JPH0241618B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a heat insulating and waterproof construction method that can detect pinholes in waterproof sheets in concrete structures such as flat roofs and heat storage tanks.

Conventionally, as shown in FIG. 5, for example, in order to insulate and waterproof a concrete building 21 such as a flat roof, a heat insulating material 22 is first applied to the surface of a reinforced concrete wall 21a in the portion of the flat roof 21 to be insulated and waterproofed. These heat insulating materials 22 are fixed using the joint pieces 25 and fixing fittings 26, and then the heat insulating materials 2
2 was covered with a waterproof sheet 23, and a required portion 23a of the waterproof sheet 23 was joined to the joining piece 25. However, in such a heat insulation waterproofing construction method, since the heat insulating material 22 as an electrical insulator is interposed between the waterproof sheet 23 and the concrete wall 21a,
Pinholes that occur in the tarpaulin sheet 23 during construction or during use after construction cannot be detected, and therefore, if such pinholes are found in the tarpaulin sheet 23, the intended waterproofing and insulation effects may not be achieved. There was a problem that I could not get it.

By the way, conventional waterproofing methods (particularly (see Japanese Patent Publication No. 1982-201042) is already known, but in this conventional method, a waterproof sheet made of insulating rubber is coated with conductive materials such as carbon black or iron powder, glue,
The waterproof sheet is not easy to manufacture because it uses a linear mixture of surfactant and surfactant and has linear conductive parts on the surface of the waterproof sheet. Therefore, the elasticity of the waterproof sheet is poor, and the linear conductive part cannot follow the expansion and contraction of the rubber material due to heating and cooling phenomena caused by climate changes, solar irradiation, and nighttime radiation cooling, and the linear conductive part itself has the disadvantage of being prone to cracks, and if cracks occur in the linear conductive part itself,
For example, even though the tarpaulin is sound,
There was a problem that the electric resistance value increased and malfunctions were likely to occur. Even if this is not the case, the conductive parts are arranged linearly on the surface of the tarpaulin sheet, so if there is a pinhole in the part of the tarpaulin sheet that does not have a linear conductive part, it will be detected. The problem was that I couldn't do it.

Purpose of the Invention The purpose of the present invention is to solve the above-mentioned problems, to easily perform insulation and waterproofing of concrete buildings such as flat roofs with high workability, and to prevent pins occurring in the waterproof sheet after construction. To provide a heat insulating waterproof construction method capable of detecting pinholes in a tarpaulin sheet, which can easily and reliably detect holes and reliably achieve heat insulating and waterproofing of concrete buildings.

Composition of the Invention In order to achieve the above object, the present invention lays out heat insulating panels on the surface of a concrete wall in a part of a concrete building that should be insulated and waterproof, and attaches required parts of the insulating panels to joint pieces and fixing metal fittings. In the insulation and waterproof construction method for concrete buildings, the insulation panel is fixed to a concrete wall, and then the entire surface of the insulation panel is covered with a waterproof sheet, and the required part of the waterproof sheet is joined to the surface of the joint piece. A conductive sheet made of a conductor and a reinforcing material lined with the conductor and having approximately the same shape and size as the heat insulating material is placed on the surface of the heat insulating material having the required size.
The gist of this paper is a heat-insulating waterproof construction method that can detect pinholes in waterproof sheets in concrete buildings, which is characterized by using conductive heat-insulating panels bonded so that the conductor is on the outside.

In the above, examples of the heat insulating material of the conductive heat insulating panel include polystyrene, polyvinyl chloride,
Foams of polyurethane, polyethylene resin, glass wool, etc. are used, and polystyrene foams are particularly preferred because they are inexpensive.

The thickness of the insulation varies depending on the case, but is usually about 25 to 100 mm.

The conductor of the conductive sheet is composed of a metal foil such as aluminum foil, and a metal vapor deposition layer of aluminum, copper, etc. provided on the surface of a synthetic resin film such as polyester resin. When using metal foil as the conductor, its thickness is usually about 5 to 30 μm.

