JPS6133948B2 - - Google Patents

Description

Detailed Description of the Invention This invention applies mortar once on a wall base using a special wall base board, and patterns are created on the surface of this mortar using a roller with pattern-like unevenness formed thereon. The present invention relates to a method for constructing a decorative wall surface in which a finishing step is performed.

The wall base in this invention can be used in place of the conventional construction methods of lath underboarding, asphalt felt covering, and lath netting, and the process up to wall undercoating on top of these, or the process up to wall inner coating. Instead, wall baseboards with an uneven coating layer made of a mixture of resin paint, inorganic particles, and powder on the surface of plate-like materials such as plywood and fiberboard are applied to the interior and exterior walls of buildings. It is the base.

In order to apply mortar on such a wall base plate to form a decorative wall surface 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 lower board was pasted on the studs, rims, etc., and asphalt felt and lath netting were stretched on top of the lath netting. It was applied into the undercoat layer, an intermediate 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 clasp, and 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 particles and powder, which fully adheres to the substrate and coats the surface. A wall base plate with an uneven coating layer is installed on wood or metal studs,
Proposals have been made to simplify the construction by nailing, bolting, or attaching the wall to the rim or pillar, and then applying wall material to the wall.

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 of the wall base plate, the conventional undercoating work and its curing period can be reduced. It is not necessary, and it is preferable because it significantly saves the labor of forming the wall and shortens the construction period.

However, there are generally many dry cracks, especially along the joints of the wall baseboard, where corner cracks occur. Unlike hair cracks, cracks that occur at these connections do not have a waterproof layer beneath them. Therefore, rainwater may enter between the surface of the wall base plate and the painted wall material, or it may moisten the wall base plate, causing the watery part to expand, causing the painted wall to peel off, or causing the wall base plate to become damaged. There are disadvantages such as corrosion of the pillars and the like. Therefore,
The structure of the wall base board itself is such that a waterproof resin film 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 peeling by increasing the trowel pressure, you will end up finishing with a thin coat.
The joint sealant part can be seen through from the surface, and due to the difference in water absorption between the wall base plate and the joint sealant part, variations in curing occur, and dark circles of different colors appear on the wall surface, making it impractical. In addition, if two coats of intermediate coat and top coat are applied to prevent this, there is a curing period for the intermediate coat, which not only makes it impossible to efficiently shorten the construction period, but also tends to cause dry cracking due to thick coating. .

Therefore, the present invention uses a mortar wall material on a wall base using the above-mentioned wall base board, and also provides a decorative wall surface in a manner that prevents cracking, peeling, uneven finish, etc. The purpose is to provide a method for construction with one finishing coat.

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 filler, almost the same as the uneven coating layer on the wall base board. 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 as a finishing 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' have a chamfered surface 6 of 30 to 60 degrees formed on the surface periphery of a 7.5 mm structural plate 5, and the surface is made of butadiene acrylonitrile rubber (NBR), butadiene styrene rubber (SBR), A rubber latex such as methyl butadiene methacrylate rubber (MBR) is applied and dried to form a waterproof coating 7, 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. This is a wall base plate produced in a factory where a textured coating layer 8 is formed. Of course,
In place 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. A joint treatment is performed by filling a joint material 3 into a Y-shaped groove formed by each chamfered surface 6 at the joint between the wall base plates 1 and 1'.

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.
Further, in order to make the color of the joint filler 3 the same as that of the uneven coating layer 8 of the wall base plate, it is preferable to mix a coloring agent as appropriate. Incidentally, the above-mentioned component ratios of the joint filler are as follows.

