JPH10113918A - Concrete block for decorative building material, decorative mortar for making the same, and manufacture thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a beautiful concrete block for a decorative building material to be formed by a simple production process by forming a decorative cured mortar layer in which rubber chips are dispersed on the surface of the block. SOLUTION: In a concrete block 10 for decorative building material in which a marble pattern is created artificially, a decorative cured mortar layer in which rubber chips 13 are dispersed is formed on the surface of a concrete block 11. The rubber chips 13 can be obtained easily, and a marble pattern can be made by the use of black chips 13. Since the specific gravity of the rubber chips 13 is close to that of cement, rapid cure admixture, powder additives, and the chips 13 are powder, they can be easily mixed with cement etc., by an ordinary concrete mixer and can be dispersed uniformly in mortar. The incorporation of the rubber chips 13 into mortar hinders the separation of components by the vibration of a pump when mortar is sent by the pump.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete block for decorative building materials in which a marble pattern is artificially produced, a decorative mortar for producing the same, and a method for producing the same.

[0002]

2. Description of the Related Art Conventionally, as a method for producing this type of concrete block for decorative building materials, in addition to various seed stones, beautiful shells and ores are pulverized to required sizes and added to the various seed stones. A mixture of the ingredients is added, cement is added thereto, an appropriate amount of water is added, and the mixture is stirred and kneaded. Then, the mixture is filled in a molding form, solidified, demolded, and polished to form a mixed aggregate. There has been proposed a method of expressing a unique pattern, pattern, luster, etc. to enhance the degree of makeup (Japanese Patent Laid-Open No. 52-12791).
4).

[0003]

However, in this method, in order to prepare a ready-mixed concrete for cosmetics, it is necessary to grind beautiful shells and ores into required sizes and to add them to various seeds. There is. Beautiful shells and ores have the drawback that they are difficult to obtain. An object of the present invention is to provide a concrete block for decorative building material which is rich in aesthetic appearance. Another object of the present invention is to provide a cosmetic mortar in which raw materials are easily available. Still another object of the present invention is to provide a manufacturing method capable of obtaining a beautiful concrete block for decorative building materials by a simple manufacturing process.

[0004]

The invention according to claim 1 is
As shown in FIG. 1, a concrete block 10 for decorative building material has a decorative mortar layer 14 in which rubber chips 13 are scattered on the surface of the concrete block 11. The cosmetic mortar layer 14 on which the readily available rubber chips 13 are scattered exhibits an aesthetic appearance. If black rubber chips are used, the pattern will be marble.

[0005] The invention according to claim 2 is a cosmetic mortar obtained by mixing cement, rubber chips, a quick-setting admixture, a powder additive, and water. The rubber chips are close to the specific gravities of the cement, the quick-hardening admixture, and the powder additive, and since it is a powder, it is easily mixed with the cement or the like in a short time using an ordinary concrete mixer and uniformly dispersed in the mortar. Further, by including the rubber chips, the separation resistance of each component of the mortar is improved, and when the mortar is pumped by a pump, the components are hardly separated due to vibration of the pump or the like. Thereby, mortar can be pumped in the same stable state as at the time of preparation.

The invention according to claim 3 is the invention according to claim 2, which is a cosmetic mortar further containing fine aggregate.
By further including fine aggregate, the content of cement can be reduced, whereby the calorific value after mortar injection is reduced and the shrinkage rate upon curing is reduced.

The invention according to claim 4 is the invention according to claim 2 or 3, which is a cosmetic mortar further containing either an AE (air-entraining) agent or a foaming agent. By further containing an AE agent or a foaming agent, fine bubbles are dispersed in the mortar during the mortar preparation and entrained in the cement or cement and fine aggregate, whereby the specific gravity of the rubber chip is approximated to that of another cement or the like. I will be.