Further, the conductor may be composed of a nonwoven fabric made of conductive fibers alone or a mixture of conductive fibers and thermoplastic fibers having a low softening point.

Here, as the conductive fibers, copper-adsorbing fibers, metal-plated fibers, carbon composite fibers, metal-deposited fibers, thin metal wires, etc. are used. Further, as the thermoplastic fiber with a low softening point, acrylic fiber, polyvinyl chloride fiber, polyolefin fiber, nylon fiber, polyester fiber, etc. are used. For example, the conductive fiber is about 3~
Use at a rate of 200g/ ^m2 . Of course, the above numerical values are not limiting.

Note that if the conductor is made of metal foil such as aluminum and has high conductivity, there is no need to ground the conductor, but if the conductor has low conductivity, it is necessary to ground the conductor. be.

Further, as the reinforcing material to be lined with the conductor, a synthetic resin film, a woven fabric or non-woven fabric of synthetic fibers, or the like is used.

A conductive sheet made of the conductor and a reinforcing material lined therewith and having substantially the same shape and size as the heat insulator is bonded to the surface of the heat insulating material, with the conductor facing outward.

As the adhesive for bonding the heat insulating material and the conductive sheet, epoxy adhesives, urethane adhesives, rubber adhesives, and the like can be used. Although it is preferable to bond the entire surface with the above-mentioned adhesive, in some cases, only the peripheral portion and other necessary portions may be bonded.

In the above, the waterproof sheet used is a sheet made of thermoplastic synthetic resin such as soft polyvinyl chloride, polyethylene, or polypropylene, or a sheet made of non-vulcanized rubber or rubber asphalt. Preferably, flexible polyvinyl chloride sheets are used. The thickness of this waterproof sheet is usually about 1.0 to 2.0 mm.

As the joining piece, a hard or semi-hard synthetic resin plate, a metal plate, a steel plate coated on both sides with vinyl chloride resin, or the like is used.

As fixing hardware, use nails, curl plugs, etc.

Epoxy-based, urethane-based, or rubber-based adhesives are used to bond the waterproof sheet and the joint piece, but if both the joint piece and the waterproof sheet are made of the same resin such as vinyl chloride resin, ,
It is preferable to use tetrahydrofuran alone or a solvent-based adhesive prepared by dissolving a small amount of vinyl chloride resin in tetrahydrofuran, since this produces a highly durable adhesive effect.

Embodiments Next, embodiments of the present invention will be described with reference to the drawings.

Embodiment 1 FIGS. 1 to 3 show a case where the insulation and waterproof construction method of the present invention is applied to a flat roof 10.

For example, a conductive sheet 4 of the same shape and size is coated with an epoxy adhesive 1 on the entire surface of a Styrofoam heat insulating material 2 having a width of 1 m and a length of 2 m.
2 to form a conductive heat insulating panel 1.
was manufactured in advance.

Here, as shown in FIG. 2, the conductive sheet 4 is made by laminating and integrating an aluminum foil 7 with a thickness of 7 μm, a woven polyethylene fiber fabric 8 as a reinforcing material, and a polyethylene resin foam 9. I used something.

The upper conductive insulation panels 1 are laid out on the surface of the concrete wall 10a at the bottom of the flat roof 10 that is to be insulated and waterproofed, and the required portions 1a of the panels 1 are attached to the concrete wall using joint pieces 5 made of PVC steel plates and spread nails 6. It was fixed at 10a. In this case, the conductor 7 of the conductive sheet 4 of the panel 1 is grounded to the reinforced concrete wall 10a by the spread nails 6.

Next, the entire surface of the conductor 7 of the conductive sheet 4 of the panel 1 is covered with a waterproof sheet 3 made of soft polyvinyl chloride resin, and the required portions 3a of the waterproof sheet 3 are covered.
was bonded to the surface of the bonded piece 5.

