JP4686384B2 - Building exterior repair method - Google Patents

Description

  The present invention relates to a method for repairing an exterior of a building that has deteriorated over time.

  Generally, the exterior of a building such as a building is composed of various materials such as tiles, stones, concrete slabs, and steel plates.

  Even if these buildings are new, they may be cracked, chipped or soiled when subjected to local stress such as something hitting the exterior. There is also. In such a case, the exterior is repaired by using a special adhesive or cement mortar for repairing cracks and chips. In addition, when the exterior is washed with a special cleaning agent that removes dirt, or when the dirt does not fall off, the paint is further applied to remove the dirt.

  However, unlike repairing such a new exterior, if the building has deteriorated over time and the entire exterior has deteriorated, tiles and stones will be cracked, leaving the concrete unfinished. In this case, the surface becomes dark due to mold or the like, and in the case of a steel plate, it corrodes, and in either case, the appearance is greatly deteriorated.

  Therefore, the exterior of a building that has deteriorated over time has been conventionally repaired.

  In the case of the exterior of tiles and stones, all tiles and stones were peeled off even when some exteriors were cracked. And repaired with new tiles and stones. That is, even if some exteriors are cracked, the same tiles as other tiles that have not been cracked are often not available after many years. I can't. In addition, even though the surface is not cracked, the surface has deteriorated due to the effects of acid rain, exhaust gas, ultraviolet rays, etc., and has deteriorated over its service life. This is because there is a concern that deterioration such as cracks may occur from the old exterior part.

  In the case of a concrete-unfinished exterior, the surface was polished until there was no darkening of the surface, and then mortar resin paint was applied to reproduce the texture of the concrete that was left behind.

  In the case of the steel plate exterior, as in the case of the tile or stone exterior, after removing all the steel plates, a new steel plate is re-applied and repaired, or the surface of the concrete is not overlaid. After polishing, the surface was repaired by buffing or painting.

  However, in the case of the conventional repair method, the following inconvenience occurs.

  That is, when the exterior is completely replaced and repaired, such as an exterior such as a tile, stone, or steel plate, the removed exterior is generated as a large amount of industrial waste. Such a large amount of industrial waste cannot be easily disposed of due to efforts to improve the natural environment in recent years, resulting in an enormous cost for disposal. Therefore, there arises a disadvantage that enormous repair costs are increased.

  Therefore, it may be possible to repair only the cracked or corroded part and use the other part as it is, but in the case of repair due to deterioration over time, it is different from the case where it is physically broken and repaired. The other parts that are not cracked are not physically broken, and the surface is considerably deteriorated, so there is a high possibility that cracks will occur soon, and the appearance will soon deteriorate. Become. Such repairs may be performed frequently for small items such as household items that are close to you, but when it comes to the exterior of a building, the scaffolding will be assembled and the work will be large. Repairs cannot be made frequently.

  Also, when the surface of the concrete is reproduced by applying mortar resin paint after polishing the surface, as in the case of concrete-exposed exterior, the color of the concrete base itself is whitish, so dirt is conspicuous. It becomes easy.

  The present invention has been made in view of such circumstances, and an object thereof is to provide a method for repairing an exterior of a building that is environmentally friendly, can be repaired at low cost, and has excellent durability.

A method of repairing an exterior of a building according to the present invention for solving the above-mentioned problem is a method of repairing an existing exterior of a building, wherein the entire exterior surface of a tiled outer wall or a stone-attached outer wall is treated with ammonium fluoride. After washing with the outer wall cleaner and neutralizing, check the pH of the litmus paper against the outer wall to check whether it has been neutralized, wash with water, wash, then fill the cracked portion with the putty and fill with the putty A coating agent comprising a silane coupling agent having a silyl group and an organic functional group on the entire exterior surface after coating the color of the cracked portion and the existing portion, and methacryl-acrylic alkoxy A siloxane bond is obtained by coating a silane-modified random polymer and an alkoxysilane curing agent in a volatile solvent and drying at room temperature for use in a two-component solvent mixture type. And it forms a cured film having.

