JP3565523B2 - Method for producing concrete decorative board - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method for manufacturing a concrete product relating to a landscape, for example, a decorative veneer made of natural stones or porcelain fragments exposed on the surface of a retaining wall or a pavement plate of a sidewalk in an uneven state.
[0002]
[Prior art]
Since the surface of a concrete product is a white flat surface, some products used for slopes, sidewalks and the like have their surfaces treated to improve the scenery. For example, in the case of a concrete block for legal fastening, a decorative plate having natural stone or shards of ceramics or the like on its surface to give a landscape close to nature can be mentioned.
[0003]
Such a decorative panel made of concrete is conventionally manufactured by a method as shown in FIG. That is, in FIG. 3 (a), reference numeral 1 denotes a mold, and stones 2, 2 of various sizes are sparsely spread on the bottom 1A of the mold 1, and the stones 2, 2 are not buried from above. The temporary fixing material 3 such as wax, agar, etc., is poured up to the height of, and each stone 2 is temporarily fixed at a desired position.
[0004]
Next, the concrete 4 is poured onto the stones 2 and 2 temporarily fixed by the temporary fixing material 3, compacted by vibration, and cured. After that, the cured body is removed from the mold 1 and the temporary fixing material 3 is removed by heating and melting, as shown in FIG. A decorative veneer 6 made of concrete on which the stone 2 protruding from 5A is disposed is obtained.
[0005]
[Problems to be solved by the invention]
However, in the conventional manufacturing method as described above, when the stone 2 is laid on the bottom 1A of the mold 1, the decorative surface (front side) 2A exposed on the surface of the finished decorative plate 6 is turned downward. 2 will be provided. In addition, the arrangement of the stone materials 2 must be set so that the top and bottom and the left and right sides of the decorative board 6 as a finished product are reversed, so that it is difficult for the manufacturer to construct a design as expected.
[0006]
Further, the front side 2A of each stone 2 is fixed to the concrete hardened body 5 in a state of being in contact with the plane of the bottom 1A of the formwork 1 as shown in FIG. As shown in FIG. 4, the front side 2A of each of the stones 2, 2 disposed on the surface protrudes from the surface 5A of the hardened concrete body 5 at the same height H, resulting in an artificial appearance. .
[0007]
Further, when the stone 2 is temporarily fixed with the temporary fixing material 3 such as wax or agar, the temporary fixing material 3 adheres to the surface of the molded decorative panel 6 after molding, making it difficult to peel off. At the same time, there are various problems that the surface 5A of the hardened concrete body 5 is formed into a smooth surface by the contact with the temporary fixing material 3, and is felt as artificial.
[0008]
[Means for Solving the Problems]
The present invention has been made in order to solve the conventional problems as described above, and it is an object of the present invention to provide an apparatus that can easily construct a design as planned at the stage of preparation, such as arrangement of stone materials and exposure height. The gist of this is that concrete is cast on the bottom of the formwork to form a concrete layer, and at the same time, mortar is cast on the concrete layer to form a mortar layer. After forming and placing stone materials such as natural stones, artificial stones, or ceramic fragments on the mortar layer, sand is charged to form a sand layer, and the sand is pressed from above through the sand layer. Molding, and removing the sand after demolding.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the present invention will be described in detail with reference to the embodiment shown in FIGS. 1 and 2. In the drawings, reference numeral 11 denotes a box-shaped form having an open upper side, and a concrete 12 is cast on a bottom 11A thereof. The concrete layer 12A is formed. In this case, low slump concrete can be used in place of ordinary concrete. At this time, since the breathing phenomenon is suppressed, press molding described later becomes easy.
[0010]
Next, a mortar 13 is cast on the concrete layer 12A to form a mortar layer 13A. The mortar layer 13A is for fixing by embedding a part of a stone 14 described later. The fluidity of the mortar 13 and the amount of casting are changed according to the type of the stone material 14 to be used. For example, a thin mortar layer 13A is used when a thin piece of ceramics or the like is used as a stone, and a mortar layer 13A corresponding to the embedding amount is secured when a thick stone such as natural stone is used. Good.
[0011]