Portland cement 100 parts by weight Aggregate (calcium carbonate, silica sand, etc.) 100 to 400 parts by weight of particles with a particle size of 0.01 to 2.0 mm Fibers (glass fiber, asbestos fiber, synthetic resin fiber, etc.) Fiber diameter 5 to 30μ, fiber length 3-20mm
0.1 to 10 parts by weight Synthetic resin (rubber latex, vinyl acetate or acrylic resin, etc.) (as an emulsion with a resin content of 50%) For 100 parts by weight of the above mixture
10 to 40 parts by weight Water (when using powdered synthetic resin) Appropriate amount In the above composition, the aggregate has a particle size of 0.01 to
Within the range of 2.0mm, 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 0.01 mm or less, the shrinkage during curing of the joint compound will depend largely on the cement filled in the aggregate particles, and the shrinkage rate will be large, making cracking and peeling more likely. On the other hand, if the particle size is 20 mm or more, when filling the joint compound into a narrow V-shaped groove,
The adhesion between the joint filler and the base coat 1, 1' becomes poor,
Furthermore, it becomes 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.
Alkali-resistant ones are preferred. If the fiber diameter is less than 5 μm and the fiber length is less than 3 mm, the strength of the fibers themselves will be weak and the area of adhesion between the fibers and the cement will be small, resulting in little effect on improving the strength after curing and hardening. or,
Clumps also 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 become entangled, making uniform kneading difficult and causing uneven shrinkage, which tends to cause 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. By mixing rubber latex and other synthetic resins, the viscosity decreases, and in order to prevent a decrease in workability, the viscosity is increased, and on the other hand, 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 10 parts by weight.
The addition of MC and PVA, along with the addition of synthetic resin, 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. In addition, rubber latex and other synthetic resins improve the adhesion of the joint filler to the wall base material, make the joint filler flexible, and improve the adhesion with the topcoat wall material applied thereon. The amount of synthetic resin mixed is 1
If the amount is less than 40 parts by weight, the above effects cannot be obtained, and if it exceeds 40 parts by weight, the viscosity will be greatly reduced and the heat resistance will be greatly reduced. Of course, 5 to 20 parts by weight of thermosetting resin such as melamine resin, urea resin, phenol resin (mixture of cement, aggregate, fibers, thickening water retention agent)
(per 100 parts by weight) helps improve heat resistance.

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 surface treated in this manner.

The finishing wall material consists of white cement, dolomite plaster, aggregate, fibers, synthetic resin, coloring agent and other additives. Aggregate is used to create an uneven pattern finish on the wall surface.
Limited to particles up to 2mm in size. The fibers may be glass fibers, asbestos fibers, synthetic fibers, etc., but are preferably alkali-resistant, and their inclusion limits the shrinkage of the wall material after application and prevents the occurrence of cracks. In addition, the synthetic resin may be vinyl acetate resin, epoxy resin, etc., and has an adhesion force at the interface due to intermolecular attraction with the uneven coating layer 8 of the wall base board or the resin added in the joint filler 3. Improves the flexibility of finishing coats and wall materials. As coloring agents and other additives, methyl cellulose (MC) and polyvinyl alcohol (PVA) are added for water retention to adjust viscosity during work, or a rapid hardening and expanding agent is added. In addition, the above-mentioned respective component ratios are as follows.

White cement 100 parts by weight Dolomite plaster 3 to 200 parts by weight Aggregate (calcium carbonate, silica sand, etc.) Particle size of 2 mm or less 50 to 600 parts by weight Fibers (glass fiber, asbestos fiber, synthetic fiber, etc.) Fiber diameter 5 to 30μ , with fiber length of 3 to 20 mm 0.005 to 20 parts by weight Viscous water retention agent (MC, PVA, etc.) 0.001 to 1 part by weight Synthetic resin (vinyl acetate, epoxy resin, etc.) (as an emulsion with a resin content of 50%) Above For 100 parts by weight of mixture
0.01 to 1 part by weight Water Appropriate amount In the above composition, if the amount of aggregate mixed is less than 50 parts by weight, the overall shrinkage rate will increase and cause cracks and peeling. On the other hand, the amount of aggregate mixed in is 600
If the amount exceeds 1 part by weight, the mixing ratio of cement decreases and the spaces between the aggregate particles are not sufficiently filled with cement, resulting in a decrease in strength and adhesion, which is not preferable. If the fiber diameter is 5 μm or less and the fiber length is 3 mm or less, the strength of the fiber itself is weak, and the adhesion area between the fiber and cement is small, making it less effective in improving strength after curing and hardening. Clumps are likely to form and dispersion is not uniform. Conversely, the fiber diameter of textiles
If the fiber length is 30 μm or more and the fiber length is 20 mm or more, the fibers tend to get entangled and the kneading becomes uneven, and the fibers tend to appear on the wall surface or shrink uniformly, causing cracks to occur. Furthermore, if the amount of fibers mixed is less than 0.005 parts by weight, the shrinkage rate will be large and cause cracking or peeling, whereas if it exceeds 20 parts by weight, workability will be lowered or the ratio of cement will decrease, making it difficult to mix fibers. The strength of the wall decreases because it cannot be wrapped sufficiently with cement. MC or PVA as thickening water retention agent
By adding a total amount of 10 parts by weight or less, the viscosity is increased, which improves workability during coating, increases water retention, and prevents peeling due to decrease in solidification adhesion due to drive-out after coating. Further, if the amount exceeds 10 parts by weight, the release of bubbles will be poor and workability will be lowered or curing will be delayed, which is undesirable. In addition to the above composition, a rapid hardening expansion agent and a coloring agent are appropriately mixed. The rapid hardening expansion agent has the same effect as the AE agent, forming countless independent fine bubbles with a diameter of 10 to 1000μ in the coated wall, reducing curing shrinkage and preventing cracks due to shrinkage. Therefore, it is possible to use an AE agent, but care must be taken as excessive generation of bubbles will reduce the strength of the wall.

