JPH06280401A - Repair work of external wall by use of exfoliation preventive net - Google Patents

Abstract

PURPOSE:To prevent an external wall face newly formed on an existing wall face, from coming off. CONSTITUTION:A glass mat 10 is fixed at a repair face 2 on a treated substrate by driving an anchor 7 to fix it. The mat 10 is immersed in epoxy resin 3. After a net 4 preventing exfoliation thereof is spread on the glass mat 10 immersed in epoxy resin, in order to cover the repair wall face, a finishing material 9 is applied on the net 4. Accordingly, the anchor 2 is covered with the net 4 and not exposed. And hence, exfoliation resulting from the direct contact of the anchor 7 with the finishing material 9 can be avoided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention provides a stripping prevention net which enables a new outer wall surface to be formed on a damaged old wall surface without removing the damaged old wall surface due to peeling or floating. Regarding the outer wall repairing method used, in particular, when the anti-stripping net was attached to the old wall, the adhesive wall mat attached to the old wall by an anchor was used to re-strip the old wall and the new net formed on the net. The present invention relates to a method for repairing an outer wall using a peeling prevention net that reduces the occurrence of peeling, cracking, and floating of the outer wall.

[0002]

2. Description of the Related Art In a building 10 to 20 years old,
Cracks on the wall surface, deterioration due to aging of the concrete foundation, deterioration of the mortar finishing material or tile finishing material, etc. may cause peeling or floating on the outer wall.Therefore, adhesive is injected at the floating interface or the peeled surface is removed. Repair work such as rebuilding the outer wall is being done.

However, the method of injecting the adhesive into the floating interface has a problem that co-floating occurs due to the injection pressure of the adhesive.

Further, the method of removing the flaking surface and rebuilding the outer wall has a problem that the labor and cost are too much to remove the flaking surface.

As one method for solving these problems, an outer wall repairing method using a falling prevention net and an anchor is performed.

The outer wall repairing method using the exfoliation prevention net and the anchor is used as a base treatment for exfoliation, cracks,
The part of the repair surface that is likely to fall due to floating etc. is scraped off, and the part where the filling material can be injected is filled with the filling material and backfilled in advance, and then the entire surface is washed with a high pressure washer. As shown in FIG. 8, the primer 1 is applied to the repair surface 2 with a brush, a roller, or spraying. After the primer 1 is dried, a filler (putty, filler) 3 is applied to the entire repair surface 2 in a thickness of about 1 to 2 mm.
On the repair surface 2 on which the filling material 3 has been applied, the exfoliation prevention net 4 having a size that covers the entire surface of the repair surface 2 is carefully pressed with a "trowel" and adhered well to the filling material 3.

The anti-stripping net 4 is made of, for example, polyvinyl alcohol vinylon fibers having a high fiber strength, which are arranged in an equilateral triangle shape at an angle of 60 degrees in the three axial directions, and whose surface is made of an alkali-resistant thermoplastic resin adhesive emulsion. The intersections of the coated and stitches are fixed by thermal processing and are intended to exhibit strong resistance to longitudinal, lateral, and oblique tension.

A hole 6 reaching 20 to 30 mm in the base concrete skeleton 5 is drilled from above the pasted net 4 by a drill, usually about 4 holes per square meter, and after cleaning the hole 6, a washer 8 is attached. The anchor 7 is driven in, and the net 4 is fixed by the anchor 7 and the washer 8. Further, at this time, as shown in FIG. 8, an anchor 7 having an injection hole is used, and an adhesive is injected into the floating interface inside through the injection hole to prevent co-floating by the anchor 7. While repairing the floating.

In this way, the filler 3 is applied again to the exfoliation prevention net 4 fixed to the repair surface 2 by the anchor 7,
By covering the net 4 and applying a finishing material 9 such as a finishing mortar material or a lysine material on the net 4, a new outer wall surface is formed on the old wall surface where peeling or floating has occurred.
In this repair method using this anchor 7 and the exfoliation prevention net 4 which forms a new outer wall surface without removing the old outer wall surface, the anchor 7 is removed regardless of whether the existing tiles or the ground mortar floats. Since the concrete skeleton 5 is driven in, the concrete skeleton 5 and tiles and mortar can be firmly connected, and the skeleton 5 to the finishing material 9 can be firmly fixed.

Since the stripping prevention net 4 embedded under the new outer wall surface covers the entire repair surface 2, the tiles and the mortar on the repair surface 2 covered by the net 4 are prevented from peeling off and falling by integrating the wall surface. be able to.

Also, by using the net 4 which is well compatible with cement, it is possible to secure a uniform coating thickness on the newly formed outer wall surface and, moreover, leveling is easy, so that a smooth finished surface is secured. You can

The buffer layer formed by the filler 3 and the net 4 can prevent the generation of surface cracks due to vibration.

