JPH0323333B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention provides a wall having a hardened layer of a hydraulic composition mainly made of granulated blast furnace slag, slag, portland cement, synthetic resin emulsion, or rubber latex on a wooden board with a waterproof layer formed on one or both sides. This is a base material and its manufacturing method, and its purpose is to be useful as a base material for mortar painting, spray painting, tiling, etc. of building structures, and to be suitable for use when nailing pillars, etc. It is easy to apply mortar coating, spray coating, and tiling, and when doing so, the adhesion between the base material and mortar or tile is good and there is no occurrence of cracks.
The object of the present invention is to provide a wall base material having excellent properties such as excellent waterproofness, and a method for manufacturing the same. Traditionally, when applying mortar coating or tiling to the exterior and interior walls of wooden buildings, etc.
Waterproof paper is placed on top of the lumber, and metal lath is nailed or stapled onto the base. Mortar is applied in the order of base coat, intermediate coat, and top coat.
Then, after applying a finishing coat or applying a rough coat of mortar, the tiles are attached using cement or adhesive. In addition, in the case of spray painting, it is common for wooden buildings to be finished by applying mortar and then spray painting on top of that. Since these foundation works are carried out on construction sites, they have drawbacks such as difficulty in selecting homogeneous materials and the need for a large amount of manpower and construction time. Also. In these construction methods, cracks occur in the mortar due to compaction as the mortar dries and hardens, and as a result of warping of lumber. Cracks that occur are aesthetically undesirable, cause rainwater to leak, stain the interior, and cause rot in pillars, wood chips, etc. In addition, in recent years, methods have been seen in which wooden boards are coated with asphalt-based materials or synthetic resin emulsions mixed with aggregate and used as wall base materials, but these have poor mortar paintability and adhesion. It has a major disadvantage in that it has low strength against heat and the mortar may peel off. In addition, wall base materials with a paint layer made of cement and synthetic resin emulsion, or a paint layer with sand, crushed stone, and synthetic resin foam added to these (Japanese Patent Application Laid-Open No. 57-178064, JP-A No. 50-104283, JP-A No. 50-104283, 55-30049, Japanese Utility Model Application Publication No. 55-172535), there are drawbacks such as poor cutting workability during construction, and the adhesive force of mortar varies and is sometimes extremely weak. This is particularly noticeable when the cement is exposed to high temperature and humidity, when it is cured by spraying water, or when it gets wet with rainwater after hardening of the cement. Therefore, ordinary cement mortar is rarely used for these wall base materials. When the Portland cement used in the base material hardens by hydration, a large amount of calcium hydroxide or calcium carbonate produced when it is neutralized precipitates on the surface of the base material as efflorescence. It is also believed that efflorescence directly or indirectly reduces the adhesion of mortar applied thereon. Various other attempts have been made, including those based on synthetic resin foam and those based on inorganic materials, but none of them are optimal as wall base materials and are used despite some drawbacks. Granulated blast furnace slag is obtained by pulverizing blast furnace slag, which is produced as a by-product in the blast furnace during pig iron production, and has latent hydraulic properties, with remarkable hardening properties in the presence of alkaline stimulation. In addition, granulated blast furnace slag reacts with slag to produce ettrin guide. Therefore, granulated blast furnace slag has been used as blast furnace cement and high sulfate cement by taking advantage of its reactivity. Recently, attempts have been made to mix granulated blast furnace slag and slag-based compositions with alkaline irritating substances, fibers, fillers, etc., form paper or mold the mixture, and use it as an inorganic molded plate. Although these molded plates have excellent properties such as low curing shrinkage and low surface alkalinity, they also have drawbacks such as low initial strength and reduced surface strength. In view of the above, the present inventors have discovered that the shortcomings of conventional cement and synthetic resin emulsion paints, that is, the decrease in adhesion with mortar, is due to calcium hydroxide generated by hydration of cement.
