JP4381695B2 - Manufacturing method of colored cement products - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for producing cement products used for building materials such as exterior construction materials, in particular, colored cement products .
[0002]
[Prior art]
Some conventional cement products have been kneaded and colored with one or more pigments, and others have been colored. In addition, a cosmetic building material is known in which an organic material is kneaded and the surface is baked with a gas burner adjusted for heating to create a texture with burnt eyes and shades (see, for example, Patent Document 1).
[0003]
[Patent Document 1]
JP 2002-240738 A
[Problems to be solved by the invention]
By the way, in the case where the pigment is simply kneaded or colored, the color tone and the color unevenness are monotonous and the color fading is a problem. For those that burn burnt organic material on the surface, it is necessary to coat and fix the visually transparent material to protect the burnt organic material on the surface, increasing the number of manufacturing steps, and the price Was soaring.
[0005]
Accordingly, an object of the present invention is to provide an inexpensive colored cement product that has cosmetic properties due to a changed color scheme but does not cause color fading in the color scheme .
[0006]
[Means for Solving the Problems]
In order to achieve this object, the present invention is a cement product obtained by kneading, molding, and solidifying and drying a pigment mainly composed of sand, gravel, cement, water, and iron oxide pigment, at least one surface of the cement product without color unevenness based on the change in color, the flame emanating propane gas using compressed oxygen appropriately mixed and the gas burner by Rukoto with gas burner as fuel in thermal power adjusting oxidizing flame And reducing flame , adjusting the distance between one side of the cement product to be flame-treated and the burner and firing, to change the color of the iron oxide pigment on one side of the cement product to be colored unevenly It is characterized by generating color unevenness based on it.
According to the present invention, a cement product is molded using sand, gravel, cement, water and pigment as raw materials, and at least one surface of the cement product is colored by baking to be baked. Products can be provided.
[0007]
Further, according to the present invention, the pigment is made of iron oxide as a main raw material, and a flame emitted from the gas burner using a propane gas as a fuel, which is appropriately mixed with compressed oxygen, is used for oxidizing and reducing the flame. Since it is baked by adjusting the distance between the one surface to be subjected to the color unevenness and the burner while producing a color unevenness based on the iron oxide pigment, it has cosmetic properties with a varied color scheme A colored cement product can be provided.
[0008]
In addition, according to the present invention, since the colored cement product has color unevenness based on the iron oxide pigment , various colors and shades can be obtained by firing methods such as red, black, yellow, and brown.
[0009]
The invention according to claim 3 is the method for producing a colored cement product according to claim 1 or 2 , wherein the at least one surface is coated with an aqueous iron chloride solution and fired. Color development is obtained by the reaction.
[0010]
Furthermore, the invention of claim 4 is the method for producing a colored cement product according to any one of claims 1 to 3 , wherein the iron chloride aqueous solution is unevenly coated and fired. It is possible to obtain products with uneven color and uneven color due to density unevenness.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
The invention will be described below with reference to the drawings showing embodiments of the invention.
[0012]
FIG. 1 is an example of the colored cement product of the present invention, and FIG. 2 is a diagram showing an example of the manufacturing method of the present invention.
[0013]
In the figure, reference numeral 10 denotes a colored cement product, which has, for example, a rectangular parallelepiped shape. A groove 11 having a semicircular cross section is formed on one surface in the longitudinal direction, and two holes 12 penetrating the opposite surface are formed at the bottom of the groove 11. Individually formed. The cross-sectional shape and size of the groove 11 are also appropriately selected, and a reinforcing bar is passed through the groove 11 or cement and the like are stacked.
[0014]
A cement product 13 which is a semi-finished product of the colored cement product 10 is made of sand, gravel, cement, water, and pigment as raw materials, changing the mixing ratio according to the application, or molded into a flat plate or the above block shape. . As an example of the mixing ratio, the weight ratio is sand: 60%, gravel: 20%, cement: 20%, and the cement ratio is water: 30%, pigment: 1-2%.
