JPH1181610A - Patterning method on concrete face and implement therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a patterning method on a concrete face capable of imparting a pattern bearing extreme resemblance to the pattern of a surrounding fair-faced concrete face on a repair concrete face. SOLUTION: A base material, which is a mixture of at least white cement, macromolecule emulsion and water, is applied on a fair-baced concrete face 10 after making necessary repair (a face 20). A required pattern is imparted to the concrete face by applying a finishing material, which is a material of a mixture of at least a colorant, macromolecule emulsion and water and has a darker color tone than that of the base material, on the base material after it has dried by using a pattern imparting implement having its surface covered with a felting 51 preferably in a manner of pressing it against the base material (a bace 30).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for patterning a concrete surface and, more particularly, to a method and an apparatus for patterning a bare concrete surface so as to match the color tone of the surrounding concrete surface. .

[0002]

2. Description of the Related Art In a concrete building, surface finishing work such as applying mortar or the like to the surface of cast concrete or applying tiles is performed from the viewpoint of makeup and prevention of concrete deterioration. However, in recent years, the exfoliation of exterior walls has been raised as a social problem in building construction, and there has been a tendency to show high interest in designs utilizing the texture of materials. The exposed concrete finish with a solid feeling is being reviewed.

However, the bare concrete finish is
Inconvenient steps may occur on the casting surface due to poor construction accuracy of the formwork used during casting, and unnecessary irregularities may occur due to the lack of concrete when the mold is removed from the mold. After the mold is released, some surface repair is often performed. The color tone of the concrete surface after surface repair does not usually match the color tone of the surrounding concrete surface,
Some measures are taken for color matching. Also,
Even when the construction accuracy of the formwork is high, since the surface color tone is different due to natural environment changes such as temperature and humidity at the time of concrete casting, in order not to lower the design feeling,
Some means is provided to match the color of the other concrete surface.

Further, in the case of a building that has been finished with bare concrete, since cement is exposed, the cement is neutralized by carbon dioxide gas, acid rain and other various factors, and the bonding force is reduced, and the surface of the cement is reduced. In a degraded state in which the sliding material comes off. Such concrete surfaces will be repaired, but even at this time, the color tone of the repaired concrete surface and the conventional concrete surface do not usually match, and some kind of color adjustment is necessary to make them match Becomes

[0005] As a method of forming the exposed concrete surface for performing the above-mentioned surface repair and color matching, the exposed concrete surface is repaired as necessary, and then a white cement, a polymer emulsion, a colorant and water are mixed. After applying the material and leaving it for a day to cure,
There has been proposed a surface forming method in which a material obtained by mixing a coloring material, a polymer emulsion, and water is applied using a roller formed by winding cotton on a roller made of chemical fiber such as wool (particularly, Japanese Patent Laid-Open No. 2004-157572). JP-A-8-42096).

[0006]

The present inventors adjusted the color of the exposed concrete surface by the above-mentioned surface forming method. However, the application pattern by the roller was monotonous, and the natural concrete exposed surface pattern was changed. It was difficult to create. In addition, it is difficult to adjust the subtle color change at the joint between the existing concrete surface and the repaired concrete surface in a stepless manner, and there is a certain level of color difference at the joint between the existing portion and the repaired portion. It was difficult to avoid occurring.

An object of the present invention is to provide a method of patterning a concrete surface which avoids the above-mentioned inconvenience caused by roller coating, and an apparatus therefor.
More specifically, regardless of the color tone of the surrounding exposed concrete surface, a new concrete surface that can adjust the color tone of the repaired surface with a pattern similar to that and continuous color tone change It is an object to provide a patterning method and an instrument therefor.

[0008]

In order to solve the above-mentioned problems, a method for patterning a concrete surface according to the present invention comprises, after repairing the exposed concrete surface as required, at least white cement and polymer. A base material in which an emulsion and water are mixed is applied, and after the base material is dried, a material in which at least a colorant, a polymer emulsion, and water are mixed, and has a darker color than the base material. It is characterized in that the required patterning is carried out on the concrete surface by applying the finishing material by means of a patterning tool whose surface is covered with felt, preferably by pressing. Preferably, the patterned concrete surface is subjected to waterproofing or water-repellent treatment. Moreover, the instrument for patterning a concrete surface according to the present invention is characterized in that the surface of the base material is covered with felt.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, the exposed concrete surface to be treated is concrete of a concrete building made by casting concrete using a conventional formwork and removing the formwork after hardening. This includes not only the exposed surface, but also the exposed concrete surface in factory-manufactured concrete panels such as lightweight foamed concrete (ALC) boards. In the latter case, a large number of concrete panels are erected at the construction site to constitute the wall surface of the building, and the concrete surface portion such as the wall surface thus constructed is also referred to as the exposed concrete surface according to the present invention. Is configured.

[0010] Unnecessary steps and missing portions usually exist on the exposed concrete surface. In addition, dirt and impurities are also attached. Prior to the work, cut off the part where the concrete skeleton is stuck, and remove the fragile part in the case of Janka (bean board). The stains and impurities on the base are removed, and the defective portion and the step portion are corrected using a repair mortar. In FIG. 1, a portion 10 indicates the surface that has been repaired in this manner.

