JP2018197477A - Floating repair method of outer wall with tiles direct-stuck thereon - Google Patents

Abstract

To prevent tile exfoliation due to the floating generated between a concrete skeleton and bonding mortar on the outer wall with tiles direct-stuck thereon.SOLUTION: A floating repair method of an outer wall with tiles direct-stuck thereon, includes: a boring process of boring a hole part reached to a concrete skeleton at a substantially central part of the tile located on the region where floating is generated between the concrete skeleton and bonding mortar on the outer wall with the tiles direct-stuck thereon; an anchor pin fixing process of inserting an anchor pin with an inlet into the hole part to fix the anchor pin with the inlet at the hole part; and an adhesion process of injecting an injection material from the inlet of the anchor pin with the inlet and dispersing the injection material to the wider region than the tile where the hole part is formed, to adhere the concrete skeleton and the bonding mortar.SELECTED DRAWING: Figure 1

Description

  TECHNICAL FIELD The present invention relates to a repair method for preventing tile peeling due to floating generated between a concrete frame and a mortar on a tile direct outer wall obtained by bonding tiles directly to a concrete frame with a mortar.

FIG. 4 shows a cross-sectional view of a tile outer wall having a conventional base mortar. In the present specification, the same members are denoted by the same reference numerals.
Conventionally, the tile 3 is attached to the outer wall of the tile through the base mortar 8 for flattening the unevenness of the surface of the concrete casing 1 (hereinafter referred to as the casing) and the tension mortar 2 on the base mortar 8 ( FIG. 4).
However, from the viewpoints of improving the accuracy of the housing and reducing the unevenness, and reducing costs, shortening the construction period, saving labor, etc., in recent years, mainly in condominiums, the mortar is directly attached to the housing without using the base mortar. Construction by the “Tile Direct Tension Method” in which tiles are laminated is increasing rapidly. FIG. 3 shows a cross-sectional view of the outer wall of the tile tile by the tile tile construction method.
In the tile direct stretching method, the tension mortar 2 is applied directly on the surface of the casing 1, and the tile 3 is adhered with the tension mortar 2.

  The outer wall of the tile is directly attached to the surface of the frame, and the surface of the frame is smooth and has few fine irregularities, and the surface of the frame is even smoother in high-strength concrete. For example, the adhesion between the mortar and the casing may be inferior. If peeling (hereinafter also referred to as floating) occurs between the frame and the mortar, the tile will fall off in the event of an earthquake or the like, and a major accident such as death or injury may occur due to the fall of the tile from a high place.

  There is a method of changing tiles to repair the floating of the mortar. However, when tiles are replaced, the removed tiles become a large amount of industrial waste. Moreover, it is difficult to prepare the same tile as the conventional color tone, and the aesthetics of the building may be impaired.

As another method, Patent Document 1 discloses a method for repairing a tile disposed on a base wall via an adhesive member, in which a hole that penetrates the adhesive member is formed in a joint formed around the tile. A method for repairing a tile has been proposed in which an injection material is injected into this hole portion and the injection material is diffused in a region wider than the hole portion around the hole portion, thereby bonding the base wall and the adhesive member. .
Here, when an injection material is injected, a phenomenon called co-floating in which the float further floats around the injected hole portion occurs. The co-floating is due to the pressure at the time of injection of the injection material, and gradually settles as the injection material diffuses and its thickness decreases. However, the joints on the outer wall of the tile are more fragile than the tiles. Therefore, in the repair method in which the injection material is injected from the hole formed in the joint around the tile proposed in Patent Document 1, injection is performed little by little. It is necessary to carry out slowly, and cracks may occur in the joints around the hole due to co-floating.

JP2015-117542A

  This invention makes it a subject to prevent the tile peeling by the floating which generate | occur | produced between the concrete frame and the pasting mortar in the outer wall directly attached to the tile.

1. A perforating step of perforating a hole reaching the concrete housing at a substantially central portion of the tile located in a region where the float is generated between the concrete housing and the mortar of the tile direct outer wall;
Anchor pin fixing step for fixing the anchor pin with the inlet into the hole,
An adhesive step of injecting an injection material from an injection port of the anchor pin with the injection port, diffusing the injection material in a region wider than the tile in which the hole is formed, and bonding the concrete frame and the tensioning mortar;
A floating repair method for a tile-directed outer wall, characterized by comprising:
2. The injection material is a high-viscosity type specified by JIS A6024. Repair method described in 1.
3. A plurality of holes are perforated at intervals of 20 cm or more and 35 cm or less. Or 2. Repair method described in 1.

  The repairing method of the present invention is characterized in that a hole is drilled in a substantially central portion of the tile, and an injection material is injected from the hole. Since tiles are superior in strength to joints, cracks in tiles and joints are unlikely to occur even if co-floating occurs. In the repair method of the present invention, tile and joint cracks due to co-floating are unlikely to occur, so a high viscosity injection material can be used. The high-viscosity injection material is filled in the interior of the float without any gaps, so the tile direct outer wall that has been subjected to the repair method of the present invention has excellent peel strength, and the occurrence of float and tile peeling for a long time. Can be prevented.