It has the following features.

[0014]

However, in the construction method using the above anchor and the anti-stripping net, since the head of the anchor for fixing the net to the net surface and the washer are exposed, the finishing material is When applied to the net,
The head and washer of the anchor are in direct contact with the finish. However, the head of the anchor and the washer are less compatible with the finishing material than the net, and the coefficient of thermal expansion of the finishing material is also different, so that the temperature change applied to the outer wall over a long period of time causes cracks in that portion. This is a problem because it is apt to occur, which may cause new peeling and the like.

Further, since the net is directly fastened by the head of the anchor and the washer, the head of the anchor and the washer are rubbed with the net by a long-term vibration applied to the building, and the stitch of the net is formed. It is thought that it may break and peel off.

Therefore, an object of the present invention is to prevent a new outer wall from cracking or peeling off by the anchor and washer for fixing the falling-off prevention net, or to prevent the net from breaking.

[0017]

In order to solve the above-mentioned problems, according to the present invention, the repair surface of the outer wall having been subjected to the base treatment is
Attach the required number of adhesive mat pieces with anchors, and attach the anti-stripping net that covers the repair surface to the adhesive mat pieces attached with the anchors with an adhesive, and support the repair surface with the adhesive mat pieces. The outer wall repairing method was performed by applying a finishing material to the stripping prevention net to form the outer wall surface.

At this time, an adhesive may be injected into the repair surface after the attachment of the anchor.

A stripping prevention net covering the repair surface is sandwiched by an adhesive mat piece attached to the repair surface by an anchor and a second adhesive mat piece placed on the mat piece. It is also possible to adhere with an adhesive.

Further, at this time, a wire may be stretched between the bonding mat pieces.

The above-mentioned adhesive also includes a filling putty having adhesiveness.

[0022]

[Function] In the outer wall repairing method using the exfoliation prevention net thus constructed, an adhesive mat piece is attached to the repaired surface of the outer wall which has been subjected to ground treatment such as repairing cracks and defects and cleaning the wall surface. It is supported by the body of the building by attaching it with an anchor. When installing this anchor,
The matte piece covers the repair surface to prevent damage to the repair surface due to anchor attachment.

At this time, the number of mat pieces attached to the wall surface is such that the weight of the finishing material or other repair material used for repairing is dispersed and supported.

Next, the matting pieces for adhesion and the exfoliation prevention net are adhered to each other with an adhesive, and the entire repair surface is covered with the net. Then, the mat and the net are integrated after the adhesive is cured, and the head of the anchor is covered by the net and the cured adhesive layer. For this reason, the anchor head is sandwiched between the mat piece and the net that are integrated by the adhesive,
Since it is not exposed to the net surface, even if the finishing material is applied to this net surface and the outer wall is formed, the anchor head does not directly contact the finishing material, and the applied finishing material is Because it is supported by a familiar net,
It is possible to make cracks less likely to occur.

Further, since the net is not directly fixed by the anchor, the anchor and the net do not directly rub against each other due to the vibration of the building, so that the net is not broken.

When the adhesive is injected into the repair surface after the attachment of the anchor, the float generated on the repair surface and the building body is prevented while preventing the co-floating by the anchor.
Repair with injected adhesive.

In the case where the stripping prevention net is attached to the repair surface by an anchor and the second bonding mat piece arranged on the matting mat piece is bonded in a sandwich shape, The support of the net can be strengthened.

Further, when the wire rod is stretched between the adhesive mat pieces, the wire rod increases the strength of the outer wall formed as an aggregate of the finishing material.

[0029]

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

In the outer wall repairing method using the exfoliation prevention net shown in the first embodiment of FIGS. 1 and 2, for example, the primer 1, the exfoliation prevention net 4, the filler 3, the anchor 7, the epoxy adhesive 11 are used. , The finishing material 9, and the matting piece 10 for bonding are used as equipment.

The primer 1 is used to stabilize the adhesive strength of the filler 3 by applying it to the base, and in selecting it, the adhesive strength is good, and an epoxy type or a spray gun which can be applied by a roller or a spray gun is used. A urethane type low viscosity type is preferable.

The stripping prevention net 4 is made by arranging glass fibers having high strength in an equilateral triangle shape at an angle of 60 degrees in the three axial directions,
The net 4, which has a size large enough to cover the repair surface 2 in which the intersections of the stitches are fixed by thermal processing, exhibits strong resistance to vertical, horizontal, and diagonal pulling. In this embodiment, the net 4 is made of glass fiber, but the net 4 is not limited to this. For example, the vinylon fiber described in the conventional example may be used. Also, the shape of the stitch is not limited to the equilateral triangle.

