JPH08157282A - Thickly applied rock style decorating method of concrete surface - Google Patents

Abstract

PURPOSE: To obtain a rock style decorating method capable of forming a lightweight thick film excellent in adhesiveness and free from falling off by applying respectively a specific mortar composition, a mortar and a coating material composition in order on the surface of the concrete of a building and civil concrete structure. CONSTITUTION: An epoxy resin mortar composition consisting essentially of an epoxy resin emulsion, prepared by emulsifying a liquefied bisphenol A type or A/F type epoxy resin with a water dispersible modified polyamide-amine and/or modified polyamine in water, and a cement is applied. Next, after a lightweight polymer cement mortar composed of a powder component preferably containing a hollow aggregate and a synthetic resin emulsion is applied so as to have 8-25mm thickness and ruggedness, a multicolor composition 1-15mm in average particle diameter of dispersed phase particle, which is preferably mixture of oil-in-water suspension type coating materials composed of a PVA aq. solution, an organic solvent based composition containing a coloring material and an organic titanate compound and showing different color, is applied.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete surface thickening rock-tone makeup method for improving the aesthetics of construction and civil engineering structures. More specifically, it is excellent in adhesion to the concrete surface even with thick coating. It does not cause cracks on the surface, does not fall off over time, and gives a masonry stone-like makeup with a sense of volume.

[0002]

2. Description of the Related Art Conventionally, there have been cases where a decorative finish is applied to the surface of a concrete building or civil engineering structure for the purpose of aesthetics. As one of such makeup finishes, there is a method of applying a makeup finish with a thin coating material. This is spraying or iron,
A coating material is applied to the surface by roller coating etc.,
The coating film of the finishing material was only a thin film with a thickness of about 0.15 to 10 mm, and the finish had a lack of volume.

On the other hand, there is also a method of sticking tiles of ceramics or the like, but since the tiles are stuck one by one, it takes a long construction period, and there is a risk of peeling and falling for a long time, and the weight of the ceramic tiles is large to some extent. As a result, a personal injury could occur. As a method of applying a decorative finish to a concrete structure instead of the ceramic tile, a mold finish has been proposed in which concrete is poured into a pre-molded foam mold and the mold is removed after the concrete is hardened. However, since such a finishing method involves a step of newly placing concrete, the existing concrete surface has to be chipped and removed, which requires a long construction period. The finishing method was longed for.

As a substitute for this mold finish, a cosmetic finish using a coating material using a topographical molding frame has been proposed. This is a method in which an eye topography molding frame (for example, a perforated shape) is attached to a base material, a coating material is applied from above, and then the eye topography molding frame is removed. Since it is a coating material, it has the advantage that it can be applied to a curved surface. However, since the coating material is applied thickly to some extent, problems such as dripping of the coating material when it is applied and displacement of the eye topography molding frame have occurred.

Therefore, as a makeup finish by spraying mortar, some thick coating materials having a relatively low specific gravity have been proposed. In the case of makeup finishing with such a coating material, it is possible to increase the coating film thickness of the finishing material to about 20 to 30 mm, but if it is applied at one time, absorption of moisture into the base is too large, or Due to non-uniformity, there are many problems such as cracking during hardening, poor adhesion and falling off during work, and falling off due to skin separation from the concrete surface after hardening. It has not been realized.

Therefore, although measures have been taken such as applying a synthetic resin emulsion called a water absorption adjusting material in advance before applying the finishing material, the present situation is that the adhesiveness to concrete has not been improved. In addition, in order to improve the adhesiveness to concrete, it is also possible to apply a finishing material by interposing a solvent-based epoxy resin between the foundation and the finishing material, but the adhesion is relatively good on a dry substrate. However, when the base is wet, the adhesion tends to be significantly reduced. Further, with regard to the use of solvent-based coating materials, the current situation is that the use regulations are becoming strict due to the danger of fire, the problem of pollution caused by air pollution, the effect on human bodies, and the cost increase due to solvents.

Therefore, in recent years, a finishing material has been applied by interposing an epoxy resin mortar containing an epoxy emulsion in which an epoxy resin is dispersed with an emulsifier as a resin component, but it is relatively bonded on a dry substrate. Although the properties are improved, there are various problems such as the physical properties being remarkably deteriorated when the substrate is moist due to the problem of water resistance or when there is a lot of humidity, and it has not been substantially improved.

