JPH072585A - Surface-decorated concrete product made of porous aggregate - Google Patents

Abstract

PURPOSE:To obtain a surface-decorated concrete product exceedingly harmonizing with natural environment, resistant to peeling and producible by a simplified production process with reduced labor. CONSTITUTION:This surface-decorated concrete product made of porous aggregate is produced by decorating the surface of an ultra-stiff consistency concrete having a slump of 0-1cm with a porous aggregate having diameter of 5-200mm such as lava. The porous aggregate such as lava is resistant to peeling from the surface and moss, etc., are easily grown on the surface according to use to develop an elegant atmosphere harmonized with natural environment. The concrete product is easily producible in a mass in high efficiency by a simple production process. It has remarkably low production cost and further improved work efficiency compared with conventional material.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete product, and more particularly to a porous aggregate surface decorative concrete product which is surface-coated with a porous aggregate such as lava.

[0002]

2. Description of the Related Art Conventionally, concrete products with surface makeup include those with tiles, stones, color mortar coating, uneven patterning with rubber formwork, painting, etc., as well as exposed aggregate. .

Further, as the aggregate that is projected, a set retarder is applied to the surface of the mold, or paper or cloth impregnated with the set retarder is adhered to the mold, and relatively soft concrete is poured into the form. The mold is removed from the next day after the casting, and the mortar part on the surface of the molded body whose curing is delayed is removed and the aggregate is exposed on the surface, clay that does not harden, a mixture of water-soluble glue and sand For example, a part of the aggregate is embedded, and the relatively soft concrete is poured onto the aggregate according to the method described above, and the concrete is hardened after the day after the casting, and then the mold is removed. There are those obtained by washing away a mixture of glue and sand to expose the aggregate, and those obtained by washing the mortar portion with water when the concrete molded body that has been immediately demolded is uncured.

Further, as a method of using a tool, after the concrete component is hardened, a chipping finishing method or a chisel finishing method for removing the mortar part of the surface with a chipping tool, and hitting the surface with various hammers to form a mortar part on the surface. There is a Visyan beat finishing method that removes some aggregates.

Further, a grinder finishing method of polishing the surface with a grinder, a polishing finishing method with a grindstone, and the like are also performed. In addition, a blasting finish method in which iron particles and hard sand are wiped onto the surface of the concrete compact and the mortar part of the surface and a part of the aggregate surface are shaved, and the mortar part of the surface of the concrete compact is peeled off by evacuation. Some of the materials are exposed.

Further, a product in which gravel is adhered to the surface with hard concrete is also disclosed (Japanese Patent Publication No. 60-820).
No. 2).

[0007]

However, in the wash-out finishing method using the concrete hardening retarder, it is necessary to consider the fact that the concrete components harden and not lose the timing of washing out the concrete components on the surface. The shallow washout depth is about 5 mm. Further, it is difficult for the retarding agent to uniformly act on the surface, and it is difficult to uniformly wash and finish the product. As a result, uneven washout is likely to occur and a uniform product cannot be obtained.

[0008] Further, in the case of a product with a wash-out finish using clay or a water-soluble paste, the labor of embedding aggregate before placing concrete and the wash-out work after demolding are easier than the method using a concrete hardening retarder. Is.

Furthermore, the washing method after immediate demolding is difficult to completely remove the paste to be washed out, the aggregate is easily soiled, the product is easily broken because it is washed out before the concrete hardens, and the strength of the washing water flow is adjusted. It's difficult to do.

Further, in the method of chipping or beating which is finished with a tool after the concrete is hardened, there are many breaks such as chipping of corners, loosening of aggregates is apt to occur, and the finishing depth is shallow and laborious. Polishing with a grinder or grindstone gives a smooth finish and a beautiful cross-section of the aggregate, but the taste of the aggregate itself cannot be obtained, and with the method of polishing the surface, internal bubble marks appear and repair is performed. May be required.

Further, the blast finishing method and the vacuum mortar removal finishing method are not suitable for exposing a large aggregate having a shallow finishing depth, and the washing method with hydrochloric acid
In addition to the dangerous work, it is also necessary to consider environmental pollution.

Further, in the above-mentioned methods, except for the method of washing immediately after demolding, immediately after pouring concrete with a relatively large slump, demolding is performed on the day after the pouring day and the respective work is performed. Since it is carried out, the productivity is poor, and there is a drawback that wastes such as washing water, washing residue, chipping residue, and shavings are generated by any of the methods.

Further, the one disclosed in Japanese Examined Patent Publication No. 60-8202 is intended for gravel, and its surface is gray, which is as dry as the background of concrete, and it is essential because hard concrete is used. When water is squeezed under pressure, moisture oozes to stain the decorative surface, and various requirements are required to improve the adhesion between concrete and gravel. Furthermore, since the slump is about 2.5, aggregate is required. Has the drawback of settling in the concrete.