The building exterior repair method of the present invention for solving the above problems is a method of repairing an existing exterior of a building, and the entire surface of the exterior surface of the outer wall on which a steel plate is pasted is an acid fluoride ammonium outer wall cleaning agent. After washing and neutralizing, the pH of the litmus paper is contacted with the outer wall to check whether it has been neutralized, washed with water, washed , then the dirty part is polished to remove the dirt, A coating agent comprising a silane coupling agent having a silyl group and an organic functional group on the entire exterior surface after coating for color matching with an existing part, comprising a methacryl-acrylic alkoxysilane-modified random polymer, A two-part solvent mixed type that is mixed with an alkoxysilane curing agent in a volatile solvent and dried at room temperature to form a cured film having a siloxane bond A.

Furthermore, the exterior repair method for a building of the present invention for solving the above-described problem is the above exterior repair method for a building, in which the outer wall is an outer wall made of concrete, and a paint for performing color matching coating, and a coating agent, Are mixed to perform color matching coating and formation of a cured film over the entire exterior surface in one step.

As described above, according to the first and second aspects of the invention, since it is possible to repair without removing the existing exterior composed of the outer wall to which the tile, stone, steel plate, etc. are attached , the tile, stone, It eliminates the generation of industrial waste such as steel plates and can perform repairs that are friendly to the natural environment.

  Further, since no industrial waste is generated, it is possible to repair at low cost by reducing processing costs.

  Furthermore, a cured film having a siloxane bond can be formed on the entire repaired exterior surface, so even with an exterior that has deteriorated over time, superior surface hardness provides superior durability over a newly constructed exterior. be able to.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 shows before and after repairing the outer wall 2 of a building 1 that has deteriorated over time, and FIGS. 2 to 6 show the repairing process of the outer wall 2 in the building 1.

  That is, in the repair method of the outer wall 2 of the building 1, after cleaning the entire surface of the outer wall 2, the crack 22 of the tile 21 is filled with the putty 3, and the crack 22 having the putty 3 is filled with the existing crack 22. After performing color matching coating 4 with the location of the tile 21, a coating agent containing a silicon-containing compound and an acrylic copolymer is applied to the entire surface of the outer wall 2 to form a cured film 5 having a siloxane bond. Is.

  In cleaning the entire surface of the outer wall 2, as shown in FIGS. 2 and 3, the entire surface is cleaned, and the dirt A clogged at the cracks 22 is removed. This cleaning may be performed using a cleaning agent, or only with water. The cleaning method may be performed by a brush or a sponge, or may be performed by high pressure cleaning in which water or an aqueous solution of a cleaning agent is sprayed onto the outer wall 2 at a high pressure.

  In the case of using a cleaning agent, the cleaning agent is not particularly limited as long as it is used for cleaning this type of outer wall 2. For example, an acid fluoride ammonium outer wall cleaning agent (Krinshi Trading Co., Ltd. Etc.) can be suitably used. When cleaning is performed using such an outer wall cleaning agent, the surface of the outer wall 2 is neutralized and then washed with water to complete the cleaning. After the neutralization treatment, the pH is confirmed whether or not the litmus paper is brought into contact with the outer wall 2 to be neutralized.

  In the operation of filling the cracks 22 with the putty 3, as shown in FIG. 4, the putty 3 is filled in the cracks 22 of the outer wall 2 that have been soiled by the cleaning operation. In this case, the work of filling with putty 3 is performed in two steps. That is, first, the putty 3 is first filled in the cracks 22. In this case, the putty 3 is firmly filled in the cracks 22, and the putty 3 colored in a color different from that of the outer wall 2 is filled and dried so that it can be confirmed that the filling is not forgotten. Next, a putty 3 having a color similar to that of the outer wall 2 is filled from above the putty 3, and after drying, the surface is polished to finish flush with the surface of the outer wall 2.

  At this time, the putty 3 to be used is not particularly limited as long as it is used for the crack 22 of the outer wall 3 of this type. For example, a polyester-based two-pack type adhesive (Akemi Co., Ltd.) Manufactured by Akemi Marble Filler 1000) and the like can be suitably used.