According to a fifth aspect of the present invention, as shown in FIG. 2 (a), the first concrete block 11 and the second concrete block 12
The gap 15 is surrounded by a mold 16, and as shown in FIG. 2 (b), the cement 15, the rubber chip, the quick-setting admixture, and the powder additive are filled in the gap 15 surrounded by the mold 16. Mortar 14a obtained by mixing water and water is injected, and after this cosmetic mortar 14a is hardened, FIG.
As shown in FIG. 2 (c), the method for manufacturing a decorative building material concrete block in which the decorative mortar hardened body 14 is cut or broken at the center of the decorative mortar hardened body 14 as shown in FIG. is there. By cutting or breaking the hardened decorative mortar body 14 at the center of the hardened decorative mortar body 14, a mortar section in which rubber chips 13 are scattered appears as shown in FIG. Is obtained.

According to a sixth aspect of the present invention, a formwork 17 is arranged on the surface of the concrete block 11 as shown in FIG. 3 (a), and cement is contained in the formwork 17 as shown in FIG. 3 (b). A cosmetic mortar 14a formed by mixing a rubber chip, a quick-setting admixture, a powder additive, and water is injected, and after the cosmetic mortar 14a has hardened, the mold is removed as shown in FIG. As shown in FIG. 3D, this is a method for manufacturing a concrete block for decorative building material in which the surface of the hardened decorative mortar 14 is polished or part of the hardened decorative mortar 14 is cut off. By polishing the surface of the hardened decorative mortar body 14 or cutting off a part of the hardened decorative mortar body 14, a mortar section in which the rubber chips 13 are dotted appears as shown in FIG. A concrete block 10 is obtained.

The invention according to claim 7 is the invention according to claim 5 or 6, wherein the decorative mortar is a method for manufacturing a concrete block for decorative building material further including fine aggregate. By further including fine aggregate, the content of cement can be reduced, whereby the calorific value after mortar injection is reduced and the shrinkage rate upon curing is reduced.

The invention according to claim 8 is the invention according to claims 5 to 7
An invention according to any one of the above, wherein the cosmetic mortar is a method for producing a concrete block for decorative building material further including either an AE agent or a foaming agent. By further containing an AE agent or a foaming agent, fine bubbles are dispersed in the mortar during the mortar preparation and entrained in the cement or cement and fine aggregate, whereby the specific gravity of the rubber chip is approximated to that of another cement or the like. I will be.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION In the concrete block for decorative building material according to claim 1, the average thickness of the hardened decorative mortar layer from the block surface is 5 to 50 mm. Preferably 20
３０30 mm. If it is less than 5 mm, the surface of the concrete block may be exposed after being used as a building material, and if it is more than 50 mm, mortar for makeup is wasted and is not economical. The cosmetic mortar according to any one of claims 2, 5, and 6 has a weight ratio of 2 parts per 100 parts by weight of cement.
0 to 80 parts by weight of a rubber chip, 3 to 50 parts by weight of a fast-curing admixture, 1 to 10 parts by weight of a powder additive, 50 to 7 parts by weight
It is prepared by mixing 0 parts by weight of water. The cosmetic mortar according to claims 3, 7 and 8 is characterized in that, based on 100 parts by weight of cement, 20 to 80 parts by weight of rubber chips, 3 to 50 parts by weight of a quick-setting admixture, 10 parts by weight of a powder additive, and 50 to 150 parts by weight of fine aggregate,
It is prepared by mixing 60 to 80 parts by weight of water. Claim 4
And the cosmetic mortar according to claim 8, 20 to 80 parts by weight of rubber chips with respect to 100 parts by weight of cement,
3 to 50 parts by weight of a fast-curing admixture, 1 to 10 parts by weight of a powder additive, 50 to 150 parts by weight of fine aggregate,
It is prepared by mixing 01 to 2 parts by weight of an AE agent or a foaming agent with 60 to 80 parts by weight of water.

According to claims 2 to 8, the preferred content of the rubber chips is 40 to 60 parts by weight, the preferred content of the quick-hardening admixture is 5 to 30 parts by weight, and the preferred content of the powder additive is It is 2 to 5 parts by weight. In claim 3, claim 7, and claim 8, the preferable content of the fine aggregate is 100 to 150 parts by weight. Further, in claim 4 and claim 8, the preferable content of the AE agent or the foaming agent is 0.1.
2 to 0.5 parts by weight.