The filler (hereinafter referred to as an epoxy resin) 3 is, for example, an organic epoxy type or polyester type. In the inorganic type, it is excellent in adhesive strength, curing quality strength, waterproofness and elastic modulus such as filler, cation type, SBR type, water type epoxy type,
A lightweight material having a workable viscosity and a curing time is used. In this embodiment, an epoxy putty is used.

The anchor 7 is composed of an anchor body and an anchor pin that is inserted into the anchor body. When the anchor pin is tapped into the anchor body inserted into the mounting hole 6 and the anchor pin is driven to the tip, the anchor body Both ends open, and it is designed to bite into the hole wall against pulling force. In addition, the anchor body is provided with an injection hole in the periphery so that the adhesive can be injected into the hole from the head of the anchor body. The anchor 7 has a length that reaches at least the outer wall surface to the building frame 5.

Adhesive mat piece (hereinafter referred to as glass mat) 10
Is a non-woven fabric made by randomly dispersing short strands of glass fiber and adhering it with a polyester binder.It has no direction of strength, a high resin impregnation rate, and excellent corrosion resistance. Is arbitrarily determined according to the strength effect of the repair surface 2.

Next, using these used equipment, for example,
The case where the outer wall repairing method is applied to the old outer wall surface coated on the mortar finished surface will be described.

This repairing method consists of three steps, namely, surface treatment, construction, and finishing. The surface treatment is the same as in the conventional example.
Float of the mortar on the repaired surface 2 is investigated and diagnosed by percussion of the damaged area, and the floating area and the damaged area are scraped off. Also, if there is a part where the reinforcing bar explodes, scrape around the reinforcing bar and refill with epoxy resin. At the same time, work is carried out such as protruding the defective portion and repairing the concrete defect by performing pinning or the like according to the deteriorated portion.

The repaired surface 2 having been subjected to the base treatment in this way
After being washed with water using a high-pressure washing machine and dried, the outer wall is repaired with a stripping prevention net.

In this construction process, first, the anchor 7
For example, after marking about 4 places per square meter on the repair surface 2 so that a repair material for forming a new outer wall can be supported, the old coating film 1 at that portion
The keren of No. 2 is removed using a disc sander or the like to expose the mortar finished surface 13. By the way, at this time,
Even when the repaired surface 2 is exposed concrete, the surface is weakened and the same treatment is performed.

Next, in the same manner as the conventional anchor pinning, the exposed surface is subjected to the work steps of marking out, punching, and cleaning to punch the insertion hole 6 of the anchor 7. The state of the repair surface 2 on which the perforations have been made is shown in FIG.

The depth and the diameter of the insertion hole 6 of the anchor 7 depend on the length and the diameter of the anchor 7.

A glass mat 10 is applied to the perforated insertion hole 6, and a repair anchor 7 is inserted through the glass mat 10 through a washer 8 as shown in FIG. 3B. After anchoring the anchor pin of the inserted anchor 7 with a driving rod and fixing it to the skeleton 5, the epoxy adhesive 11 is prevented from co-floating with the anchor 7 at the floating interface of the skeleton 5 or in the insertion hole 6 from the head. After the injection, the primer 1 is applied to the entire repair surface 2 including the old coating film portion, and the epoxy resin 3 is further applied thereon. At this point, the glass mat 10 is fully impregnated with epoxy resin.

The epoxy resin 3 thus coated
Acts as an adhesive and together with the anchor 7 the mortar layer 1
The peeling prevention effect of 3 can be enhanced. Further, the washer 8, the glass mat 10 and the mortar layer 13 are integrated,
The entire surface of the old paint film can be coated, waterproofing, strengthening the base,
Increase the adhesive strength.

Next, as shown in FIG. 3 (c), a stripping prevention net 4 is attached to cover the entire repair surface 2 as shown in FIG. In this way, the bonded surfaces of the net 4 and the glass mats 10 that are stuck together are integrated and adhered as the resin 3 cures.

Further, the net 4 thus bonded has
After the epoxy resin 3 is applied and covered, a new outer wall surface is formed on the old wall surface by applying a finishing material 9 of mortar material or lysine material as a finishing process from the top as shown in FIG. 3 (d). To do.

The repair surface 2 repaired in this way is shown in FIG.
As shown in, since the entire surface is covered with the net 4 and the head of the anchor 7 is not exposed on the net 4,
It is well compatible with the finishing material 9, and the occurrence of cracks and peeling due to the breakage of the net 4 due to the exposed head of the anchor 7 and the washer 8 and the difference in thermal expansion coefficient between the finishing material 9 are reduced.

