JPS6133947B2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention provides a method for constructing a decorative wall surface, which involves applying mortar once on a wall base using a special wall base board, and scraping off the lysine to finish. Regarding.

The wall base in this invention can be used in place of the process up to the wall undercoating on top of glass underboard, asphalt felt, and lath netting in conventional construction methods, or in place of the process up to the wall interior coating. In this way, a wall baseboard with an uneven coating layer made by mixing resin paint, inorganic particles and powder on the surface of a plate-like material such as plywood or fiberboard is used as a baseboard for the interior and exterior walls of a building. be.

Applying mortar on the wall base like this,
In order to form a decorative wall surface with a ricin scraped finish that does not cause cracks or peeling, a certain construction method is required.

Conventionally, in the construction of decorative interior and exterior walls of mortar-coated buildings, especially exterior walls, a lath underboard was pasted on the studs, rims, etc., an asphalt felt net was stretched over it, and this lath net was used as an undercoat layer. The interior was filled in, a medium coat was applied on top of that to create a flat surface, and a finishing coat was applied on top of that to create a decorative wall surface. This kind of work not only requires a curing period for each primer and intermediate coat, and requires a considerable amount of construction time, but the resulting wall is made up of the thickness from the base coat to the final coat, and the building is covered with lath netting. It is only connected with a stable material, which is prone to cracking and peeling.

In order to improve this conventional wall construction method, the surface of a substrate such as plywood or fiberboard is coated with a resin paint or adhesive mixed with inorganic material particles and powder.
An attempt was made to simplify construction by nailing and pasting a wall baseboard, which has a coating layer that adheres well to the substrate and has an uneven surface, to the studs, rims, or pillars, and then applying wall material to this. A proposal was made to

Indeed, the use of this type of wall base board is based on lath base board,
Since the construction of asphalt felt and lath mesh is not required, the work is simplified, and if the wall material is sufficiently bonded to the uneven coating layer on the wall base board, the conventional undercoating work and its curing period are unnecessary. become,
This is preferable because it significantly saves labor in wall forming work and shortens the construction period.

However, in general, there are many dry cracks, especially along the joints of the wall base plate, and the cracks occur along the joints of the wall base plate, and rainwater gets around between the surface of the wall base plate and the painted wall material, or the wall base plate becomes damp. to expand the woody part,
Disadvantages include peeling off painted walls and corrosion of wall base plates and columns. Therefore,
The structure of the wall base board itself is such that a waterproof resin coating layer with good adhesion is formed between the board surface and the above-mentioned uneven coating layer, and the joints of the wall base board are also filled with a sufficient amount of joint compound. Efforts have been made to improve this, such as chamfering the periphery of the substrate surface, but this has not resulted in a sufficient improvement. On the other hand, regarding peeling between the wall base plate and the painted wall material, if you try to prevent the peeling by increasing the pressure, you will end up finishing with a thin coat, but the joint material may be visible from the surface, or the wall base plate may peel off. Due to the difference in water absorption between the surface unevenness of the paint layer and the joint sealant part, variations occur in curing and hardening, and a limit of color difference appears on the wall surface, making it impractical. In addition, if you apply two coats, an intermediate coat and a top coat, to prevent this, there will be a curing period for the intermediate coat, which will not only make it impossible to efficiently shorten the construction time, but also cause dry cracking due to thick coating. .

Therefore, the present invention uses a finishing wall material with a high aggregate content, which originally has low strength and low adhesion, to perform a ricin scraping finish on a wall base using the above-mentioned wall base board. Moreover, it is an object of the present invention to provide a method for constructing a decorative wall surface with a single finishing coat so that cracks are less likely to occur and peeling and color unevenness of the finish are not caused.

For this purpose, in the present invention, a coating material containing a mixture of resin paint or adhesive and inorganic particles or powder is applied to the surface of plywood, fiberboard, etc. directly or through a waterproof layer as a wall base board. Using a factory product that has been applied to the surface to form an uneven coating layer, a cement mortar containing synthetic resin is used as a joint agent, almost the same as the uneven coating layer on the wall base board. Furthermore, the above object is achieved by using a material mixed with fibers such as glass fiber and asbestos, and by using a top coating agent having the composition described below for the ricin scraping finish wall material.

Further, this will be explained in more detail using the drawings as follows.

The drawing shows a wall in which two wall base plates 1 and 1' are butted together and nailed onto a single stud 2, and a joint sealant 3 and a finishing coat 4 and 4' have been applied on top of that. shows the transverse plane of

The illustrated wall base plates 1 and 1' are made of 7.5 mm structural plywood 5.
A chamfered surface 6 of 30 to 60 degrees is formed on the surface periphery, and a rubber latex such as butadiene acrylonitrile rubber (NBR), butadiene styrene rubber (SBR), butadiene methyl methacrylate rubber (MBR) is applied to the surface and dried to make it waterproof. It is produced in a factory where a coating 7 is formed, and then a coating material made of a mixture of cement, rubber latex or other synthetic resin emulsion, silica sand, calcium carbonate, etc. is applied using a roll coater or the like to form an uneven coating layer 8. This is the wall base plate. Of course, instead of the plywood 5, a wood fiber board, an asbestos cement board, a wood chip board, or the like may be used. Further, the waterproof coating 7 is not limited to rubber latex, and may be made of other synthetic resins.

