known process paper, may be used. The thickness is not particularly limited. However, as long as the thickness does not hinder processing in terms of manufacturing and construction, it can be any thickness, for example, about 50 to 500 μm.

The repair piece 1 described above can protect the roof 21 for a long time. In particular, it is possible to impart performance corresponding to the characteristics of the roof 21 to the repair sheet 1, to track cracks, expansion, etc. generated in the roof 21, to prevent deterioration factors such as water and chlorine ions from penetrating into the roof 21, and to have a function that can be discharged into the roof 21. Permeability of moisture, deterioration factors, etc. Moreover, such a repair piece 1 can be manufactured in a factory, so it can be mass-produced with stable characteristics and high quality. As a result, construction can be carried out without relying on the skills of technicians, shortening the construction period and reducing labor costs. Moreover, design properties can be imparted to the surface of the resin layer 3. Therefore, by sticking the repair sheet 1 to the roof 21, design properties can also be imparted. Furthermore, the above-mentioned method of imparting design properties is not particularly limited, and examples thereof include providing a concave and convex shape using a well-known method, or a method of imparting design properties by printing.

The roof repair method of the present invention, as shown in Figure 3, adheres the repair piece 1 to the surface of the roof 21. In the present invention, it is preferable to apply the adhesive 23 to the surface of the roof of the structure and then stick it with the repair piece 1 . This construction method can make it easier for the surface of the roof 21 and the repair piece 1 to stick together. As a result, even unskilled workers can install the repair piece 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.

Figure 3 is an explanatory diagram of the method of pasting the repair piece 1. As shown in FIG. 3(A) , it is preferable to form a primer layer 22 on the surface of the roof 21 . The base coat 22 can be formed by painting the roof 21 with a stucco liquid mixed with a resin such as epoxy resin and a solvent, and then evaporating and drying the solvent in the stucco liquid. Examples of the solvent at this time include water. The thickness of the undercoat layer 22 is not particularly limited, but may be in the range of 100 to 150 μm, for example. The base coating 22 provided between the roof 21 and the adhesive 23 improves mutual adhesion, so the repair sheet 1 can stably protect the roof 21 for a long period of time. Furthermore, for cracks, defects, etc. caused in the roof 21, it is best to provide the primer 22 after repair. In addition, the repair system is not particularly limited, but cement mortar, epoxy resin, etc. are usually used.

After forming the undercoat layer 22, as shown in FIG. 3(B), it is preferable to apply the adhesive 23. After applying the adhesive 23, preferably without drying, adhere the repair piece 1 on it as shown in Figure 3(C). Examples of the adhesive 23 include urethane adhesives, epoxy resin adhesives, and acrylic resins showing rubber characteristics (for example, synthetic rubber containing acrylate as a main component). adhesives, etc. Among them, the one 23 composed of the same resin component as the resin component of the polymer cement hardened layer 2 constituting the repair piece 1 has a high bonding strength with the polymer cement hardened layer 2, so it is good. The thickness of the adhesive 23 is not particularly limited. The adhesive 23 is usually applied by brushing or spraying, and then dries naturally to harden over time. Moreover, with the selection of the above-mentioned adhesive material, the primer does not have to be present, and the repair piece can be adhered to the surface of the roof of the structure through only one layer of adhesive. Example

The present invention will be explained more specifically by examples and comparative examples.

(Manufacturing example 1) Prepare a release plate with a thickness of 130 μm made of PP laminated paper, and form a resin layer on the release plate 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 titanium trioxide, and 5 parts by mass of carbon black was prepared. After the emulsion composition is applied to the above-mentioned release plate, it is heated to harden to form a resin layer. The thickness of the resin layer is 0.1mm. Next, a polymer cement hardened layer is formed on the resin layer. Specifically, an adhesive mixture containing 45 parts by mass of aqueous acrylic emulsion was prepared as a composition for forming a polymer adhesive hardened layer. Here, the cement mixture contains at least 70 ± 5 parts by mass of Portland cement, 10 ± 5 parts by mass of silica, 2 ± 1 parts by mass of alumina, and 1 to 2 parts by mass of titanium oxide. The emulsion uses acrylate monomer as an emulsifier and contains at least 53±2 parts by mass of acrylic polymer and 43±2 parts by mass of water after emulsion polymerization. The composition for forming a polymer adhesive hardened layer after drying and mixing is applied to obtain a polymer adhesive hardened layer, which is a composite layer containing 50% by mass of Portland adhesive in acrylic resin. . The above composition for forming a polymer adhesive hardened layer was painted onto a resin layer and dried to form a polymer adhesive hardened layer with a thickness of 1.29 mm consisting of a single layer. In this way, a repair piece 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 piece obtained in Production Example 1 was evaluated, and the breaking strength was measured with a tensile testing machine (made by Shimadzu Corporation, AGS-J). After measuring with a width of 50 mm, the strength of Manufacturing Example 1 was 1500N. [Measurement of Thickness Variations] For Manufacturing Example 1, a repair sheet rolled into a roller shape was cut out to about A4 size (200mm × 300mm), and the thickness was measured at 14 places on each part, and the thickness variation was calculated. In Production Example 1, the thickness variation was 26 μm.

