JP2590634B2 - How to build wall concrete - 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 of casting wall concrete, and more particularly, to a method of placing wall concrete which is suitably used for construction of a wall to be tiled.

[0002]

2. Description of the Related Art Conventionally, in order to form a tile wall surface, uncured concrete is first poured into a formwork and then removed from the mold to construct a concrete wall. Then, as shown in FIG.
A foundation mortar 2 is applied to the wall surface of the concrete wall 1, and a tile 4 with a mortar 3 attached on the back surface is pressed against the foundation mortar 2. In addition, as shown in FIG. 12, the base mortar is omitted, and the tile 4 is directly attached to the concrete wall 1 using only the attaching mortar 3.

In the conventional method of constructing a concrete wall, the wall surface of the concrete wall to be formed has a flat finished surface as the inner surface of the formwork. For this reason, the adhesion between the wall surface of the concrete wall 1 and the foundation mortar 2 or the attaching mortar 3 is not sufficiently achieved, and the foundation mortar 2 or the attaching mortar 3 is easily peeled off from the concrete wall 1, causing a tile falling accident. is there.

In order to solve such a problem, Japanese Patent Publication No. 50-37171 discloses a method in which a sponge piece is attached to a mold surface to absorb moisture in concrete into which the sponge piece is cast. It is described that the concrete surface after demolding swells and a concave portion is formed on the concrete surface, thereby increasing the adhesive force of the underlying mortar.

However, when the method of Japanese Patent Publication No. Sho 50-31371 was actually tested, it was found that the cement component in the concrete penetrated into the sponge, the sponge became hard, and the sponge and concrete adhered to the sponge. However, there is a problem that a strong force is required, and the periphery of the concave portion is easily damaged when the mold is removed. Further, there is a problem that the sponge remains in the concave portion and the adhesion of the base mortar is impaired.

Although it has been considered to attach a ball-shaped hollow body to the inner surface of the mold in place of the sponge pieces, it is troublesome to attach the sponge pieces one by one.

The present applicant has solved the above conventional problems,
Japanese Patent Application No. 3-104173 discloses a method of casting wall concrete suitable for construction of a wall surface to be tiled, that is, a wall surface capable of forming a wall surface having extremely excellent bondability with a base mortar or a pasting mortar. No. 4-333664)
(Hereinafter abbreviated as prior application).

[0008] The prior application of a method of casting wall concrete is a method of casting uncured concrete into a form, which comprises adding a non-water-absorbing soft sheet having a large number of ridges to the surface of the form. A method of casting wall concrete in which a plurality of pieces are attached to the inner surface and a dovetail-shaped recess is formed on the hardened concrete surface, wherein the soft sheet has A ridge extending in the longitudinal direction of the ridge is formed. In the method of the prior application, the soft sheet is peeled off at the time of demolding.

In the method of the prior application, a soft sheet having a large number of ridges is attached to the inner surface of a mold for casting uncured concrete. A groove derived from the strip is formed. Since this soft sheet is non-water-absorbing, it has good releasability (releasability) from concrete.

The concrete wall having such a groove has a very high joining strength with the mortar, and when the tile is stuck with the base mortar or the sticking mortar, the tile is prevented from falling off.

[0011]

SUMMARY OF THE INVENTION In the method of the prior application,
After casting the concrete, the mold was removed from the mold, and at that time, the work of peeling off the soft sheet from the hardened concrete surface was necessary, and the work was required for the work of peeling off the sheet.

[0012]

According to a first aspect of the present invention, there is provided a method for constructing a wall concrete, wherein when uncured concrete is poured into a formwork to construct the wall concrete, the method has a large number of convex portions on the surface and the convexity. A soft sheet, which is a concave portion communicating with the back surface inside the convex portion, is attached to the inner surface of the formwork, and the convex portion is deformed into a thick tape by the lateral pressure of the concrete poured, and an ant-like concave portion is formed on the concrete surface. After the concrete is hardened, the soft sheet is left and removed from the mold, and mortar is applied from above the soft sheet.

According to a second aspect of the present invention, there is provided a method of constructing a wall concrete.
When constructing wall concrete by casting uncured concrete into a formwork, a sheet having a large number of tapered convex portions on the surface and an ant-shaped concave portion communicating with the back surface in the convex portion. Is attached to the inner surface of a mold, and after the concrete is poured and hardened, the sheet is left and removed from the mold, and mortar is applied from above the sheet.

[0014]

In the method according to the first aspect, when concrete is poured into the formwork, the convex portion is deformed into a thick portion by the lateral pressure of the concrete, and the hollow concave portion in the convex portion narrows on the back surface of the sheet. It becomes ant-like. When hardened with concrete,
This recess becomes an ant-shaped recess as it is.

Then, when the mold is removed from the mold and the sheet is left, the concrete surface has a large number of dovetailed concave portions.

Then, when the mortar is applied to the concrete surface and tiled, the mortar enters the ant-shaped concave portion, and after the mortar hardens, the mortar becomes mechanically and firmly bonded to the concrete surface. . For this reason, even if the sheet is left, the tile can be firmly stuck.

In the method according to the second aspect, the convex portion of the sheet is previously thick and has an ant-shaped concave portion in which the rear surface of the sheet is narrowed.

For this reason, after the concrete hardens, it is released,
When the sheet is left, the concrete surface has a large number of ant-shaped concave portions.

Then, when mortar is applied to the concrete surface and the mortar is hardened, the mortar is mechanically and firmly bonded to the concrete surface. Therefore, even if the sheet is left, the tile can be firmly stuck to the concrete surface and placed.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings.