Next, a base material is applied thereon.
The base material preferably has a lighter color than the repaired exposed concrete surface 10, and includes a cement material composed of white Portland cement and ordinary cement, optionally mixed calcium carbonate powder, polymer emulsion. , Water, and a coloring material such as an emulsion paint mixed as necessary. When the color tone of the base material is too white, unevenness occurs in the color tone after patterning described later. for that reason,
A colorant is mixed to adjust the color tone of the base material. As the colorant, a black color is usually used, but a mixture of other colors may be used. The polymer emulsion is preferably an acrylic or EVA emulsion, but may be a rubber such as styrene butadiene rubber (SBR). The coating may be performed by a normal coating means such as brush coating. In FIG. 1, a portion 20 indicates a surface on which the base material is applied in this manner.

After the base material has dried, the finishing material is applied over it. The finishing material is a material obtained by mixing at least a coloring material, a polymer emulsion, and water, and has a darker color than the base material. The coloring material may be a black emulsion paint or the like, and a mixture of other colors may be used. However, the amount and type of the colorant are selected so as to have a darker color tone than the base material. This coloring material mainly expresses a shadow generated on the exposed concrete surface, and may be appropriately adjusted according to the color tone of the surface of the cast concrete at the construction site. The polymer emulsion may be the same as that used for the base material.

As shown in FIG. 3, an operator applies the finishing material by pressing it over the dried base material 20 using a patterning tool 50 as shown in FIG. The patterning device 50 includes a substrate 51.
Is covered with a felt base 52, and a gripping body 53 is provided on the back surface. The base material 51 may be a plate material,
Synthetic resin foam, such as expanded polystyrene, is a preferred material because it is lightweight and has moderate elasticity and strength. In addition, a material such as a sponge material that easily undergoes compression deformation by pressurization and returns to its original shape by decompression can be effectively used as a base material.

[0014] The felt ground is made by entanglement of fibers or a cloth made by applying moisture, heat and pressure to form a cloth.
Hemp, cotton, etc. are used. Felt grounds are very flexible,
The thickness is indefinite and the surface has indefinite irregularities and has no directionality. It is also excellent in hygroscopicity. For this purpose, the felt material of the patterning device 50 is immersed in the liquid finishing material described above, and then applied by pressing the dried base material on the base material.
As shown in FIG. 3 and reference numeral 30 in FIG. 3, a finished surface is obtained in which the surface of the base material 20 is provided with a pattern having a peculiar surface pattern and color tone of the exposed concrete surface.

By adjusting the pressing pressure or the number of pressings by the operator, the area of the part where the finishing material is applied thickly and the area of the part where the finishing material is applied thinly can be easily adjusted, and the surrounding concrete exposed surface can be adjusted. Optimal patterning can be easily performed while observing the surface pattern and color tone possessed by. In addition, by changing the number and the direction of the pressing application (the pressing direction of the patterning device 50), the degree of the shadow can be easily adjusted. For this reason, it is possible to easily give a stepless color change at the boundary between the existing concrete surface and the repaired concrete surface, and a more natural concrete-exposed surface is formed. The pattern formed in this way has the same natural beauty and solid feeling as the naturally formed exposed concrete surface.

After drying the patterned finishing material,
By applying a water-absorbing agent using a roller for surface protection, the method of patterning a concrete surface is completed. The water absorption preventing agent may be one used in the conventional method, for example, Landex Coat (manufactured by Dainichi Giken Co., Ltd.).

[0017]

According to the present invention, a pattern very similar to the pattern of the surrounding exposed concrete surface can be easily applied to the repaired concrete surface. Also,
The joint between the existing concrete surface and the repaired concrete surface can also be given a pattern as a continuous color tone in a natural state.

[Brief description of the drawings]

FIG. 1 is a view showing a state of a concrete surface in each construction process of a method for patterning a concrete surface according to the present invention.

FIG. 2 is a perspective view showing an example of a tool for patterning a concrete surface according to the present invention.

FIG. 3 is a diagram for explaining a construction process of a method for patterning a concrete surface according to the present invention.

[Explanation of Signs] 10 ... Released concrete exposed surface, 20 ...
Concrete surface with base material applied, 30 ... Concrete surface with finish material applied and patterned, 50
... patterning equipment, 51 ... base material, 52 ... felt ground,
53 ... gripping body

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Katsusuke Hirayama, Inventor 3-34-47 Hayabuchi, Tsuzuki-ku, Yokohama-shi, Kanagawa

Claims (3)

[Claims] 1. After concrete is repaired on the exposed concrete surface, a base material obtained by mixing at least a white cement, a polymer emulsion and water is applied, and after the base material is dried, Applying a finishing material having at least a colorant, a polymer emulsion, and water and having a color tone darker than that of the base material, preferably by pressing with a patterning device whose surface is covered with felt. A method for patterning a concrete surface, comprising the steps of: 2. The patterned concrete surface is subjected to a waterproof or water-repellent treatment.
The method of patterning the concrete surface as described. 3. An apparatus for patterning a concrete surface, characterized in that the surface of the substrate is covered with a felt base.