Further, in the above-mentioned conventional method, a plurality of types of mixed materials having different colors are prepared by mixing ceramics, which are baked and pulverized with pigments, into the synthetic resin on the surface of the finishing material. A stone-like paint film is formed by simultaneously spraying multiple types of mixed materials from separate spray ports of a multi-headed gun, or spraying each mixed material multiple times with a single-headed gun, and applying it to the surface in multiple colors. However, there is a case where it gives a design property as if the rocks were piled up as a whole, but in such a rock-like finish, the coating film surface is formed with fine irregularities due to the inclusion of aggregate. Diffuse reflection occurs when the coating surface is exposed to light. on the other hand,
The uneven thick film formed by the finishing material can sense the unevenness by the shade of light. Therefore, when a coating film that causes such diffused reflection is present on the surface, the appearance from a distance can be seen as a whole including the unevenness of the finishing material layer and the joint pattern, and unevenness with a profound feeling There was a problem that you could not feel the thickness. Considering the problems of each finishing method like this,
I tried to list the conditions for the makeup finishing method with a desired thickness.

[0009]

As a preferred construction method for applying a rock-like decorative finish by thickening the surface of concrete, there are those that satisfy the following conditions. Thick film finishing material can be formed. (The adhesive strength is large and it does not fall off before curing.) The finishing material itself is lightweight. Even if thickened, it should not float or crack over time. Must not fall off over time. (The adhesive strength is large even over time, and the coating material itself is lightweight.) High adhesion even on wet surfaces. It is possible to make up with a volume of makeup. Furthermore, a stone material coating material is laminated on the above-mentioned decorative finish surface so as not to lose the unevenness feeling and the solid feeling due to the thickness of the decorative finish even in the distant view. Then, as a result of diligent research, the present inventors have completed a concrete surface thickening rock-tone makeup method that satisfies all the above conditions.

[0010]

Means for Solving the Problems That is, according to the present invention, (1) (a) a liquid bisphenol A type or a bisphenol A / F type epoxy resin can be dispersed in water on a concrete surface of a building or civil engineering concrete structure. Epoxy resin emulsion emulsified in water using a modified polyamidoamine and / or modified polyamine, (b) a first step of applying an epoxy resin mortar composition containing cement as a main component, and (2) a lightweight polymer cement A second step of applying mortar in an uneven shape to a thickness of 8 to 25 mm;
(3) The present invention provides a concrete surface thickening rock tone makeup method characterized by comprising a third step of applying a specific multi-color coating composition.

First, the epoxy resin mortar composition applied in the first step is a liquid bisphenol A type or bisphenol A / F type epoxy resin prepared by using a water-dispersible modified polyamidoamine and / or modified polyamine. It is formed by mixing an epoxy resin emulsion emulsified in water and a cement as an essential component with a powder component containing silica sand, other aggregates, a filler and the like as appropriate. By combining this epoxy resin emulsion and hydraulic cement, a hardening reaction of the epoxy resin and a hydration solidification reaction of the cement can be combined to form a strong coating layer, and the concrete surface is modified, It is possible to form a thick film for the finishing material. Further, this epoxy resin mortar composition has excellent adhesion to the base even if the base is a wet surface, and can form a strong coating film having excellent physical properties even when the humidity in the air is high.

The epoxy resin which is a component of this epoxy resin emulsion is not particularly limited as long as it has at least two epoxy groups in the molecule and is a bisphenol A type or bisphenol A / F type epoxy resin. , And may be used alone or in combination of two or more kinds.

The modified polyamidoamine and / or modified polyamine dispersible in water include all polyamidoamine and modified polyamine having good dispersibility in water. The modified polyamidoamine includes all polyamides having an imidazoline ring, and specifically, for example, linoleic acid, oleic acid, linoelaidic acid,
Dimer acid obtained by polymerization of unsaturated aliphatic acid such as valinaric acid and arachidonic acid, trimer acid and modified polyamine such as diethylenetriamine, triethylenetetramine, tetraethylenepentamine or bentaethylenehexamine are converted into hydrochloric acid, acetic acid, lactic acid or propion There is a production method such as cationization by neutralizing with an acid such as acid, but the method is not limited. Further, the modified polyamine includes all the modified polyamines having an ether skeleton. These may be used alone or in combination of two or more.

Next, the cements used here include cements usually known as inorganic binders, and specifically, for example, ordinary Portland cement, early strength Portland cement, super early strength Portland cement, white Portland cement, Examples include moderate heat Portland cement, blast furnace cement, fly ash cement, silica cement, colloidal cement, and alumina cement. These may be used alone or in combination of two or more.

The epoxy resin mortar composition for forming the epoxy resin mortar layer contains an epoxy resin emulsion and cement as essential components, but preferably contains silica sand, other aggregates, fillers and the like. As the silica sand used here, a general commercial product can be used, and the particle size is generally 100 μ to 800 μ. As other aggregates, artificial or natural aggregates having a particle size of approximately 50 μ to 500 μ can be used. As the filler, mineral fibers, bentonite, etc. can be used, and if necessary, various additives such as a thickener can be appropriately added.

