JPS60258359A - Expansion preventing water-proof method - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a waterproofing method for preventing sheet blistering in a sheet waterproofing method.

BACKGROUND ART Asphalt sealing and sheet waterproofing methods that use waterproof sheets such as asphalt sheets are common methods for waterproofing roof slab surfaces of buildings. This waterproofing method is either a thermal method in which a primer is applied to the underlying concrete surface of the rooftop and a sheet is pasted, or a cold method is applied in which an adhesive is applied to the entire surface of the notebook and adhesive is applied to the underlying surface. It is being

However, this base concrete surface retains some amount of water even if it is made of RC slab or lightweight foam concrete slab, as well as a poured concrete surface. Moreover, if construction is carried out in winter in a particularly cold region, there will be a lot of moisture in it due to the temperature, and if the concrete is completely pasted to form a waterproof layer in such conditions, it will be difficult to prevent the water from rising when the temperature rises in the summer. The water contained becomes water vapor and evaporates. Water vapor is emitted in this way, and when it becomes large enough, the attached waterproof layer peels off and floats due to the water vapor pressure, causing the so-called "blister" phenomenon.Moreover, the water vapor contracts due to the cooling of the night and the warm air during the day. Repeated expansion causes the water layer to become brittle, destroying the waterproof layer and causing water leakage. and,
Destruction of the waterproof layer due to this blistering phenomenon is more common in cold regions with large temperature differences, and it is currently difficult to find countermeasures against this phenomenon. Major construction work is generally performed, such as cutting the waterproof layer to remove accumulated water, peeling off the peeled waterproof layer, and reattaching the waterproof layer.

The method of the present invention provides a waterproofing method that does not cause such blistering phenomenon in the sheet waterproofing method. A waterproof layer is created by applying an epoxy room-temperature-curing adhesive to the coating surface in a dot pattern on small areas at appropriate intervals without applying it all over the surface, and pasting a waterproof sheet on this surface. A bonded area and an unbonded area are formed between the surface of the waterproof layer and the base concrete, and this unbonded area is used as a ventilation path to disperse and release the water vapor generated from this to the sides, and finally to the outside air from the side edge of the waterproof layer. 2. The waterproofing method of the present invention will be explained with reference to the attached drawings. 2. Figure 1 shows the water before pasting the waterproof sheet to form the waterproof layer. It is a perspective view of the concrete surface G (substrate concrete)
A two-component solvent type epoxy primer (2) is applied to the - side, and an epoxy room-temperature curing adhesive (3) is applied to the primer-coated surface without applying it to the - side. Dotsuki is applied to small areas at appropriate intervals.

In this figure, the adhesive is applied in a circular shape, but this shape can be arbitrary and can be triangular or square, but it is better to have a constant shape so that the engraving can be cut out. Easy to use and efficient in work. In the case of a circular shape as shown in the figure, the area to be dotted should be about 20 crn in diameter, and 5 to 6 spots per 1 inch is appropriate.

The primer used in the present invention is a two-component solvent type epoxy primer consisting of a resin and a hardening agent. 1), dot the adhesive by heating the surface and the sheet surface with a burner, and as shown in Figure 2, the waterproof No. 11 layer and the F/Ij-1-G surface are bonded. The portion bonded with the agent (3) and the unbonded space (4) are formed as a ventilation path.

Even when the waterproof sheet (1) is applied over the entire surface, these unbonded spaces (4) communicate with each other to form a series of ventilation paths.

The waterproof layer constructed by the method of the present invention has a series of continuous ventilation channels as described above, so that the water vapor emitted from the base concrete is dispersed in all directions by the ventilation channels and collected in one place. Because there is no blistering phenomenon in the waterproof layer, even if there is a large amount of evaporated water, this ventilation path is formed on the entire surface of the waterproof layer, so if an exhaust device is installed on the side of the construction, it can be used as needed. Since it can be discharged into the outside air, the waterproof layer will not swell.

, and the waterproof sheet used for this construction is:
Thick asphalt sheets, thick synthetic resin sheets, or synthetic rubber sheets are suitable for use; in the case of such sheet materials, the waterproof notebook is thick enough to achieve the purpose of waterproofing with one layer of construction, but thin asphalt sheets When using a waterproof notebook such as Ing, after pasting the waterproof sheet (1) by point gluing as described above, apply molten asphalt to this surface as in the conventional thermal construction method, and then It is also possible to complete the waterproof layer by laminating one or two layers, and an effective waterproof layer can be obtained.

The waterproofing method of the present invention is based on the above-mentioned construction method, and has the following problems in sheet waterproofing:
The present invention has an epoch-making effect in waterproofing construction by completely eliminating the occurrence of water leakage accidents due to "blisters" and making waterproofing work easy and complete, especially in winter in cold regions.

[Brief explanation of the drawing]

1, J Figure 1 shows a perspective view of the waterproof layer construction surface during construction, and Figure 8 shows a cross section of the waterproof layer. (1)・Waterproof sheet (2)・・Primer (3)・Adhesive for spotting (4)・・Vent passage in unconnected areas Figure 1 Figure 2

Claims (1)

[Scope of Claims] (1) A two-component solvent type epoxy primer is applied to the concrete base surface of a rooftop, etc., without applying an epoxy room-temperature curing adhesive to the surface coated with the primer. , apply dots on small areas at appropriate intervals, and apply the dots on small areas at appropriate intervals.
The blistering-preventing waterproofing according to claim (1), which uses a sheet with a thick asphalt waterproof sheet attached to the surface and an asphalt waterproof layer formed by an adhesive dotted on the small area. Construction method. (3) The blistering prevention waterproofing construction method according to claim (1), which uses a synthetic rubber sheet instead of the asphalt waterproof sheet. (4) The first layer of asphalt waterproof sheet is attached to the base surface by point adhesion. The blistering prevention waterproofing method according to claim (1), further comprising spraying molten asphalt on the surface to form an asphalt waterproof sheet.