JP2002256674A - Finishing backing sheet and wall construction method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wall construction method capable of strongly adhering a finishing material to a concrete building frame by using a finishing backing sheet, which is capable of providing a sufficient anchoring effect between concrete and mortar when adhering the finishing material to the concrete building frame by using mortar and definitely obtaining an improved effect of the jointing strength between concrete and mortar. SOLUTION: A backing sheet 10 for finishing has fluff on both sides. The bluff on one surface 10A have water repellency. This backing sheet 10 for finishing is attached to the inner surface of the form 6 with the water repellent surface 10A facing the inner surface of the form 6. Concrete 1 is poured to the form 6, after removing the form in such a manner that the backing sheet 10 for finishing remains on the concrete surface, the finishing material 4 is adhered to the concrete surface by using mortar 2 and 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a base sheet for finishing which is attached to a concrete surface in order to increase the bonding strength between concrete and mortar when a finishing material such as a tile is stuck to a concrete base using mortar.
The present invention relates to a wall construction method using the base sheet for finishing.

[0002]

2. Description of the Related Art As one method of a wall construction method for attaching a finishing material such as a tile to a concrete body such as an outer wall of a building, a mortar (base mortar) is applied to the concrete surface, and a mortar is further applied on the base mortar. Attachment of the finishing material is carried out by using.

However, the method of directly applying mortar to the concrete surface as described above has a problem that the mortar layer is easily peeled off because the mortar layer is not sufficiently bonded to the concrete surface because the concrete surface is smooth. Was. In addition, not only the initial bonding strength but also a seasonal temperature change and vibrations caused by an earthquake or the like cause a problem that mortar is easily peeled off from the concrete surface over time.

Conventionally, in order to solve such a problem,
As shown in FIG. 3, at the interface between the concrete 1 and the mortar 2, a finishing base sheet 3 having naps on both sides such as a non-woven fabric is interposed. There has been proposed a method for increasing the bonding strength with the mortar 2 and preventing the mortar 2 from peeling off. The finishing material such as the tile 4 is further adhered on the mortar 2 by using an adhering mortar 5.

In order to sufficiently obtain the effect of improving the bonding strength between the concrete 1 and the mortar 2 by interposing the finishing base sheet 3, the finishing base sheet 3 is required.
So that it straddles both concrete 1 and mortar 2,
That is, as shown in FIG. 3, the nap on one side of the finishing base sheet 3 is embedded in the concrete 1, and the nap on the other side is embedded in the mortar 2.
It is necessary to intervene.

[0006]

However, in the conventional method, it is difficult to provide the finishing base sheet 3 over both the concrete 1 and the mortar 2, and in many cases, the finishing base sheet 3 is not provided. It was buried in the concrete 1, so that the effect of providing the finishing base sheet 3 was not sufficiently obtained.

This is for the following reason. That is, when such a finishing base sheet 3 is provided, as shown in FIG. 4A, the finishing base sheet 3 is previously attached to the inner surface of a formwork 6 for constructing a concrete frame, and thereafter, the formwork is formed. 6
Concrete 1 is cast in the interior (FIG. 4 (b)). After the concrete 1 has hardened, the mold 6 is removed (FIG. 4C). For this reason, the uncured concrete cement paste permeates into the finishing base sheet 3 attached to the formwork 6, and hardens while the cement paste is impregnated in the finishing base sheet. 4
As shown in (c), the finishing base sheet 3 is entirely buried in the surface layer of the concrete 1. For this reason, it is not possible to obtain the anchoring effect due to the nappedness of the finishing base sheet 3.

The present invention solves the above-mentioned conventional problems, and when a finishing material is stuck to a concrete skeleton using a mortar, a sufficient anchoring effect can be obtained between the concrete and the mortar. It is an object of the present invention to provide a base sheet for finishing that can reliably obtain the effect of improving the bonding strength with the concrete, and a wall construction method for firmly attaching a finishing material to a concrete skeleton using such a base sheet for finishing. .

[0009]

According to a first aspect of the present invention, there is provided a finishing base sheet having raised hairs on both sides, wherein the raised hairs on one side have water repellency. It is characterized by.

In the case of this finishing base sheet, the surface of the raised hair is made water-repellent (hereinafter, this surface may be referred to as "water-repellent surface" and the other surface may be referred to as "non-water-repellent surface"). When the concrete is poured into the formwork facing the inside of the formwork and concrete is poured, the cement paste of concrete permeates into the non-water-repellent side of the base sheet for finishing, but the water-repellent side repels the cement paste. Does not penetrate. For this reason, the raised hair on the water-repellent surface side of the finishing base sheet is not embedded in the concrete, and the concrete hardens, so that a good anchoring effect can be obtained by the raised hair of the finishing base sheet protruding from the concrete. .

In this finishing base sheet, it is preferable that a water repellent is attached to the nap on one surface, thereby making the nap water-repellent.