When the content of the rubber chip is out of the above range, it is difficult to obtain an aesthetic appearance on the surface of the hardened cosmetic mortar layer. When the content exceeds the upper limit, the strength of the hardened cosmetic mortar layer is lowered. If the rapid-curing admixture is less than the lower limit, a sufficient rapid-curing effect cannot be obtained, and if it exceeds the upper limit, a problem of premature curing occurs. If the AE agent or the foaming agent is less than the lower limit, the desired performance is not exhibited. If the AE agent or the foaming agent exceeds the upper limit, the cosmetic mortar may be excessively foamed and the strength may be reduced.

Each material will be described in detail through the cosmetic mortar according to the second to eighth aspects. The cement of the present invention includes (A) Portland cements such as ordinary Portland cement, early-strength Portland cement, ultra-high-strength Portland cement, moderate heat Portland cement, sulfate-resistant Portland cement, belite cement, white Portland cement, and the like. ) Blast furnace cement, fly ash cement, silica cement, mixed cement such as silica fume cement, (c) special cement such as calcium aluminate-based special cement, alumina cement, ultra-rapid hardening cement, (d) soil stabilizing cement, etc. . The above cements (A) to (D) may be used alone or in combination of two or more.

The rubber chip of the present invention has an average particle size of about 0.5 to 1 mm and a specific gravity of about 1.1 to 1.2. This rubber chip is made, for example, by finely grinding a waste tire. When a waste tire is finely pulverized to produce a rubber chip, the hardened cosmetic mortar layer can be differentiated by the color of the waste tire. For example, a general cosmetic mortar hardened layer uses a rubber chip 微 which is finely pulverized from black, blue and other dark colored waste tires, and a special cosmetic mortar hardened layer that is visually emphasized is white, red, green, It is possible to use a rubber chip 粉 砕 obtained by finely pulverizing a waste tire having a high lightness or saturation such as brown. Alternatively, a dark-colored rubber chip may be used for a special hardened mortar layer, and a rubber chip having a high lightness or saturation may be used for a general hardened mortar layer.

The fast-setting admixture of the present invention comprises 20 to 70 parts by weight of Portland cement or mixed cement, 10 to 30 parts by weight of type II anhydrous gypsum, 20 to 50 parts by weight of steelmaking slag, and the total weight of these components. A fine powder mixture (rapid-hardening cement described in JP-A-62-260749), which is added with a setting retarder in an amount of 0.5 to 5 parts by weight and pulverized to a specific surface area of 3500 cm ² / g, portland cement or mixed cement 100 to 100 parts by weight of 10 to 70 parts by weight of stainless steel slag, 4 to 40 parts by weight of type II anhydrous gypsum, by-product of aluminum used in the deoxidizing step of the stainless steel refining process, and an organic set retarder such as tartaric acid After mixing with 0.5 to 5 parts by weight of a setting retarder comprising an alkali carbonate such as sodium, the mixture is pulverized (Japanese Patent Application Laid-Open No. 6-321607). Or a commercially available calcium aluminate-based quick-setting material.

The powder additives of the present invention include a quick-setting regulator, an antifoaming agent, and aluminum powder. If the cosmetic mortar contains these powder additives,
For 100 parts by weight of cement, the quick setting modifier is 1 to 1
0 parts by weight, 0.01 to 2 parts by weight of an antifoaming agent, and 0.001 to 0.01 parts by weight of aluminum powder. Below these lower limits, the desired performance of each does not appear, and when it exceeds the upper limit, in the case of a quick-setting regulator, a curing delay occurs,
In the case of an antifoaming agent, the effect is small and the economy is low. If the amount of the aluminum powder exceeds the upper limit, the cosmetic mortar may be excessively foamed and the strength may be reduced. Examples of the quick setting modifier include a combination of an alkali carbonate and an oxycarboxylic acid, or a combination of an alkali carbonate and an oxycarboxylate. Examples of the alkali carbonate include sodium carbonate and potassium carbonate, examples of the oxycarboxylic acid include tartaric acid, citric acid, malic acid, and gluconic acid, and examples of the oxycarboxylate include the sodium salt and the calcium salt thereof. Further, the concrete block of the present invention is not limited to a generally used rectangular parallelepiped block as shown in FIG. 1, but also includes a retaining wall block.

