JP2002256677A - Waterproofing construction for floor surface of building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a waterproofing construction for the floor surface of a building which hardly causes water leakage even after the use for a long period of time in the waterproofing construction for the floor surface of the building. SOLUTION: In the waterproofing construction for the floor surface of the building laminated with layers containing oil component such as asphalt on the upper surface of the rubber sheet, an oil repellant protection film is applied at the upper surface side of the rubber sheet.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waterproof structure for a building floor.

[0002]

2. Description of the Related Art Conventionally, for example, a waterproof structure of a floor provided with a tile such as an entrance in a building room or a bathroom is provided with a rubber sheet 2 and a rubber asphalt sheet 3 on a top of a flap 1 as shown in FIG. , The elastic epoxy resin 4 and the tile 5 are sequentially laminated.

[0003]

However, in the structure described above, the rubber asphalt sheet 3 containing a large amount of oil is laid on the upper surface of the rubber sheet layer 2.
The oil migrates to the lower rubber sheet layer 2 and the rubber sheet layer 2 is softened, while the rubber sheet layer 2 is softened.
In some cases, the asphalt layer 3 to be joined is hardened or shrunk. As a result, there is a problem that the two layers do not function properly in the building waterproof structure. In view of the above, an object of the present invention is to provide a waterproof structure for a building floor surface which is unlikely to cause water leakage or the like even when used for a long period of time, in order to solve the above-mentioned problem.

[0004]

According to a first aspect of the present invention, there is provided a waterproof structure for a floor of a building according to the present invention, wherein a layer containing oil such as asphalt is laminated on an upper surface of a rubber sheet. A waterproof structure for a floor of a building, wherein an oil-repellent protective film is provided on an upper surface side of the rubber sheet. A waterproof structure for a building floor according to a second aspect is characterized in that the rubber sheet according to the first aspect is mainly made of ethylene propylene rubber or butyl rubber. Claim 3
The waterproof structure of a building floor described in (1) is characterized in that polyethylene or polypropylene is used as the protective film, and the protective film is thermally fused to the rubber sheet.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION A waterproof structure for a building floor according to the present invention is, for example, ethylene-propylene rubber (EPDM),
Low-, medium-, and high-density polyethylene (PE), polypropylene (PP),
Alternatively, an oil-repellent protective film made of polyethylene terephthalate (PET) or the like is provided. As the protective film, if the temperature difference is large at the place where the rubber sheet is provided, or if there is much oil to be transferred to the rubber sheet, PE
When T is suitable and impact resistance is particularly considered, PP
Is suitable, and if cost is particularly important, PE is suitable, and these may be appropriately selected according to the place where the rubber sheet is laid. Further, as a method of providing the oil-repellent protective film on the rubber sheet, there is a method of bonding or welding, but using heat remaining in the rubber sheet after a heat treatment performed for vulcanizing the rubber sheet. If the protective film is fused, a waterproof rubber sheet for buildings can be manufactured without increasing costs such as material costs and man-hours as compared with the case where an adhesive is used. The rubber sheet provided with the protective film is laminated, for example, on the upper surface of a dowel. Then, a layer containing a large amount of oil, such as a rubber asphalt sheet, is laminated thereon, and an elastic epoxy resin and a tile are laminated above the layer to provide a waterproof structure for floors such as entrances and bathrooms.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a waterproof structure for a building floor according to the present invention will be described with reference to the drawings. (Example 1) In order to vulcanize a 1.0 mm thick unvulcanized rubber sheet mainly composed of EPDM, a temperature of 180 ° C to 20 ° C was used.
After heating at 0 ° C, it is cooled to 80 ° C to 100 ° C,
A waterproof rubber sheet obtained by laminating an oil-repellent protective film 11 made of high-density PE having a thickness of 15 μm on one surface of the rubber sheet by heat fusion using the heat remaining on the rubber sheet at this time as shown in FIG. 12 were prepared. Next, a rubber asphalt sheet 6 having a thickness of 1 mm was laminated above the protective film 11 of the waterproof rubber sheet 10 as shown in FIG. In the rubber asphalt sheet, a PE sheet 8 for preventing rubber asphalt from flowing was interposed between rubber asphalt layers 7 and 7 containing a large amount of oil, and a layer 9 in which sand was solidified was laminated on the upper surface thereof. As the rubber asphalt, a mixture of about 10 parts by weight of a butyl-based binder and 100 parts by weight of an asphalt penetration of about 30 was used.

Example 2 In order to vulcanize a 1.0 mm thick unvulcanized rubber sheet mainly composed of EPDM,
After heating at 80 ° C to 200 ° C, 80 ° C to 100 ° C
° C, and using a heat remaining on the rubber sheet at this time, an oil-repellent protective film made of high-density PE having a thickness of 30 μm was laminated on one surface of the rubber sheet by heat fusion to obtain a waterproof rubber sheet. And a 1 mm thick rubber asphalt sheet 6 same as that used in Example 1.
Were laminated.

Comparative Example 1 In order to vulcanize a 1.0 mm-thick unvulcanized rubber sheet mainly composed of EPDM,
After heating at 80 ° C. to 200 ° C., cooling was performed to prepare a rubber sheet having a thickness of 1.0 mm, and a rubber asphalt sheet having a thickness of 1 mm same as that used in Example 1 was laminated.

