JPS6032581B2 - Manufacturing method of base material for construction - Google Patents

Description

[Detailed Description of the Invention] The present invention involves surface-treating a wood-based plate-like base material to promote hardening of cement, then applying a synthetic resin paint, and then applying and hardening a cement-based mixture. This relates to the manufacturing method of base materials for construction.

Traditionally, this type of base material has been manufactured by applying a synthetic resin adhesive solution, emuldimon, latex, polyvinyl alcohol, methylcellulose, or a stiffened rubber solution to the surface of a wood-based board such as plywood, particle board, flake board, or hardboard. The adhesion between the wooden plate and the cement mixture is achieved by applying a resin paint such as It worked to prevent cement hardening inhibition due to elution of cement hardening inhibiting components into the cement slurry. However, according to the above method, in the case of wood containing a large amount of hardening-inhibiting components, the hardening-inhibiting components in the wood seep out into the applied adhesive or paint, and the coating becomes a hardening-inhibiting substance. There are problems such as defects in the paint film due to contamination, foaming during film formation, or coating spots, and it is impossible to completely adjust the amount of adhesive or paint applied. In particular, in the case of wood that contains a large amount of components that inhibit cement hardening, abnormalities such as poor hardening and discoloration of the applied cement mixture are often observed, making it difficult to use as a building material. In reality, it has been difficult to economically obtain composite plates with suitable strength and appearance. In addition, in the case of concrete panels made of plywood, conventional techniques for preventing the inhibition of cement hardening due to wood extracted components include overlaying the surface with impregnated paper or painting the surface with urethane resin paint, etc. There existed techniques such as covering the plywood with a film-like material, applying an alkaline solution to the plywood surface, or applying a cement hardening accelerator.

However, all of these techniques are used to improve the surface finish of cured concrete that comes into contact with wooden panels, or to increase the number of uses (life) of wooden concrete panels. Even when using the above method, it was difficult to manufacture a base material in which the wood-based substrate and the cement-based mixture of the present invention were firmly integrated.

The present invention is directed to solutions containing cement hardening accelerators such as magnesium chloride, calcium chloride, sodium sulfate, and triethanolamine; solutions containing quick setting agents such as sodium silicate, soda carbonate, and sodium aluminate; hardening accelerators and/or or a filler containing an adhesive; pre-coat the surface of the wooden board with a treatment agent selected from After applying a single or a mixture of synthetic resins such as rubber latex, synthetic resin emulsion, and green emulsion and drying, cement such as mortar cement paste, fiber mixed cement paste, foam mixed cement paste, etc. is applied as a binder. This relates to a method for producing a building base material obtained by applying and solidifying a cement-based mixture.

Next, the present invention will be explained in detail.

There is currently no established theoretical explanation for the mechanism by which cement hardening is inhibited by alkaline extracts from wood.
Generally, the following reaction process is assumed.

That is, the liquid phase of cement paste or mortar contains Ca.
Since ions such as 20, K0, Na, S02-/4, and OH- are present and the pH is quite high, alkaline lacquer substances are eluted from the wood surface in contact and transferred into the cement slurry. . Various substances can be considered to be ejected at this time, such as cellulose, hemicellulose, lignin, pigments, resins, and wax, but among these eluted substances, Ca20, K+
It is said that substances that adsorb alkali and alkali metal ions such as Na, Na, etc., or form salts with them, are the main cause of poor curing. The present invention uses a cement hardening accelerator or quick-setting agent to rapidly feed cement before these hardening-inhibiting components leak into the cement slurry and affect the cement slurry near the interface with the wooden board. A manufacturing method for economically obtaining a laminate of a wood board and a cement board using a wood board board containing a relatively large amount of a cement hardening inhibitor. It is related to. To explain the present invention with drawings, Fig. 1 is a cross-sectional view of a building base material according to the present invention, and Fig. 2 is a perspective view of the same, in which 1 is a wooden plate-like base material, and 2 is a cement magnetization promoter. 3 is a synthetic resin adhesive or paint layer; 4 is a cement binding material; 5 is a lightweight aggregate; and 6 is a composite layer.

Examples of wood species that contain a large amount of cement hardening inhibiting components are South Sea wood such as Merapi, Mangasinoro, Merwasa, /f Rosapis, /ゞUra, and Resaku; North American wood such as Japanese cedar; and Japanese oak. , Kiri, Keyaki, Akamatsu, etc.; there are many. In addition, tree species with a relatively low content of cement hardening inhibiting components are South Sea wood such as Shidwaran, Apitong, Yellow Seraya, and Tanguir.
North American materials include beshi, hi, beitsu, etc.
Beimatsu, Beihiba, etc.: Examples of Japanese materials include Nire, Nara, Katsura, Japanese fir, Karamatsu, Totatsu, Ezomatsu, etc., but the present invention uses a large amount of the former cement hardening inhibiting component. A particularly large effect can be obtained in the case of village types that are included in

As the wood base material used in the present invention, plywood, particle board, hardboard, flake board, or composite boards such as these are used.