On the other hand, paying attention to the fact that granulated blast furnace slag and Setsukou-based compositions are hydraulic compositions with low alkalinity,
We considered this material to be suitable as a wall base material. As a result, by applying a hardened material layer made of a specific hydraulic composition whose main raw material is granulated blast furnace slag, slag, portland cement, synthetic resin emulsion, or rubber latex to the wooden board on which the waterproof layer has been formed, It is easy to construct,
It has properties such as good adhesion with finishing materials such as mortar and spraying materials, does not cause cracks, and has excellent waterproof properties, and is used for mortar painting, spray painting, tiling, etc. of architectural structures. The present invention was based on the knowledge that a wall base material useful as a base material for cases was obtained, and that the wall base material had particularly good adhesion to mortar. That is,
The present invention has the following features: (1) A wooden board has a waterproof layer on one or both sides, and on the waterproof layer, 70 to 95 ml of granulated blast furnace slag is added.
% by weight, a mixture consisting of 5-30% by weight of cetaceans
10 to 75 parts by weight of Portland cement
100 parts by weight of slag, slag, and cement-based materials;
A wall base comprising a cured layer of a hydraulic composition consisting of a synthetic resin emulsion or rubber latex in a solid content of 2 to 50 parts by weight, water, and if necessary a setting regulator and aggregate. (2) A waterproof layer is formed on one or both sides of the wood board, and on top of the waterproof layer, a mixture of 70 to 95% by weight of granulated blast furnace slag and 5 to 30% by weight of slag is applied to 100 parts by weight of the wood board. , slag, slag, and cement material made by adding 10 to 75 parts by weight of Portland cement;
A hydraulic composition obtained by mixing 2 to 50 parts by weight of a synthetic resin emulsion or rubber latex in terms of solid content with respect to 100 parts by weight of the slag, slag, or cement material, and water and, if necessary, a setting modifier and aggregate. The present invention relates to a method for producing a wall base material, which comprises curing after coating a slurry, or curing by replenishing moisture after drying. The feature of the present invention is that by using a slag, slag, and cement mixed material that does not generate efflorescence due to hydration reaction, the synthetic resin can reduce the surface strength of the cured product of the slag, slag, and cement mixed material. This is achieved by combining with emulsion and rubber latex to improve and stabilize the adhesion strength of mortar. Next, the present invention will be explained in detail. When wood boards come into contact with water, they easily absorb water, which causes dimensional changes. Also, depending on the material, it may cause warping or twisting, which is undesirable from the viewpoint of material strength and decay. Therefore, it is very important to protect wooden boards from water in some way. The wood boards used in the present invention, such as plywood, particle board, fiber board, wood wool cement board, and wood chip cement board, may be coated with emulsion, latex, or solution of synthetic resin, rubber, bitumen, etc. on one or both sides, or A waterproof layer is formed by bonding films or sheets made of synthetic resin, rubber, bitumen, etc. either as they are or with an adhesive. A waterproof layer composited with non-woven fabric, or filled with sand, fibers, etc., can also be used, and any method that is normally called waterproofing can be applied. however,
In the present invention, since the waterproof property does not depend only on the waterproof layer, the waterproof layer does not necessarily have to be strong enough to completely block water. In addition, this waterproof layer not only protects the wooden board from water, but also has the effect of reinforcing the surface of the wooden board and preventing water damage. The waterproof layer may be formed not only on the front surface but also on the side and back surfaces. Preservative and insect repellent for wooden boards.
Anti-termite and fire-treated materials can also be used. The wall base material of the present invention has granulated blast furnace slag, slag, portland cement, etc. on top of its waterproof layer.
Synthetic resin emulsion or rubber latex,
It has a layer of a cured product of a hydraulic composition consisting of water, a setting regulator if necessary, and an aggregate, and after coating a slurry of the hydraulic composition, it is cured and cured. As mentioned above, granulated blast furnace slag is obtained by pulverizing blast furnace slag, which is produced as a by-product in a blast furnace during pig iron production, and is in the form of a fine powder. The slag used by mixing with the granulated blast furnace slag may be any of dihydric slag, semi-hydrous slag, and anhydrous slag. Portland cement includes ordinary Portland cement, early-strength Portland cement, and white Portland cement.
Blast furnace cement and high sulfate cement can also be used as components of granulated blast furnace slag, Portland cement, etc. Their mixing ratio is 70 to 95 granulated blast furnace slag.