(Manufacturing Examples 2 to 4) In Production Example 1, the total thickness of the repair pieces was changed. Manufacturing Example 2 produced a repair piece with a total thickness of 0.76 mm after laminating a polymer adhesive hardened layer with a thickness of 0.66 mm and a resin layer with a thickness of 100 μm. Manufacturing Example 3 produced a repair piece with a total thickness of 1.06 mm after laminating a polymer adhesive hardened layer with a thickness of 0.96 mm and a resin layer with a thickness of 100 μm. Manufacturing Example 4 produced a repair piece with a total thickness of 1.57 mm after laminating a polymer adhesive hardened layer with a thickness of 1.47 mm and a resin layer of 100 μm. Otherwise, it is the same as Production Example 1.

[Strength and Water Vapor Transmission Rate] Regarding Production Examples 2 to 4, the strength and water vapor transmission rate of the repair sheet were measured. The strength is evaluated based on the breaking strength measured with a tensile testing machine (made by Shimadzu Corporation, AGS-J). Water vapor transmission rate (WVTR), also known as "water vapor permeability", is the amount of water vapor that can pass through a 1m ² film (repair patch) in 24 hours, expressed in grams, g/m ² ･day Or expressed in g/ml/day. It is used as an indicator of water vapor barrier properties. Measured in compliance with JIS Z0208 (B) method.

The measurement result of the width of 50mm shows that in Production Example 2, the strength is 1200N and the water vapor transmittance is 18.2g/m ² ･day. In Production Example 3, the strength is 1500N and the water vapor transmittance is 13.0g/m ² ･day. In Production Example 4, the strength is 1600N and the water vapor transmission rate is 10.2g/m ² ･day. At any thickness, strength and water vapor transmission rate can be used without problems.

(Example 1) For an ordinary single-family house with a slate roof that is 15 years old and has leaks, the following method is used to repair the roof using the repair sheet of the present invention. First, observe the situation of rain leakage from inside and outside the house, and designate an approximately square area of 15 square meters on the part of the slate roof that is considered to be the cause. Restoration film. Moreover, almost all of this area is occupied by stone slabs, but there is also a metal top called a roof ridge in part. When adding repair pieces, use P300 (trade name) as an epoxy resin adhesive manufactured by Toa Gosei Chemical Co., Ltd. for the slate roof part, and use P300 (trade name) manufactured by SEMEDAIN Co., Ltd. for the metal ridge part. Adhesive SEMEDAIN PM165-RX (trade name). After applying adhesive to all parts of the roof and ridge, use the hand press used to seal and crimp the repair piece to make the surface even and apply. The repair piece constructed in this way is fixed to the roof material a few hours after construction, and the adhesive is completely hardened in about two weeks. After it is completely hardened, it is visually confirmed that there is no positional deviation since the construction. For this object, after three months since the construction started, after confirming with the residents, even if it rains after the construction, it will no longer leak. It is confirmed that the repair method of the present invention is effective in preventing Rain leaks. In addition, visual inspection by the present inventors also confirmed that there was no deviation from the construction position, no peeling or floating from the roof, and that the repair was durable. Furthermore, it was confirmed that the same effect was obtained by using the protective plates of Production Examples 2 to 4 in which the total thickness was changed.

1: Repair film 2:Polymer cement hardened layer 3: Resin layer 10,21,30:Roof 22: Base coat 23: Adhesive 31: Woven tarpaulin 32:Sandbag

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

1: Repair film

10:Roof

Claims (4)

A method of repairing a roof by pasting the repair piece onto the surface of the roof of a structure, which is characterized by: The repair sheet includes: a polymer cement hardened layer, which is provided on the surface side of the roof of the structure; and a resin layer, which is provided on the polymer cement hardened layer. For example, the roof repair method of claim 1, wherein the polymer cement hardened layer is a layer containing a cement component and a resin, and the resin contains 10% by weight or more and less than 40% by weight. For example, the roof repair method of claim 1 or 2, wherein after applying adhesive to the surface of the roof of the structure, the adhesive is adhered to the repair piece. For example, the roof repair method of claim 3, wherein a primer is provided between the surface of the roof of the structure and the adhesive.