Here, a solvent-based adhesive made of tetrahydrofuran was used as the adhesive. In addition, the joint piece 5b has a cross section of approximately L at the peripheral edge and corners of the flat roof 1.
The joint pieces 5a, 5 in the form of strips were used, and the circular joint piece 5c was used in the other intermediate portion. Note that as the connecting piece 5c at the intermediate portion, other square or flat strip-shaped pieces may be used. In the case of a flat roof 10, it is desirable to join the waterproof sheet 3 to all of these joining pieces. In addition, the end portion of the waterproof sheet 3 is a rising wall 10 around the flat roof 10.
It extended to near the upper edge of b and was joined to the joining piece 5a.

After completing the insulation and waterproofing work for the flat roof 10 as described above, the surface waterproof sheet 3 may be damaged during related work such as scaffolding dismantling work and equipment piping work, so after all work is completed, Check the entire surface with a flaw detector. That is, the tip inspection brush of the flaw detector is placed on the surface of the waterproof sheet 3 on the conductive heat insulating panel 1, and a predetermined high voltage is applied to it. Then, if there is no scratch on the tarpaulin sheet 3, no discharge phenomenon will occur, but if there is a scratch on the tarpaulin sheet 3, the inspection brush and the conductive sheet 4 of the panel 1 will be damaged.
A discharge phenomenon occurs between the waterproof sheet 3 and the conductor 7, sparks of discharge are generated, the detection buzzer of the flaw detector sounds, and the damaged portion of the waterproof sheet 3 is scorched by the discharge. This allows the location of the damaged part to be easily located. After checking, if there is a damaged part of the waterproof sheet 3, it is repaired as appropriate by, for example, covering and pasting a piece of waterproof sheet of a required size over the damaged part.

Note that such flaw detection work should be carried out not only immediately after the insulation and waterproofing construction of the flat roof 10 but also after a certain period of time has elapsed to detect pins of the waterproof sheet 3 that may have occurred later during cleaning of the flat roof 10 or other work. Holes can be detected easily as well, and maintenance of flat roofs and the like is easy.

Embodiment 2 FIGS. 4 and 5 show a case where the heat insulation waterproof construction method of the present invention is applied to a heat storage tank 11.

Example 1 above for foamed polystyrene insulation material 2
The same conductive sheets 4 as in the case were joined and integrated with an adhesive 12 to prepare a conductive heat insulating panel 1 having a required size in advance.

Then, the conductive heat insulating panels 1 are laid out on the bottom and side concrete walls 11a and 11b of the heat storage tank 11 to be insulated and waterproofed, and the required portions 1a of the panels 1 are connected to the concrete wall 11a with the joint pieces 5 and the split nails 6. , 11b. Next, a waterproof sheet 3 was placed over the entire surface of the conductive heat insulating panel 1, and a required portion 3a of the waterproof sheet 3 was bonded to the surface of the bonding piece 5 using a solvent-based adhesive made of tetrahydrofuran. As in the case of Example 1, the joining pieces 5a and 5b having an L-shaped cross section and the circular joining piece 5c were used. In the case of the heat storage tank 11, hot water, etc. is stored inside the tank, and pressure is always applied to the waterproof sheet 3 due to this hot water, etc. Therefore, the waterproof sheet 3 has at least its end portions and corner portions connected to the joining pieces 5a, 5b. The intermediate portion only needs to be appropriately joined to the joining piece 5c.