% by weight, a mixture consisting of 5-30% by weight of cetaceans
10 to 75 parts by weight of Portland cement
Parts by weight. Granulated blast furnace slag has self-hardening properties due to the alkaline stimulant, but when slag coexists with it, it hardens by producing ettringite. Portland cement produces Ca(OH) ₂ when hydrated, so it acts as an alkaline stimulant and has hydraulic properties itself, which strengthens the composition layer. Therefore,
If the ratio of slag to the granulated blast furnace slag is less than 5% by weight, the amount of ettringite produced will be small, the hardening reaction of the slag will be slow, and the development of initial strength will also be delayed, which is not good. If the amount of slag is more than 30% by weight, the amount of remaining unreacted sludge increases, resulting in poor water resistance. In addition, since an excessive amount of glue reacts with cement and causes expansion, which is undesirable, the amount of glue needs to be 30% by weight or less. This is more preferable also from the viewpoint of water resistance. portland cement is 3
If the amount is less than 1 part by weight, the amount of alkali produced will be small, and the effect as an alkali stimulant on granulated blast furnace slag will be reduced. In reality, Ca(OH) ₂ produced by the hydration of Portland cement is consumed to produce ettringite, and the surface of the hydraulic composition is neutralized by carbon dioxide gas in the air and becomes neutral. The reason for this is that the hydration rate of the hydraulic composition of the present invention is somewhat slow because it contains synthetic resin emulsion and rubber latex as components.
A larger amount of alkaline stimulant is required than in ordinary slag and slag compositions, and for these reasons, the amount of Portland cement is required to be 10 parts by weight or more. When Portland cement is used in excess, alkalinity increases due to the excess free Ca(OH) ₂ produced. This excess free Ca (OH) ₂ migrates to the surface and causes efflorescence, which causes a decrease in the adhesive force with mortar, making the adhesive strength unstable and sometimes extremely weak. This causes strength to vary. Another drawback is that when excessive free Ca(OH) ₂ exists, ettringite, which is rapidly generated, densely covers the slag surface, suppressing the reaction of the slag. For these reasons, the amount of Portland cement must be 75 parts by weight or less per 100 parts by weight of the mixture consisting of granulated blast furnace slag and slag. Incidentally, this efflorescence phenomenon becomes more noticeable when watering and drying are repeated, such as when the product gets wet with rainwater after manufacturing, and it is an extremely inconvenient problem in practice, as it reduces the adhesive force with mortar. Examples of the synthetic resin emulsion and rubber latex according to the present invention include aliphatic carboxylic acid vinyl esters, acrylics or their esters, methacrylic acid or its esters, vinyl chloride, vinylidene chloride, styrene, olefins, butadiene, chlorobrene, acrylonitrile, etc. Examples include emulsified polymers made of one or more polymerizable monomers dispersed in water. When used, one or more types of synthetic resin emulsion and rubber latex may be used. Furthermore, these may be modified by crosslinking or modified by thermosetting resins such as polyurethane and epoxy resins. The effect of these synthetic resin emulsions and rubber latexes is not only to strengthen the entire hydraulic composition layer according to the present invention, but also to prevent a decrease in surface strength, which is the biggest drawback of slag and slag-based cured products. This reinforcement of the surface area is promoted by the transfer of the synthetic resin emulsion and rubber latex to the surface during the drying process. This reinforcing effect on the surface area is a major feature of the present invention, which does not need to be considered in conventional cement or synthetic resin emulsion paints due to their high surface strength. The decrease in surface strength of slag and slag-based cured products occurs because the surface layer is neutralized by carbon dioxide gas in the air, which prevents curing from proceeding. In the case of molded products, this problem is solved by some kind of reinforcement such as sealer treatment at the stage of secondary processing, but in the present invention, considering the purpose of use, it is necessary to take some kind of reinforcement afterwards. Taking this approach is not desirable from the standpoint of increasing the number of steps and construction costs. Therefore, in the present invention, the synthetic resin emulsion and rubber latex are essential components, and are extremely practical in that the surface can be reinforced in one step by mixing them with slag, slag, and cement-based materials. In addition, it has the effect of imparting flexibility and waterproofness to the cured material layer, and increasing the adhesive strength with the waterproof layer and with finishing materials such as mortar. The mixing ratio of these synthetic resin emulsions and rubber latex is 2 to 50% by weight in terms of solid content, based on granulated blast furnace slag, slag, and Portland cement.
If it is less than 50% by weight, the strength of the entire hydraulic composition layer and the reinforcing effect of the surface area will be insufficient.
