JPH0632680A - Production of glazed precast concrete - Google Patents

Abstract

PURPOSE:To provide a method for producing a glazed precast concrete having a surface on which a pattern can readily be drawn with an excellent productivity. CONSTITUTION:The cement layer on the surface of a concrete base 1 is partly removed so as to expose aggregates 3. After applying a glaze to the surface where the aggregates are exposed, it is fired. The glaze 5 applied to the exposed aggregates 3 is subjected to yo-hen (to appear or change a color by firing and to appear a pattern thereby) due to iron component contained in the aggregates 3 thereby. Therefore, a difference in color between the glaze 5 applied to the cement layer and the glaze 5 applied to the aggregates 3 is produced and a complicated pattern is formed. Since a tasteful glazed surface can be shown thereby, the designability is improved. In addition thereto, the number of the manufacturing operations is reduced and therefore, the productivity is also improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a glazed concrete product having a pattern on its surface.

[0002]

2. Description of the Related Art Conventionally, as a method for producing a glazed concrete product in which a pattern is expressed on the surface, a method of masking the surface of a concrete substrate and applying different types of glaze separately and firing, A method of pasting a transfer sheet with a pattern printed on the glazed surface and baking it again, or spraying another glaze onto a concrete base with the one glaze previously applied on the surface using a glaze machine equipped with a spray nozzle etc. There was a method of firing afterwards.

[0003]

However, in the method using masking, it takes time and effort to attach and remove the masking, and in addition, different types of glaze sometimes bleed at the boundary. The method using a transfer sheet or the like requires a lot of time for manufacturing because it is fired twice. With the method using a glaze machine, it was difficult to control the spray amount, and the productivity was not good.

An object of the present invention is to provide a method for producing a glazed concrete product which is easy to express a pattern on the surface and has high productivity.

[0005]

According to the method for producing a glazed concrete product of the present invention, the cement layer on the surface of the concrete substrate is partially removed to expose the aggregate. A glaze is applied to the surface where the aggregate is partially exposed, and the aggregate is baked.

[0006]

According to the method for producing a glazed concrete product of the present invention, the cement layer on the surface of the concrete substrate is partially removed to expose the aggregate, and the surface where the aggregate is partially exposed is given a glaze and fired. At this time, the glaze applied on the exposed aggregate is kilned by the iron contained in the aggregate. Therefore, a color change occurs between the glaze applied on the cement layer and the glaze applied on the aggregate, and a complicated pattern is formed.

[0007]

EXAMPLE A method for producing a glazed concrete product according to an example of the present invention will be described with reference to FIGS. First, as shown in FIG. 1A, a mold 7 that is a box body having an upper opening is prepared, and a block 8 having a corrugated upper surface is provided on the bottom of the mold 7. In this state, apply concrete 9 to the mold 7 while applying vibration with a vibrator (not shown).
Pour evenly into. After being naturally trained for 24 hours, demolded 1
By leaving it for a week, a concrete substrate 1 having a corrugated surface 2 as shown in FIG. 1B is obtained.

As shown in Table 1, concrete 9 was prepared by mixing cement (containing mixed material) and shale as aggregate in the weight percentages shown in the lower column of the table, and adding water in the same weight. It is a kneaded one.

[0009]

[Table 1]

Then, using a cutting machine 10 comprising a conveyor 12 having a plurality of rollers 11 for moving the concrete substrate 1 in the direction of arrow X and a rotary wire brush 13, a wave front of the surface 2 of the concrete substrate 1 is used. Scrap off the cement layer in the area. As a result, the surface 4 where the aggregate 3 is partially exposed is formed as shown in FIG. Then 3 degrees Celsius
After drying at 00 degrees for 5 hours, the surface 4 is coated with glaze 5 and baked at 850 degrees Celsius for 1 hour. After further immersing in water for 30 minutes, the concrete concrete substrate 6 is obtained by leaving it in an atmosphere of 60 degrees Celsius and 98% relative humidity for 3 days.

The glaze 5 is a mixture of the materials shown in the right column of Table 2 in the weight ratio shown in the left column of the table.

[0012]

[Table 2]

As described above, when the glaze 5 is applied to the surface 4 where the aggregate 3 is partially exposed and fired, the glaze 5 applied on the exposed aggregate 3 is kiln-altered by the iron content contained in the aggregate 3. .
Therefore, a change in color occurs between the glaze 5 applied on the cement layer and the glaze 5 applied on the aggregate 3, and a complicated striped pattern is formed. As a result, a glazing surface with a taste can be expressed, which improves the design. Moreover, since the number of manufacturing steps is reduced, productivity is also improved.

When the aggregate 3 is partially exposed, the surface of the concrete substrate 1 may be made flat and the rotary wire brush 13 may be slid vertically.

[0015]

According to the method for producing a glazed concrete product of the present invention, the cement layer on the surface of the concrete substrate is partially removed to expose the aggregate, and the glaze is applied to the partially exposed surface of the aggregate. When fired, the glaze applied on the exposed aggregate is kiln-altered by the iron contained in the aggregate. Therefore, the color changes between the glaze applied on the cement layer and the glaze applied on the aggregate, and a complicated pattern is formed. As a result, a glazing surface with a taste can be expressed, which improves the design. Moreover, since the number of manufacturing steps is reduced, productivity is also improved.

[Brief description of drawings]

FIG. 1 is an explanatory view of a method for manufacturing a glazed concrete product according to an embodiment of the present invention.

FIG. 2 is a sectional view of a glazed concrete product.

[Explanation of symbols]

 1 Concrete base material 3 Aggregate 5 Glaze

Claims (1)

[Claims] 1. A glazed concrete product comprising: a step of partially removing a cement layer on the surface of a concrete substrate to expose an aggregate; and a step of applying a glaze to the surface where the aggregate is partially exposed and firing. Manufacturing method.