JPH09228572A - Insulation and waterproofing method for concrete structures - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To provide a heat insulating and waterproofing method for a concrete structure which can be constructed in a relatively short time and which is highly reliable in waterproofing. SOLUTION: A heat insulating material 20 made of a closed-cell foam sheet is provided on a concrete surface 10 of a building, in which a concave groove 21 capable of exhibiting air permeability in the surface direction is provided, and the concave groove 21 is directed to the concrete surface. Is laid, a reinforcing material 30 made of a fiber sheet is laid thereon, a binder 31 made of a curable resin liquid is applied thereon, and the whole is covered with a waterproof sheet 40. The portion 41 is adhered to the concrete surface, and then a suction hole 50 is provided which penetrates only the waterproof sheet or penetrates the reinforcing material and the heat insulating material from the waterproof sheet, and the exhaust pipe 51 is attached to this suction hole. After the binder 31 is sufficiently impregnated into the reinforcing material 30 by sucking and removing the air present inside the tube, the binder 31 is cured.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat insulating and waterproofing method for concrete structures.

[0002]

2. Description of the Related Art Concrete structures, such as concrete on the rooftop of a building, often crack and cause rain leaks. To prevent rain leaks, a waterproof layer is provided on the concrete surface, and in order to improve heat insulation. An insulation layer is provided under the waterproof layer. Further, it has been proposed to attach a ventilation pipe from the heat insulating material layer to the outer side of the waterproof layer in order to prevent the waterproof layer from bulging due to internal moisture (see Japanese Patent Laid-Open No. 3-93953).

Further, in order to increase the strength and improve the reliability of waterproofing, a rubber asphalt sheet having a non-woven fabric attached to the surface thereof is provided on the concrete surface, and a fiber reinforced resin (FRP) is prepared by a hand lay-up method thereon. A method of forming a composite waterproof layer by providing a reinforcing layer composed of (1) is also proposed (see Japanese Patent Laid-Open No. 4-155052).

[0004]

However, of the above proposed methods, the former method is not strong enough, and cracks may occur in the waterproof layer, resulting in poor reliability of waterproofing. In the latter method, the curable resin liquid is not sufficiently impregnated into the fiber reinforcing material unless the curable resin liquid is applied to the fiber reinforcing material and the surface is repeatedly pressed with a roller.
There is a problem in that the impregnation work with the rollers takes time.

The present invention solves the above problems, and an object of the present invention is to provide a heat insulating and waterproofing method for a concrete structure which can be constructed in a relatively short time and has high reliability of waterproofing. is there.

[0006]

SUMMARY OF THE INVENTION A heat insulating and waterproofing method for a concrete building according to the present invention comprises a closed cell foam sheet which is formed on the concrete surface of the building so as to have air permeability in the surface direction. The material is laid with the side that can express air permeability facing the concrete surface, the reinforcing material made of fiber sheet is laid on top of it, and the binder made of curable resin liquid is applied on top of it, and the whole is waterproofed from above. It is characterized by covering with a sheet, adhering the entire peripheral edge of this waterproof sheet to a concrete surface, then providing a suction hole in the waterproof sheet, and removing air present inside from this suction hole to cure the binder. With the above, the above-mentioned object can be achieved.

The construction method of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a partially cutaway perspective view showing an embodiment of the present invention. FIG. 2 is a partially cutaway perspective view showing another embodiment of the present invention.

In FIGS. 1 and 2, reference numeral 10 denotes a concrete surface such as a rooftop of a building.
A heat insulating material 20 made of a closed-cell foam sheet is laid.
As the closed-cell foam sheet, a foam sheet having excellent solvent resistance such as a polyolefin resin foam sheet or a hard polyurethane resin foam sheet is preferably used. When an open-cell foam sheet is used, a binder made of a curable resin liquid to be applied later enters the inside of the cells and is cured, so that the heat insulating property is deteriorated.

The closed-cell foam sheet may include, for example,
The grid-shaped concave grooves 21 are formed in the surface direction so that when laid on a concrete surface, air permeability can be exhibited in the surface direction. The groove 21 is not limited to a lattice shape, but may be grooves parallel to each other, or may be a concavo-convex structure including a large number of independent protrusions and recesses communicating with the protrusions.

Further, a fiber sheet made of a woven fabric, a non-woven fabric or a net may be attached to the closed-cell foam sheet, and the woven fabric, the non-woven fabric or the net of the net may give air permeability in the plane direction. .