If the amount exceeds the amount, the water absorbency of the composition layer decreases, resulting in poor mortar application workability, which is not good. A setting modifier in the hydraulic slurry according to the present invention,
For example, aluminum sulfate, alum, sodium sulfate, potassium sulfate, aluminum chloride, barium chloride, calcium chloride, sodium chloride, potassium chloride, sodium silicate, potassium silicate,
Sodium carbonate, potassium carbonate, caustic soda, caustic potassium, calcium hydroxide, etc. may be added and the coagulation time may be adjusted as appropriate. Also,
As aggregates, for example, inorganic lightweight aggregates such as perlite, shirasu balloons, foamed glass balls, vermiculite, calcined pumice, artificial lightweight bodies, foamed plastic particles,
By mixing silica sand, kansui stone, crushed slag stone, etc., it is possible to make the composite material have a wide range of properties, such as reducing the weight and considering the ease of application and construction of mortar and finishing materials. Fibers can be mixed into the hydraulic slurry according to the present invention in order to reinforce the cured material layer or improve adhesiveness. In this case, the fibers include inorganic fibers such as asbestos, rock wool, glass fiber, and slag wool, natural fibers, and synthetic fibers such as cotton, pulp, polyethylene, polypropylene, polyvinyl alcohol, polyester, and nylon. Furthermore, by mixing a thickener, the hydraulic slurry can be given an appropriate viscosity and the workability of applying it to wooden boards can be improved. Examples of thickeners include polyvinyl alcohol, methyl cellulose, hydroxyethyl cellulose, cellulose derivatives such as carboxylated cellulose and their alkali salts, silica, bentonite, and the like.
In addition, dispersants such as alkyl sulfonates and melamine formalin resin sulfonates, foaming agents, colorants, fillers, antifoaming agents, and the like may be added. Next, the method of mixing the hydraulic composition is not uniquely defined, but to give one example, a synthetic resin emulsion, rubber latex, water, and if necessary, a dispersant and an antifoaming agent are mixed, and then Add granulated blast furnace slag, slag, portland cement, aggregate, filler, etc., if necessary, which have been mixed in advance, mix further, and after uniformly dispersing the mixture,
If necessary, the viscosity can be adjusted using a thickener or the like. A common method for thickening agents is to mix them with granulated blast furnace slag. When mixing fibers, it is convenient to use fibers that have been defibrated and dispersed in advance. The hydraulic composition slurry thus obtained is applied by a coating device such as a roll coater or a spreader, or
It is applied onto a waterproof layer formed on a wooden board by a method such as spray painting. The shape of the painted surface can be either flat or uneven, but if the purpose is to use it as a mortar base, it is better to use an uneven surface because it increases the surface layer, improves the adhesion of mortar, and makes the application process easier. It has advantages such as good sex and is advantageous. When applying a hydraulic composition slurry, the same composition can be divided into multiple coats, or the composition ratio can be changed and coated alternately, or the slurry can be coated over and over again. By this method, various coatings can be applied to the cured product layer. properties can be imparted to it, expanding the scope of use of the complex. In particular, in order to increase the thickness of the cured material layer in order to give it properties as a substrate, it is best to apply it in layers or by pouring it onto the board. Regarding curing, do you leave it as it is after painting?