[0015]
Although pigments are various, here antique system, yellow, orange, red, brown, gray - system tint to be using the iron oxide (red iron oxide) compatible, is kneaded mixed only with the above-mentioned raw materials. Kneading does not require a spraying process and can be performed in a short time, and is used here.
[0016]
The molded product may be baked on the entire surface, but the baking of the surface that becomes invisible at the time of use is omitted, and at least one surface required here is baked and colored. The colored cement product obtained in this manner develops a color of the pigment by baking and is baked, so that it can be made vivid and difficult to fade and can be made inexpensive.
[0017]
In addition, it is fired by adjusting the flame of a gas burner that changes the distance, temperature, time, etc. of the flame to produce uneven coloring, and a cosmetic colored cement product having a changed color scheme is obtained. Pigments containing iron oxide as the main raw material can be obtained in various colors and shades such as red, black, yellow, and brown depending on the firing method such as temperature, atmosphere, flame (for example, oxidation flame, reduction flame) and presence of alkali. .
[0018]
An iron chloride aqueous solution is applied to and fired on at least one surface of the cement product 13 which is a semi-finished product, and a color is obtained by the reaction of iron and chlorine. We have developed a colored cement product with uneven color that has changed from uneven density.
[0019]
Next, a method for producing the colored cement product will be described.
[0020]
Naturally, it can be done manually, but here an automated example is shown in FIG. The conveyor belt 20 is lined up, a pedestal 50 is placed thereon, and the cement product 13 is placed away from the conveyor belt 20 to flow. A gas burner 30 and a sprayer (air gun) 40 are provided on both sides or above the cement product 13 as necessary. Are arranged. For example, the gas burner 30 and the sprayer 40 are not used when the upper surface of the cement product 13 does not appear on the surface during construction. The gas burner 30 and the sprayer 40 are moved away from at least the cement product 13 to be affected by the baking range, temperature, oxidation flame, reduction flame, and the speed of moving along the surface and the speed of the conveyor belt 20 are changed. Similarly, color unevenness is caused by the influence.
[0021]
As the gas, industrial propane gas (Sharp gas) is used. That is, as the gas, household propane gas, which is cheaper and easier to handle than acetylene gas , is used, and compressed oxygen is appropriately mixed and used. The heating power can be adjusted by the mixing ratio, and the width and color of the unevenness of baking change.
[0022]
On the other hand, what is sprayed by the sprayer 40 is an iron chloride aqueous solution here. By changing the spraying distance of the sprayer 40, changing the time of stopping the spraying, and changing the concentration of the aqueous iron chloride solution (dilution ratio of 5 times, 10 times, and 15 times), the color tone can be obtained by baking. It is done.
[Brief description of the drawings]
FIG. 1 is a perspective view of a colored cement product.
FIG. 2 is a schematic configuration diagram showing a production line for a colored cement product.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Colored cement product 13 ... Cement product 20 ... Conveyor belt 30 ... Gas burner 40 ... Sprayer

Claims (4)

A cement product obtained by kneading, molding, and solidifying and drying a pigment mainly composed of sand, gravel, cement, water, and iron oxide pigment, and having no color unevenness based on a change in the color of the iron oxide pigment At least one side of
It is a flame emanating propane gas using compressed oxygen appropriately mixed and the gas burner by Rukoto with gas burner as fuel the by thermal adjustment oxidizing flame and reducing flame, and 1 of the cement product to be flame treated Bake by adjusting the distance between the surface and the burner ,
A method for producing a colored cement product, wherein color unevenness based on a change in hue of an iron oxide pigment is generated on one surface of the cement product to which color irregularity is to be applied. 2. The color cement product according to claim 1 , wherein the adjustment of the distance between the one surface to be subjected to the color unevenness and the burner is performed by running the cement product on a conveyor belt and fixing the burner. Production method. 3. A method for producing a colored cement product according to claim 1 , wherein an iron chloride aqueous solution is applied to the at least one surface and fired. The method for producing a colored cement product according to any one of claims 1 to 3 , wherein the iron chloride aqueous solution is unevenly coated and fired.

Images