JP2000127134A - Imitation stone and its manufacture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a low-cost imitation stone more similar to a natural stone capable of easily manufacturing a base stone even by introducing the natural tone of a size exceeding 100 mm without necessity of a kneader having a large size and a high performance. SOLUTION: A process of the steps of casting a specified amount of kneaded concrete for the imitation stone in a form and introducing a natural stone in the cast concrete is repeated until the form is fully filled with the concrete and the natural stone, curing it, then releasing the cured concrete from the form, thereby obtain a concrete lump to become a base stone. The obtained base stone is cut in a flat plate state, obliquely, into round slices or the like to obtain the imitation stone 1 of a desired surface displaying a natural stone sectional surface on the surface.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pseudo-stone having relatively large natural stones mixed therein and more similar to natural stones, and a method for producing the same.

[0002]

2. Description of the Related Art Stone materials used as decorative materials for civil engineering and architecture are difficult to obtain from the viewpoint of resource depletion and natural environment conservation, and are expensive. Therefore, there is a need for a technique for effectively using the produced stone materials without waste, and there is a need to develop a method for producing a pseudo stone that is more similar to natural stone using these stone materials.

Conventionally, as a method of producing a pseudo-stone, a pseudo-stone having a desired shape such as a flat plate is directly formed from a raw material for pseudo-stone by a press machine or the like, and the surface is treated to produce the pseudo-stone. There is known a method of producing a massive block stone, cutting it into a desired shape, and subjecting it to a surface treatment. Further, from the viewpoint of raw materials, there are a raw material in which natural stone is not used at all and a raw material in which natural stone blocks and swarf pieces in a quarry are mixed with a cement material. As the artificial stone, a mixture of natural stones, and the higher the proportion of the artificial stones in the surface area, the more natural stones are preferable. In that respect, in a method of producing a pseudo stone by mixing natural stone with concrete raw material, for example, when a thin flat plate such as a wall plate is directly formed from the raw material, a large natural stone cannot be mixed with the raw material. In order to obtain the base stone, a method of manufacturing a large base stone into which a large stone block or a piece can be mixed, and cutting it into a thin plate is suitable.

[0004]

When a base stone is manufactured, it is obtained by kneading a raw material of concrete and a natural stone at a time, putting the mixture into a mold, curing it, and removing it from the mold. The natural stone to be put in the fake stone is preferably larger as described above because the proportion of the cut area becomes higher,
In kneading the raw materials, the size of the natural stone is limited depending on the performance of the kneader. As natural stones grow larger, kneading machines need to have appropriate strength and kneading performance.
There is a problem that a large-scale high-performance kneader is required and equipment costs and running costs increase. For this reason, it has been difficult to mix natural stones having a maximum diameter of about 40 mm and mixing natural stones of 100 mm or more, for example, 300 mm at the same time.

The present invention has been made in view of the above circumstances, and does not require a large, high-performance kneader.
A base stone can be easily manufactured even if a natural stone having a size of more than 100 mm is input without being limited to a natural stone to be used as a cement raw material, and a larger natural stone appears on a cut surface and approximates to a natural stone. It is an object of the present invention to provide a method for producing pseudoliths that can be produced at low cost.

[0006]

The pseudo stone of the present invention for solving the above-mentioned problem is a pseudo stone obtained by cutting a base stone obtained by mixing natural stone in concrete and forming the cut stone, and a cut surface thereof. Contains at least a cut surface of natural stone having a maximum diameter of 100 mm or more. A plurality of cut faces of natural stone appear on the cut face of the base stone serving as the surface of the artificial stone, and the ratio of the natural stone occupying the cut face of the entire artificial stone is preferably 50 to 60% or more, among which the maximum diameter is 10%.
By including a natural stone cut surface of 0 mm or more, a pseudo stone more similar to natural stone can be obtained.

[0007] The method of the present invention for producing pseudo stones comprises a concrete split casting step in which a specified amount of kneaded pseudo stone concrete is poured into a formwork, and a natural stone is poured into the poured concrete. The natural stone charging step to be buried in the mold is repeated until the mold is filled with the artificial stone for concrete and natural stone, and after hardening, a concrete block that becomes a base stone by demolding is obtained, and the obtained base stone is arbitrarily cut to obtain a desired shape. It is characterized by obtaining fake stones. When the natural stone to be introduced has a maximum diameter of 100 mm or more, the ratio of the natural stone to the cut area of the pseudo stone increases, and the stone becomes more natural stone. In addition, the cut surface of the pseudo stone obtained by cutting as desired is subjected to surface treatment such as vishan finishing, shot blasting, polishing, and hydrochloric acid treatment, so that the cut surface can appropriately have a texture similar to natural stone. Furthermore, a stronger pseudo stone can be obtained by vibrating the formwork as needed during the manufacturing process of the base stone or by compacting the concrete surface by pressing the concrete surface from above with a predetermined pressure.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an embodiment of a method for producing a pseudolith according to the present invention will be described in detail. The method of manufacturing a pseudo stone according to the present embodiment shows a case where a pseudo stone closer to a natural stone is manufactured by mixing natural stones of 100 mm or more into the pseudo stone, and includes the following steps. Pseudo-stone concrete such as cement, sand, stone powder, aggregate, water, etc., having a pre-designed composition is kneaded, and a specified amount is poured into a mold formed in a rectangular parallelepiped or the like (concrete split pouring step). The prescribed amount is desirably a thickness (depth) of a degree that natural stone exceeding 100 mm is immersed. Thereafter, an arbitrary amount of natural stone, including one having a size exceeding 100 mm, is put into the concrete in the formwork and pressed until it is sufficiently immersed in the concrete (a natural stone charging step). Further, the above process is repeated until the form is filled with artificial stone and natural stone. At this time, the compact is uniformly compacted by giving vibrations to the form (compacting step). After curing, the mold is removed from the mold to obtain a rectangular parallelepiped concrete block (base removal step). The obtained base stone is arbitrarily sliced to obtain flat stones, prisms, and other shapes of pseudo stones (cutting step). The thus obtained product is subjected to a surface treatment such as vishan finishing, shot blasting, polishing, and hydrochloric acid treatment as necessary (surface treatment step). Depending on the product, the cut surface may be used without performing the surface treatment.