Alternatively, after drying, rehydrate the product by spraying water, etc., and keep it indoors for 1 to 7 days or longer, without allowing it to dry out too much, or leaving the moisture required for curing to remain. Either the material is left for natural curing by being left for 1 to 7 days or more in a moist heat state using steam or the like, preferably in an atmosphere of 90° C. or less. These curing processes advance or accelerate the hydration reactions and chemical reactions of the slag, slag, and cementitious materials, but these reactions have the characteristic of proceeding over a long period of time. Therefore, there may be unreacted substances in the cured product layer of the hydraulic composition. The wall base material obtained in this way is composed of a wooden board, a waterproof layer, and a cured layer of a hydraulic composition, so it has excellent strength, physical properties, and waterproofness, and is superior to wood-based materials. Its strengths are toughness, workability,
Good workability and hardness, which is an advantage of inorganic materials,
It has a nonflammable surface, durability, and stability. Therefore, this wall base material has properties suitable as a base material, and has excellent waterproof properties and adhesion to mortar and finishing materials, prevents mortar from peeling off and cracks, and protects the wall. Not only can durability be improved, but also the deterioration in aesthetic appearance caused by cracks can be prevented. In particular, the cured layer of the hydraulic composition of the present invention prevents a decrease in surface strength caused by slag, slag, and cement materials, and also does not cause efflorescence and has good adhesion with mortar, resulting in excellent adhesive strength. It is excellent in that there is no variation and it is stable. Furthermore, the workability of the wall base material is such that it is easy to simply nail the wall base material to pillars, etc., it is easy to cut with a saw, cut out, etc., and the mortar and finishing materials must be painted. It has many excellent properties as a base material, including good workability. Therefore, by applying this wall base material as a base material when performing mortar painting, spray painting, tiling, etc. of architectural structures, lumber, waterproof paper, metal lath, etc. are unnecessary, and there is no need to apply mortar. , intermediate coating can be omitted. This saves labor or streamlines the process, and shortens the construction period. Hereinafter, the present invention will be explained in more detail with reference to Examples, but unless the gist of the present invention is changed,
It is not limited to these. The granulated blast furnace slag used in the examples has a specific surface area of 3720 cm ² /g, and has a weight percentage of 33.9% SiO ₂ , 15.0% Al ₂ O ₃ ,
Fe ₂ O ₃ 0.6%, CaO4 1.7%, MgO6.1%, other 2.7
% chemical composition was used. Example 1 120% of styrene-acrylic copolymer emulsion (solid content 57%) was applied to plywood (wood species Kapor, thickness 7.5 mm, for 5-ply structure) using a roll coater.
It was applied at a rate of g/cm ² and dried at 60° C. for 20 minutes. Next, 80 parts by weight of granulated blast furnace slag, 20 parts by weight of 2 water
Parts by weight, 25 parts by weight of ordinary Portland cement, styrene-acrylic copolymer emulsion (solid content 57
%) 40 parts by weight, 1 part by weight of dispersant and other additives, and 25 parts by weight of water, and the resulting hydraulic composition slurry was coated with a roll coater to form an uneven surface at a rate of 0.8 kg/ ^m2 . Painted at 40℃, relative humidity 90%
It was left in the above atmosphere for one week, and after curing, it was dried at 60°C to obtain a wall base material. Table 1 shows the physical properties of the wall base material thus obtained. Furthermore, when this wall base material was used as a base material, it had a high adhesion to mortar, was waterproof, had good workability, and did not cause any cracks in the mortar. Example 2 Plywood (wood species: white lauan, thickness 7.5 mm, 5
An acrylic emulsion (solid content: 50%) was applied to the ply structure using a roll coater at a rate of 150 g/m ² and dried at 60° C. for 20 minutes. Next, 90 parts by weight of granulated blast furnace slag, 10 parts by weight of 2 water slag
A hydraulic composition slurry obtained by mixing 67 parts by weight of ordinary Portland cement, 33 parts by weight of styrene-butadiene latex (solid content 45%), 1 part by weight of a dispersant and other additives, and 45 parts by weight of water. The surface was coated with a roll coater at a rate of 1.3 kg/m ² to create an uneven surface, and after drying at 60°C for 30 minutes,
After being left at a temperature of 90% or higher at relative humidity for 5 hours, it was left indoors for one week to obtain a wall base material. Table 1 shows the physical properties of the wall base material thus obtained. Furthermore, when this wall base material was used as a base material, it had a high adhesion to mortar, was waterproof, had good workability, and did not cause any cracks in the mortar. Example 3 An epoxy-modified acrylic emulsion (solid content) was coated on plywood (same as in Example 1) using a roll coater.
40%) at a rate of 150 g/m ² and dried at 80° C. for 20 minutes. Next, 80 parts by weight of granulated blast furnace slag, 20 parts by weight of 2 water
Parts by weight, 25 parts by weight of ordinary Portland cement, 10 parts by weight of perlite, 20 parts by weight of ethylene vinyl acetate emulsion (solid content 56%), 1 part by weight of dispersant and other additives.
A hydraulic composition slurry obtained by mixing parts by weight and 35 parts by weight of water was coated at 1.0Kg/m ² with a roll coater.
A wall base material was obtained in the same manner as in Example 1. Table 1 shows the physical properties of the wall base material thus obtained.
