JP2779459B2 - Method of manufacturing patterned concrete products - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a concrete product such as a side gutter having an uneven pattern on its surface, an L-shaped retaining wall, a block for a retaining wall, and the like.

[0002]

2. Description of the Related Art As a conventional method of manufacturing a concrete product of this type, a rubber mold, a resin mold, or the like having a pattern is laid on the inner bottom of a mold so that the pattern surface faces upward, and in this state, the mold is formed. There is known a method in which concrete is poured into the inside, and after the concrete hardens, it is released from the mold.

In this conventional method, however, it is necessary to prepare expensive patterned rubber molds, resin molds, etc., one for each mold, and the patterned rubber molds, resin molds, etc. are formed by steam. When subjected to forced curing, it is particularly susceptible to deterioration, and must be frequently replaced with new one, resulting in an increase in cost of concrete products.

[0004] In order to solve such a problem, for example, Japanese Patent Publication No. 3-27368 discloses a method in which concrete is poured into a formwork and elastic deformation does not occur before the concrete does not harden. In addition, there has been proposed a method in which a patterned rubber mold or the like is placed on the surface of concrete, and the upper surface thereof is rolled with a roller to transfer the pattern of the rubber mold or the like to the concrete surface.

[0005]

However, in this method, before concrete hardens, and after waiting for 4 to 8 hours until elastic deformation does not occur, a patterning operation using a rubber mold or the like is performed. Since this must be performed, productivity cannot be improved due to poor rotation efficiency of the formwork, and the waiting time varies depending on the season or the weather condition of the day. There is a problem that is troublesome.

The present invention has been made in view of such problems of the prior art, and has as its object to reduce the waiting time after placing concrete.
Immediately, a patterning operation for forming an uneven pattern on the surface can be performed, and the patterning operation can be easily performed irrespective of the season or the weather condition of the day. Rubber mold with pattern,
It is an object of the present invention to provide a method for manufacturing a patterned concrete product that can perform a patterning operation without using a resin mold or the like.

[0007]

A method of manufacturing a patterned concrete product according to the present invention has the following structure to achieve the above object. That is, concrete is poured into a formwork, and mortar or cement paste is sprayed on a surface of the concrete having appropriate softness with a spray gun such as a spray gun , and the spray pressure is applied.
An irregular pattern is formed on the surface of the concrete, cured, cured, and then released from the mold. Air pressure is applied to the surface of the cast concrete having appropriate softness by the above-mentioned sprayer or an appropriate method and means, and the applied pressure causes a depression on the surface of the concrete.
A method in which a convex pattern is formed, then cured, cured, and then released from the mold may be used.

[0008]

After Da設the concrete to [work for] type frame within, appropriate
Spray gun on soft concrete surface
The sprayer etc., spraying mortar or cement paste. Alternatively, the sprayer or an appropriate method,
By means, only air pressure is mainly applied to the surface of the concrete. By the blowing pressure or the applied air pressure, an uneven pattern is formed on the surface of the concrete.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention in a method for manufacturing a concrete product such as a gutter will be described below with reference to the drawings.

A mold 1 is formed in a box shape with a bottom by a bottom plate 2 and a side frame 3 which can be opened and closed, and concrete 4 is cast into the mold 1. Then, a vibrator is applied to the concrete 4 in this state, and the concrete 4 is compacted. As the concrete 4, in addition to ordinary concrete obtained by mixing water, sand and gravel in cement, mortar excluding gravel or lightweight cellular concrete may be cast (hereinafter, concrete is mortar, It refers to a wide concept including lightweight cellular concrete).

Thereafter, mortar or cement paste 6 is sprayed on the surface of the concrete 4 using a sprayer 5 such as a spray gun without taking a waiting time. The blasting pressure of the mortar or cement paste 6 forms an uneven pattern such as a wind ripple on the surface of the concrete 4 and also forms the coating 7 of the mortar or cement paste.