As shown in the figure, the finishing wall material having the above composition is first applied with a trowel to a thickness of 3 to 5 mm, enough to cover the uneven coating layer 8 and the joint filler 3 of the wall base plates 1 and 1', and then immediately It is best to apply 3 to 10 mm of additional paint over the area, as this will apply sufficient trowel pressure and will not leave any air bubbles, improving adhesion. However, curing may be performed after the first coat and before recoating, but in this case dry-out is likely to occur in the first coat, so countermeasures such as increasing the amount of synthetic resin in the water retention agent are recommended. is necessary.

After the topcoat wall material is applied, a roller with pattern-like irregularities is brought into contact with the surface of the wall material and rolled to create a pattern. Of course, the surface of the protrusion may be flattened with a trowel to give a stucco finish. If necessary, transparent or semi-transparent synthetic resin such as acrylic resin or urethane resin may be applied to the surface to prevent contamination, water absorption and moisture absorption, and prevent cracking due to moisture freezing within the composition. A coating 9 may also be formed.

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 shrinks due to the mixture of synthetic resin and fibers. Since there is less cracking or peeling of the joint filler, 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 fibers and synthetic resins, so they have good adhesion to the paint layer of the wall base board and joint filler, are flexible, and do not cause cracks. No generation or peeling occurs. Further, the addition of a thickening water-retaining agent not only improves workability but also is effective in improving the adhesiveness and flexibility.

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 and fixed to the brickwork by nailing onto the studs and rim to form the 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 Boltland 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 Alkali-resistant glass fiber (fiber diameter 5-30 μ, fiber length 3- 20mm) : 10 parts by weight MC : 3 parts by weight For 100 parts by weight of the above mixture MBR (50% emulsion) : 30 parts by weight A finish consisting of the following composition is applied to the wall base that has undergone the above joint treatment. The wall paint was applied onto the surface of the base material and the joint filler using a metal trowel to the extent that these convex portions were covered.

Composition of wall material White cement: 100 parts by weight Dolomite plaster 15 parts by weight Hakuryuite Particle size 20 mm or less: 400 parts by weight Polypropylene Fiber diameter 5-30μ, fiber length 3-20 mm: 1 part by weight MC (50% emulsion): 3 parts by weight parts PVA: 3 parts by weight Rapid curing expansion agent: 3 parts by weight Modified EVA (ethylene vinyl acetate copolymer)
: 3 parts by weight Water : 250 parts by weight Immediately after applying the above, apply the same composition to a thickness of 6 to 7.
I used a metal trowel to apply layers to about mm. and,
Immediately thereafter, while the wall material was still in a dry state, a pattern roller made of a porous material having pattern-like irregularities was pressed against it to give it a pattern. After leaving it for 30 minutes to 1 hour, the condition of the surface was checked and a smooth surface roller was used to press the top and give it a stucco finish.

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-shaped body 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 the coating. After attaching the wall baseboard to the columns, studs, and rim using nails, etc., apply a joint compound containing bolt land cement, synthetic resin, and fibers to the butting parts of the wall baseboard, and then white cement on the surface,
A decorative wall surface characterized by applying a top coat wall material containing a synthetic resin, particulate aggregate and fibers, and subsequently applying a pattern to the top wall material coating using a roller having pattern-like unevenness formed thereon. Construction method. 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 200 parts by weight Aggregate (calcium carbonate, silica sand, etc.) Particle size of 2 mm or less 50 to 600 parts by weight Fibers (glass fiber, asbestos fiber, synthetic resin fiber, etc.) Fiber diameter 5 to 600 parts by weight 30 μ, fiber length 3 to 20 mm 0.005 to 20 parts by weight Thickening water retention agent (MC, PVA, etc.) 0.001 to 10 parts by weight Synthetic resin (vinyl acetate, epoxy resin, etc.) (As an emulsion with a resin content of 50%) ) Based on 100 parts by weight of the above mixture
0.01 to 10 parts by weight Water 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. Portland cement 100 parts by weight Aggregate (calcium carbonate, silica sand, etc.) Particle size 0.01-2 mm 100-400 parts by weight Fibers (glass fiber, asbestos fiber, synthetic resin fiber, etc.) Fiber diameter 5-30 μ, fiber length 3- 20mm one
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%) For 1.00 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 method for constructing a decorative wall surface according to claim 3, wherein white cement is used as the portland cement of the joint agent and coloring is applied if necessary.