Furthermore, when this wall base material was used as a base material, it had high adhesion to mortar finishing material made of white cement, had good waterproof properties and workability, and did not cause any cracks in the finished layer. Example 4 Plywood (same as Example 1) was coated with urethane-modified styrene-butadiene latex (solid content 55%) at a rate of 100 g/m ² using a roll coater, and heated at 60°C.
and dried for 20 minutes. Next, 80 parts by weight of granulated blast furnace slag, 20 parts by weight of 2 water
Parts by weight, 67 parts by weight of ordinary Portland cement, styrene-acrylic emulsion (solid content 57%)
A hydraulic slurry obtained by mixing 120 parts by weight, 2 parts by weight of a setting accelerator, 1 part by weight of a dispersant and other additives, and 10 parts by weight of water was coated with a roll coater at a rate of 400 g/m ² . In addition, 80 parts by weight of granulated blast furnace slag, 20 parts by weight of dihydric slag, 50 parts by weight of ordinary Portland cement, 150 parts by weight of Kansuishi, 50 parts by weight of styrene-acrylic emulsion (solid content 57%),
Mix 2 parts by weight of dispersant and other additives and 20 parts by weight of water,
It was coated smoothly using a roll coater, and a wall base material was obtained in the same manner as in Example 2. Table 1 shows the physical properties of the wall base material thus obtained. Also,
When this wall base material was used as a base material, it had high adhesion to emulsion-based spray paints, had good waterproof construction properties, and was suitable as a base material for spray paints. Furthermore, when a white cement-based spray paint was used instead of the emulsion-based spray paint, it similarly had a high adhesion to the spray paint and was waterproof and easy to apply, making it suitable as a base for the spray paint. Ta.

【table】

[Table] Example 5 In place of the hydraulic composition slurry of Example 3, 80 parts by weight of granulated blast furnace slag, 20 parts by weight of dihydric slag, 25 parts by weight of ordinary Portland cement, and perlite.
12.5 parts by weight, 25 parts by weight of styrene-acrylic copolymer emulsion (solid content 57%), dispersant and other additives 2
A wall base material was obtained in the same manner as in Example 3, except that a hydraulic composition slurry obtained by mixing 52 parts by weight and 52 parts by weight of water was used, and the coating amount was 1.5 kg/ ^m2 . Ta. The adhesive strength of the cured layer of the wall base material thus obtained was 5.8 Kg/cm ² . Also,
A mortar with a volume ratio of cement to standard sand of 1:3 was applied, and after curing, the adhesion force of the mortar was measured using the plane tension method and was found to be 5.5 Kg/cm ² . moreover,
A wall base material was prepared according to this example, and the adhesion force of mortar was measured 5 times using the same method. All of them showed a strength of 4.0 Kg/cm ² or more, and there was no variation in strength and it was stable. . Furthermore, when this wall base material was used as a mortar base material, it had good waterproof properties and workability, and also adhered well to the mortar, resulting in a durable and robust mortar wall. Comparative Example 1 In place of the hydraulic composition slurry of Example 5, 100 parts by weight of ordinary Portland cement, pearlite
10 parts by weight, 20 parts by weight of styrene-acrylic copolymer emulsion (solid content 57%), 1.5 parts by weight of dispersant and other additives
A wall base material was obtained in the same manner as in Example 5, except that a hydraulic composition slurry obtained by mixing 38 parts by weight and 38 parts by weight of water was used. Efflorescence was observed on the surface of the cured material layer of the wall base material thus obtained. The adhesion force of the cured material layer of the wall base material measured in the same manner as in Example 5 was 5.3Kg/cm2, and the adhesion force of the mortar was 5.3Kg/ ^cm2 .
It was 0.4Kg/ ^cm2 . In addition, when the adhesion force of mortar was measured five times in the same way, the first time was 4.0.
The strength was over Kg/cm ² , but the other four times were all
At 1.5 Kg/cm ² or less, the strength was low and the variation was large. Further, when this wall base material was used as a base material for mortar, after 6 months, the edges of the mortar peeled off over a width of 10 to 30 cm and floated up. The reason for this is thought to be that the adhesion force of the mortar was small. Comparative Example 2 In place of the hydraulic composition slurry of Example 5, 45 parts by weight of granulated blast furnace slag, 5 parts by weight of dihydric slag,
Hydraulic properties obtained by mixing 100 parts by weight of ordinary Portland cement, 12.5 parts by weight of perlite, 25 parts by weight of styrene-acrylic copolymer emulsion (solid content 57%), 2 parts by weight of dispersants and other additives, and 64 parts by weight of water. A wall base material was obtained in the same manner as in Example 5 except that the composition slurry was used. The adhesion force of the cured material layer of the wall base material measured in the same manner as in Example 5 was 6.0 Kg/cm ² ,
The adhesion force of the mortar was 3.1 Kg/cm ² . Also,
When the adhesion force of mortar was measured 5 times in the same way, it was 4.0Kg/cm ² or more once, but twice.