The ratio of cement / silica sand in the powder component is preferably 100/100 to 100/200 in parts by weight. This is because when the silica sand deviates from this ratio with respect to the cement, the coating strength of the coating film formed by the epoxy resin mortar becomes low. In the present invention,
Resin solid content 100 in the above-mentioned epoxy resin emulsion
It is desirable that the powder component is contained in an amount of 100 to 500 parts by weight based on parts by weight. This is because when the powder component is less than 100 parts by weight, the initial strength of the epoxy resin mortar layer is slow to develop and the adhesion to the lightweight polymer cement mortar layer is reduced, and when the powder component is more than 500 parts by weight. This is because, although the initial strength is expressed quickly, the adhesion to the concrete surface is lowered, and especially the adhesion to the wet surface is observed.

Next, the lightweight polymer cement mortar composition used in the second step generally comprises a powder component containing cement and a lightweight aggregate and a synthetic resin emulsion, and in particular, a cement and a hollow aggregate, an aggregate, A powder component including a filler and the like, and a synthetic resin emulsion are preferable. Here, as the cement to be used, cements usually known as an inorganic binder are included, and specifically the same cements as those used in the epoxy resin mortar composition forming the epoxy resin mortar layer can be mentioned. .
These may be used alone or in combination of two or more.

The hollow aggregate used in this case has a cavity inside the aggregate which is an inorganic filler, and has a specific gravity smaller than that of a general inorganic filler and is filled in a coating material. By using it as a material, the weight of the finishing material can be reduced. Furthermore, since it is possible to reduce the weight, it is possible to apply a thick coating on the finishing material, which makes it possible to finish with a sense of volume. Such hollow aggregates include all that have cavities inside the aggregates, but specifically include, for example, shirasu balloons, micro hollow spheres (aminosilicate fillers), diatomaceous earth, calcined diatomaceous earth, and fluxes. Examples include calcined diatomaceous earth, fly ash, minute carbon hollows (crecasspheres), calcined clay, granular pumice stone, activated carbon, vermiculite, perlite, calcined vermiculite and the like.

Further, aggregates, fillers and the like, which are added as required, include silica sand, mineral fibers, organic fibers and the like, and addition of various additives such as thickeners causes no problem.
Next, as the synthetic resin emulsion, synthetic resin emulsions that are generally used as a part of the binder in polymer cement are included, and specifically, styrene-butadiene rubber latex, acrylate alone or,
A commercially available cement-mixing emulsion such as a copolymer emulsion, an ethylene-vinyl acetate copolymer emulsion, a vinyl acetate-veova copolymer emulsion, or a re-emulsifiable emulsion powder can be appropriately used. These may be used alone or in combination of two or more.

Here, the mixing ratio of these components is 30 to 100 parts by weight of powder components including lightweight aggregate, preferably hollow aggregate, aggregate, filler, etc., per 100 parts by weight of cement component, synthetic resin emulsion. The resin solid content in the component is 5 to 3
The one containing 0 parts by weight is desirable. This depends on the kind of the lightweight aggregate used, but when the powder component is less than 30 parts by weight with respect to the cement, the overall density of the lightweight polymer cement mortar layer increases, and the powder component is 100%.
When the amount is more than the weight part, the density of the lightweight polymer cement mortar layer becomes small, but the strength becomes a problem. Furthermore, the resin solid content of the synthetic resin emulsion is 5
When it is less than the weight part, the initial hardness is delayed,
This is because when the resin solid content is more than 30 parts by weight, the initial hardness develops quickly, but the adhesion to the epoxy resin mortar layer decreases.

The lightweight polymer cement mortar is blended with one or more kinds of lightweight aggregates, preferably hollow aggregates, so that the density of the hardened body is 0.6 to 1.2 g / cm ^3. Is preferred. This is because when the density of the cured product is less than 0.6 g / cm ³ , the strength of the lightweight polymer-cement mortar layer decreases, or 1.2 g / cm 2.
This is because when it is larger than cm ³ , the weight is not so great. Desirably, the amount is 0.8 to 1.0 g / cm ³ or less.