The mortar is a mixture of cement and water and sand, and the cement paste is a mixture of cement and water. Either one is selected and the mixing ratio of the materials is appropriately adjusted. By setting to, the film 7 having a desired surface state can be formed. Also,
If necessary, a colorant such as a pigment may be mixed with the mortar or cement paste 6 and used, so that a coating 7 of a desired color can be formed.

Further, in order to form an uneven pattern on the surface of the concrete 4 by the spray pressure as described above, the concrete 4 needs to be appropriately soft. For this reason, the slump value of the concrete 4 to be cast is set to about 6 to 20 cm, preferably about 12 cm. Further, the thickness of the coating 7 to be formed is 1 to
About 2 mm is appropriate.

After the formation of the uneven pattern and the coating 7, the concrete 4 is forcibly cured with steam or the like.
Or natural curing. Further, after the concrete product is hardened to a predetermined hardness by this curing, the side frame 3 of the mold 1 is opened and rotated outward to rotate the concrete product into the mold 1.
Remove from mold.

As described above, according to the manufacturing method of this embodiment, after the concrete 4 is poured into the mold 1, the concrete 4 is immediately sprayed by the spraying device 5 such as a spray gun without waiting time. A mortar or cement paste 6 is sprayed on the surface to form an uneven pattern on the surface of the concrete 4 by the spraying pressure, and the mortar or cement paste film 7 can be formed.

Therefore, it is not necessary to take a long waiting time after the concrete 4 is cast, and the patterning work can be easily performed without being influenced by the season or the weather condition of the day. Further, it is not necessary to use expensive patterned rubber molds and resin molds for forming the patterns.

The present invention is not limited to the configuration of the above-described embodiment. For example, in a state where concrete 4 is cast into the formwork 1, the surface of the concrete 4 is corrugated with a patterned roller or the like. And then spray mortar or cement paste 6,
The uneven pattern and the coating 7 may be formed.

Further, on the surface of the concrete 4 which has been cast,
Instead of spraying the mortar or the cement paste 6, the uneven pattern may be formed using air pressure. That is, only the air pressure is mainly applied to the surface of the concrete 4 by using a spraying device such as a spray gun, or by another method or means, and an uneven pattern is formed by the applied pressure. After curing, the mold may be released. However, in this embodiment, the concrete 4 to be poured is preferably a material having a large slump value, that is, a soft material, as compared with the above-described embodiment in which the mortar or the cement paste 6 is sprayed to form an uneven pattern. , Slump value 15c
It is preferable to select one of about m, but the present invention is not limited to this.

Further, the present invention is not limited to the gutter cover,
The present invention can be suitably applied to a method for manufacturing an L-shaped retaining wall, a block for retaining wall, and other concrete products.

[0020]

Since the present invention is constructed as described above, the surface of the concrete is made to have an irregular shape immediately without taking a waiting time after the concrete is poured.
It is possible to perform patterning work to form patterns, improve the efficiency of rotation of the formwork and improve productivity, and perform patterning work without being affected by the weather conditions of the season or the day. It can be easily performed, and the patterning work can be performed without using expensive rubber molds and resin molds with a pattern, and the product cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a sectional view showing one embodiment of a method for manufacturing a patterned concrete product according to the present invention.

[Explanation of symbols]

1 Formwork 4 Concrete 5 Sprayer such as spray gun 6 Mortar or cement paste

Claims (2)

(57) [Claims] 1. Concrete is poured into a formwork, and an appropriate
A mortar or cement paste is sprayed on a soft surface of the concrete with a sprayer such as a spray gun , and the spray pressure causes the concrete to be sprayed.
A method for producing a patterned concrete product, comprising forming an uneven pattern on a surface, curing the cured product, and releasing the product after curing. 2. Concrete is poured into a formwork, and an appropriate
Air pressure is applied to the surface of the concrete having softness, and the surface of the concrete is uneven by the applied pressure.
A method for producing a patterned concrete product, comprising: forming a pattern in a shape, curing after curing, and demolding after curing.