Furthermore, since the head of the anchor 7 is covered with the mat piece 10 and the net 4 and is molded and integrated with the epoxy resin adhesive 11, it is possible to prevent a change in temperature and Strong against moisture and protected from swelling changes and rust.

FIG. 5 shows a second embodiment. In this embodiment, the stripping prevention net 4 is sandwiched between the glass mat 10 fixed to the repair surface 2 by the anchor 7 and the second glass mat 10 'arranged on the mat 10 so as to be bonded. It is intended to increase the adhesive strength between the glass mats 10 and 10 'and the net 4 to improve the supporting force of the net 4.

A third embodiment is shown in FIGS. 6 and 7. In this embodiment, for example, when repairing the tip 20 of a veranda or the like, a wire rod 21 such as a copper wire, a stainless steel wire, a tetron wire, or a vinylon wire is provided between the glass mats 10 if necessary.
By stretching the wire material 21 above or below the net 4, the epoxy resin 3 and the mortar material are held by using the wire material 21 as an aggregate of the filler 3 and the finishing material 9 such as mortar to improve the effect of preventing peeling.

When the second glass mat 10 'is used as shown by the broken line in FIG. 7, the supporting force of the net 4 is further increased, and the effect of preventing peeling is further improved.

The repairing method using this wire rod 21 is not only applied to the tip 20 of the veranda or the like, but also to metal parts such as sashes, windows, around openings, projecting corners, entering corners, pipes, equipment attached to attachments, and copings. Surroundings, skirting boards, dirt floors, etc.
It is also suitable for use in a place where scaffolding is to be treated, etc. In the examples, the case where the repair surface 2 is mortar finish was described, but this repair method can be similarly applied to the case of tile finish.

[0052]

[Effect] According to the present invention, a conventional anchor and a stripping prevention net can be obtained by adhering the stripping prevention net and the adhesive mat piece anchored to the repair surface with an adhesive by the above-mentioned construction method. It has the features of the outer wall repairing method used, and furthermore, since the anchor head is not exposed from the net surface, it does not break the net and the newly formed outer wall It is possible to enhance the effect of reducing the occurrence of peeling and cracking.

Furthermore, since the adhesive matting piece and the anti-stripping net are integrated after curing of the adhesive, a high adhesive strength is obtained, and the anti-stripping effect is great.

Further, in the construction method in which the adhesive is injected into the repair surface after the attachment of the anchor, the floating can be repaired at the same time.

In the case where the stripping prevention net is sandwiched between the bonding mat piece and the second mat piece attached to the repair surface, the adhesive strength between the stripping prevention net and the mat piece is increased. The holding power of the net can be improved.

Further, in the method of providing the wire between the mat pieces, the strength of the newly formed outer wall can be improved.

[Brief description of drawings]

FIG. 1 is an operation diagram of the first embodiment.

FIG. 2 is a sectional view showing a construction example of the first embodiment.

FIG. 3 is an operation diagram of the first embodiment.

FIG. 4 is a front view showing a construction state of the first embodiment.

FIG. 5 is a sectional view showing a construction example of the second embodiment.

FIG. 6 is an operation diagram showing a construction example of the third embodiment.

FIG. 7 is a partial sectional perspective view of a third embodiment.

FIG. 8 is a sectional view showing a construction example of a conventional example.

[Explanation of symbols]

 1 Primer 2 Repair Surface 3 Epoxy Resin 4 Stripping Prevention Net 5 Concrete Frame 6 Anchor Insertion Hole 7 Anchor 8 Washer 9 Finishing Material 10 Glass Mat 10 'Second Glass Mat 11 Epoxy Adhesive 12 Old Coating 13 Mortar Layer 21 wire

Claims (4)

[Claims] 1. A peeling prevention net for covering the repair surface is attached to the repair surface of the outer wall that has been subjected to the base treatment by attaching a required number of adhesive mat pieces with an anchor, and to the adhesive mat piece attached with the anchor. An outer wall repairing method using an anti-stripping net that forms an outer wall by applying a finishing material to the anti-stripping net supported on the repair surface by an adhesive matting piece. 2. The outer wall repairing method using a peeling prevention net according to claim 1, wherein the adhesive mat piece is attached by an anchor and then an adhesive is injected into the repair surface. 3. A stripping prevention net covering the repair surface is sandwiched between an adhesive mat piece attached to the repair surface by an anchor and a second adhesive mat piece arranged on the mat piece, The outer wall repairing method using the exfoliation prevention net according to claim 1 or 2, wherein the outer wall repairing method is performed by using an adhesive. 4. A method for repairing an outer wall using a stripping prevention net according to claim 1, wherein a wire is stretched between the adhesive mat pieces.