Next, the specific multi-color paint composition used in the third step is made to have a prominent feeling of the thick and thin film formed by the first step and the second step, to make the volume stand out, and to have a rock-like appearance on the surface. It imparts a pattern, and these effects must be able to be clearly generated even in the appearance in the distant view. As a coating composition having such a function, when the coating film to be formed is exposed to light, it does not impair the shadow of light due to the unevenness of the finishing material layer, that is, its surface texture is relatively smooth and sufficient. It must have good reflectivity. Such a coating composition is a multicolored coating composition that has been conventionally used, and its design becomes a stone material, that is, not a multicolored coating composition by coloring an aggregate, but its dispersed phase particles. The average particle diameter is not particularly limited as long as it is 1 to 15 mm. At this time, if the average particle size of the dispersed phase particles is smaller than 1 mm, a rock-like design is not exhibited in the distant view,
When it is larger than 15 mm, there are problems in manufacturing difficulty and storage stability. An example of such a multicolored coating composition is disclosed in JP-A-54-87738, "A polymerizable vinyl monomer using a neutralized product of an acrylic resin or a neutralized product of a maleated polybutadiene polymer as an emulsifier. A dispersion phase consisting of a colored water-based coating containing a mixture of a water-dispersible vinyl polymer obtained by emulsion polymerization and a neutralized product of the acrylic resin as a main component, a synthetic resin emulsion and / or a polyaminocarboxylic acid derivative. A multicolored paint composition described as "Aqueous multicolored paint composition, which is prepared by stirring and dispersing in a dispersion medium prepared by mixing a colored synthetic resin emulsion paint and gelling the surface of dispersed particles to form an aqueous dispersion". Corresponding ones are disclosed in JP-A-1-289877, "(1)
A multicolored paint in which a colorant particle that is incompatible with the dispersion medium of the paint and hollow particles that have no liquid impregnation property are dispersedly contained in an aqueous paint. (2) The multicolor paint according to claim 1, wherein the colorant particles are particles obtained by suspending and dispersing in water a color paint which is incompatible with water. Examples of the multicolored coating composition described as "" correspond to the above regulations. . Further, (f) the vinyl-based synthetic resin having an acid value of 5 to 30 is 5 to 5 parts by weight in solid content with respect to 100 parts by weight of an aqueous polyvinyl alcohol solution having a concentration of 0.5 to 5.0% by weight. It is produced by dispersing 50 to 250 parts by weight of an organic solvent-based composition containing 30% by weight and 1 to 50% by weight of a coloring material as essential components, and 0.5 to 5 parts by weight of (h) an organic titanate compound. Regarding the oil-in-water suspension type coating composition, those produced by appropriately mixing the respective colors of the oil-in-water type suspension coating composition which have been colored differently with different coloring materials have a more rock-like appearance. It is more desirable because it has a surface texture.

Here, the procedure for blending the components of these oil-in-water type suspension coating compositions is such that the organic solvent type composition (g) is gradually added while stirring the polyvinyl alcohol aqueous solution (f). , By adding the organic titanate compound of (h) with continued stirring. Where (f)
The polyvinyl alcohol aqueous solution has a concentration of 0.5 to 5% by weight, but may have a degree of polymerization of about 300 to 1000 dissolved in water. If the concentration of polyvinyl alcohol is lower than 0.5, the dispersed phase particles cannot be stabilized and are fused to each other. If it is higher than 5, the particle size is too large,
It is difficult for the dispersed phase to be stably dispersed at the target particle size.

The organic solvent-based composition (g) is an aliphatic hydrocarbon such as petroleum benzene, mineral spirits and terpenes, an aromatic hydrocarbon such as benzene, toluene and xylene, and an alicyclic hydrocarbon such as cyclohexane. Solvents such as chlorinated hydrocarbons such as dichloroethane, trichlene, perclen or mixed solvents thereof, vinyl acetates such as vinyl acetate and vinyl propionate, vinyl ethers such as ethyl vinyl ether and butyl vinyl ether, acrylates of aliphatic alcohol And vinyl-based synthetic resins obtained by polymerizing one or more of methacrylates, acrylonitrile, styrene, vinyl chloride, vinylidene chloride, vinyltoluene, acrylic acid, methacrylic acid, etc., and titanium oxide, calcium carbonate, talc, clay,
It is a mixture of coloring materials such as lithopone, white carbon, bentonite, gypsum, barium sulfate, mica, iron oxide, oak, carbon black, chromium oxide, ultramarine blue, cadmium red, Hansa yellow, phthalocyanine blue, phthalocyanine green. is there.

At this time, when the acid value of the vinyl-based synthetic resin is less than 5, the cross-linking level of polyvinyl alcohol adsorbed on the surface of the particles of the dispersed phase is too low, and the particles are fused to each other. On the contrary, when the acid value is larger than 30, the system micelles do not have a predetermined particle size and are emulsified. The ratio of the solvent to the resin and the coloring material can be appropriately selected according to the intended design, but preferably the organic solvent 2
The ratio of 0 to 60% by weight, 5 to 30% by weight of vinyl synthetic resin, and 1 to 50% by weight of coloring material is desirable.

The organic titanate compound (h) is an organic compound having titanium as a central metal, and is an alkoxide type such as tetra-i-propoxytitanium or tetra-n-butoxytitanium, di-i-propoxy bis (acetyl). Acetonato) titanium and other acylate types and di-n-butoxy bis (triethanolaminato) titanium and other chelate types can be used, but di-n-butoxy bis (triethanolaminato) titanium and the like. The chelate type is preferably used because it gradually hydrolyzes in an aqueous dispersion medium.