Such wall base plates 1, 1' are made of nails, bolts,
It can be attached with adhesive, etc. Joint treatment is performed by filling a V-shaped groove formed by each chamfered surface 6 at the joint between the wall base plates 1 and 1' with a joint filler 3.

This joint filler 3 is a mixture of cement such as ordinary Boltland cement, mixed Boltland cement, or white cement, and one or more synthetic resins such as rubber latex, vinyl acetate, and acrylic, and fibers and aggregate. and a thickening water-retaining agent such as methylcellulose (MC) to increase viscosity and improve workability. The synthetic resin provides flexibility and improves adhesive bonding with the uneven coating layer 8 and waterproof coating 7 of the wall base plate and with mortar. Furthermore, the inclusion of fibers compensates for the brittleness of the joints and prevents the occurrence of cracks. Also, the color of the joint filler 3 can be changed to the uneven coating layer 8 of the wall base plate.
It is a good idea to mix in a coloring agent as appropriate to make it the same color. The composition ratio of the joint filler is as follows.

Boltland cement 100 parts by weight Aggregate (calcium carbonate, silica sand, etc.) Particle size of 0.01-2 mm 100-400 parts by weight Fibrous material (glass fiber, asbestos fiber, synthetic resin fiber, etc.) Fiber diameter 5-30μ, fiber length 3 to 20 mm 0.1 to 10 parts by weight Synthetic resin (rubber latex, vinyl acetate or acrylic resin, etc.) Above mixture 100
1 to 40 parts by weight Water Appropriate amount In the above composition, the aggregate has a particle size of 0.01 to 40 parts by weight.
Within the range of 20mm, more than 50% of which is 0.1~
Preferably, the particle size is in the 1.0 mm range. If the particle size of the aggregate particles is smaller than 0.01 mm, the shrinkage during curing and hardening of the joint compound will depend largely on the cement filled in the aggregate particles, and the shrinkage rate will be large and cracking and peeling will occur easily. . Also, on the contrary, the particle size is 2.0mm.
If it exceeds this, when the joint filler is filled into the narrow V-shaped groove, the adhesive and the base materials 1, 1' will not come into close contact with each other, and it will be difficult to uniformly knead the joint filler. Furthermore, if the amount of aggregate mixed in is less than 100 parts by weight, the shrinkage rate will increase, which is undesirable, and if it exceeds 400 parts by weight, the cement will not fill the voids between the aggregate particles, resulting in a lack of strength of the joint filler. . The fibers may be glass fibers, asbestos fibers, synthetic resin fibers, etc., but alkali-resistant ones are preferred. Fiber diameter is 5
If the fiber length is less than 3 mm, the strength of the fiber itself is weak and the area of close contact between the fiber and the cement is small, so that there is little effect on improving the strength after curing and hardening.
In addition, lumps occur during kneading, reducing workability. On the other hand, if the fiber diameter exceeds 30 μm and the fiber length exceeds 20 mm, the fibers tend to get entangled with each other, making it difficult to knead uniformly and shrinking unevenly, resulting in cracking and peeling. Furthermore, if the amount of fibers mixed is less than 0.1 part by weight, the shrinkage rate of the joint filler will be large, leading to the occurrence of cracks.
If it exceeds the weight part, the strength will decrease due to the small cement ratio. Mixing rubber latex and other synthetic resins lowers the viscosity and increases the viscosity to prevent a decrease in workability, while methyl cellulose (MC) is added to increase water retention to prevent dry out. ) or polyvinyl alcohol (PVA). The amount of this mixture is suitably 0 to 1 part by weight.
The inclusion of MC and PVA, like the inclusion of synthetic resins, gives flexibility to the joint filler and helps prevent cracks from occurring. However, if more than 10 parts by weight is added to 100 parts by weight of cement, the viscosity will increase more than necessary, making it difficult to release air bubbles, and conversely reducing workability. Rubber latex and other synthetic resins also improve the adhesion of the joint filler to the wall base material.
In addition to making the joint filler more flexible, it also improves its adhesion with the topcoat wall material applied over it. If the amount of synthetic resin mixed is less than 1 part by weight, the above effects cannot be obtained, and
If the amount exceeds 1 part by weight, the viscosity will be greatly reduced and the heat resistance will be greatly reduced. Of course, melamine resin, urea resin,
Mixing 5 to 20 parts by weight of a thermosetting resin such as a phenol resin (per 100 parts by weight of the mixture of cement, aggregate, fibers, and thickening water retention agent) helps improve heat resistance. Furthermore, since the joint filler 3 is thicker than the thickness of the uneven coating layer 8 up to the waterproof coating 7 in the wall base material 1, 1', it has a high water absorbency with respect to the wall material applied thereon. Therefore, in order to prevent uneven coating color caused by this, it is also preferable to add 0 to 5 parts by weight of a water stripping agent such as aluminum stearate to the joint agent.