The concave groove 21 and the like are provided on at least one surface of the closed-cell foam sheet by a known embossing roll method or a mold foam molding method. And the heat insulating material 2
No. 0 lays the breathable concave groove 21 toward the concrete surface 10. At this time, it is preferable to bond the concrete surface 10 and the heat insulating material 20 with an adhesive. In this case, a chloroprene adhesive is generally used for bonding the polyolefin resin foam sheet, and an asphalt adhesive is generally used for the hard polyurethane resin foam sheet. Although the thickness of the heat insulating material 20 varies depending on the environmental temperature, it is generally preferable to use the heat insulating material having a thickness of 10 to 70 mm.

Next, a reinforcing material 30 made of a fiber sheet is laid on the heat insulating material 20. As a fiber sheet,
Woven or non-woven fabrics and nets made of high-strength inorganic fibers such as glass fibers and carbon fibers and high-strength organic fibers such as polyester fibers and nylon fibers are used. In particular, glass fiber mats such as chopped strand mats and continuous strand mats are preferably used from the viewpoint of reinforcing effect and price. The fiber sheet is 500 to 1000 g / m ² from the viewpoint of reinforcement hardening and binder impregnation.
It is preferred to use

Then, a binder 31 made of a curable resin liquid is applied onto the reinforcing material 30 using an applicator. As the curable resin liquid, an unsaturated polyester resin liquid containing a curing agent, a thermosetting resin liquid such as an epoxy resin or a vinyl ester resin is used. As the curing agent, a room temperature curing type is used for curing outdoors, and for unsaturated polyester resin, bisbutylcyclohexyl peroxydicarbonate, methyl isobutyl ketone peroxide, lauryl peroxide, cyclohexanone peroxide, benzoyl. A peroxide is used and an amine curing agent is used for the epoxy resin.

After applying the binder 31 with the applicator, the binder 31 may be lightly stretched with a roller attached to the applicator, and here, like the conventional method, its surface is repeatedly repeated with the roller. It is not necessary to press and impregnate the reinforcing material 30. The binder 31 is
The reinforcing material 30 should be 50 to 80% by weight, for example, 5
It is preferable to apply in the range of 00 to 2000 g / m ² .

Further, a waterproof sheet 40 is entirely covered on the reinforcing material 30 coated with the binder 31, and the entire peripheral edge portion 41 of the waterproof sheet 40 is bonded to the concrete surface 10. As the waterproof sheet 40, a rubber-based or soft vinyl chloride resin-based waterproof sheet is used, and specifically, a shut sheet manufactured by Kuraray Co., Ltd., a Sunloid DN sheet manufactured by Tsutsunaka Sheet Waterproof Co., Ltd., Toyo Tire & Rubber Co., Ltd. Examples include Toyo Sheet Extract Era Co., Ltd. and Neo Roofing manufactured by Sansei Belt Co., Ltd. On the back surface of the waterproof sheet 40, it is preferable to coat a reinforcing material 30 (FRP) reinforced with a binder 31 with an undercoat layer having good adhesiveness.

The waterproof sheet 40 is usually a roll, which is spread on the concrete surface at the beginning of construction.
The area of the concrete surface 10 to be waterproofed is joined with an adhesive, and this is rolled up in advance and brought close to one corner of the concrete surface 10. Then, while rewinding the waterproof sheet 40 from this scroll, the entire reinforcing material 30 is covered with the waterproof sheet 40.

In this case, as shown in FIG.
The reinforcing agent 30 may be made slightly narrower than the width of the waterproof sheet 40 so that the entire peripheral edge portion 41 of the waterproof sheet 40 is in contact with the concrete surface 10. It may be provided with the same width as the above, and the peripheral edge portion 41 of the waterproof sheet 40 may be provided so as to contact the vertical surface 11 of concrete. Further, as shown in FIG. 2, the waterproof sheet 40, the heat insulating material 20, and the reinforcing agent 30.
From the concrete surface 10 to the concrete vertical surface 11
May be provided so that the peripheral edge portion 41 of the waterproof sheet 40 contacts the vertical surface 11 of the concrete.

Then, the entire peripheral edge portion 4 of the waterproof sheet 40.
1 is adhered to the concrete surface 10 with an adhesive and hermetically sealed. As the adhesive, for example, an epoxy-based adhesive,
Rubber-based adhesives such as polyurethane-based, styrene-butadiene rubber, neoprene rubber and nitrile rubber are used.