Next, on the mortar layer 13A, a stone material 14 such as a natural stone, an artificial stone, or a piece of ceramics is appropriately arranged. At this time, since the upper surface of the stone 14 is the decorative surface (front side) 14A of the finished product, the maker can arrange the stone 14 while looking at the decorative side 14A and design as desired. At the same time, the embedding depth of the back side 14B of the stone material 14 into the mortar layer 13A is individually adjusted so that the arrangement of the stone materials 14 of the finished product becomes more natural. For example, in the case of a stone material that is particularly protruded, the stone material is simply placed on the mortar layer 13A as it is, and in the case of a stone material that is to be fixed at a somewhat low height, the stone material is buried slightly deeper in the mortar layer 13A. To do.
[0012]
When the arrangement of the stones 14 is completed and the design is determined, the dry sand 15 is introduced from above the stones 14 to form a sand layer 15A. Then, after leveling the upper surface of the sand layer 15A so as to be a horizontal plane, the pressing plate 16 is placed on the sand layer 15A, and the entire plane of the sand layer 15A is uniformly pressed from above.
[0013]
As described above, by pressing from above through the sand layer 15A, this pressing force is transmitted to the sand 15 and transmitted from the sand 15 to each stone 14, so that each stone 14 has the unevenness. A constant pressure will be applied regardless of the pressure. Therefore, each stone 14 is maintained in the set plane arrangement and the set exposure height, and the back side 14B is buried and fixed in the mortar layer 13A.
[0014]
Then, after maintaining the pressurization for several seconds, the pressing force is quickly released, and this is naturally cured all day and night. After curing, the mold is taken out of the mold 11 and the upper sand 15 is removed. In this case, since the sand 15 is dry, it can be easily removed, and as shown in FIG. 2 (b), a concrete finished makeup made of a concrete layer 12A, a mortar layer 13A, and a stone material 14. A plate 17 is obtained.
[0015]
In the decorative board 17 manufactured by the above method, since the sand 13 is removed, as shown in FIG. 2, a rough fine uneven surface 13B is formed on the upper surface of the mortar layer 13A. It gives an impression. In addition, the projecting heights h ₁ and h _{2 of the} stone materials 14 from the upper surface of the mortar layer 13A are also non-uniform, and maintain the expected exposure height.
[0016]
【The invention's effect】
As described above, the method for manufacturing a decorative veneer according to the present invention comprises the steps of: casting concrete on the bottom of a form to form a concrete layer; and casting mortar on the concrete layer. To form a layer of mortar, and place stones such as natural stones, artificial stones, or pieces of ceramics on the mortar layer, and then put sand in to form a layer of sand. When pressed from above through the mold, the sand is removed after demolding, so that the manufacturer can easily and surely realize the design as envisioned. The natural rugged surface is also formed on the mortar layer exposed on the surface of the concrete decorative panel, which has various effects such that a more naturally harmonious landscape can be obtained.
[Brief description of the drawings]
FIG. 1 is an explanatory sectional view of a manufacturing method according to the present invention.
FIG. 2 is an enlarged explanatory view of a surface portion of a decorative veneer made of concrete.
FIG. 3 is an explanatory sectional view showing a conventional manufacturing method.
FIG. 4 is an enlarged explanatory view of a surface portion of a concrete decorative board manufactured by a conventional method.
[Explanation of symbols]
11 Formwork 11A Bottom 12 Concrete 12A Concrete layer 13 Mortar 13A Mortar layer 14 Stone material 14A Front side 14B Back side 15 Sand 15A Sand layer 16 Pressed board 17 Concrete decorative board

Claims (3)

While concrete is cast on the bottom of the formwork to form a concrete layer, mortar is cast on the concrete layer to form a mortar layer, and natural stone is placed on the mortar layer. After placing stones such as stones or artificial stones or shards of ceramics, sand is charged to form a layer of sand, and the sand is formed by pressing from above through the sand layer. A method for producing a decorative veneer, comprising removing odor. 2. The method for manufacturing a concrete decorative board according to claim 1, wherein the embedding depth of the stone material arranged on the mortar layer in the mortar layer is individually adjusted. The method for producing a concrete decorative board according to claim 1 or 2, wherein the concrete layer is formed of low slump concrete.

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