Apply joint compound 3 to wall base plate 1 using a metal trowel, spatula, piece of wood, etc.
It is filled into the V-shaped groove where 1' and 1' meet, and is cured and hardened.

A finishing wall material 4, 4' is applied to the wall base surface treated in this manner.

The wall finish consists of white cement, dolomite plaster and aggregate, synthetic resin, and colorants and other additives. The aggregate contains particles up to about 5 mm in size to provide a lysine scraping finish. In addition, the synthetic resin may be vinyl acetate resin, epoxy resin, etc., and the adhesive strength at the interface with the resin added to the uneven coating layer 8 of the wall base board or the joint filler 3 is due to intermolecular attraction. and improve the flexibility of finishing wall materials. As coloring agents and other additives, methyl cellulose (MC) and polyvinyl alcohol (PVA) are added for viscosity adjustment during work and water retention, or a rapid hardening expansion agent is added. In addition, the above-mentioned respective component ratios are as follows.

White cement 100 parts by weight Dolomite plaster 50 to 500 parts by weight Aggregate (calcium carbonate, silica sand, etc.) Particle size 0.01 to 0.1 mm = A 〃 0.1 to 4.0 mm = B A: B = 0 to 6: 1 to 8 400 ~800 parts by weight Synthetic resin emulsion (vinyl acetate, epoxy resin, etc.) White cement and dolomite plaster with resin content of 2 to 60% by weight
5 to 300 parts by weight per 100 parts by weight Water thickening agent (MC, PVA, etc.) 0 to 10 parts by weight Water (contains 0 to 60% by weight of synthetic resin) Appropriate amount In the above composition, the amount of dolomite plaster If there is a large amount, drying shrinkage increases and cracks are likely to occur, and since the adhesive strength itself is low, strength reduction and peeling are likely to occur, and it may also cause swelling and efflorescence. Therefore, it is preferable that the amount of dolomite plaster be sparsely mixed. In addition, if the aggregate contains particles with a particle size of 4.0 mm or more, it will become rougher when scraping off.
Furthermore, particles with a particle size of 0.01 mm or less cannot be scraped off. Furthermore, if the amount of aggregate mixed is small, not only will the workability of scraping deteriorate, but the overall shrinkage rate will increase, causing cracks and peeling.
On the other hand, if the amount of aggregate mixed in increases, the mixing ratio of cement decreases, resulting in a decrease in strength and adhesion, which is undesirable. Furthermore, the amount in the emulsion of synthetic resin?
If the weight exceeds 40%, the viscosity decreases, which is not preferable.

The finishing wall material with the above composition is 5 to 10 mm
It may be finished with just one coat, but as shown in the figure, first apply it with a trowel to a thickness of 3 to 5 mm, enough to cover the uneven coating layer 8 of the wall baseboards 1, 1' and the joint compound 3. It is best to apply a layer of 3 to 10 mm on top of it immediately, as long as you have enough pressure with your trowel.

Next, it is left to cure for about a day or so, and when it is semi-dry, the surface is finished by scraping it off with a ricin scraper or a wire brush. In addition, if necessary, transparent or semi-transparent acrylic resin may be applied to the surface.
A protective coating 9 may be formed by applying a synthetic resin such as urethane resin to prevent contamination, water absorption and moisture absorption, and cracking due to freezing of water within the composition.

As described above, according to the method of the present invention, the joint sealant adheres well to the uneven coating layer of the wall base plate, and the joint sealant itself is highly flexible and has little shrinkage due to the inclusion of fibers. Therefore, cracking or peeling of the joint filler does not occur, and the water absorption rate of the finishing wall material applied to it is also the same as that of the wall base plate, so uneven finishing does not occur. On the other hand, finishing wall materials are mainly made of cement and contain synthetic resin, so even though they contain aggregates with a large particle size for the ricin scraping finish, they are not suitable for coating the wall base plate. It has good adhesion to membrane layers and joint fillers and is flexible, so
No cracks or peeling occurs. In addition, the addition of a thickening water-retaining agent not only improves workability, but also
It is also effective in improving the adhesiveness and flexibility mentioned above.

Preferred embodiments of this invention are as follows.

