JPH0679712A - Coloring method for concrete product - Google Patents

Abstract

PURPOSE:To manufacture a concrete product without peeling, discoloring and fading of a colored part caused by the elapse of time by the method, wherein coloring work can be performed in the manufacturing process. CONSTITUTION:Concrete 2 is set. A coloring material 4 comprising epoxy resin, color ceramic aggregate, natural stone, color sand and the like is pushed on the surface of the concrete 2. The colored part is covered with heat insulating material, and steam curing is performed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for coloring a concrete product which can be colored during the manufacturing process of the concrete product and which is free from peeling, discoloration or discoloration of the colored part over time.

[0002]

2. Description of the Related Art Conventionally, as a method for coloring a concrete product, a method shown below and shown in FIG. 1 has been known. Method Using Paint A masking material is applied to a portion of the concrete surface other than the colored portion, the paint is applied, the coating material is dried, and then the masking material is peeled off to obtain a product. Method of Bonding Color Ceramic Aggregate A partition formwork is attached to the concrete surface, and a coloring material prepared by kneading the color ceramic aggregate is sprinkled and pressure-bonded, followed by drying to release the partition formwork to obtain a product.

[0003]

However, in the above-mentioned conventional methods, as shown in FIG. 1, it takes time to obtain a product. That is, also in the method and method described above, since the one that is cured and demolded after pouring concrete is used, about one day time is required at that time. Then, in the method of (1), it takes another day to apply a masking material as a coloring treatment, apply a paint and dry it, and it takes 3 days in total to remove the masking material and obtain a product. And In addition, also in the method of (1)
1 more to knead the colorant, sprinkle it and dry
It took a lot of time, and it took 3 days in total to remove the partition formwork and obtain the product.

Further, especially in fiber reinforced concrete,
Since the fibers were projected on the concrete surface, the coloring treatment work was extremely difficult in any of the above methods.

In addition, in the method (1), depending on the paint used (or the pigment used therefor), peeling, discoloration or fading may occur over time.

[0006] Therefore, there has been a demand for a method for producing a concrete product which can obtain a product in a shorter time and which does not cause peeling, discoloration, or discoloration of a colored portion over time.

[0007]

SUMMARY OF THE INVENTION The present invention has been proposed in view of the above, in which concrete is cast, and the surface of the concrete is colored with epoxy resin and color ceramic aggregate, natural stone, color sand or the like. The present invention relates to a method for coloring a concrete product, characterized in that a colored portion is covered with a heat insulating material and steam cured after the material is pressure-bonded.

[0008]

EXAMPLE A method for coloring a concrete product of the present invention will be described with reference to the examples of the drawings. First, as shown in FIG. 2 (A), the soundproofing concrete 2 was placed in the product form 1 by a normal pouring method (the shape and dimensions are shown in FIG. 3). Next, as shown in FIG. 2 (B), the partitioning mold 3 for the coloring material was fixed to the surface of the concrete 2 cast. 100 parts by weight of color ceramic aggregate (manufactured by Japan Ceraway Development Co., Ltd., “Daola Rec”) and epoxy adhesive (manufactured by Japan Ceraway Development Co., Ltd., “Epocera EL”)
—White ”) and 7 parts by weight to prepare a coloring material 4. The kneading colorant 4 was evenly dispersed in the partitioning mold 3 to such an extent that the concrete surface could not be seen, and this was evenly tapped and pressure-bonded with a gold iron to finish flat. The colored part is 9
The size was 95 mm × 220 mm and the thickness was 3 to 7 mm. Then, the above-mentioned colored portion was covered with a heat insulating material 5 (“Kanelite Foam (Type B heat insulating plate type 1)” manufactured by Kanegafuchi Chemical Industry Co., Ltd.), and steam curing was performed. The steam curing conditions are as shown in FIG. 4, and the maximum temperature was 40 to 60 ° C. and the duration was 2 to 4 hours. Finally, as shown in FIG. 2 (C), the partition form 3 and the product form 1 were released from the mold to obtain a product 6.

The product 6 obtained was subjected to various quality characteristic tests. The test contents are shown in Tables 1 and 2 together with the test results.

[0010]

[Table 1]

[0011]

[Table 2]

[0012]

As described above, in the coloring method of the present invention, a step of press-bonding a coloring material is added between the placing and the curing in the ordinary concrete product manufacturing process to insulate the colored portion during the curing. Since it is covered with a material and does not change at all in time from the usual concrete product manufacturing process, the product can be obtained in an extremely short time compared to the conventional method. Further, the specific work is kneading and scattering of the coloring material, pressure bonding, and laying of the heat insulating material, and does not include particularly troublesome work. Moreover, even when the fiber-reinforced concrete is cast, the coloring material is sprayed and pressure-bonded before hardening, so that the fibers protruding to the surface do not easily tilt and the work is troublesome. Furthermore, since the heat insulating material is used during steam curing, there is no discoloration of the epoxy resin during curing due to moisture or temperature changes.

The concrete product thus obtained does not undergo discoloration or fading over time because it uses ceramic aggregate, natural stone, color sand or the like in the colored portion. Moreover, since the coloring material is pressure-bonded before the concrete is hardened, the colored portion does not peel off with time.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a comparison between a coloring method of the present invention and two conventional coloring methods.

FIG. 2 is a side sectional view showing a manufacturing process of the present invention.

FIG. 3 (A) is a side view showing the dimensions of concrete in the example of the present invention, and (B) is a plan view thereof.

FIG. 4 is a graph showing steam curing conditions in an example of the present invention.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Keiichi Saito Inventor Keiichi Saito 1-1-1, Gobashi, Aoba-ku, Sendai City, Miyagi Prefecture East Japan Railway Company Tohoku Construction Office Construction Management Office (72) Inventor Genichi Watanabe Fukushima 6-1 Otamachi, Fukushima City, Fukushima Prefecture East Japan Railway Company Tohoku Construction Office, Fukushima Construction Zone (72) Inventor Kaoru Ono 6-1 Otamachi, Fukushima City, Fukushima Prefecture East Japan Railway Company Tohoku Construction Office, Fukushima Construction Zone (72) Inventor Manzo Ozawa 1-7-16 Kamikoido, Suginami-ku, Tokyo Ozawa Concrete Industry Co., Ltd.

Claims (1)

[Claims] 1. A concrete is poured, a coloring material composed of epoxy resin and color ceramic aggregate, natural stone, color sand, etc. is pressure-bonded to the surface of the concrete, and then the coloring portion is covered with a heat insulating material to be steam-cured. The method for coloring concrete products is characterized in that