JPH0679709A - Coloring method for concrete product - Google Patents

Abstract

PURPOSE:To manufacture concrete product without peeling, discoloring and fading of the colored part caused by the elapse of time by the method wherein coloring work can be performed during the manufacturing process. CONSTITUTION:Concrete 2 is set. A porous ceramic plate 3 comprising epoxy resin, which is molded beforehand, color ceramic aggregate, natural stone, color sand and the like is pushed on the surface of the concrete 2 and cured.

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 problems, and concrete casting is performed, and an epoxy resin and a color ceramic aggregate or natural stone, a color sand, etc. which are pre-molded on the surface of the concrete are provided. The present invention relates to a method for coloring a concrete product, characterized in that a porous ceramic plate made of (4) is pressure-bonded for curing.

[0008]

EXAMPLE A method for coloring a concrete product of the present invention will be described with reference to the examples of the drawings. A porous ceramic plate was molded in advance as follows. 100 parts by weight of color ceramic aggregate (Nippon Seraway Development Co., Ltd., "Daoralek") and 7 parts by weight of epoxy adhesive (Nippon Seraway Development Co., Ltd., "Epocera EL-White") were kneaded, and then porous. It is cast on a mold for ceramic plate (not shown) and has a thickness of 995 mm × 220 mm and a thickness of 10 to 1.
A 5 mm porous ceramic plate 3 was molded. 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, the porous ceramic plate 3 described above was pressure-bonded to the surface of the concrete 2. afterwards,
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 product form 1 was demolded to obtain a product 4.

Various physical property tests were performed on the obtained product 4. 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, the coloring method of the present invention adds the step of crimping the preformed porous ceramic plate between the placing and curing in the usual concrete product manufacturing process. In terms of time, it is completely the same as the manufacturing process of a normal concrete product, so that the product can be obtained in an extremely short time compared to the conventional method.
Further, the specific work includes forming a mold, kneading and placing an epoxy resin and a color ceramic aggregate, drying and demolding, and does not include particularly troublesome work. Moreover, even when the fiber-reinforced concrete is cast, the porous ceramic plate is pressure-bonded before hardening, so that the fibers protruding to the surface are not easily tilted and the work is troublesome.

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. Further, since the coloring material is pressure-bonded before the concrete is hardened, the concrete cast into the fine voids on the surface of the porous ceramic plate does not bite and the colored portion does not peel off with time. Further, since the coloring in the present invention is performed during the molding of the porous ceramic plate, there are many variations in the pattern, and for example, the colored pattern can be formed three-dimensionally.

[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 (51) Int.Cl. ⁵ Identification number Internal reference number FI technical display location C04B 14:02) Z 2102-4G (72) Inventor Keiichi Saito 1 Gotsubashi, Aoba-ku, Sendai City, Miyagi Prefecture 1-1-1 East Japan Passenger Railway Co., Ltd. Tohoku Construction Office Industrial Control Office (72) Inventor Genichi Watanabe 6-1, Ota-cho, Fukushima City, Fukushima Prefecture East Japan Railway Company Tohoku Construction Office Fukushima Construction Area (72 ) Inventor Kaoru Ono 6-1, Ota-cho, Fukushima-shi, Fukushima East Japan Railway Company Tohoku Construction Office Fukushima Works (72) Inventor Manzo Ozawa 1-7-16 Kamikoido, Suginami-ku, Tokyo Ozawa Concrete Industry Within the corporation

Claims (1)

[Claims] 1. Curing is performed by pouring concrete and press-bonding a porous ceramic plate made of epoxy resin and color ceramic aggregate, natural stone, color sand, etc., which have been preformed on the surface of the concrete. Characteristic concrete product coloring method.