The compounding ratio of (f), (g) and (h) is 5 to 250 parts by weight of (g) and 0.5 to 5 parts by weight of (h) with respect to 100 parts by weight of (f). However, when these ratios are out of the range, not only the desired multicolored pattern design feeling is not obtained, but also the weather resistance of the coating film is deteriorated.

On the other hand, when a cationic polyvinyl alcohol is used in place of the polyvinyl alcohol used in the polyvinyl alcohol aqueous solution of the component (f) of the present invention, a multi-color paint composition having more excellent antifouling property and antifungal property is obtained. Become. Such a cationic polyvinyl alcohol is not particularly limited, but if an example is given for each production method thereof,
First, as a method of post-modifying a polyvinyl alcohol polymer, introduction of an amino group by aminoacetalization described in JP-B-30-5563, JP-B-57-3484.
As a method for producing a cationic polyvinyl alcohol containing a quaternary ammonium salt by reacting glycidyltrimethylammonium chloride with polyvinyl alcohol in the presence of an alkali catalyst as described in JP-A No. 2-2, and a second method for copolymerizing, 56-14504, JP-A-5
6-884113 and JP-A-56-118997, aminoalkyl (meth) acrylamides,
A method for obtaining a cationic polyvinyl alcohol by saponifying a copolymer of aminoalkyl (meth) acrylate (or a quaternary ammonium salt thereof) and vinyl acetate, and further, as described in JP-A-59-135202. N
-(3-allyloxy-2-hydroxypropyl) dimethylamine, N- (3-allyloxy-2-hydroxy-2-methylpropyl) dimethylamine, N- (4-allyloxy-3-hydroxybutyl) dimethylamine and their Examples thereof include those obtained by a method of partially or completely saponifying a copolymer of a cationic monomer such as a quaternary ammonium salt and an alkyl vinyl ester.

The concentration of the cationic polyvinyl alcohol aqueous solution is 0.
5 to 5.0% by weight, but the degree of polymerization is 1000 to 1
It may be a solution of about 500 dissolved in warm water at 50 ° C to 80 ° C. If the concentration of polyvinyl alcohol is lower than 0.5, the particles of the dispersed phase cannot be stabilized and are fused to each other. If the concentration of polyvinyl alcohol is higher than 5.0, the particle size is too large and the dispersed phase is stable at the target particle size. It is similar to ordinary polyvinyl alcohol in that it is not dispersed. In the multicolored coating composition containing this cationic polyvinyl alcohol, due to the influence of the electrical properties of the cationic polyvinyl alcohol,
The optimal mixing ratio of the organic titanate compound as the component (h) is 0.1 to 0.5 parts by weight with respect to 100 parts by weight of the aqueous cationic polyvinyl alcohol solution having a concentration of 0.5 to 5.0% by weight. .

Furthermore, when a cross-linking agent is further added to the organic solvent type composition of the component (g) of the present invention, the strength of the dispersed phase is improved and the destruction of the dispersed phase during stirring is further reduced. However, even if the strength of the dispersed phase is improved in this way,
Since the dispersed phase surface gelled film does not change, there is no influence on the fusion of the dispersed phase at the time of coating film formation. Such a cross-linking agent is not particularly limited as long as it cross-links the resin in the component (g), and examples of the inorganic compound include metal oxides such as magnesium oxide, calcium oxide, zinc oxide and aluminum oxide. Compounds, metal halides such as calcium chloride and magnesium chloride, and organic compounds such as organic acid metal salts such as calcium acetate and calcium phthalate, phenol and amino resins, amine and aziridine compounds, isocyanate, and vinyltriethoxysilane. A silane coupling agent such as vinyltris (β-methoxyethoxy) silane, γ-methacryloxypropyltrimethoxysilane, or the organic titanate compound described above can also be used. The compounding ratio of such an organic coupling agent varies depending on its type, but it is preferably about 1 to 5% by weight in the organic solvent-based composition. Further, since the inside of the dispersed phase is crosslinked to some extent by this organic coupling agent, the acid value of the resin forming the dispersed phase is widened to a range of 1 to 30 as compared with 5 to 30 when the organic coupling agent is not added. However, the intended suspension type coating composition can be obtained without destruction during stirring.