In the wall method according to the first aspect of the present invention, the finishing base sheet of the present invention is mounted on the inner surface of the mold with the water-repellent surface facing the inner surface of the mold. A step of casting concrete, a step of demolding the base sheet for finishing so as to remain on the concrete surface, and a step of attaching a finishing material to the concrete surface using mortar. The non-water repellent side of the sheet is embedded in the concrete, and mortar is attached with high bonding strength to the concrete surface with the finishing base sheet so that the raised hair on the water repellent side protrudes from the concrete surface, and the finishing material is attached. Can be

[0013] A finishing base sheet according to a second aspect of the present invention is characterized in that in the finishing base sheet having naps on at least both sides, a setting retarder is attached to the naps on one side. .

In the base sheet for finishing, the surface on which the setting retarder is attached to the nap (hereinafter, this surface is referred to as a "setting delay surface") is attached to the inner surface of the mold with the inner surface facing the inner surface of the mold. When concrete is poured in, the concrete cement paste permeates into the base sheet for finishing and the concrete is hardened while the finishing base sheet is embedded in the concrete. Is located on the concrete surface side, so the hardening of the concrete surface is delayed. Therefore, by removing the fragile portion of the concrete surface where the strength is not developed by washing with water or the like, the finishing base sheet can be easily exposed, and the nap can be projected. For this reason, a good anchoring effect can be obtained by the raised napped of the finishing base sheet.

In the wall construction method according to the second aspect of the present invention, such a finishing base sheet is made of concrete by using a mold attached to the inner surface of the form with its hardening retarding surface facing the inner surface of the form. Casting step, demolding step so that the finishing base sheet remains on the concrete surface, and exposure treatment step of exposing the finishing base sheet from the concrete,
Attaching a finishing material to the concrete surface using mortar, and attaching the finishing material by attaching the mortar to the concrete surface with high bonding strength by raising the exposed base sheet for finishing. Can be.

In this method, the step of exposing the base sheet for finishing is preferably a step of removing concrete with water.

[0017]

Embodiments of the present invention will be described below in detail with reference to the drawings.

First, an embodiment of a base sheet for finishing and a wall construction method according to a first embodiment of the present invention will be described with reference to FIG.

The finishing base sheet 10 has naps on both sides, and impregnated with a water-repellent agent on one side so that the naps on this side are made water-repellent water-repellent surfaces 10A, and the other side is non-repellent. Water surface 10B.

The water-repellent surface 10A of the finishing base sheet 10
Is directed toward the inner surface of the formwork 6 and the finishing base sheet 10 is attached to the inner surface of the formwork 6 (FIG. 1A), and then concrete is poured into the formwork 6 (FIG. 1B). Since the water-repellent surface 10A of the base sheet 10 for finishing repels the cement paste of the concrete 1 due to its water repellency, the cement paste of the concrete 1 does not penetrate to the side of the water-repellent surface 10A of the base sheet 10 for finishing. The concrete 1 permeates only into the non-water-repellent surface 10B of the sheet 10. For this reason, when the mold 6 is released after the concrete 1 has hardened, the non-water-repellent surface 10B side of the finishing base sheet 10 is embedded in the concrete 1, and the raised hair on the water-repellent surface 10A is exposed from the surface of the concrete 1. It is in the state of being released (Fig. 1
(C)).

When the tiles 4 are adhered to the mortar 2 and the mortar 5 on the concrete 1 on which the raised hairs of the water-repellent surface 10A protrude, the raised base sheet 10 is embedded in the concrete 1 with the non-water-repellent surface 10B. The raised hairs of the water-repellent surface 10A are hardened in the mortar 2 while being buried in the mortar 2, so that a good anchoring effect between the concrete 1 and the mortar 2 can be obtained, and the joining strength can be improved. .

Since the mortar 2 is applied to one surface of the concrete by pressing it with a trowel or the like, even if the surface of the base sheet 10 for finishing is a water-repellent surface 10A, the mortar sufficiently penetrates the water-repellent surface 10A. Adheres and cures. Therefore, there is no problem such as poor joining caused by making the surface of the finishing base sheet 10 the water-repellent surface 10A.

Base sheet 1 for finishing used in the present embodiment
No. 0 can be easily manufactured by spray-coating a water-repellent agent to the nap on one surface. In addition, as the finishing base sheet 10, a nonwoven fabric, a fluffy net, a net having loop-like raised hair, or the like generally used in a conventional wall method can be used.

Next, an embodiment of a finishing base sheet and a wall construction method according to a second aspect of the present invention will be described with reference to FIG.

The finishing base sheet 20 has naps on both sides, and a setting retarder is attached to at least one of the naps to form a hardening delay surface 20A.

Curing delay surface 2 of this finishing base sheet 20
The base sheet 10 for finishing is attached to the mold 6 with 0A facing the inner surface of the mold 6 (FIG. 2A), and then the concrete 1 is poured into the mold 6 (FIG. 2B). The cast concrete 1 penetrates the finishing base sheet 20 and reaches the inner surface of the formwork 6 and hardens, as in the conventional method.
On the curing retardation surface 20A side of the base sheet for finishing 20, the strength development is delayed by the action of the curing retardant to become a fragile portion (FIG. 2).
(B)). Accordingly, the surface 1A of the concrete 1 obtained by removing the mold 6 from the mold 1 with the finishing base sheet 20 embedded therein.
Is a fragile part that is still insufficiently hardened (Fig. 2
(C)) The fragile surface 1A can be easily removed by washing with a deck brush or the like or by spraying high-pressure water of about 3 to 50 MPa. As a result, the base sheet for finishing 20 is exposed, and one surface of the base sheet for finishing 20 is embedded in the concrete 1, and the nap on the other surface can be exposed from the surface of the concrete 1 (FIG. 2 (d)).

