JPH10331394A - Natural stone tile and concrete panel for pc construction method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the cost and prevent the cracking when a natural stone tile is applied to a concrete panel for PC construction method without using a connecting locking member. SOLUTION: In a natural stone tile 1 for dressing the surface of a concrete panel used for PC construction method, the thickness of the natural stone tile 1 is set relatively thin, and at least one dovetail groove 2 is formed on the surface of the side contact with concrete. In the application of the natural stone tile 1 to a concrete panel, thus, the natural stone tile 1 can follow the thermal expansion force of concrete since it is thinly formed, and also it can be never peeled or cracked since the biting of concrete is enhanced by the dovetail groove 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a PC method applied to a building, and relates to a natural stone tile formed from natural stone such as granite or marble and a concrete panel to which the tile is attached. It is about.

[0002]

2. Description of the Related Art In general, a PC method is widely used for shortening a construction period of a building and simplifying construction. In this PC method, a plurality of relatively thick (thickness 2)
0mm or more) Concrete panels with stones attached
A locking member such as an anchor bolt is disposed on the back surface of each stone material to be attached, and integrated with concrete to form a concrete panel. Such a concrete panel is directly connected to a column, a beam, or the like made of a steel frame through an appropriate connecting means, and is used as an outer wall of a building.

[0003]

When natural stone is used in the PC method and used as an outer wall of a building, there are the following problems. . In addition to the cost of the anchor, the labor and time required for mounting the anchor increase. . Due to the difference in the coefficient of thermal expansion, the thermal expansion force of natural stone cannot follow the thermal expansion force of concrete, and cracks are formed on the surface of natural stone to significantly impair the appearance. In addition, it is necessary to apply a resin such as epoxy or silicon to the back surface of the stone material in order to absorb the thermal expansion force, which requires more time and effort.

[0004] Therefore, when a natural stone material is applied to a concrete panel of the PC method, there is a problem to be solved in reducing the cost and preventing the occurrence of cracks.

[0005]

SUMMARY OF THE INVENTION As a specific means for solving the problems of the prior art, the present invention relates to a natural stone tile for decorating a surface of a concrete panel used in a PC method, and A natural stone tile for a PC method characterized by having a relatively small thickness and one or more dovetail grooves formed on a surface in contact with concrete; and a PC method using the natural stone tile. A concrete panel is provided.

Further, in the present invention, the natural stone tile has a thickness of 5 to 20 mm, the width of the dovetail groove is 3 mm or more, and the depth is 1 mm or more.

[0007] The natural stone tile according to the present invention can be made to follow the thermal expansion force of concrete because it is formed relatively thin and has a groove on the surface that contacts concrete. The concrete groove is improved by the dovetail groove so that peeling and cracking do not occur.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the illustrated embodiments. In FIG. 1, a natural stone tile 1
Is made of a natural stone material such as granite or marble and has a predetermined size and is formed in a polygonal shape such as a relatively thin square shape. The back surface side, that is, the surface in contact with the concrete, has a predetermined size. Two dovetail grooves 2 having a predetermined width and a predetermined depth are formed.

In this embodiment, a square natural stone tile 1 is shown, but the polygonal shape is not limited to this rectangle, but also includes a triangle, square, pentagon, hexagon, octagon and the like. The length of one side of the polygonal shape of the natural stone tile 1 depends on the shape, and as a result of various experiments, is preferably 150 m.
m, but can be used from about 50 mm to about 500 mm, and its thickness is from 5 mm to 20 mm.

If the size of the natural stone tile 1 is too large or too thick, the difference in expansion and contraction due to the difference in the coefficient of thermal expansion between the natural stone tile 1 and the concrete is widened and cracks easily occur. . In addition, natural stone tile 1
Is too small, there is a problem in workability, so the above range is appropriate.

Further, the dovetail groove 2 formed on the back surface side of the natural stone tile 1 may be formed in at least one line depending on the size of the tile. The formation of the dovetail groove 2 is preferably 5 or less in consideration of the fact that the adhesiveness to concrete is not so much improved even if it is formed, and the workability in production is rather deteriorated.

The width of the dovetail groove 2 needs to be at least 3 mm, and the depth of the dovetail groove 2 needs to be at least 1 mm depending on the thickness of the tile. In short, the number, width, and depth of the dovetail grooves 2 are determined by the size and thickness of the natural stone tile 1 in consideration of the bonding property with concrete.