  In this way, after putting the putty 3 in the place of the crack 22, the color matching coating 4 is performed on the outer wall 2. In this color matching coating 4, the coating 4 is performed so that the color of the crack 22 filled with the putty 3 and the color of the existing tile 21 are the same. First, the primer coating 4 is performed and dried, and then the color matching coating 4 is performed. At this time, the coating operation may be spray coating, brush coating, or coating with a roller, and is not particularly limited. However, in the case of the outer wall 2 on which the tiles 21 are affixed as in the present embodiment, the coating 4 is applied only to the portion of the tiles 21, as shown in FIG. Must be done. In the case of brush coating or rollers, the joints are recessed, so that it can be applied only to the tiles 21 as they are.

  Note that the joints are not conspicuous like the surface of the tile 21 which is recessed, so it is sufficient to fill the putty 3 in the cracked place, or only the primer coating 4 is tiled. You may carry out with the part of 21.

  Further, these coatings 4 may be performed on the entire outer wall 2 or may be performed only on a portion where the crack 22 has been repaired. However, in the case of the outer wall 2 that has passed a considerable number of years, the outer wall 2 can also be protected by this coating 4, so that it is preferable to perform the entire outer wall 2 in consideration of weather resistance. The paint used for this coating 4 is not particularly limited as long as it can be used at room temperature and can exhibit excellent performance. For example, polyurethane resin paint (Polyauto manufactured by Takashi Kubo Paint Co., Ltd.) An undercoat material (Nippe AC transparent sealer manufactured by Nippon Paint Co., Ltd.) can be used.

  The coating agent is applied to the entire surface of the outer wall 2 where the coating 4 has been completed. In this case, the coating operation may be spray coating, brush coating, or coating with a roller, and is not particularly limited.

  As the coating agent used for this application, a coating agent made of a silane coupling agent having a silyl group and an organic functional group and capable of forming a cured film 5 having a siloxane bond after curing is used. Specifically, a methacryl-acrylic alkoxysilane-modified random polymer and an alkoxysilane-based curing agent are mixed in a volatile solvent, such as a low-temperature ceramic coating agent (ceramic tough manufactured by Environmental Techno Co., Ltd.). Then, it is preferable to use a two-component solvent mixed type which is dried at room temperature and used. By applying such a coating agent, a cured film 5 having a siloxane bond is formed on the entire surface of the outer wall 2.

  The outer wall 2 repaired in this manner is repaired by the putty 3 on the cracks 22 of the tile 21, and the tile 21 that has deteriorated as a whole is a new tile by the coating 4 and the cured film 5 formed on the surface. A durability equivalent to 21 will be obtained. In particular, in the case of repairing the building 1, since the object itself is large, after the surface coating 4, it could not be baked in a curing furnace and could only be naturally dried, but a cured film having a siloxane bond No. 5 has a hardness similar to that of inorganic quartz glass even in natural drying, and has a surface hardness superior to that of a new tile 21 or higher, and therefore, even the cured film 5 alone can provide excellent durability. Further, when the cured film 5 is formed after the entire surface of the outer wall 2 is coated 4, further excellent durability can be obtained by protecting the double film by the cured film 5 and the coating 4. Become.

  Moreover, in this repair method, since it can repair without removing the existing outer wall 2, generation | occurrence | production of an industrial waste can be eliminated and repair easy on a natural environment can be performed. Further, since no industrial waste is generated, it is possible to repair at low cost by reducing processing costs.

  In the present embodiment, the outer wall 2 with the tile 21 is shown as the exterior, but the outer wall 2 is not particularly limited to the outer wall 2 with the tile 21, and is an outer wall on which a stone material such as marble is attached. It may be the outer wall which stuck the steel plate. Further, the outer wall may be a concrete wall.

  In the case of the outer wall on which the stone material is pasted, it can be repaired in the same work process as the case of the outer wall 2 on which the tile 21 is pasted.

  In the case of the outer wall on which the steel plate is pasted and the outer wall on which the concrete is not placed, the process is somewhat different from the case of the outer wall 2 on which the tile 21 is pasted, so only the difference will be described.

