JPH11192611A - Colored concrete block and coloring method for concrete block - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a colored concrete block which is mainly laid on a sidewalk or the like and to provide a coloring method for a concrete block. SOLUTION: Coloring material is mixed into at least one part of concrete material constituting a concrete block so as to become a desired color tone. Either coloring liquid 4 showing color of the same series as the color tone or coloring liquid 5 of achromatic color is osmosed on at least one surface of the concrete block and subtle color unevenness are formed on the surface of the concrete block. Coloring liquid 4 or 5 is osmosed on the surface of the concrete block and thereby subtle color unevenness are formed between the coloring liquid 4 or 5 and the color tone colored on the concrete block and also pigment of coloring liquid 4 or 5 is osmosed into the concrete block. Accordingly, color change caused by a surface flow such as abrasion is little and the colored concrete block is suitably used for a long period.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a colored concrete block mainly laid on a sidewalk or the like and a method for coloring a concrete block.

[0002]

2. Description of the Related Art Conventionally, as a method for coloring a concrete block, a pigment is generally kneaded into concrete,
A method of mixing a colored aggregate into concrete and exposing the aggregate by surface treatment to form a color or a method of applying a paint after molding and curing a concrete block is known. Japanese Patent Application Laid-Open No. Hei 3-147803 discloses a method of spraying a liquid pigment onto a partition plate of a mold, supplying a concrete material colored in a color different from that of the injected pigment into the mold, and forming the surface by vibration processing. A method for manufacturing a concrete block having a color changing pattern has been proposed.

[0003]

However, in the above-described method of mixing the pigment into the concrete, the entire concrete block has a uniform color tone, is hardly changed, and is artificial. There has been a problem that, when color shading is attempted, it is often very regular and unnatural. Further, in the coloring method of applying a paint after curing the concrete block, there is a problem that the coating film formed on the surface of the concrete block is weak against scratches and abrasion and easily peels off. Also, in the method proposed in Japanese Patent Application Laid-Open No. 3-147803, a small amount of the jetted liquid pigment adhered to the mold is formed on the surface of the concrete block only slightly adhered to the surface of the concrete block. There is a problem that the pigment layer to be used is brittle.

Accordingly, the present inventors have made intensive studies in view of the conventional drawbacks, and as a result, have proposed a highly durable concrete block in which fine color unevenness is formed on the surface of the concrete block.

[0005]

According to the first aspect of the present invention, at least a part of the concrete material constituting the concrete block is mixed with a coloring material so as to have a desired color tone. On at least one surface, a color liquid or an achromatic color liquid similar to the color tone is permeated, and a fine color unevenness is formed on the surface of the concrete block, and the color liquid permeates the surface of the concrete block. As the color tone of the concrete block and the color tone of the concrete block are delicately uneven, and the pigment of the coloring liquid penetrates into the concrete block, the color change due to surface defects such as abrasion is small and suitable for a long time. Used for The coloring material according to the present invention is not limited to a pigment, and a colored aggregate or the like may be used.

In the concrete block according to the second aspect of the present invention, in a concrete block having a surface layer formed on a surface of a base layer, a pigment is kneaded on the surface layer so as to obtain a desired color tone, and the surface of the surface layer is kneaded. A coloring liquid having a similar color to the color tone and an achromatic coloring liquid are applied, and these coloring liquids penetrate into the surface layer, and fine color unevenness is formed on the surface layer of the concrete block, and the coloring liquid penetrates into the surface layer. do it,
As subtle color unevenness is formed between the color tones colored on the surface layer and the pigment of the coloring liquid penetrates into the surface layer,
The color change due to surface defects such as abrasion is small and it is preferably used for a long time. The base layer is generally made of a high-strength compound, the surface layer is usually made of a high-density compound, and the surface of the concrete block is made beautiful.

According to a third aspect of the present invention, there is provided a method for coloring a concrete block, wherein a surface layer having a desired color tone is produced from a cement mortar mixed with a pigment, and a color liquid having a similar color to the color tone is formed in an uncured state. A is applied,
Since the achromatic coloring liquid B is applied, and the coloring liquid A is applied again at substantially the same time and then cured and colored on the surface of the concrete block, the coloring liquid is applied in a state where the surface layer is uncured. The coloring liquid easily penetrates into the surface layer, and the inside of the surface layer is easily colored.

