JP7245459B2 - Coating method for exposed concrete surface - Google Patents

Description

The present invention relates to a finishing method for exposed concrete surfaces.

Concrete buildings and structures are constructed by solidifying the concrete filled in the formwork, and the pattern on the surface of the formwork is transferred to the surface of the building, etc., which is released after the formwork is removed. For this reason, in many cases, the surface is finished with tiles and wall materials to maintain its aesthetic appearance, but the exposed concrete surface has a unique design because the surface pattern of the formwork is transferred. It has been highly evaluated for its use in buildings that use the exposed concrete surface as the finished surface without finishing the surface.

Concrete structures, however, are constructed through the process of pouring liquid cement dissolved in water into a formwork, curing, drying, and solidifying. Various defects such as burrows, cracks, and the like are caused due to structural reasons, and it is often difficult to realize a fair-faced concrete surface that has the aesthetic appearance as designed.

In addition, cement, which is the main component of concrete, is a calcareous hydrate, and if it is affected by sunlight, moisture from rainfall, or various acidic contaminants floating in the air, it will become polluted and deteriorate over time. There is also a problem that the deterioration progresses and the aesthetic appearance deteriorates.

Therefore, as proposed in Japanese Utility Model No. 3118405 and Japanese Patent Application Laid-Open No. 2006-206369, it has been attempted to improve the aesthetic effect and durability by repairing and repairing the exposed concrete surface by painting it. Various finishing methods have been proposed.

In the conventional finishing method for exposed concrete surfaces as disclosed in these publications, the exposed concrete surfaces are first colored to hide the discolored portions, and then impregnated with a translucent highly weather-resistant emulsion paint. A non-directional fiber material such as a non-woven fabric is repeatedly crimped to form a concrete patterned coating film, and a protective coating film is formed on the patterned coating film with a hydrophilic clear coating, Since the protective coating film is transparent, the concrete pattern-like coating film creates a concrete pattern with excellent design properties, and the surface is hydrophilic due to the protective coating film, so cleaning is easy. It has many advantages, such as being able to obtain exposed concrete pattern exterior materials that can be applied to

However, the conventional method for finishing the exposed concrete surface is to coat the surface of the pattern coating film applied to the exposed concrete surface with a clear paint and cover it with a protective coating film. Due to the difference in absorption between the treated and non-applied areas, the color matching will change, and it is necessary to anticipate this in advance and perform color matching that requires a very high level of skill.

In addition, since the colored paint used to hide the discolored parts of the exposed concrete surface is made of cement-based material, which is the same quality as concrete, it has poor adhesion to the organic polymer, which is the main component of the paint, and it is difficult to match the color even if it is applied. If it fails, the organic polymer layer must be peeled off in order to repeat it, and furthermore, since the thickness of the clear coating layer cannot be detected, the protective effect is not sufficient in thinly coated areas, and the color fades early. There is also the issue of getting out.

Furthermore, when applying a concrete pattern, if a brush or roller, which is generally used as an applicator, is used, brush marks and paint marks will remain, so the pattern without regularity that is actually expressed on the exposed concrete surface. Since it is not possible to express, for example, felt and non-woven fabric as presented in JP 2001-70876 A non-directional fiber material is impregnated with a paint, and it is repeatedly crimped to the painted surface. However, since the felt or non-woven fabric itself is transferred, it is not possible to reproduce the natural exposed concrete surface, and technical skill is also required.

Registered Utility Model No. 3118405 JP 2006-206369 A JP-A-2001-70876

The present invention solves the problems of the conventional methods for finishing exposed concrete surfaces, and provides a paint for finishing exposed concrete surfaces that is more beautiful and durable without the need for skill, and uses the same. It is an object of the present invention to provide a coating method that is easy to use.

The present invention, which has been made to solve the above-mentioned problems, is a finishing paint for exposed concrete surfaces comprising a translucent undercoat paint containing a weather-resistant resin component and a pigment component, and a weather-resistant resin component and It is characterized by comprising a patterning paint containing a pigment component.

In the present invention, the weather-resistant resin component of the undercoat paint is preferably a fluororesin, or a combination thereof, and the weather-resistant resin component of the patterning paint is a non-volatile component of the paint. It is preferable that the content of the pigment in the non-volatile matter of the paint is 20% by mass or less.

Furthermore, in the present invention, when at least one of the undercoat paint and the patterning paint contains at least one of a photocatalyst and a surfactant, the finished surface can have a self-cleaning function.

Furthermore, in the present invention, the undercoating paint is applied by a spray or a stamp-shaped applicator having at least the coating surface formed of an elastic material, and the patterning paint is applied in the form of a stamp having at least the coating surface formed of an elastic material. In particular, it is possible to follow minute irregularities on the concrete surface and easily reproduce the pattern of the exposed concrete surface.