Sectional drawing of the tile direct tension outer wall which is one embodiment with which the repair construction method of this invention was constructed. The front view of the tile direct tension outer wall which is one embodiment by which the repair construction method of this invention was constructed. Cross section of tile wall Sectional drawing of the tile outer wall which has the conventional foundation | substrate mortar.

The present invention relates to a repair method for preventing tile peeling due to floating generated between a concrete frame and a mortar on a tile direct outer wall.
Specifically, the repair method of the present invention is:
1. 1. Drilling step of drilling a hole reaching the concrete frame at a substantially central part of the tile located in a region where the floating between the concrete frame and the mortar of the tile direct outer wall is generated. 2. Anchor pin fixing step of fixing the anchor pin with the inlet into the hole. An adhesion step of injecting an injection material from an injection port of the anchor pin with the injection port, diffusing the injection material in a wider area than the tile in which the hole is formed, and bonding the concrete frame and the tension mortar. It is characterized by providing.

FIG. 1 shows a cross-sectional view of an outer wall directly attached to a tile, which is an embodiment in which the repair method of the present invention is applied, and FIG. 2 shows a front view thereof.
1 and 2, the tile direct tension outer wall subjected to the repair method includes a housing 1, a mortar 2, a tile 3, and an injection material 4 filled in a float between the housing and the mortar. . The tile 3 has a size of 45 mm × 95 mm, which is the most general size and is called a so-called 45 double-clad tile. There is a joint between adjacent tiles 3. The example shown in FIGS. 1 and 2 is one embodiment, and the repair method of the present invention is not limited to this embodiment. For example, the tile is not limited to 45 two-cable tiles. In addition, in order to smooth the unevenness generated on the joint surface of the concrete, the joint of the formwork, etc. in the frame, the unevenness adjustment may be performed partially by the ground adjustment mortar, but the repair method of the present invention Includes those that partially have a ground preparation mortar between the housing and the mortar.
Hereinafter, the repair method according to an embodiment of the present invention will be described with reference to FIGS.

"Drilling process"
First, lightly inspect the surface of the outer wall of the tile directly using a test hammer, etc., confirm the floating of the mortar that has peeled off the frame, and mark the floating area. If necessary, the width of the floating allowance (interval between the housing and the mortar) is confirmed by an endoscope or the like.
A reference hole 5 is drilled in a portion having the largest floating allowance in the floating region or a substantially central portion of the tile located at the center of the floating region using a non-vibrating drill or the like. Further, in the floating region, a plurality of holes are drilled in the approximate center of the tile at intervals of about 30 cm vertically and horizontally from the reference hole 5. At this time, in a part within half of the gap between the holes from the end of the floating area, for example, in the repair method that is one embodiment in which the gap between the holes is 30 cm, the part within 15 cm from the edge of the floating area It is preferable not to drill the hole. If the hole is close to the end of the floating region, the floating region may expand due to co-floating that occurs when an injection material is injected into the hole. The hole is drilled so as to have a depth of 20 mm or more in the housing. In addition, so-called two-stage excavation is performed in which a shallow hole having a diameter larger than the hole diameter of the hole part is accommodated in the opening part of the hole part 5 to accommodate a decorative cap 7 described later.

  Moreover, a hole for air bleeding can be provided at an end portion or the like in the floating region. The air vent hole is for releasing an internal gas at the time of injecting the injection material and suppressing co-floating, and no anchor pin is inserted or the injection material is not injected. The air vent hole may be provided in either the tile or the joint, but it is preferable to provide in the joint because the hole filling after the construction is easy.

  Here, in the repair method of the present invention, the interval between the holes is preferably 20 cm or more and 35 cm or less. If the space | interval of a hole part is less than 20 cm, the number of the hole parts to drill | pierce will increase and will require a work. When the interval between the holes is larger than 35 cm, the amount of the injected material to be injected into one hole increases, and it becomes difficult to spread in a circle centering on the holes. In addition, although it is easy to provide a plurality of hole portions so that the positions of the apexes of the rectangle are vertically and horizontally, it is not limited to such an arrangement, and for example, it may be provided so as to be the apex position of a triangle it can.

"Anchor pin fixing process"
After removing dust that hinders adhesion from the inside of the hole 5 with compressed air or the like, the anchor pin 6 with an injection port is inserted into the hole 5. The anchor pin 6 with a filling port has a hollow shaft shape, and has a structure in which an injection port is formed in the head, a slit is formed from the vicinity of the front end portion of the side wall to the middle, and the housing is bitten when the front end portion is expanded. The tip end portion of the anchor pin 6 with the injection port inserted into the hole 5 is expanded by a driving rod or the like to be bitten into the housing 1 and firmly fixed.