The first of the methods of the present invention is to perform the first step of forming the epoxy resin mortar layer described above and the second step of coating the light weight polymer cement mortar layer, and apply a specific multicolor paint composition. It is a method of performing the third step. Here, in the first step, an epoxy resin mortar adjusted to have a viscosity suitable for application conditions is applied to a substrate with a brush, a roller, a trowel, a spray gun, or the like at a rate of about 0.8 kg / m 2.
^It is applied to the entire surface of the object to be coated at a rate of ^{2 to} 2.5 kg / m ² .
By interposing the epoxy resin mortar layer formed in the first step, the adhesive force of the lightweight polymer cement mortar is increased, and a thick film can be formed. On top of this, the light weight polymer cement mortar layer in the second step is formed to have a thickness of 8 to 25 mm, because if it is 8 mm or less, the finished product lacks volume. Also 2
When the thickness is 5 mm or more, workability problems such as dripping at the time of coating may occur, so 8 to 25 mm is preferable. In this case, it is necessary to form the lightweight polymer cement in an uneven shape. The uneven shape means the surface relief of a rock, which means that a relatively large pattern is formed by using a spray, a trowel, or a roller. The third step is to apply a specific multi-color paint composition to H
0.4kg / m ² ~ 1.0 depending on S spray gun
It is applied at a rate of kg / m ² to form a coating that creates a stone-like design, but the coating formed from this multi-color coating composition does not use particles such as colored aggregates. Therefore, it has a feature that its surface texture is relatively smooth. This surface smoothness has sufficient reflectivity no matter what angle of light is incident, which allows the thick film feeling and unevenness formed by the first and second steps to be seen in the distant view. It will be possible to feel even at the bottom. That is, a thick film or unevenness is formed by the first and second steps, and a stone-like design is given by the third step, and a thick film in the distant view, and a light reflecting action that gives a feeling of unevenness are given. To do. In order to further enhance this effect and to improve weather resistance and stain resistance, a water-based or solvent-based clear type top coat material, such as an acrylic resin type, a polyurethane resin type, an acrylic silicon resin type, or a fluorine resin is used. Various top coat materials used in ordinary civil engineering and construction fields such as systems may be used.

In the second method of the present invention, after the completion of the first step of the above-mentioned method, a joint forming frame is attached on the epoxy resin mortar layer, and then the light weight polymer cement mortar of the second step is applied. An arbitrary pattern is formed by removing the joint forming mold before the formed lightweight polymer cement mortar layer is cured. In this way, by forming the joint part using the joint forming frame, the thickness of the finishing material can be emphasized, and the contrast with the joint part enables a more voluminous makeup finish. Become.

[0033]

【Example】

(Example 1) Epoxy resin having a resin solid content of 100% 70.
35.7 parts by weight (solid content: 70.3 parts by weight) of water-dispersible modified polyamine (resin solid content: 65%) was 45.7.
Parts by weight (solid content 29.7 parts by weight), methyl cellulose 1.0 part by weight, water 160.0 parts by weight, and as a cement component, Portland cement 120.0 parts by weight, silica sand 228.0 parts by weight, and others. Powder component of 2.0
An epoxy resin mortar composition was prepared by adding parts by weight and stirring sufficiently. The compounding ratio at this time is 1 resin solid content.
The powder component was 350.0 parts by weight with respect to 00 parts by weight. The cement / silica sand ratio was about 100/190.

Next, with respect to 100 parts by weight of Portland cement, 8.0 parts by weight of shirasu balloon and 2 parts of phyllite (aluminosilicate type micro hollow spheres manufactured by phyllite).
3.0 parts by weight, other aggregate (silica sand) 25.0 parts by weight,
22.5 parts by weight (solid content 11.25 parts by weight) of a styrene-butadiene rubber latex having a resin solid content of 50% as an admixture, to a powder component containing 0.2 parts by weight of a filler and the like.
A lightweight polymer cement mortar composition was prepared by adding 38.9 parts by weight of water and thoroughly stirring the mixture. The blending ratio at this time was 56.2 parts by weight of the powder component and 11.25 parts by weight of the resin solid content based on 100 parts by weight of cement, and the density of the cured product was 0.98 g / cm ³ .

Next, to a dispersion medium consisting of 100 parts by weight of a 1% aqueous solution of a cationic polyvinyl alcohol having a degree of polymerization of 1200 and a degree of saponification of 89, terpenes 60.0 parts by weight and titanium dioxide 60 having a solid content of titanium dioxide of 60% are used. 0.0 parts by weight, a molecular weight of about 150,000, an acid value of 3, and a solid content of 50% were added to 50.0% of an acrylic acid ester-methacrylic acid ester copolymer.
1 part by weight and 0.7 part by weight of master paint were mixed to prepare a dispersed phase whose hue was adjusted to L ^* = 77.6, a ^* =-0.1, b ^* = 4.0, and the above dispersion medium was added. It was added while stirring at 500-1500 rpm (peripheral speed 1.0 m / s) with an impeller in a stirring tank, and then 4.0 parts by weight of di-n-butoxybis (triethanolaminato) titanium was added to produce it. 2. a suspension type coating composition and a master paint.
5 parts by weight were mixed, and the hue was L ^* = 63.7, a ^* =-
A suspension type coating composition prepared in the same manner except that a dispersed phase adjusted to 0.3, b ^* = 5.5 was used was mixed in an equivalent amount. A patterned coating composition was obtained.