The shape of the dovetail groove 2 is shown in FIG.
As shown in (A) to (D), a so-called dovetail-shaped or wedge-shaped groove having a widened bottom, a groove formed diagonally, or a groove formed diagonally on one side. Or a groove formed in a U-shaped cross section, and these grooves can be formed in various shapes such as a straight line, a curved line, or an arc. In short, there is a groove 2
If the is formed, there is almost no problem in the bonding force with the concrete.

The back side of the natural stone tile 1 is entirely formed with a rough surface so that it can be easily conformed to concrete. Then, on the front side, depending on the place of use, it is selected whether to use it as it is with a rough surface or to use it with a mirror finish.

Using the natural stone tile 1 thus constructed, a concrete panel 3 for the PC method is formed as shown in FIG. In this case, similarly to the formation of a normal concrete panel, a plurality of natural stone tiles 1 are arranged and arranged in a predetermined formwork in a manufacturing plant,
A required amount of concrete is charged, and the concrete is hardened to be integrally formed.

In the natural stone tile 1 formed integrally, concrete enters into the dovetail groove 2 on the back side to improve the biting, and the back side is entirely formed as a rough surface. It has good familiarity and the bond between the natural stone tile and concrete becomes strong.

When the natural stone tiles 1 are arranged and arranged in the form during manufacturing with the form, a concave portion into which a part of the natural stone tile 1 is fitted is formed in the form. If
Even if vibrations are applied to the formwork in the compacting step, the expected arrangement of the natural stone tiles 1 can be performed without causing a shift phenomenon.

Further, as in the other embodiment shown in FIG. 4, the natural stone tile 1 can be integrally attached to a preformed concrete panel. In this case, for example, the surface of the concrete panel 3 is formed into a rough surface, a concrete layer 3a for bonding having a predetermined thickness is formed on the concrete panel, and the natural stone tile 1 is integrated through the concrete layer 3a. It is stuck on.

In any of the above cases, the natural stone tile 1 and concrete can be integrally formed without using a locking member such as an anchor bolt.

By applying a water repellent to the back surface of the natural stone tile 1, the concrete does not seep from the back surface side to the front surface side, and the aesthetic appearance of the stone tile can be maintained for a long period of time. Further, the effect is further increased by applying the water repellent to the entire natural stone tile 1.

In the above-described embodiment, the natural stone tiles 1 are used in one concrete panel 3.
Although a configuration in which 0 sheets are arranged is shown, the present invention is not limited to this, and naturally includes, for example, 4 to 16 natural stone tiles or 36 or more natural stone tiles. . Further, the dovetail groove 2 formed in the natural stone tile 1 is not limited to the horizontal direction, but is a vertical direction or a combination of the horizontal direction and the vertical direction, or a combination of various shapes, and further, a linear or A curved combination may be used.

[0022]

As described above, the natural stone tile for the PC method according to the present invention is a natural stone tile for decorating the surface of a concrete panel used in the PC method.
The natural stone tile is formed to have a relatively small thickness, at least one side of not more than 230 mm, and one or more dovetail grooves formed on the surface in contact with the concrete. Since the tile is formed thin, it can follow the thermal expansion force of concrete, and since the concrete groove is improved by the dovetail groove, it does not peel or crack even when applied to concrete panels It has an excellent effect.

Further, the concrete panel according to the present invention has a structure in which the natural stone tile and the concrete are integrally formed by the concrete manufacturing method of the PC method, so that a connecting member or the like is provided between the natural stone tile and the concrete. There is no need to provide an interference material, and an excellent effect that it can be provided at low cost is achieved.

[Brief description of the drawings]

FIG. 1 is a perspective view of a back side of a natural stone tile for a PC method showing an embodiment according to the present invention.

FIGS. 2A to 2D are enlarged views of only a main part showing some examples of dovetail grooves formed on the back side of the natural stone tile.

FIG. 3 is a perspective view of a concrete panel to which the natural stone tile is applied.

FIG. 4 is a perspective view of another example of a concrete panel to which the natural stone tile is applied.

[Explanation of symbols]

1 ... natural stone tile, 2 ... groove, 3 ... concrete panel, 3a ... concrete layer for bonding.

Claims (3)

[Claims] 1. A natural stone tile for decorating a surface of a concrete panel used in a PC method, wherein the natural stone tile is formed to have a relatively small thickness, and one or more natural stone tiles are provided on a surface in contact with the concrete. A natural stone tile for a PC method characterized by having a dovetail groove. 2. The thickness of the natural stone tile is 5 to 20 mm.
The natural stone tile for PC method according to claim 1, wherein the width of the dovetail groove is 3 mm or more and the depth is 1 mm or more. 3. By the concrete method of the PC method,
3. A concrete panel, wherein the natural stone tile according to claim 1 and concrete are integrally formed.