Example: After cutting and chamfering the four circumferential surfaces of a 3-ply plywood board with dimensions of 1820 mm x 910 mm x 7.5 mm and bonded with a phenol resin adhesive to the surface, the surface was
MBR was applied and penetrated to form a waterproof film, and then a wall baseboard was produced at a factory by forming an uneven coating layer on top of this waterproof film with a mixture of MBR, cement, and silica sand. This wall base board was attached to the studs and bricks were nailed onto the wall rim to form a wall base. Next, use a metal trowel to fill the joint filler with the following composition into the V-shaped groove of the protruding part of the wall base plate.
It was left to cure for ~3 days.

Composition of joint filler Portland cement: 100 parts by weight Calcium carbonate Particle size: 0.2-2.0 mm (65% with particle size: 0.4-1.0 mm): 200 parts by weight Alkali-resistant glass fiber (fiber diameter: 5-30μ, fiber length: 3-20 mm) )
: 10 parts by weight MC : 3 parts by weight For 100 parts by weight of the above mixture MBR : 30 parts by weight On the wall base that has been treated with the above joints, apply a finishing wall material with the following composition to the surface of the base material. It was applied onto the joint compound to a thickness of about 3 to 4 mm using a metal trowel.

Composition of wall material White cement 100 parts by weight Dolomite plaster 15 parts by weight Calcium carbonate Particle size 0.1 mm or less 200 parts by weight 〃 0.1-4 mm 300 parts by weight Add the following to 100 parts by weight of the above mixture MC 0.01-5 parts by weight PVA 0.01 to 5 parts by weight Rapid curing expansion agent 0.01 to 5 parts by weight Modified EVA resin (50% emulsion) 0.01 to 5 parts by weight Water 20 to 70 parts by weight Immediately after applying the above, apply the same composition to a thickness of 4 to 8
I used a metal trowel to apply layers to a thickness of about mm and left it for several hours. Then, the surface of the finished wall material was scraped off using a scraper to check the water retention, and a lysine scraping finish was performed.

This wall was subjected to a weather resistance test, and as a result, a decorative wall surface with no cracks was obtained.

[Brief explanation of the drawing]

The figure is a partially enlarged sectional view of a mortar wall produced by the method of the present invention. Explanation of symbols, 1... Wall base board, 2... Stud, 3... Joint filler, 4, 4'... Finishing wall material, 5... Plywood, 6
... Chamfered surface, 7... Waterproof coating, 8... Uneven coating layer, 9...
protective coating.

Claims (1)

[Scope of Claims] 1 A resin waterproof coating is formed on the surface of a plate such as plywood or fiberboard, and an uneven coating layer made of a mixture of resin paint and inorganic particles or powder is further formed on top of the waterproof coating. After attaching the wall base board to the pillars, studs, and rim using nails, etc., apply a joint compound containing bolt land cement, synthetic resin, and fiber to the butt part of the wall base board, and then apply a joint compound containing bolt land cement, synthetic resin, and fiber to the entire surface of the wall base board. A method for constructing a decorative wall surface with a scraped-off finish, characterized by applying a top coat wall material containing white cement, synthetic resin, and particulate aggregate to a wall surface, and then performing a scraping finish after watering off the top coat wall material. 2. The method for constructing a decorative wall surface according to claim 1, wherein the top coat wall material has the following composition. White cement 100 parts by weight Dolomite plaster 3 to 500 parts by weight Aggregate (calcium carbonate, silica sand, etc.) Particle size 0.01 to 0.1 mm: 0.1 to 4.0 mm = 0 to 6: 1 to 8 400 to 800 parts by weight Synthetic resin emulsion (Vinyl acetate, epoxy resin, etc.) Resin content 2-60% by weight Per 100 parts by weight of white cement and dolomite plaster 5-30 parts by weight Water thickening agent (MC, PVA, etc.) 0-10 by weight Part Water (contains 0 to 60% by weight of synthetic resin) Appropriate amount 3 The method for constructing a decorative wall surface according to claim 1 or 2, wherein the joint filler has the following composition. Boltland cement 100 parts by weight Aggregate (calcium carbonate, silica sand, etc.) Particle size 0.01 to 2 mm (0.1 to 1.0 mm)
50% or more) 100-400 parts by weight Fibers (glass fibers, asbestos fibers, synthetic resin fibers, etc.) Fiber diameter 5-30μ, fiber length 3-20mm
0.1 to 10 parts by weight Thickening water retention agent (MC, PVA, etc.) 0 to 10 parts by weight Synthetic resin (rubber latex, vinyl acetate or acrylic resin, etc.) (As an emulsion with a resin content of 50%) Per 100 parts by weight of the above mixture hand
1 to 40 parts by weight Water (when powdered synthetic resin is used) Appropriate amount 4 The decorative wall surface according to claim 3, wherein white cement is used in place of Boltland cement as the joint filler and colored if necessary. construction method.