"Adhesion process"
The injection material 4 is injected from the injection port of the anchor pin 6 with an injection port using a manual injector or the like. The injection material 4 passes through the inside of the anchor pin 6 with the injection port having a hollow shaft shape, further moves from the inside of the anchor pin 6 with the injection port to the outside through the slit, and diffuses in a circle around the hole 5 in the float. To do. At this time, the injection material causes co-floating around the hole portion, but the present invention has a hole portion drilled in the substantially central portion of the hard tile as compared with the joint, so even if co-floating occurs. Can prevent cracking of tiles and joints.

  As an injection material, if it has thixotropy (thixotropy) and a viscosity that does not flow down in the float, use an epoxy resin, acrylic resin, etc. without any particular limitation. The high-viscosity type specified by JIS A6024 is preferable because it can diffuse slowly in the float and firmly bond the housing and the mortar. Among the high-viscosity types, those having a slump property of 3.0 or less according to JIS A6024 are more preferable, those having a slump property of 1.0 or less are more preferable, and those having a viscosity according to JIS K6833 of 21000 mPa · s or more and 35000 mPas. -S or less (medium viscosity form is 5000-20000 mPa.s) is most preferable because of excellent thixotropic properties. As such a high-viscosity injection material excellent in thixotropic properties, commercially available products can be used as appropriate. The high-viscosity type tends to increase co-floating immediately after injection due to slow diffusion, but the repair method of the present invention perforates a hole in the substantially central portion of the tile having excellent strength. Even if the float is large, the tiles and joints can be prevented from cracking.

The present invention is characterized in that the injection material is diffused in a wider area than the tile in which the hole portion is formed. However, in the repair method according to one embodiment, the injection material 4 has a hole portion around the hole portion 5. The injection is performed in an amount capable of filling a circular region having a diameter of 30 cm, which is the same diameter as the interval of the portions 5. In the repair method according to one embodiment, the injection material is diffused in a region having a diameter of 30 cm around nine holes provided at intervals of 30 cm with respect to a floating region of 0.81 m ² = 90 cm × 90 cm, The injection region where the injection material is diffused is 0.636 m ² = 15 cm × 15 cm × π × 9. Therefore, in the repair method which is one embodiment, the adhesion ratio is 78.5% (= 0.636 / 0.81). Adhesion ratios stipulated in the “Architecture Standard Specification / Description JASS19 Ceramic Tile Construction” of the Architectural Institute of Japan (JASS) is 60% or more. The floating area can be repaired to prevent the tile from peeling off. Actually, since there is an uninjected region in which no injection material is present, stress concentration is mitigated, so that the effect of suppressing peeling is higher than in the case where the entire surface of the floating region is filled with the injection material. However, according to the request of the owner, etc., for example, the center of the four holes drilled at the apex position of the quadrilateral is drilled to form a circular area having a diameter of about 10 cm so as to reduce the uninjected area. It is also possible to inject an injection material into the substrate to further increase the adhesion ratio.

Here, the floating region may be widened by co-floating when the injection material is injected into the floating region. In order to suppress the spread of the floating region due to co-floating, an assist hole portion is drilled around the floating region before the bonding step, and an anchor pin is driven into the assist hole portion (hereinafter referred to as the assist hole portion). The anchor pin to be driven is referred to as an assist pin), and the assist pin may be fixed to the housing in the same manner as the anchor pin fixing step, and the injection material may be filled into the assist hole.
Since the assist hole is drilled outside the floating region, the injection material is filled only in the assist hole. Then, when the injection material is cured in the assist hole portion, the tension mortar around the assist hole portion is firmly fixed to the housing by the assist pin and the injection material. Therefore, even if a force for peeling the tension mortar due to co-floating is applied to the vicinity of the assist hole portion positioned around the floating region, it is possible to suppress the floating region from spreading.

  Finally, the injection material 4 protruding from the hole 5 is removed, and a decorative cap 7 baked in the same color as the tile is driven into the opening of the hole using a plastic hammer or the like. Moreover, the air vent hole is backfilled as necessary. By making the makeup cap similar in color to the tile, it is difficult to visually recognize that the repair work has been carried out, the texture and landscape of the building can be maintained, and the deterioration of its asset value can be prevented.

DESCRIPTION OF SYMBOLS 1 Housing 2 Tightening mortar 3 Tile 4 Injection material 5 Hole 6 Anchor pin 7 with an inlet 7 Cosmetic cap

8 Ground mortar

Claims (3)

A perforating step of perforating a hole reaching the concrete housing at a substantially central portion of the tile located in a region where the float is generated between the concrete housing and the mortar of the tile direct outer wall;
Anchor pin fixing step for fixing the anchor pin with the inlet into the hole,
An adhesive step of injecting an injection material from an injection port of the anchor pin with the injection port, diffusing the injection material in a region wider than the tile in which the hole is formed, and bonding the concrete frame and the tensioning mortar;
A floating repair method for a tile-directed outer wall, characterized by comprising: 2. The repair method according to claim 1, wherein the injection material is a high-viscosity type specified by JIS A6024. The repair method according to claim 1 or 2, wherein a plurality of holes are drilled at intervals of 20 cm or more and 35 cm or less.

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