JPH03189103A - Preparation of textured concrete product - Google Patents

Abstract

PURPOSE:To make it possible to express a texture with high accuracy by drawing a word, a figure or a texture on the inner face of a concrete form by using a non-curable material and washing an aggregate with water after a concrete block is molded. CONSTITUTION:The inner face of a bottom plate 1a of a concrete form 1 is coated with a liq. of a non-curable material so as to draw a required figure and a layer 2 of the non-curable material is formed by solidifying it by heating with steam and then, a concrete 3 is placed in the concrete form 1. Then, a specified figure is drawn on the upper face of the concrete 3 with a layer 2a of an non-curable material powder. Then, it is cured at ambient temp. and then cured by heating and furthermore cured at ambient amp. Then it is taken out of the concrete form and the upper and lower faces are washed with water to complete a concrete block 4 with an aggregate-exposed figure 5 corresponding to the figures drawn with the layer 2 of the non curable material 2 and the layer 2a of the non-curable powder. In some cases, curing at ambient temp. before curing with steam is not performed.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a method for producing a patterned concrete product for the purpose of providing characters, figures, or patterns on the surface of the concrete product.

(Prior art) Conventionally, in order to expose cobblestones, etc. on the surface of a concrete structure, a part of the cobblestones, etc. is embedded in a base of cement mortar, or a part of the cobblestones, etc. is buried on the surface of a concrete structure composed of cobblestones, etc. as aggregate. A curing retardant was mixed in, and after the other parts had hardened, the mortar in the unhardened parts was washed away with water.

(Problems to be Solved by the Invention) All of the above conventional methods not only require surface finishing of the concrete structure, but also require a great deal of labor and time, making it difficult to mass-produce patterned concrete blocks. .

Furthermore, even if hardening retardants are used, when producing concrete blocks, they can only be used to process the top surface without formwork, and cannot be applied to areas hidden behind the formwork. However, if the concrete is removed from the mold after it has hardened, there is a problem that the effect of the hardening retardant may be lost or significantly reduced, making it impossible to achieve the intended purpose.

Furthermore, it has been impossible to add letters, figures or patterns to centrifugally formed products or other concrete products that are cured in a mold by washing them out.

(Means for Solving the Problems) However, in this invention, letters, figures, or patterns are drawn on the inner surface of the formwork using a non-hardened material, and after the material has hardened, concrete is poured. After the concrete has cured, it can be removed from the mold and washed with water, making it possible to express letters, figures, and patterns by washing it out, thus solving the problems of the conventional method. .

That is, in this invention, characters, figures, or patterns are drawn on the inner surface of the form using a non-hardened material, and after the non-hardened material has hardened, concrete is poured into the form, and after the concrete has hardened, the mold is removed and the outer wall of the form is removed. This method of manufacturing patterned concrete products is characterized by washing with water to remove uncured concrete.

Further, the non-hardening material is a mixture of an alkali swelling material and a small amount of super absorbent polymer.

Next, the alkali swelling material is polyester resin, polyvinyl alcohol, or polyvinyl acetal. Furthermore, in order to draw characters, figures, or patterns on the inner surface of the formwork with a non-hardening material, it is necessary to apply a liquid non-hardening material.
This method is characterized by spraying or printing, or forming a plate with a non-hardened material layer in advance into a predetermined pattern, and temporarily attaching the plate.

(Function) According to the present invention, since letters, figures, and patterns are drawn on the inner surface of the formwork using a non-hardened material, the concrete that comes into contact with the part remains in an unhardened state for a long time.

Therefore, after the concrete has been cured and removed from the mold, if the uncured concrete is removed by washing with water, the aggregate will be exposed corresponding to the letters, figures, and patterns drawn on the inner surface of the form, and the letters, figures, and patterns drawn on the inner surface of the form will be exposed. express.

(Example 1) The invention will now be described with reference to FIGS. 1 and 2.