Thereafter, suction holes 50 are provided at one or a plurality of locations of the waterproof sheet 40 by using a tool such as a cylindrical blade. Although the suction holes 50 may be provided so as to penetrate only the waterproof sheet 40, the waterproof sheet 40 to the reinforcing layer 30 may be provided.
And is preferably provided so as to penetrate the heat insulating layer 20. The small piece of the waterproof sheet 40 or the small piece of the waterproof sheet 40, the reinforcing layer 30, and the heat insulating layer 20 in the portion of the suction hole 50 is removed. The exhaust pipe 51 is inserted into the suction hole 50 thus formed, and the periphery thereof is hermetically sealed with a caulking agent.

Finally, the tip of the exhaust pipe 51 is connected to a suction pump or a suction blower, and the air existing inside is sucked and removed from the suction hole 50 through the exhaust pipe 51. Since the heat insulating material 20 is provided with the gas permeable groove 21, the air inside is satisfactorily discharged to the outside from the suction hole 50 and the exhaust pipe 51 through the gas permeable groove 21.

The inside of the waterproof sheet 4 is depressurized by sucking and removing the air existing inside from the suction holes 50.
0 is uniformly applied with pressure from the outside to the waterproof sheet 40 as a whole and is uniformly pressed by the reinforcing material 30. As a result, the binder 31 applied to the reinforcing material 30 is dispersed in the reinforcing material 30. It is fully impregnated. afterwards,
The binder 31 is hardened and the fibers of the reinforcing material 30 are firmly bonded to each other to form a fiber-reinforced layer.

After the construction, the exhaust pipe 51 has the suction hole 5
It is used in a state where it is attached to 0, and moisture generated from concrete after construction is satisfactorily discharged to the outside from the suction hole 50 and the exhaust pipe 51 through the air-permeable concave groove 21. Therefore, it is possible to prevent a situation in which air or moisture is accumulated inside and the waterproof sheet 40 swells.

It should be noted that, after the construction, the exhaust pipe 51 has a structure shown in FIG.
As shown in, an umbrella-shaped cover is attached to the tip of the exhaust pipe 51 so that rainwater does not enter the inside from the exhaust pipe 51. Further, instead of attaching an umbrella-shaped cover, as shown in FIG. 2, an exhaust pipe 51 whose tip is bent downward may be attached to prevent rainwater from entering the inside.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples and comparative examples of the present invention will be described below. Example 1 A concrete building was heat-insulated and waterproofed by the construction method shown in FIG. Concrete surface (10m x 10m) on the roof of the building 1
Spread a 1.2 mm thick waterproof sheet (Neo roofing made by Sansei Belt Co., Ltd.) to 0, and join it with an adhesive (Neobond # 110JS made by Sansei Belt Co., Ltd.) to measure 10 m ×
A waterproof sheet 40 having a length of 10 m is produced, which is wound in a roll shape in advance and brought close to one corner of the concrete surface 10.

Next, as a heat insulating material 20, a grid-like air-permeable concave groove (width 2 mm × depth 2 mm × pitch 100 mm) 2 is provided on one side.
Using a cross-linked polyethylene / polypropylene mixed resin foam sheet (thickness: 25 mm) provided with 1
The air-permeable concave groove 21 was directed toward the concrete surface 10 and bonded to the concrete surface 10 with an adhesive (Esdyne # 7850 manufactured by Sekisui Chemical Co., Ltd.). The size of this heat insulating material 20 is 9.6, leaving 200 mm of the entire peripheral edge of the concrete surface 10.
It was set to m × 9.6 m.

Next, a chopped strand glass mat (380 g / m ² ) having the same dimensions as the heat insulating material 20 (380 g / m ² ) (MC38 manufactured by Nitto Boseki Co., Ltd.) was used as the reinforcing material 30 on the heat insulating material 20.
0) is laid in two layers (total of 760 g / m ² ), and 100 parts by weight of an unsaturated polyester resin and a room temperature curing agent (Perkadox 1 manufactured by Kayaku Akzo Co., Ltd.) are used as a binder 31 thereon.
6) 1 part by weight of the curable resin liquid was applied at a rate of 1800 g / m ² using an applicator.