When the tiles 4 are attached to the mortar 2 and the mortar 5 on the surface of the concrete on which the raised hairs of the finishing base sheet 20 protrude, the finishing base sheet 2
The nap of one surface of the mortar 0 is buried in the concrete 1 and the nap of the other surface is buried in the mortar 2 so that the mortar 2 hardens, so that a good anchoring effect between the concrete 1 and the mortar 2 is obtained. Is obtained, and the bonding strength can be improved.

The mortar 2 is applied to one surface of the concrete by pressing with a trowel or the like. Since at least one of the curing retarders of the base sheet for finishing 20 has been washed away by washing with water, the curing retardation of the mortar 2 hardly occurs.

Base sheet 2 for finishing used in the present embodiment
0 indicates that a curing retarder is attached to at least one surface, and the curing retarder may be attached to both surfaces of the base sheet for finishing 20. Even if the curing retardant is attached to both sides of the base sheet for finishing 20, one side is embedded in the concrete and the other side is The base sheet for finishing can be exposed so that the napped hairs project.

The curing retarder may be attached to the base sheet for finishing by spraying or the like. Further, the finishing base sheet may be impregnated with a liquid of a curing retarder and adhered to the entire surface of the finishing base sheet. In this case, the work of applying the curing retarder can be performed efficiently. As the setting retarder, those used as ordinary setting retarders for cement, for example, a retarder (a substance obtained by adding about 0.5 to 5% of sugar to an organic paste), a jointing agent and the like can be used.

Also in this embodiment, as the finishing base sheet, a nonwoven fabric, a fluffy net, a net having a loop-like nap, and the like generally used in a conventional wall method can be used.

According to the present invention, a water-repellent treatment is applied to the finishing base sheet without changing the design of the formwork, concrete, mortar, etc., and using the conventional base sheet itself. It can be easily carried out only by attaching a curing retarder, and the anchoring effect by using the base sheet for finishing can be reliably obtained.

[0033]

As described above in detail, the base sheet for finishing of the present invention can be provided on the concrete surface so that the nap on one side protrudes from the concrete. When attaching the finishing material, a sufficient anchoring effect can be provided between the concrete and the mortar, and the effect of improving the joining strength between the concrete and the mortar can be reliably obtained.

According to the wall construction method of the present invention using such a finishing base sheet, the finishing material can be firmly attached to the concrete skeleton.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view illustrating an embodiment of a finishing base sheet and a wall method according to a first embodiment of the present invention.

FIG. 2 is a schematic cross-sectional view illustrating an embodiment of a finishing base sheet and a wall method according to a second embodiment of the present invention.

FIG. 3 is a cross-sectional view illustrating a wall construction method using a finishing base sheet.

FIG. 4 is a cross-sectional view illustrating a conventional method.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Concrete 2,5 Mortar 3 Finishing base sheet 4 Tile 6 Formwork 10 Finishing base sheet 10A Water-repellent surface 10B Non-water-repellent surface 20 Finishing base sheet 20A Curing delay surface

Continued on the front page F term (reference) 2E110 AA27 AA47 AB04 AB22 BA12 BC14 CA03 CA17 CA23 DA12 DC21 EA09 GA32Y GA34W GB24Y GB24Z GB26W

Claims (6)

[Claims] 1. A base sheet for finishing having naps on both sides, wherein the nap on one side has water repellency. 2. The finishing base sheet according to claim 1, wherein a water-repellent agent is attached to the nap on the one surface, whereby the nap has water repellency. 3. A step of casting concrete using a formwork having a finishing base sheet attached to an inner surface thereof, a step of removing the finishing base sheet so that the finishing base sheet remains on the concrete surface, A step of attaching a finishing material using a mortar, wherein the base sheet for finishing according to claim 1 or 2 is attached to the inner surface of the form with the one surface facing the inner surface of the form. A wall construction method characterized by that. 4. A finishing base sheet having naps on both sides, wherein a setting retarder is attached to at least one nap. 5. A step of casting concrete using a formwork having a base sheet for finishing attached to an inner surface of the formwork, a step of removing the finish so that the base sheet for finishing remains on the concrete surface, and a step of removing the concrete. A step of attaching a finishing material to the surface using a mortar, wherein the finishing base sheet of claim 4 is attached to the inner surface of the form with the one surface facing the inner surface of the form. A wall construction method, comprising: after the mold release, performing an exposure treatment step of exposing the finishing base sheet from concrete, and then attaching a finishing material. 6. The wall construction method according to claim 5, wherein the exposing step is a concrete removing step using water.