  In the case of an outer wall with a steel plate attached, the surface is polished to remove the corroded portion, and then the surface is prepared by buffing or painting. Thereafter, a coating agent is applied to the entire surface of the outer wall to form a cured film 5 having a siloxane bond.

  In this case, even if the surface is prepared by painting or the like after removing the corroded portion, the coating cannot be applied to a degree that does not impair the texture of the metal and cannot be thickly applied. In addition, in the case of buffing, the texture of the metal is not impaired, but the material is exposed. However, this repair method finally applies a coating agent to the entire surface of the outer wall to form a cured film 5 having a siloxane bond, so even if it is not thickly coated or the material is exposed, it is durable. Repair with excellent properties can be performed.

  In the case of a concrete wall that has not been crushed, remove the soiled areas by cleaning or polishing the surface, and then paint the surface to the extent that the texture is not impaired. Thereafter, a coating agent is applied to the entire surface of the outer wall to form a cured film 5 having a siloxane bond.

  In this case as well, as in the case of the outer wall on which the steel plate is pasted, the coating can be performed only to the extent that the texture of the concrete is not impaired, but the cured film 5 having a siloxane bond formed on the entire surface of the outer wall. This makes it possible to perform repairs with excellent durability while leaving the concrete texture.

  In addition, when the entire outer wall is of a single color, such as an outer wall that has been laid concrete, a paint that performs color matching coating and a coating agent are mixed, and the color matching coating and cured film are applied to the entire exterior surface in one step. Can also be formed.

  Can be used for exterior repair of existing buildings.

(A) is the schematic of the whole building before repair, and its partial enlarged view, (b) is the schematic of the whole building after repair. (A) is the partial enlarged plan view of the outer wall before repair, (b) is the II-II sectional view taken on the line in the same figure. (A) is the elements on larger scale of the outer wall after wash | cleaning an outer wall in the repair method which concerns on this invention, (b) is the III-III sectional view taken on the line in the same figure. (A) is the elements on larger scale of the outer wall after putting the putty in the outer wall in the repair method which concerns on this invention, (b) is the IV-IV sectional view taken on the line in the same figure. (A) is the partial enlarged plan view of the outer wall after coating on the outer wall in the repair method which concerns on this invention, (b) is the VV sectional view taken on the line in the same figure. (A) is the elements on larger scale of the outer wall after repair completion in the repair method which concerns on this invention, (b) is the VI-VI sectional view taken on the line in the same figure.

Explanation of symbols

1 Building 2 Exterior wall (exterior)
22 Cracks 3 Putty 4 Paint 5 Cured film

Claims (3)

A method of repairing an existing exterior of a building,
After cleaning the entire exterior surface of the tiled outer wall or stone wall with an acid ammonium fluoride outer wall cleaner and neutralizing it, the pH of the litmus paper was contacted with the outer wall to check whether it was neutralized. After washing with water and washing, fill the cracked part with putty, paint the color matching between the putty cracked part and the existing part, then silyl group and organic functional group on the entire exterior surface A methacryl-acrylic alkoxysilane-modified random polymer and an alkoxysilane curing agent mixed in a volatile solvent and dried at room temperature. A method for repairing an exterior of a building, comprising applying a two-liquid solvent mixed type to form a cured film having a siloxane bond. A method of repairing an existing exterior of a building,
After cleaning the entire exterior surface of the outer wall with the steel plate attached with acidified ammonium fluoride outer wall cleaner and neutralizing it, the pH of the litmus paper was contacted with the outer wall to check whether it was neutralized and washed with water. After cleaning, grind the soiled area to remove the dirt, paint the color matching between the ground area and the existing area, and then from the silane coupling agent having a silyl group and an organic functional group on the entire exterior surface A two-component solvent-mixing type coating composition that is used by mixing a methacryl-acrylic alkoxysilane-modified random polymer and an alkoxysilane-based curing agent in a volatile solvent and drying at room temperature. A method for repairing the exterior of a building, characterized in that a cured film having a siloxane bond is formed by applying a coating.   3. The method of repairing a building exterior according to claim 2, wherein the outer wall is an outer wall made of concrete, and a paint for color matching is mixed with a coating agent to coat the entire exterior surface in one step. And exterior repair method of building that forms cured film.

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