This epoxy resin mortar composition, the lightweight polymer cement mortar composition and the multicolored paint composition were applied to a mortar board of 70 × 70 × 20 mm (in a dry state or in a wet state (the preparation method is described below. 6 pieces each)) in order, except for the test plate preparation method and coating thickness, JIS A 6916 5.6 Adhesion strength test and JIS A 69165.
10 The adhesive strength was measured according to the durability test.
However, the test was conducted by forming the epoxy resin mortar layer to a thickness of 2 mm and the lightweight polymer cement mortar layer to a thickness of 10 mm. Further, a visual comparison of appearance from a distant view (testing method is as described below) was also performed separately. The results of these tests are shown in Table 2. The results show good adhesion to dry and wet substrates, showing good adhesion over time, and the application of the multi-color paint composition makes it possible to feel the unevenness even in the distant view. Moreover, the pattern of the multi-color paint composition had a rock-like design.

(Method for preparing mortar board) (1) Method for preparing dry mortar board A standard mortar board was used as the dry mortar board. (2) Method of preparing wet mortar board Standard mortar was poured into a mortar frame of 70x70x20 mm, and after curing for 24 hours, it was immediately used as a test board.

(Adhesive strength test method) A standard mortar plate was used as the test plate, and the test was conducted based on the JIS A 6916 5.6 adhesive strength test. The coating thickness is 2 mm of epoxy resin mortar layer,
A lightweight polymer cement mortar layer was applied and dried with 10 mm, and then the multicolored coating composition was applied with an HS gun at a tip diameter of 5 mm and an air pressure of 200 to 300 kPa. Hold the specimen with the sample applied and fully cured horizontally in the curing chamber, apply the adhesive to the sample application surface, gently place the upper tension jig (steel) on it, and lightly rub it. Then, put a weight of 1 kg on it, and carefully remove the adhesive that sticks out around it. Two
After leaving still for 4 hours, the weight was removed, and a tensile force was applied in the vertical direction to the sample surface using a lower tension jig (made of steel) and a steel patch plate to determine the maximum tensile load. The adhesion strength is calculated by the following formula and rounded off to a value with one decimal place. Adhesive strength (N / cm ² ) = T / 16 Here, T: maximum tensile load (N) The adhesive strength of each of three test specimens of a dry substrate and a wet substrate was measured, and the average value was taken as the result.

(Durability Test) A specimen was prepared in the same manner as in the adhesion test, cured for 7 days, then immersed in water for 18 hours and taken out, and immediately cooled in a constant temperature bath of −20 ± 3 ° C. for 3 hours. Further, the operation of heating for 3 hours in a constant temperature bath at 50 ± 3 ° C. is repeated 10 times, and after standing in the curing room for 2 hours, the appearance is observed. Then, after cutting the periphery to reach the substrate, the adhesion strength was determined by the same test method as the adhesion strength test method. Similar to the adhesive strength, the adhesive strength of each of three test pieces on the dry substrate and the wet substrate was measured, and the average value was used as the result.

(Visual appearance in the distant view) The test plate is 1.8 ×
A 0.9 m slate plate was used to apply an epoxy resin mortar layer of 2 mm and a lightweight polymer cement mortar layer of 10 mm, and a trowel was used to form irregularities of about 10 mm on the surface, followed by drying to obtain a test sample for comparison. Subsequently, the multi-color paint composition was applied with an HS gun to a tip diameter of 5 mm and an air pressure of 20.
A test body was prepared by applying 0.6 kg / m ² to 0 to 300 kPa. The appearance of the test body and the comparative test are visually observed from a distance of 10 m to evaluate unevenness and rock feeling. In particular, the results were shown as O when a feeling of unevenness or rock was felt, Δ when it was felt a little, and X when it was not felt at all.

Example 2 A test was conducted in the same manner as in Example 1 except that the formulation of the lightweight polymer cement mortar composition was as shown in Formulation 2 of Table 1. The density of the cured product of the lightweight polymer cement mortar composition is 0.96 g /
It was cm ³ . The results are shown in Table 2. Good results were obtained as in Example 1.

Example 3 The same test as in Example 1 was conducted, except that the formulation of the lightweight polymer cement mortar composition was as shown in formulation example 3 of Table 1. The density of the cured product of the lightweight polymer cement mortar composition is 0.93 g /
It was cm ³ . The results are shown in Table 2. Good results were obtained as in Example 1.

(Comparative Example 1) A test was conducted in the same manner as in Example 1 except that instead of the epoxy resin mortar composition, "KAKEN Cement Filler" (cement-based primer adjusting coating material) manufactured by SK Kaken Co., Ltd. was applied. . The density of the cured product of the lightweight polymer cement mortar composition was 0.98 g / cm ³ . The results are shown in Table 3. In particular, the adhesion to the substrate was poor even on a wet substrate, and partly floated over time.