Apply a solution containing a cement hardening accelerator such as magnesium chloride, calcium chloride, triethylamine, or a cement quick-setting agent such as sodium silicate or sodium aluminate, or a sealant to the surface of the wooden substrate. After performing drying treatment, surface polishing treatment, etc. as necessary, synthetic resin paints or synthetic resin adhesives made of synthetic rubber latex, synthetic resin emulsions, high-temperature emulsions, or mixtures thereof, or the like, are inorganic. Material particles or powders (talc, laurel, etc.), singly or in combination, are applied. After that, after an appropriate drying process, a cement slurry-based coating material consisting of cement paste, cement mortar, glass fiber mixed cement, lightweight aggregate mixed cement, foamed mixed cement, or a mixture of several of these is applied. A curing period is provided.

The wood-cement laminated product obtained by the above method has no problems such as insufficient strength due to poor hardening of the cement near the interface with the wood, and the cement-based coating is firmly integrated on the surface of the wood substrate. It has sufficient strength as a member.

Next, a more specific explanation will be given with reference to examples.

Example 1 20% (
wt%) Calcium chloride solution was applied in an amount of 180 tano,
Dry at 800°C for 5 minutes, then coat with acrylic emulsion (40% solids) using a roll coater at 250°C.
After applying a suitable amount and drying at 8000 for 5 minutes, cement mortar (sand/cement = 3/1, flow value = 180)
was evenly sprayed using a continuous ricing gun to a thickness of 5 skins, and allowed to cure for one week. The obtained wood-cement composite board was suitable as a base material for construction. Example 2 20% abrasive powder, 5% calcium chloride, and 1 part sodium silicate by weight on 3-ply antiseptic and insect-proof treated plywood (wood type Resaku)
0%, 40% silica, 10% synthetic emulsion resin, and 15% water.
The filler was applied in an amount of 0.00 m/ml, embedded in the conduit groove with a reverse roll, and the excess sealant was scraped off with a straight blade.

Thereafter, it was dried and polished with a sander and buff roll. Next, a mixture consisting of 50% SBR latex (solid content 40%) and 50% talc by weight was applied using a roll coater in an amount of 400 ml/day, dried for 10 minutes, and then Bortland cement 60% by weight was coated on top of the mixture. %, glass fiber 3%, lightweight perlite 2%, and water 35% was applied to a thickness of 5 cm using a grooved roll coater and allowed to cure for one week. The obtained wood/cement composite board was suitable as a base material for construction.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of the building material of the present invention, and FIG. 2 is a perspective view thereof. In the figure, 1...wood plate-like base material, 2...cement hardening accelerator or filler containing quick-setting agent,...synthetic resin adhesive or paint layer, 4...cement binding material, 5...・Lightweight aggregate, 6
...Composite layer. Figure 1 Figure 2

Claims (1)

[Scope of Claims] 1. After applying a paint treatment to the surface of a wood base material to promote hardening of cement, one of a synthetic resin adhesive solution, synthetic rubber latex, synthetic resin emulsion, and bituminous emulsion is applied. A method for manufacturing a base material for construction, which comprises applying the synthetic resin paint as described above, and then applying and solidifying a cementitious mixture comprising cement as a binder. 2. The method for producing a base material for construction according to claim 1, wherein the surface treatment coating for the wood base material is a solution containing a cement hardening accelerator. 3. The method for producing a base material for construction according to claim 1, wherein the surface treatment coating for the wood base material is a solution containing a cement quick-setting agent. 4. The method for producing a base material for construction according to claim 1, wherein the surface treatment coating for the wood base material is a filler containing a cement hardening accelerator. 5. The method for producing a base material for construction according to claim 1, wherein the surface treatment coating for the wood base material is a filler containing a cement quick-setting agent. 6. Any one of claims 1 to 5, wherein the cement mixture is a mortar/cement pestest.
Method for manufacturing composite boards for construction as described in Section 1. 7. The method for manufacturing a composite board for construction according to any one of claims 1 to 5, wherein the cement mixture is a fiber-mixed cement paste. 8. The method for manufacturing a composite board for construction according to any one of claims 1 to 5, wherein the cement mixture is a foam-mixed cement paste.