According to the present invention, the surface protective coating film that covers the surface of the exposed concrete is formed by the undercoat paint that contains a resin component having weather resistance and does not contain pigments that impede weather resistance above a certain concentration, thus ensuring a protective effect. Not only does it maintain durability over a long period of time, but the undercoat paint is semi-transparent and has weather resistance. The texture of the exposed concrete is visible through the surface protective coating and the patterned finish coating without being hidden.

In addition, since the present invention does not apply a clear coating on the finish coating film with the pattern on the exposed concrete surface as in the conventional method, the finish coating film with the pattern on the exposed concrete surface is applied to the surface as in the conventional method. Since it is not painted with clear paint, if it is painted with clear paint, the color will not change due to the difference in absorption between areas that have been retouched and areas that have not been repainted. Since there is no need to do so, construction is possible even for non-experts.

1 is a cross-sectional schematic partial view of a face concrete surface that has been finish installed in accordance with a preferred embodiment of the present invention; FIG. The perspective view which shows an example of the applicator used when apply|coating a concrete pattern using finishing paint in this invention.

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows a finished surface formed by a method for finishing exposed concrete, which is a preferred embodiment of the present invention. First, as shown in FIG. The entire surface of 11 is coated with an undercoat paint 21 and covered with a surface protective coating film 2. - 特許庁

For example, a spray gun 22 or a stamp-like applicator 4 having an application surface 41, a base 42, and a gripping portion 43, which are bottom surfaces shown in FIG. Therefore, the entire surface can be reliably covered with the surface protection coating film 2 by applying the composition even to the exposed concrete surface 11 on which unevenness is formed.

In particular, in the present embodiment, the surface protective coating 2 contains a resin component having weather resistance, so it is highly weather resistant, and since it does not contain a pigment that reacts with cement, the exposed concrete surface 11 is smooth. The exposed concrete surface 11 is not deteriorated and is transparent or translucent, so that the pattern of the exposed concrete surface 11 forming a naturally formed pattern is not hidden and can be seen through the surface protective coating film 2. It is possible to express the aesthetic appearance that makes use of the texture of

Then, in this embodiment, as shown in FIG. 1(b), a pigment component made of a cement-based material and the undercoat paint 21 shown in FIG. As shown in FIG. 1(c), a semi-transparent patterning paint 31 containing a resin component having the same weather resistance as that blended in is applied to the surface protective coating 2 as a concrete pattern finish coating. A membrane 3 is formed.

In this embodiment, the stamp-like applicator 4 shown in FIG. By applying the patterning paint 31 by pressing it onto the surface protective coating film 2, the patterning paint can be applied reliably and without skill, compared with the case of using a conventional applicator such as a non-woven fabric. can be used to easily draw irregular patterns such as the surface of exposed concrete that has been removed from the formwork.

The stamp-like applicator 4 used in this embodiment has a coating surface 41, which is the bottom surface, made of an elastic material such as rubber or sponge. It is possible to form a finishing coating 3 having a pattern very similar to the exposed concrete surface 11 by firmly holding it and pressing it against the surface of the surface protective coating 2 .

As described above, according to the method of coating the exposed concrete surface 11 constructed according to the present embodiment, the exposed concrete surface 11 has weather resistance over the entire surface and is a translucent surface protective coating film that does not contain pigments at a certain concentration or higher. 2, the exposed concrete surface 11 does not deteriorate over a long period of time. In addition, the finish coating film 3 formed thereon also contains a resin component having very long-term weather resistance, so that it can withstand long-term use.

In addition, by applying at least one of a photocatalyst and a surfactant to the undercoat paint 21 or the patterning paint 31, hydrophilicity can be imparted to the finished surface and a self-cleaning function can be imparted.

In the present embodiment, the applicator 4 having a rectangular application surface 41 is used, but other shapes such as circular or elliptical may be used.

1 Structure 2 Surface Protective Coating 3 Finishing Coating 4 Applicator 11 Exposed Concrete Surface 21 Primer Coating 22 Spray Gun 31 Patterning Coating 41 Coating Surface 42 Base 43 Grip

Claims (2)

A translucent undercoat paint containing a weather-resistant resin component and a pigment component that are either a fluororesin, an acrylic silicone resin, or a combination thereof, and a weather-resistant resin component that is a fluororesin and a pigment A method of painting a fair-faced concrete surface using a finishing paint for a concrete surface consisting of a translucent patterning paint containing a component comprising:
First, the entire surface of the exposed concrete surface is coated with the undercoat paint to form a surface protective coating film, and then the pattern is applied using a stamp-like applicator whose bottom surface, which is the coating surface, is formed of an elastic material. A method of coating a exposed concrete surface, wherein a finish coating film having a concrete pattern is formed on the surface protective coating film by applying a coating material for the exposed concrete surface, and the surface of the finish coating film is not coated with a clear coating material. . 2. The method of coating a exposed concrete surface according to claim 1, wherein at least one of the undercoat paint and the patterning paint contains at least one of a photocatalyst and a surfactant.

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