[0019]

Next, embodiments of the present invention will be described. With respect to 100 parts by weight of ordinary Portland cement, 50 parts by weight of black rubber chips having the particle size shown in Table 1 and 25 parts by weight of the fine powder mixture described above as a quick-setting admixture were collected and placed in a Hobart mixer. Next, 1.8 parts by weight of a mixture of tartaric acid and sodium carbonate and 0.001 part by weight of a powder antifoaming agent (nonionic type) were collected as a quick-setting adjuster, put into the mixer, and finally 65 parts by weight of water were added. Placed in the mixer. The materials were uniformly mixed by this mixer to prepare a cosmetic mortar.

[0020]

[Table 1]

As shown in FIG. 2A, this cosmetic mortar was poured into a gap 15 between two concrete blocks 11 and 12 surrounded by a mold 16 and cured and hardened.
Three days after the injection, the mold 16 was removed as shown in FIG. 2 (c), and broken at a location shown by an arrow with a rag or the like. As a result, as shown in FIG.
Thus, a decorative building material concrete block 10 having a mortar hardened layer 14 for decoration, such as natural marble, on the surface of which is scattered 3 was obtained. The hardened decorative mortar layer 14 was firmly fixed to the concrete block 11.

[0022]

As described above, according to the present invention, it is possible to obtain an aesthetically pleasing concrete block for decorative building materials in which rubber chips are scattered. Particularly, since this rubber chip is easily available, it is possible to easily prepare a cosmetic mortar having low material separability. From this decorative mortar, a beautiful concrete block for decorative building materials can be made by a simple manufacturing process.

[Brief description of the drawings]

FIG. 1 is a perspective view of a concrete block for decorative building material of the present invention.

FIG. 2 is a diagram showing a manufacturing process of the concrete block for decorative building materials.

FIG. 3 is a view showing another manufacturing process of the concrete block for decorative building materials.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Concrete block for decorative building materials 11 1st concrete block 12 2nd concrete block 13 Rubber chip 14 Hardened mortar layer (hardened mortar for makeup) 14a Mortar for makeup 15 Gap 16 and 17 Formwork

Continued on the front page (51) Int.Cl. ⁶ Identification code FI C04B 16:04 18:22 24:04 22:10) 103: 10 103: 20 111: 54

Claims (8)

[Claims] 1. A concrete block for decorative building material having a hardened decorative mortar layer (14) in which rubber chips (13) are scattered on the surface of the concrete block (11). 2. A cosmetic mortar comprising a mixture of cement, rubber chips, a quick-setting admixture, a powder additive, and water. 3. The cosmetic mortar according to claim 2, further comprising fine aggregate. 4. The cosmetic mortar according to claim 2, further comprising one of an AE agent and a foaming agent. 5. A first concrete block (11) and a second concrete block (12) are arranged so that their surfaces face each other and have a gap (15), and the gap (15) is formed in a form (16). A cosmetic mortar (14a) obtained by mixing cement, a rubber chip, a quick-setting admixture, a powder additive, and water is poured into the gap (15) surrounded by the mold (16), A method for producing a concrete block for decorative building material, in which the mortar (14a) for hardening is removed after being cured, and the hardened mortar (14) is cut or broken at the center of the hardened mortar (14). 6. A formwork on the surface of the concrete block (11).
(17) is arranged, a cosmetic mortar (14a) comprising a mixture of cement, a rubber chip, a quick-setting admixture, a powder additive and water in the mold (17).
After the cosmetic mortar (14a) is cured, the mold is removed, and the surface of the cured cosmetic mortar (14) is polished or a part of the cosmetic mortar cured (14) is cut off. Manufacturing method of concrete blocks for building materials. 7. The method for producing a concrete block for a decorative building material according to claim 5, wherein the decorative mortar further comprises fine aggregate. 8. The method for producing a concrete block for a decorative building material according to claim 5, wherein the decorative mortar (14a) further contains either an AE agent or a foaming agent.