(Comparative Example 2) In the manufacture of a multicolor paint composition, the adjusted dispersion phase was mixed with the above dispersion medium in an agitator at 1000 to 3000 rpm (peripheral speed 2.0 m /
The test was performed in the same manner as in Example 1 except that the suspension type coating composition in which the average particle diameter of the disperse phase was 0.1 mm was used in (s) with stirring. The results are shown in Table 3. Adhesion and durability were not so problematic, but the stone-like pattern given to the surface by the multi-color paint composition was fine, and even if it was combined with the thickening and uneven pattern formed by the lightweight polymer cement layer, it had a rock-like effect. Didn't look like.

Comparative Example 3 Instead of the multicolored coating composition, 15 parts by weight of an acrylic styrene copolymer emulsion, 50 parts by weight of a different colored silica sand mixture having a particle size of 0.1 to 5.0 mm, and a particle size. Nature produced by mixing 15 parts by weight of cold water stone of 0.5 to 1.0 mm, 10 parts by weight of silica sand having a particle size of 0.1 to 0.5 mm, 3 parts by weight of various additives, and 10 parts by weight of water. The test was conducted in the same manner as in Example 1 except that the stone coating material was used. The results are shown in Table 3. This natural stone coating material had no problem with adhesion and durability, but the uneven pattern formed by the light-weight polymer cement layer seemed to be one and felt in the distant view. could not.

[Table 1]

[Table 2]

[Table 3]

[0046]

According to the present invention, the following effects can be obtained. (1) By interposing the epoxy resin mortar layer, the adhesion of the lightweight polymer cement mortar layer, which is the finishing layer, becomes large, and it becomes possible to form a thick film. (2) The adhesive strength was large even with the passage of time, and the surface did not crack or fall off. (3) By interposing an epoxy resin mortar layer using an epoxy resin emulsion in which an epoxy resin is emulsified with a water-dispersible modified polyamidoamine or the like, construction on a wet surface is also possible. (4) Since it is possible to apply thick coating, it is possible to do a volume-rich makeup finish in a short period of time. further,
By using a joint bar to form a pattern, a more voluminous makeup finish is possible. (5) Since a specific multicolored coating composition that forms a smooth and stone-like pattern is applied to the surface, it is a rock-like design combined with a thick film and a profound uneven pattern formed of lightweight polymer cement mortar In addition to giving a feeling, it is possible to feel the unevenness and the feeling of rocks even in the distant view. The effects described above are obtained, and the present invention makes it possible to make a thick rock-like makeup finish on the concrete surface of buildings and civil engineering concrete structures with a sense of volume in a short time.

Front page continuation (72) Inventor Shin Yamamoto 1-25-10 Shimizu, Ibaraki-shi, Osaka SK Research Institute Co., Ltd. (72) Inventor Yoshiichi Ishida 1-25-10 Shimizu, Ibaraki-shi, Osaka Research Institute

Claims (3)

[Claims] 1. A modified polyamidoamine and / or modified polyamine capable of water-dispersing a concrete surface of a building or civil engineering concrete structure with (1) (a) a liquid bisphenol A type or a bisphenol A / F type epoxy resin. Epoxy resin emulsion emulsified in water using, (b) a first step of applying an epoxy resin mortar composition containing cement as a main component, and (2) a lightweight polymer cement mortar having a thickness of 8 to 25
mm in a concavo-convex shape, and (3) a third step of applying a multicolored paint composition having an average particle size of dispersed phase particles of 1 to 15 mm Toning and makeup method. 2. An epoxy resin mortar composition comprising:
(A) Includes cement, silica sand, aggregate, and filler, and the ratio of cement / silica sand is 100/100 to 100/200 in parts by weight.
And (b) a liquid bisphenol A type or bisphenol A / F type epoxy resin are emulsified in water using a water dispersible modified polyamidoamine and / or modified polyamine. , (B) 100 to 500 parts by weight of the resin solid content in the component (b), (2) lightweight polymer cement mortar composition, (c)
100 parts by weight of cement, (d) 30 to 100 parts by weight of a powder component containing hollow aggregate as an essential component, and (e) 5 to 30 parts by weight of a synthetic resin emulsion in terms of solid content, (3) Multicolored pattern The coating composition is (f) 100 parts by weight of an aqueous polyvinyl alcohol solution having a concentration of 0.5 to 5% by weight,
(G) Organic solvent-based composition 50 to 25 containing a coloring material
2. An oil-in-water suspension type coating composition comprising 0 part by weight and (h) 0.5 to 5 parts by weight of an organic titanate compound, which is a mixture of different colors. Rock surface makeup method with concrete surface thickening. 3. A joint forming mold is attached after the first step, and the joint topographic molding frame is removed after the second step and before the light weight polymer cement mortar composition is cured. Item 1. The concrete surface thickened rock-tone makeup method according to Item 1 or 2.