The colored concrete block according to the fourth aspect of the present invention is a concrete block having a textured stone pattern formed on the surface of the surface layer. Subtle color unevenness occurs on the surface layer.

In the method for coloring a concrete block according to claim 5 of the present invention, a surface layer having a stone-patterned unevenness on the surface is formed from a cement mortar mixed with a pigment in a desired color tone. In the cured state, a coloring liquid A having a similar color to the above-mentioned color tone is applied, followed by an achromatic coloring liquid B
Is applied and cured at the same time as the coloring liquid A is applied again and cured, and the surface of the concrete block is colored. Subtle color unevenness occurs.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. Reference numeral 1 denotes a surface layer, which is formed on the surface of the base layer 2. The surface layer 1 is made of a cement mortar containing a mixture of cement, silica sand, a pigment, an admixture and water,
The surface density is high and beautiful. As the cement used for the surface layer 1, ordinary cement such as portland cement or early-strength cement is used as appropriate. However, if white cement is used, the color tone becomes beautiful and more preferable. Silica sand has a smaller particle size than ordinary sand, and the surface of the surface layer 1 has no unevenness and is smooth and beautifully finished. The pigment is added in a small amount so as to have a light color tone similar to the color tone to be given to the surface of the concrete block, so that the color tone formed by the coloring liquid does not become so uneven.

The base layer 2 is made of concrete made of cement, gravel, sand, an admixture and water, and has a high strength. Since the surface layer 1 is formed on the surface of the base layer 2, the base layer 2 is formed as an invisible part. The strength is more important than the aesthetic appearance, and an aggregate having a large particle size such as gravel is used.

In this method for producing a concrete block, first, a kneaded mixture of cement, gravel, sand, an admixture material and water, which constitutes the base layer 2, is charged into a mold, and is vibrated to uniformly fill the mold. , Cement, quartz sand,
The kneaded product of the pigment, the admixture and the water is poured onto the base layer 2, and the mixture is vibrated to uniformly fill the mold, the surface is pressurized, the mold is removed, and the mold is removed. The demolded concrete block is placed on a plate, placed on a belt conveyor 3, transferred to a coating booth, and sprayed with a dark colored liquid A4 having a color tone similar to the color of the surface layer 1, Subsequently, the achromatic coloring liquid B5 is applied, and the coloring liquid A4 is applied again.

The dark colored liquid A4 comprises a pigment having a hue to be colored on the concrete block, a penetrant, an emulsion resin and water, and is easily penetrated into the surface layer 1 of the concrete block. The pigment is used by appropriately blending the pigment with a desired color such as green, gray, yellow, orange, light gray, or brown, which is to be colored on the concrete block. The penetrant is an aid for facilitating the penetration of the pigment and the emulsion resin into the surface layer 1 of the concrete block, and a nonionic surfactant or the like is suitably used. Since the pigment penetrates into the surface layer 1 of the concrete block together with the resin, the pigment has excellent durability.
Further, since the pigment penetrates into the inside of the surface layer 1,
Even if the concrete block is scratched or chipped, the color tone of the concrete block is hardly impaired.

The achromatic coloring liquid B5 has a constant light gray irrespective of the hue to be colored on the concrete block, and the composition other than the pigment is the same as the coloring liquid A4. Since the coloring liquid B5 and the coloring liquid A4 are applied to the surface layer 1 of the concrete block substantially at the same time, the two liquids are appropriately mixed on the surface of the surface layer 1 to form suitable color unevenness.