As described above, products in which natural stones are projected on the surface by various methods have been disclosed.
In both cases, the combination of natural stone and concrete containing a large amount of water causes poor adhesion between natural stone and concrete,
It was easily peeled off even after execution, and all the steps were complicated and labor-intensive, resulting in high costs and defects in manufacturing and products.

It is an object of the present invention to provide a surface decorative concrete product which is in maximum harmony with the natural environment, does not come off, and is capable of simplifying the process and reducing labor.

[0016]

Therefore, the present inventors have
As a result of intensive research to solve the above-mentioned object, a porous decorative material that solves the above-mentioned problems was developed by selecting a porous material such as lava that is most prone to moss and combining it with special concrete. did.

That is, the gist of the present invention is that the slump is 0 to
5cm to 200m in 1cm super hard concrete
It is a porous aggregate surface decorative concrete product obtained by applying a surface makeup with a porous aggregate such as m.

As the aggregate, a surface porous material such as lava having a diameter of 5 to 200 mm is used. The use of porous bodies such as lava is
Unlike other natural stones, lava is porous and has many irregularities, so it is excellent in bonding with concrete, does not easily peel off after bonding, and retains more water than ordinary natural stones. This is because moss and microorganisms grow and are more in harmony with the natural environment. This is a characteristic that natural surfaces such as gravel with a smooth surface do not have.

As the concrete, superhard mixed concrete having a slump of 0 to 1 cm is used. Super hard kneading concrete is a dry concrete that can be demolded and cured immediately after molding. It is a slump of about 5 cm or less, and it is necessary to use a powerful vibrator or pressure when compacting. Distinguished from hard concrete. If the slump exceeds 1 cm, excess water (including cement) is squeezed out by compaction and flows, so that the aggregate exposed on the surface is polluted. Especially, the surface porous aggregate such as lava is When concrete adheres to the surface of the aggregate, it is difficult to wash because it is fine and porous, and when a large aggregate is used, the aggregate precipitates in the concrete, which is not preferable.

[0020]

[Effect] According to the present invention, porous aggregates such as lava are less likely to be peeled off than conventional natural stones, and moss and the like are easily grown on the surface. We can provide harmonious concrete products. In addition, it is possible to mechanically produce exposed concrete blocks of porous aggregate such as lava, which is a natural product, the production process is simple, and efficient mass production is possible. The cost will be much lower and the work efficiency will be further improved.

Also in the production, concrete does not flow out, the finish is completed immediately after the mold is removed, and the surface of the exposed porous aggregate such as lava is not polluted or the taste is not spoiled and it is beautiful. Can be finished.

Further, since moss grows on the surface of porous aggregate such as lava, it is more suited to the environment than conventional concrete block products having natural stone such as gravel on the surface, and it is suitable for residential land development and stone walls. When used for landscaping work, it can lead to a beautiful personality that beautifully reproduces the natural texture and individuality, and it is also natural when used for civil engineering work such as embankment retention in rivers, riverbeds, tunnel entrances and exits in national parks and other parks. It is in harmony with the environment and can contribute to environmental protection.

[0023]

EXAMPLES Next, examples of the present invention will be described. Example 1 The face plate 3 is placed on the bottom of the mold 2 on the surface plate 6 shown in FIG.
Zero slump concrete 1 is laid on it with a thickness of 15 cm, porous lava 4 is laid on it as aggregate with a size of 50 to 100 mm, and vibration is applied to the mold 2 while pressing with the upper press 5. And compacted. Next, it was extruded from the mold 2 to take out a molded body, and a concrete product was obtained after curing. The concrete product obtained (second
The surface shown in the figure) was beautifully covered with aggregate 4 without being soiled with concrete.

Comparative Example 1 The same procedure as in Example 1 was carried out except that the concrete of slump 1.5 cm was used in place of the zero slump concrete in Example 1. However, the aggregate 4 settled in the concrete, and the surface was dirty, so that a satisfactory concrete product could not be obtained.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a state where concrete is laid on a formwork, aggregate is laid on the formwork, and the side plates of the formwork are removed.

FIG. 2 shows a compacted compact.

[Explanation of symbols]

 1 Superhard mixed concrete 2 Side plate template 3 Face plate 4 Aggregate 5 Upper press 6 Surface plate

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI technical display location B32B 33/00 7148-4F

Claims (1)

[Claims] 1. A porous aggregate surface decorative concrete product obtained by applying a surface makeup to a super aggregate concrete having a slump of 0 to 1 cm and a porous aggregate such as lava having a size of 5 to 200 mm.