FIGS. 1, 2, 3 and 4 are cross-sectional views for explaining an embodiment of a method for placing wall concrete according to the present invention, and FIG. 5 is a perspective view of a soft sheet. .

As shown in FIG. 5, this soft sheet has a large number of ridges 11a protruding on the front side. The ridge 1
The inside of 1a is a concave stripe 11b.
Communicates with the back side of the sheet 11.

In FIG. 1, the flexible sheet 11 is detachably attached to the inner surface of the mold 10. Thereafter, the uncured concrete 12 is cast according to a conventional method. Due to the lateral pressure of the concrete 12, the ridge 11a is deformed into a thick tapered shape, and the concave ridge 11b becomes a dovetail shape. After the concrete 12 has hardened, it is released from the mold.

At the time of this release, only the mold 10 is released, and the soft sheet 11 is left.

The concrete wall 13 formed by such a method is provided with a dovetail-shaped concave strip 11b of the soft sheet 11.
Having a surface configuration having For this reason, after the mortar 14, such as the base mortar or the pasting mortar, applied to the surface is hardened, the mortar 14 is very strongly mechanically bonded to the concrete wall 13 (FIG. 4). ). Therefore, a concrete wall with high tile bonding strength is formed.

In the above embodiment, the soft sheet 11 having the ridges 11a is used. However, as shown in FIG. 6, a soft sheet 21 having button-shaped projections 21a may be used.
The inside of the protrusion 21a is a concave portion 2 communicating with the back surface of the sheet.
1b. The projection 21a is deformed into a thick tip by the side pressure of the concrete, and at this time, the concave portion 21b is deformed into a dovetail shape.

In the present invention, the soft sheet having the projections or the ridges may include the shape and size of the projections or the ridges.
The number per unit area and the like are not particularly limited, and are appropriately selected so as to obtain a sufficient adhesive strength with the mortar.

There is no particular limitation on the shape or size of the concave hole or the ridge formed from the back side of the sheet, and the strength required for the ridge can be ensured. Any shape may be used as long as it is simultaneously deformed into an ant shape. The shape of the concave streak does not necessarily follow the shape of the protruding streak. For example, as shown in FIG. 9, a soft sheet 17 in which a protruding streak 17a having a trapezoidal cross section and a concave streak 17b having a rectangular cross section are combined. It may be. Further, as shown in FIG. 10, a soft sheet 18 in which a plurality of concave ridges 18b are formed on the back side of one ridge 18a may be used. In this case, the partition 18c between the concave ridges 18b acts as a rib, which is effective for reinforcing the protruding ridges 18a.

In the present invention, the convex portion is formed from the beginning (ie,
The sheet 16 may have a flattened tapered shape (even if no concrete side pressure is applied). For example, as shown in FIG. 7, the sheet 16 has a ridge 16a having a tapered flat shape and a concave groove 16b having a dovetail shape. It may be. Of course, as shown in FIG. 8, a sheet 22 having a thick protrusion 22a and a dovetail-shaped recess 22b may be used.

The method of detachably attaching such a sheet to the inner surface of the mold is not particularly limited, and various methods such as a method using a tucker or a double-sided tape can be adopted. The sheet may be provided on the entire inner surface of the mold, or may be provided only on a part thereof.

[0031]

As described in detail above, according to the method for casting wall concrete of the present invention, a concrete wall covered with a sheet having a large number of dovetail-shaped recesses can be formed easily and reliably. Since the formed concrete wall has a strong adhesive force to the mortar and a sufficiently high joining strength can be obtained, it is extremely suitable as a wall surface to be tiled. In particular, in the present invention, since the sheet is left, the work of peeling the sheet is unnecessary, and the working efficiency is extremely good.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a method according to an embodiment of the present invention.

FIG. 2 is a sectional view showing a method of one embodiment of the present invention.

FIG. 3 is a sectional view showing a method of one embodiment of the present invention.

FIG. 4 is a sectional view showing a method of one embodiment of the present invention.

FIG. 5 is a perspective view of a soft sheet 15;

FIG. 6 is a perspective view of a soft sheet 21.

FIG. 7 is a perspective view of a soft sheet 16;

FIG. 8 is a perspective view of a soft sheet 22.

FIG. 9 is a cross-sectional view of a soft sheet 17;

FIG. 10 is a sectional view of a soft sheet 18.

FIG. 11 is a sectional view showing a tiling method.

FIG. 12 is a sectional view showing a tiling method.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Formwork 11 Soft sheet 11a Protrusion 11b Concave 12 Unhardened concrete 13 Concrete wall 13a Recess 14 Mortar

Claims (2)

(57) [Claims] 2. Description of the Related Art When constructing wall concrete by placing uncured concrete into a formwork, a soft sheet having a large number of convex portions on the surface and a concave portion communicating with the back surface in the convex portion is used. It is attached to the inner surface of the mold, and the convex portion is deformed to a thick shape by the lateral pressure of the poured concrete to form an ant-like concave portion on the concrete surface, and after the concrete is hardened, the soft sheet is left and removed from the mold. Mortar is applied from above the soft sheet. 2. When a wall concrete is constructed by placing unhardened concrete into a formwork, a dovetail-shaped recess having a large number of tapered projections on the surface and communicating with the back surface in the projections. The sheet is attached to the inner surface of the formwork, and after the concrete is cast and hardened, the sheet is left and removed from the mold, and mortar is applied from above the sheet. How to build wall concrete.