[0009] In the above process, natural stone is pre-wetting, that is, stone powder adhering to the surface as well as wetting the surface in order to improve the adhesive force with the concrete and to secure the stable fluidity of the concrete. It is preferable that the soil and the like be washed off and then poured into the artificial stone concrete. In addition, the compaction step is not necessarily performed after the mold is filled with the artificial stone for concrete and natural stone, and while appropriately vibrating the mold during the above process,
Alternatively, compaction may be performed while applying pressure each time the above process is completed.

The artificial stone obtained as described above is schematically shown in FIG. The surface of the artificial stone 1 of the present invention has a maximum diameter of 10
A plurality of natural stone cut surfaces 2 of 0 mm or more appear in a mixed form with the concrete surface 3, but concrete adheres densely to the porous surface on the outer periphery of the natural stone, and it is difficult to distinguish the boundary between the natural stone cut surface 2 and the concrete surface 3. , As a whole, has the texture of natural stone. To get a more natural stone texture,
It is desirable that the natural stone cut surface appearing on the surface of the pseudo stone is in the range of 30 to 70% of the entire surface of the pseudo stone.

[0011]

EXAMPLES cast stone for concrete raw materials white portland cement 400 kg / ^{m 3} Sand 168 kg / ^{m 3} stone powder 168 kg / ^{m 3} Aggregate 826kg / ^{m 3} water 180 kg / ^{m 3} a maximum diameter natural stone material Ryukyu limestone 100~150mm Kuriishi

The concrete material for artificial stone is kneaded with a kneading machine and poured into a mold having an inner volume of 650 × 1000 × 1700 mm in a thickness of 50 mm, and then 70 natural stones are put into the concrete so as to be arranged at appropriate intervals. Pressed. Then, concrete was poured thereon to the same thickness as before, and the natural stone was similarly buried in the concrete. The same process was repeated five times until the mold was filled, and each time the mold was vibrated with a vibrator to compact it. After the concrete was solidified, it was removed from the mold to obtain a base stone.
The surface of the natural stone to be charged was previously cleaned and moistened. Since the above-mentioned kneader merely kneads the raw material for artificial stone, a usual small mixer can be used.

The obtained base stone was sliced at a thickness of 30 mm to obtain a plate-like pseudo stone. The obtained pseudo-stone has a plurality of cut surfaces of natural stone having a maximum diameter of 100 mm or more mixed between concrete, and the ratio of the natural stone surface to the entire surface of the pseudo-stone exceeds 50%. A material exhibiting a texture close to the above was obtained. When the surface was further treated by hydrochloric acid treatment or blasting, the boundary between the natural stone and the concrete surface was lost, and as a whole, a Ryukyu limestone-like pseudo stone similar to the surface condition of the natural stone was obtained.

[0014]

According to the method of the present invention, large natural stones can be mixed in concrete for artificial stones without using a kneading machine, so that it is not necessary to knead cement raw materials and large natural stones with a kneading machine, and it is inexpensive. With a simple facility, it is possible to produce a pseudo stone closer to natural stone.

[0015] Since a base stone can be easily manufactured even when a natural stone having a size exceeding 100 mm is introduced, a larger cut surface of the natural stone can be realized on the surface of the pseudo stone, which makes the stone more natural. Thus, pseudo stones very similar to natural stones can be obtained at low cost. Further, if the cut surface is surface-treated, the boundary between the natural stone and the concrete surface is lost, so that a pseudo stone can be obtained which is more similar to the surface state of the natural stone as a whole.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of a pseudo stone according to an embodiment of the present invention.

[Explanation of symbols]

 1 fake stone 2 cut surface of natural stone 3 concrete surface

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) C04B 14:04) (72) Inventor Kenji Ishu 1839-1 Kunbu, Gushikawa-shi, Okinawa Daiwa Concrete Industry Co., Ltd. Company F term (reference) 4G012 PA04 PE01 PE02 4G055 AA01 AC01 BB01 BB05 FA09

Claims (4)

[Claims] 1. A pseudo-stone obtained by cutting a base stone formed by mixing natural stone in concrete, wherein the cut surface includes a natural stone cut surface having a maximum diameter of at least 100 mm or more. Fake stone. 2. A concrete dividing and pouring step of pouring a specified amount of the kneaded artificial stone concrete into a formwork,
Repeating the step of putting a natural stone into the poured concrete and burying it in the concrete until the mold is filled with pseudo stone concrete and natural stone, and after hardening, removing the mold to obtain a concrete mass that will be a base stone, A method for producing a pseudo stone, characterized in that a pseudo stone having a desired shape is obtained by arbitrarily cutting the obtained base stone. 3. The natural stone to be charged has a maximum diameter of 100 mm.
The method for producing a pseudolith according to claim 1, which is the above. 4. The method according to claim 1, wherein the cut surface of the pseudo stone obtained by cutting is subjected to surface treatment such as vishan finishing, shot blasting, polishing, and hydrochloric acid treatment.