Effects of the Invention As described above, the present invention lays out heat insulating panels on the concrete walls 10a, 11a, 11b of the concrete buildings 10, 11 in areas to be insulated and waterproof, and connects required parts of the insulating panels with the joint pieces 5 and 11b. Concrete walls 10a, 11 by fixing fittings 6
a, 11b, then cover the entire surface of the insulation panel with a waterproof sheet 3, and join the required portion 3a of the waterproof sheet 3 to the surface of the joint piece 5. Insulating material 2 with the required size as a panel
A conductive sheet 4 made of a conductor 7 and reinforcing materials 8 and 9 lined with the conductor 7 and having approximately the same shape and size as the heat insulating material 2 is bonded to the surface of the conductor 7 with the conductor 7 on the outside. The conductive sheet 4 bonded to the heat insulating material 2 consists of a conductor 7 and reinforcing materials 8 and 9 lined with the conductor 7, so its shape and dimensions are very small. It is stable and easy to handle, so when joining the conductive sheet 4 to the heat insulating material 2, workability is good and the production of the conductive heat insulating panel 2 is simple. In this way, since the conductive heat insulating panel 1 in which the heat insulating material 2 and the conductive sheet 4 are integrated is used, it is possible to insulate and waterproof concrete structures 10 and 11 such as flat roofs and heat storage tanks at the site. concrete walls 10a, 11a, 1
1b, the conductive heat insulating panels 1 are laid out and fixed, and then the waterproof sheet 3 is stretched over the entire surface of the panels 1, so the concrete building 10,
11 insulation and waterproofing construction can be carried out very easily. Then, immediately after the insulation and waterproofing construction, or not only immediately after the insulation and waterproofing construction but also after a predetermined period of time has elapsed, pinholes that have formed on the waterproofing sheet 3 on the conductive insulation panel 1 are detected over the entire surface of the waterproofing sheet 3 using a flaw detector. Since pinholes can be detected extremely easily and reliably, and parts of the waterproof sheet where pinholes have occurred can be appropriately repaired, insulation and waterproofing of the concrete structures 10 and 11 can be reliably achieved. , maintenance and management of the concrete structures 10 and 11 is extremely easy. Moreover, since the conductive sheet 4 equipped with the conductor 7 is attached to the side of the heat insulating material 2, which has less elasticity than the waterproof sheet 3, and the conductor 7 is lined with reinforcing materials 8 and 9, changes in the climate can be avoided. Furthermore, the conductor 7 is hard to be broken even by heating and cooling phenomena caused by solar irradiation, nighttime radiation cooling, etc., and pinholes in the waterproof sheet 3 can always be detected reliably.

[Brief explanation of the drawing]

Fig. 1 is a partial vertical sectional view of a flat roof that has been insulated and waterproofed using the method of the present invention, Fig. 2 is an enlarged sectional view of the main part of Fig. 1, and Fig. 3 is an enlarged plan view of the same part. FIG. 5 is a partial vertical sectional view of a heat storage tank that has been thermally insulated and waterproofed using the method of the present invention, and FIG. 5 is a partial vertical sectional view of a flat roof that has been thermally insulated and waterproofed using the conventional method. 1... Conductive heat insulation panel, 2... Heat insulation material, 3...
... Waterproof sheet, 4 ... Conductive sheet, 5, 5a,
5b, 5c...Joining piece, 6...Spread nail (fixing metal fitting), 7...Conductor, 8, 9...Reinforcement material, 10...
... Flat roof (concrete building), 11 ... Heat storage tank (concrete building), 10a, 11a, 1
1b... Concrete wall, 12... Adhesive.

Claims (1)

[Claims] 1 Concrete walls 10a, 11a, 11 in parts of concrete buildings 10, 11 that should be insulated and waterproofed
The heat insulating panels are laid out on the surface of b, the required parts of the insulating panels are fixed to the concrete walls 10a, 11a, 11b with the joint pieces 5 and fixing fittings 6, and then the waterproof sheet 3 is placed over the entire surface of the heat insulating panels.
In the insulation and waterproof construction method for concrete buildings in which the required portion 3a of the waterproof sheet 3 is bonded to the surface of the joint piece 5 by covering it with
A conductive sheet 4 consisting of a conductor 7 and reinforcing materials 8 and 9 lined therewith and having approximately the same shape and size as the heat insulating material 2 is placed on the surface of the heat insulating material 2 having the required size.
A method of insulating and waterproofing construction in which pinholes in a waterproof sheet in a concrete building can be detected, characterized by using a conductive heat insulating panel 2 which is bonded with the conductor 7 on the outside.