1.5Kg/ ^cm2 or less, the other two times were 1.5-4.0Kg/ ^cm2 ,
There was a large variation. Comparative Example 3 In place of the hydraulic composition slurry of Example 5, 80 parts by weight of granulated blast furnace slag, 20 parts by weight of dihydric slag,
90 parts by weight of ordinary Portland cement, perlite
A wall base material was obtained in the same manner as in Example 5, except that 20 parts by weight, 35 parts by weight of styrene-acrylic copolymer emulsion (solid content 57%), 2 parts by weight of dispersant and other additives, and 85 parts by weight of water were used. . The adhesion force of the cured material layer of the wall base material measured in the same manner as in Example 5 was 5.1 Kg/cm ²
The adhesion force of the mortar was 4.9Kg/cm ² .
In addition, when the adhesion force of mortar was measured 5 times in the same manner, it was 4.0 Kg/cm ² or more on 4 occasions, but
The other time it was 1.5-4.0Kg/ ^cm2 . Next, the wall base materials obtained in Examples 4 and 5 and Comparative Examples 1, 2, and 3 were subjected to a repeated drying test. The results are shown in Table 2.

[Table] Repeated drying test method One cycle is immersion in water at 20°C for 2 hours, then 12 hours in a humid atmosphere at 40°C and 90% RH, and then left in a room at 20°C and 65% RH for 10 hours, and the cycle is repeated 10 times. Degree of efflorescence Large: Almost the entire surface is covered Medium: Thin white patches are present over the entire surface None: No efflorescence is observed Mortar adhesion test method Test piece after dry-wet cyclic test After applying and curing mortar with cement: standard sand = 1:3 (volume ratio), it was measured by the plane tension method, and the average value of the five measurements was taken as the adhesion force. Furthermore, the same test is performed five times to determine the average adhesion force and the stability of the adhesion force. The adhesion force stability classifies the adhesion force into three levels and represents the number of times the adhesion force falls under each of the five tests. A; 4.0Kg/cm ² or more, B; 1.5Kg/cm ² or more 4.0Kg/
less than cm ² , C: less than 1.5Kg/cm ² Comparative Example 1 is a case where granulated blast furnace slag and slag are not used in the hydraulic composition, which causes efflorescence and reduces the adhesion of mortar. It is low and the variation is large. Comparative Examples 2 and 3 are cases in which too much Portland cement is used, and as a result, efflorescence is likely to occur, and the adhesion of mortar is low.
There is also large variation. As is clear from the above Examples and Comparative Examples, the wall base material according to the present invention has excellent properties and is found to be extremely useful in practice.

Claims (1)

[Claims] 1 A wooden board has a waterproof layer on one or both sides, and on the waterproof layer, 70 to 95% by weight of granulated blast furnace slag,
For 100 parts by weight of a mixture consisting of 5 to 30 parts by weight of slags, slag, slag, or cement material consisting of 10 to 75 parts by weight of Portland cement; 1. A wall base material comprising a cured layer of a hydraulic composition comprising 2 to 50 parts by weight of a synthetic resin emulsion or rubber latex, water, and, if necessary, a setting regulator and aggregate. 2 A waterproof layer is formed on one or both sides of the wooden board, and on top of the waterproof layer is a mixture consisting of 70 to 95% by weight of granulated blast furnace slag and 5 to 30% by weight of slag.
10 to 75 parts by weight of Portland cement
Slag, slag, and cement-based materials made by adding parts by weight, and said slag, slag, and cement-based materials
After painting a hydraulic composition slurry obtained by mixing 2 to 50 parts by weight of synthetic resin emulsion or rubber latex in terms of solid content per 100 parts by weight, water, and if necessary a setting regulator and aggregate, the slurry is cured. mosquito,
Alternatively, a method for manufacturing a wall base material, which is characterized by drying and then curing by replenishing moisture.