[0015]

As described above, in the colored concrete block according to the first aspect of the present invention, a coloring material is mixed into at least a part of the concrete material constituting the concrete block so as to have a desired color tone. On at least one surface, a color liquid or an achromatic color liquid similar to the color tone is permeated, and a fine color unevenness is formed on the surface of the concrete block, and the color liquid permeates the surface of the concrete block. As the color tone of the concrete block and the color tone of the concrete block are delicately uneven, and the pigment of the coloring liquid penetrates into the concrete block, the color change due to surface defects such as abrasion is small and suitable for a long time. Used for

The concrete block according to the second aspect of the present invention is a concrete block having a surface layer formed on the surface of a base layer, wherein the surface layer is kneaded with a pigment so as to have a desired color tone, and A coloring liquid having a similar color to the above-mentioned color and an achromatic coloring liquid are applied to the surface, and these coloring liquids penetrate into the surface layer, and subtle color unevenness is formed on the surface layer of the concrete block. Penetrates into the surface layer to form delicate color unevenness between the color tone and the colorant, and the pigment of the coloring liquid penetrates into the surface layer. It is preferably used. The base layer is generally made of a high-strength compound, and the surface layer is generally made of a high-density compound, so that the surface of the concrete block is beautiful and high strength is imparted by the high-strength compound of the base layer.

According to a third aspect of the present invention, there is provided the method for coloring a colored concrete block, wherein a surface layer having a desired color is produced from a cement mortar in which a pigment is kneaded, and the surface layer has a similar color to the color in an uncured state. Of the coloring liquid A is applied,
Subsequently, an achromatic coloring liquid B is applied, and the coloring liquid A is applied again almost at the same time and then cured, and the surface of the concrete block is colored, and the surface layer is in an uncured state.
Since the coloring liquid is applied, the coloring liquid easily penetrates into the surface layer, and the inside of the surface layer is easily colored.

The colored concrete block according to the fourth aspect of the present invention is a concrete block in which stone-surface irregularities are formed on the surface of the surface layer. Subtle color unevenness occurs on the surface of the block.

In the method for coloring a concrete block according to a fifth aspect of the present invention, a surface layer having a stone-patterned unevenness is formed on a surface thereof in a desired color tone from a cement mortar mixed with a pigment. In the uncured state, a coloring liquid A having a color similar to the color tone is applied, subsequently, an achromatic coloring liquid B is applied, and the coloring liquid A is applied again almost at the same time. The difference in the degree of penetration of the coloring liquid occurs due to the unevenness of the stone texture, and subtle color unevenness occurs on the surface layer of the concrete block.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an example of an embodiment of a colored concrete block of the present invention.

FIG. 2 is a side view showing an example of steps of a method for coloring a concrete block according to the present invention.

FIG. 3 is a side view showing a step subsequent to the step of FIG. 2;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Surface layer 2 Base layer 3 Belt conveyor 4 Coloring liquid A 5 Coloring liquid B

Claims (5)

[Claims] 1. A coloring material is mixed into at least a part of a concrete material constituting a concrete block so as to have a desired color tone, and at least one surface of the concrete block has a coloring liquid or an achromatic color similar to the color tone. A colored concrete block, characterized in that the coloring liquid of the above is permeated and subtle color unevenness is formed on the surface of the concrete block. 2. In a concrete block having a surface layer formed on a surface of a base layer, a pigment is kneaded on the surface layer so as to have a desired color tone, and a coloring liquid having a similar color to the color tone is formed on the surface of the surface layer. A colored concrete block in which an achromatic coloring liquid is applied, and the coloring liquid penetrates into a surface layer to form subtle color unevenness on the surface layer of the concrete block. 3. A surface layer having a desired color tone is produced from a cement mortar mixed with a pigment, and a color liquid A having a similar color to the color tone is applied in an uncured state to the surface layer, followed by achromatic coloration. A method for coloring a concrete block, comprising applying a liquid B, applying a coloring liquid A again almost at the same time, curing the liquid, and coloring the surface of the concrete block. 4. The colored concrete block according to claim 1, wherein stone surface pattern irregularities are formed on the surface of the surface layer. 5. A surface layer having a stone-patterned irregularity formed on the surface thereof in a desired color tone from a cement mortar in which a pigment is kneaded, and a coloring liquid having a similar color to the color tone in an uncured state. A, followed by application of an achromatic coloring liquid B, curing of the coloring liquid A substantially at the same time as applying the coloring liquid A again, and coloring the surface of the concrete block. .