Next, in order to observe the change due to the oil content of the rubber sheets in the laminated structures of Examples 1 and 2 and Comparative Example 1, each of them was subjected to accelerated curing in a gear oven at 100 ° C. As a result, as shown in Table 1, in the structure of Example 1, the strength was reduced by 5% from the initial state even after 7 days, and in the structure of Example 2, even the change in strength and elongation even after 7 days. I was not able to admit. On the contrary,
In the structure of Comparative Example 1, the strength after the elapse of one day is equal to the initial strength of 10%.
%, And 30% after 7 days. This 7
After the passage of days, the properties of the rubber sheet were such that the oil content of the asphalt was absorbed by the rubber sheet, so that the rubber sheet expanded and became soft and sticky.

[0010]

[Table 1] * Measurement of strength: Measure the thickness of the test piece formed in a dumbbell shape, mark the test piece with a marked line (20 mm), and then 500
It was pulled at a speed of mm / min with a force of 800 N / cm ² , and the elongation and the breaking stress were measured (JISA6301 without dumbbell).

Example 3 In order to vulcanize a 0.3 mm thick unvulcanized rubber sheet mainly composed of EPDM,
After heating at 80 ° C to 200 ° C, 80 ° C to 100 ° C
C., and using the heat remaining on the rubber sheet at this time, an oil-repellent protective film made of high-density PE having a thickness of 15 μm was laminated on one surface of the rubber sheet by heat fusion to form a rubber sheet. Polyester woven fabric is laminated on one side not subjected to laminating treatment to prepare a rubberized cloth, and the other surface has a thickness of 1.0 m similar to that used in Example 1 above.
m of rubber asphalt sheet.

(Comparative Example 2) A rubber-coated cloth in which a polyester woven fabric was laminated on a 0.3 mm-thick rubber sheet mainly composed of EPDM was prepared, and the same rubber asphalt sheet as in Example 3 was laminated.

The laminated structure of Example 3 and Comparative Example 2 was subjected to accelerated curing at 50 ° C. and 100 ° C. in a gear oven. As a result, as shown in Table 2, in the structure of Example 3, after a lapse of one month at each temperature, although the polyester woven fabric on the back surface was abnormal, the waterproof sheet did not bend. On the other hand, in the structure of Comparative Example 2, after one day at 100 ° C., the polyester woven fabric on the back surface turned black and the sheet itself was rolled up. Also, at 50 ° C, 1
After months, the sheet itself sagged, albeit with a slight change in color. The deflection of the sheet seen in the comparative example was caused by the asphalt layer above the rubber sheet layer flowing in the layer direction. That is, this is because, as the asphalt layer flows in the layer direction, a stress acting to deform the rubber sheet follows. On the other hand, in the rubber sheet of the present example, even if the asphalt flows to the left and right, the rubber sheet is hardly deformed because the laminated high-density PE sheet suppresses the deformation.

[0014]

[Table 2]

The reason why the change in the rubber surface in Comparative Example 2 in Table 2 is left blank is that the rubber sheet was deteriorated and the asphalt sheet could not be separated and observed. On the other hand, the reason why the rubber surface of Example 3 can be observed is that the film could be peeled off from the rubber sheet by interfacial peeling.

As described above, according to the embodiment of the present invention, it has been found that the protective film not only protects the rubber sheet from the external environment, but also contributes to stabilizing the state after construction. Also, high-density PE sheets are inexpensive,
It does not affect the unit price of the rubber sheet. Even if it is scratched, it can be easily repaired if it is added and pasted with a commercially available iron.

[0017]

According to the waterproof structure of the building floor of the present invention, the rubber sheet is provided with the oil-repellent protective film, so that the rubber sheet layer and the oil-containing layer laminated on the rubber sheet layer are formed on the rubber sheet layer. The transfer of oil between the two layers can be prevented, and deterioration of both layers can be prevented, so that the entire waterproof structure can be made durable.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view for explaining one embodiment of a building waterproof sheet of the present invention.

FIG. 2 is a cross-sectional view for explaining one embodiment of the architectural waterproofing sheet of the present invention.

FIG. 3 is a cross-sectional view for explaining a conventional waterproof structure of a building floor.

[Description of Signs] 1 Reinforcing board 2 Rubber sheet 3 Rubber asphalt 4 Elastic epoxy resin 5 Tile 6 Rubber asphalt sheet 7 Rubber asphalt 8 Polyethylene woven cloth 9 Layer hardened sand 10 Rubber sheet 11 Protective film 12 Architectural waterproof sheet

Claims (3)

[Claims] 1. A waterproof structure for a building floor in which a layer containing oil such as asphalt is laminated on an upper surface of a rubber sheet, and an oil-repellent protective film is provided on an upper surface side of the rubber sheet. A waterproof structure for a building floor. 2. The waterproof structure according to claim 1, wherein the rubber sheet is mainly made of ethylene propylene rubber or butyl rubber. 3. The waterproof structure for a floor of a building according to claim 1, wherein the protective film is made of polyethylene or polypropylene and is heat-sealed to the rubber sheet.