JPH0722425Y2 - Deaeration insulation waterproof structure - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a deaeration heat insulating waterproof structure.

[Conventional technology]

2. Description of the Related Art Conventionally, a polymer sheet has been attached to a ground such as a roof of a building structure, a balcony, a floor and a corridor for waterproofing concrete or the like.

When performing the above waterproof construction, swelling may occur between the ground surface and the waterproof sheet due to moisture contained in the ground surface or air entrained when the waterproof sheet is laid, and this may diffuse and move along the interface in the width direction. Therefore, there is a problem that the sheet may peel off from the base surface.

Therefore, when pasting a waterproof sheet on the underlying surface, after confirming that the moisture contained in the underlying surface is dried to about 7% to 8%, the waterproof sheet should not be entrained by air. A work procedure such as sticking work is adopted.

Then, in order to prevent the entrapment of air when the sheet is attached, a concave groove such as a hexagonal shape is provided on the back surface of the sheet facing the base surface so that air can be discharged through the concave groove and a layer facing the base surface. It has been proposed to use as an air-permeable layer such as open cells, and to prevent entrainment of air through this air-permeable layer to prevent blistering and peeling due to this (for example, Japanese Patent Laid-Open No. 61-57754). .

[Problems of conventional technology]

However, it is practically difficult to determine whether the base surface has dried to a moisture content of 7% to 8%, and it may not be possible to wait until it reaches a dry state due to the construction period. Even a waterproof sheet having a groove for use has a problem that when it is bonded to a base surface, the adhesive is filled in the groove and the groove is buried, resulting in a lack of sufficient air discharging effect. In this case, when the adhesive used a volatile solvent, the solvent volatilizes from the adhesive itself, no matter how careful the surface of the substrate is dried, which is a cause of blistering.

In addition, in the case where the layer for the underlying surface is a breathable layer made of an open-cell foam, and the air is trapped through this breathable layer to discharge air, non-breathability is provided on the breathable layer for heat insulation and waterproofing. Since it is necessary to attach the closed-cell foam layer and the waterproof rubber sheet of the above, there is a risk of air entrapment at the interface between the non-air-permeable closed-cell foam layer and the waterproof rubber sheet. There was a problem that the prevention of peeling from the waterproof rubber sheet could not be achieved.

[Problems solved by the invention]

In view of the above problems, this device can be attached regardless of the dry state of the base surface or the type of adhesive,
The purpose of the present invention is to provide a deaerated heat-insulating waterproof structure that allows free discharge of air or the like that causes blistering even after laying construction and has a high heat insulating and waterproof effect.

[Technology for solving problems]

That is, the deaeration insulation waterproof structure of this invention is on the waterproof base surface,
A sheet made of a closed-cell foam in which a large number of through-holes penetrating in the thickness direction are formed in a uniformly dispersed state is attached, and a waterproof sheet is attached on the upper surface of the sheet through a layer having air permeability. It is characterized by

〔Example〕

Next, the deaeration insulation waterproof structure of this invention will be described with reference to examples.

FIG. 1 is a sectional view of an embodiment of the present invention, FIG. 2 is a sectional view of another embodiment, and FIG. 3 is a sectional view of yet another embodiment.

The degassing heat-insulating waterproof structure of the present invention has a plurality of through holes 2 ... 2 penetrating in the thickness direction (arrow X) on a base surface 1 made of concrete, cement mortar, etc. A sheet 3 made of foam is adhered via an adhesive agent, and a layer 4 made of, for example, a sheet made of open-celled foam, a nonwoven fabric or the like having air permeability on the sheet 3.
A waterproof sheet 5 made of a polymer such as rubber is adhered via the.

Reference numeral 6 in the drawing denotes a reinforcing layer which is embedded in the sheet 3 when necessary, and is embedded to prevent the sheet 3 from expanding when the sheet 3 is unfolded, laid and attached. is there.

In addition, in the above, the sheet 3, the breathable layer 4, and the waterproof sheet 5 are formed by sequentially stacking these sheets 3, 4 and 5 at the construction site, or by stacking the sheets 3, 4 and 5 integrally. It may be manufactured in advance and laid and adhered.

Further, when the deaeration heat-insulating waterproof structure of the present invention is implemented, in order to further improve the air discharging capability between the base surface, the third
A deaeration port 7 may be provided as shown.

[Action]

In this invention, since the sheet 3 in contact with the base surface is provided with a large number of through holes 2 ... 2 in a uniformly dispersed manner, air is trapped between the base surface during installation or after the installation,
Even if the water evaporates from the lower ground, it passes through the through holes 2 ... 2 to the gas permeable layer 4 on the upper surface thereof, is discharged to the outside through the gas permeable layer 4, and prevents peeling due to blistering.

Further, even when the uppermost waterproof sheet 5 is attached, since the lower layer is the breathable layer, even if air is mixed in, the sheet edge (not shown) or the deaeration port will pass through the breathable layer 4. 7
It is discharged from the outside (Fig. 3).

Further, since the sheet 3 is a layer made of closed-cell foam, it has good heat insulation.

By the way, after pouring concrete, a 20 mm thick closed-cell polyethylene sponge sheet that was foamed 30 times on the waterproof base surface 1 that had been cured for 2 days was provided with through holes of 1 mmφ in the thickness direction at intervals of 20 mm in length and width. The sheet 3 thus obtained is attached using an aqueous contact type adhesive, and the breathable layer 4 having open cells with a thickness of 2 mm is further adhered onto the sheet 3, and then an acrylic resin is used as a main component. A composite waterproof sheet having an adhesive layer was attached and a weather resistance test was conducted for 6 months, but no blistering occurred, and the temperature difference between the waterproof sheet 5 surface and the waterproof base surface was 20- It was as large as 40 ℃, and it was proved that the heat insulation effect was sufficient.

〔effect〕

As described above, according to the present invention, it is possible to reliably prevent blistering and peeling of the sheet due to air entrapment and the like even during or after the laying construction of the waterproof sheet, and further, the heat insulating effect is excellent. Have the effect of.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment of the present invention, FIG. 2 is a sectional view of another embodiment, and FIG. 3 is a sectional view of yet another embodiment.

Claims (2)

[Scope of utility model registration request] 1. A sheet made of a closed-cell foam in which a large number of through holes penetrating in the thickness direction are formed in a uniformly dispersed state on a waterproof substrate surface, and the top surface of the sheet is breathable. A deaeration heat-insulating waterproof structure, characterized in that a waterproof sheet is adhered through the layers that it has. 2. A degassing heat-insulating waterproofing according to claim 1, wherein the sheet made of the closed-cell foam has a reinforcing layer integrally embedded in the sheet made of the closed-cell foam. Construction.