A non-hardened material liquid is applied to the inner surface of the bottom plate 1a of the formwork 1 in a desired shape, and heated to 40°C to 50°C with steam to solidify it to form a non-hardened material layer 2, and then the formwork 1 Place concrete 3 inside. Next, a predetermined figure is drawn on the upper surface of the concrete 3 using the non-hardened material powder layer 2a. Next, after curing at room temperature, heat curing at 70°C for 3 hours, remove the mold after curing at room temperature for 1 hour, and wash the upper and lower surfaces with water.
A concrete block 4 having an exposed aggregate pattern 5 corresponding to the pattern drawn with the unhardened powder layer 2a is completed. 6 in the figure is a reinforcing bar.

In the above, room temperature curing before steam curing may not be performed.

(Example 2) In the example shown in FIG. 3, pattern plates 7 with non-hardened material 2b are temporarily attached to the inner surfaces of the left and right side walls of the formwork 1, and concrete 3 is poured. Concrete blocks are obtained through similar operations. In this embodiment, since the pattern plate 7 is manufactured separately, there is no need to heat and harden the non-hardened material on the formwork 1. Further, since it is not necessary to provide a non-hardened material layer directly on the formwork 1, there is no need to consider the relationship with the non-hardened material layer when applying a release agent. Further, when making the pattern board 7, a highly accurate pattern can be expressed by printing the pattern on a base plate (for example, an iron plate), or printing it solidly and punching it into a predetermined shape.

(Example 3) Next, FIGS. 4 to 6 will be explained.

A non-hardened material is applied to the inner surface of the cylindrical formwork 8 in parallel to the center line, a release agent is applied to areas other than the non-hardened material, and the temperature is increased to 40°C to 5°C.
The uncured material 9 is solidified by heating to 0°C. Next, reinforcing bar group 1
4, a predetermined amount of concrete 10 is poured into the formwork 8,
The concrete cylinder 11 is centrifugally formed in the usual manner.

After curing at room temperature for 2 hours, steam curing at 80° C. for 4 hours, and curing at room temperature for another 2 hours, the mold is demolded.

Next, if the outside of this concrete cylinder 11 is washed with water,
The concrete in contact with the unhardened material is washed away, and the aggregate 12 is exposed to form a pattern.

The embodiment shown in FIG. 6 shows a concrete cylinder 13 in which non-hardened material is arranged in stripes.

According to the embodiment, since centrifugal molding is performed, concrete cylinders and the like can be molded with extremely high precision. However, the outer wall surface of the product is smooth, and the contrast with the exposed aggregate portion makes the pattern even more appealing.

(Effects of the Invention) According to the present invention, characters, figures, or patterns are drawn on the inner surface of the formwork using a non-hardened material, and concrete blocks, etc. are formed by a conventional method, so that the precision is improved by washing away the aggregate with water. This has the effect of producing concrete products that express patterns. Further, according to the method of the present invention, it is possible to produce patterned concrete products through a mass production process.

[Brief explanation of drawings]

Figure 1 is a cross-sectional view during molding during the implementation process of this invention;
The figure is a plan view of the product, FIG. 3 is a cross-sectional view of another process during mold filling, FIG. 4 is a cross-sectional view of an example of centrifugal molding, and FIG. 5 is a partial front view of the product. FIG. 6 is a front view of another product. 1... Form frame 2... Unhardened material layer 3... Concrete 4... Concrete block 5... Exposed figure 7... Pattern board 8... Form frame 9
...Non-hardening material 10...Concrete 11.13...Concrete tube 12...Aggregate

Claims (1)

[Scope of Claims] 1 Characters, figures, or patterns are drawn on the inner surface of the formwork using a non-hardening material, and after the non-hardening material has hardened, concrete is poured into the formwork, and after the concrete has hardened, it is removed from the mold. Method 2 for manufacturing a patterned concrete product characterized by washing the outer wall with water to remove unhardened concrete.The unhardened material has a pattern characterized by mixing a small amount of super absorbent polymer with an alkali swelling material. Method for producing concrete products with patterns 3 Method for producing concrete products with patterns characterized in that the alkali swelling material is polyester resin, polyvinyl alcohol, or polyvinyl acetal 4 Method for producing concrete products with patterns using a non-curing material on the inner surface of the formwork In order to draw the pattern, a liquid non-hardening material is applied, sprayed or printed, or a plate on which a non-hardening material layer is previously provided is formed into a predetermined pattern, and this is temporarily attached. Manufacturing method for patterned concrete products