Further, the reinforcing material 30 coated with the binder 31 is entirely covered with a waterproof sheet 40 which is placed near one corner of the concrete surface 10, and the entire peripheral edge portion 41 of the waterproof sheet 40 is bonded with an adhesive (three It was bonded to the concrete surface 10 using Neobond F) manufactured by Star Belt Co., Ltd. further,
1m in diameter 2m inside from concrete surface 10
The 00 mm suction hole 50 is formed from the waterproof sheet 40 to the reinforcement layer 30.
And the suction hole 50.
An exhaust pipe 51 made of stainless steel and having a diameter of 100 mm was inserted in, and the periphery of the pipe was airtightly sealed with a caulking agent.

Finally, the tip of the exhaust pipe 51 was connected to a suction pump, suction was continued for 1 hour, and the air present inside was sucked and removed from the suction hole 50 through the exhaust pipe 51. By this suction operation, the waterproof sheet 40 is uniformly pressed by the reinforcing material 30 coated with the binder 31 as a whole, and the binder 31 coated on the reinforcing material 30 is repelled by the reinforcing material 30.
It was cured while being well impregnated in. After that, an umbrella-shaped cover was attached to the tip of the exhaust pipe 51.

The above construction method is a total of 6.
It took an hour. In particular, the operation of applying the binder 31 using the applicator was 0.2 hours. Further, the suction by the suction pump required one hour.

Comparative Example 1 In Example 1, after the binder 31 was applied, the surface of the binder 31 was repeatedly pressed with a roller to make the fibers of the reinforcing material 30 sufficiently impregnated with the binder 31. In this case, the suction hole 50 and the exhaust pipe 51 were provided, but the suction operation from the exhaust pipe 51 by the suction pump was not performed. Other than that, it carried out similarly to Example 1.

The above construction method is a total of 9.
It took 4 hours. In particular, the operation of applying the binder 31 took 0.2 hours, but after that, the binder 31 must be repeatedly pressed with a roller many times to sufficiently impregnate the reinforcing material 30 made of a fiber sheet with the binder 31. However, 3.3 hours were required for this roller pressing operation.

[0032]

As described above, the heat insulating and waterproofing method for the concrete structure of the present invention is provided on the concrete surface of the structure.
Insulating material consisting of closed-cell foam sheet made to be able to express air permeability in the surface direction is laid with the air permeability expression side facing the concrete surface, and reinforcing material made of fiber sheet is laid on it. , Apply a binder made of curable resin liquid on it, and cover the whole with a waterproof sheet from above,
Adhere the entire peripheral edge of this tarpaulin to the concrete surface,
After that, a suction hole is provided in the waterproof sheet, and the air existing inside is sucked and removed from this suction hole to cure the binder. Particularly, the air existing inside is sucked and removed from the suction hole to reinforce the fiber sheet. The material can be satisfactorily impregnated with a binder made of a curable resin liquid.

Further, according to the method of the present invention, by using the heat insulating material made of the closed-cell foam sheet and the reinforcing material made of the fiber sheet together, a high heat insulating property is obtained and the waterproof layer is reinforced so that the waterproof layer is formed. The reliability of is improved.
Moreover, after applying a binder made of a curable resin solution, it is not necessary to repeatedly impregnate the surface of the binder with a roller many times to sufficiently impregnate the reinforcing material made of a fiber sheet, as in the conventional method. As a result, the time required for the construction method is shortened and there is an advantage that construction can be performed in a relatively short time.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view showing an embodiment of the present invention.

FIG. 2 is a partially cutaway perspective view showing another embodiment of the present invention.

[Explanation of symbols]

 10 Concrete Surface 20 Heat Insulating Material 21 Lattice-Shaped Grooves 30 Reinforcing Material 31 Binder 40 Waterproof Sheet 50 Suction Hole 51 Exhaust Pipe

Claims (1)

[Claims] 1. A heat insulating material composed of a closed-cell foam sheet adapted to exhibit air permeability in a plane direction is laid on a concrete surface of a building with the side capable of exhibiting air permeability facing the concrete surface. Laying a reinforcing material made of fiber sheet on it, applying a binder made of curable resin liquid on it, covering the whole with a waterproof sheet, and bonding the entire peripheral edge of this waterproof sheet to the concrete surface Then, the waterproof sheet is provided with a suction hole, and the air existing inside is sucked and removed from the suction hole to cure the binder, which is a heat insulating and waterproofing method for a concrete building.