JPS6056834B2 - Insulated roofing and insulated asphalt waterproofing construction method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improved insulating roofing method used in the insulation method that has been widely adopted in recent years in asphalt waterproofing work on the roofs of buildings, etc., and an insulated asphalt waterproofing method using the same. It concerns construction methods.

The insulation method is a method in which when constructing a waterproof layer, a waterproof sheet is applied closely to the entire surface of the base, but is partially adhered to prevent cracks in the base from directly reaching the waterproof layer, thereby preventing the waterproof layer from breaking. There are construction methods for this purpose.

For this purpose, there is a conventional Japanese Industrial Standard for perforated asphalt roofing (JISA6023). By laying it on the base surface and pouring asphalt on it, the asphalt that passes through the hole will bond to the base at points, forming a non-adhesive area between the roofing and the base,
It forms a waterproof layer that is insulated from the base. The disadvantage of this perforated roofing is that it is just a large number of circular holes made in the loop ink. If the base surface is smooth, the hole perforation loop ink placed on top of it will be in close contact with the asphalt, and when trying to adhere it in dots to the underlying surface, it will be possible to obtain a good point adhesion with asphalt. Since the concrete subsurface is often not smooth and has many irregularities, the recesses on the lower surface of the roofing become gaps and a large amount of asphalt flows in, making it impossible to obtain a desired spot bond and, therefore, to obtain the desired non-bonded area. First, there is a drawback that the above-mentioned purpose of insulation is lost and the purpose of preventing breakage of the waterproof layer is not achieved.

Since there are many holes in the roofing, the tensile strength and tear strength are extremely low.

In addition, adhesive may be applied to the base of a waterproof sheet in advance in dots, or adhesive such as rubber asphalt is filled to the bottom of the cutout of a base material with many cutouts, and the adhesive is applied to the base surface. A so-called room-temperature method has been devised in which point bonding is applied under pressure, but since concrete subsurfaces such as roofs of buildings are often uneven as mentioned above, it is difficult to bond when the waterproof sheet does not fit well, such as in winter, resulting in poor adhesion. In this situation, the waterproof layer may peel off due to strong winds or shift due to the vibrations and behavior of the building.

In view of the above conventional drawbacks, and as a result of various studies and experiments, the present invention has been developed by laminating a perforated sheet and a reticulated woven fabric as shown in Fig. 1, and by abutting the mesh against the lower surface of the perforation and passing through the mesh to ensure that only the perforation part is secured. The object of the present invention is to provide a good insulating roofing and insulating asphalt waterproofing construction method that can firmly adhere to the base and form a desired non-adhesive area.

That is, the insulating roofing of the present invention involves punching a large number of holes in a nonwoven fabric or roofing base paper with a basis weight of 30 to 200 y/d made of organic or inorganic fibers impregnated with and/or coated with asphalt, and measuring the total area of the holes. perforated sheet 2 whose surface area is 8 to 40% of the total surface area, and a 5 to 20 mesh woven mesh fabric 3 with or without asphalt impregnation.
This is an insulating roofing 1 for asphalt waterproofing characterized by laminating and bonding together.

Moreover, this insulating roofing 1 is attached to a concrete base surface 5.
The method is characterized in that the reticulated woven fabric 3 is laid with the lower surface facing down, a thick layer of heated and molten asphalt 7 is applied thereon, and point-bonded to the base surface 5 through the hole 4 and the mesh of the reticulated woven fabric 3. This is an insulation asphalt waterproofing construction method.

In the construction of insulating roofing, organic or inorganic fibers include synthetic fibers, animal and plant fibers, glass, and asbestos fibers, which are used as nonwoven fabrics or roofing base paper.

The basis weight is 30. When ~200y/d is processed with asphalt, it is suitable for waterproofing, reinforcing properties, and handling. After this is impregnated and/or coated with asphalt, holes of any shape are evenly distributed over the entire surface and used as the perforated sheet 2. The hole is circular and the diameter is 10 to 3.
The order of 0 is preferable. What is important is that the total area of all holes is 8-40% of the total surface area, most preferably 10-20%. If it is less than 8%, the adhesion area to the base is small and the adhesive force is poor, and there are drawbacks such as peeling due to strong winds or displacement of the waterproof layer due to vibration if the base has a large slope.

If the area ratio of the hole is 40% or more, the bonding area becomes too large, the insulation properties are poor, and the waterproof layer is likely to break due to cracks in the base. The net-like woven fabric 3 is made of synthetic fibers, glass fibers, and natural fibers and is woven into a net shape.

The mesh size is 5 to 20 meshes (5 to 20 meshes/inch), preferably 10 to 15 meshes. If it is less than 20 mesh, the high viscosity heated molten asphalt (asphalt for waterproofing work) will not penetrate well during construction, and the point adhesion to the base will be poor, and if it is more than 5 mesh, the mesh will be too large and the asphalt will pass through too much. Therefore, especially if the underlying surface is uneven,
As a result of many experiments and actual construction, it was found that a large amount of asphalt flows in, impairing the insulation properties that allow the formation of the desired non-adhesive area.

This reticulated woven fabric 3 can be impregnated with asphalt by passing it through molten asphalt, if necessary, to provide corrosion resistance, water resistance,
Although it is preferable from the viewpoint of adhesiveness, in the case of corrosion-resistant materials such as glass fibers, the asphalt treatment can be omitted. The insulated roofing of the present invention is obtained by laminating and bonding together.

Alternatively, it may be manufactured by bonding perforated nonwoven fabric or roofing base paper and reticulated woven fabric with an adhesive, and then impregnating the fabric with asphalt. Next, the insulation asphalt waterproofing method according to the second invention of the present application will be explained.

FIG. 3 is a cross-sectional view of the waterproof construction layer according to this construction method, in which a primer 6 is applied to the surface of the concrete base 5 and dried.
The above-mentioned insulating roofing 1 is covered with its net-like woven fabric surface 3 as a base material 5.
Lay it in contact with the Next, asphalt heated and melted at 200°C to 280°C (JIS waterproofing asphalt)
Pour it onto the top surface of the insulating roofing 1 using a ladle etc.
When applied thickly (1.2 to 1.5k9/Rd), the asphalt passes through the hole 4 and then through the reticulated fabric 3.
Glue in dots on the base surface9. In this case 200℃~280℃
Asphalt heated and melted has a viscosity of 50 to 10
011) Since it is PS, the amount of asphalt that permeates through the 5-20 mesh net woven fabric 3 that is the lower layer is limited, and even if the concrete base surface has some degree of unevenness, it restricts the asphalt from flowing in a large amount and prevents the asphalt from flowing in properly. A point adhesion state corresponding to the area of the hole can be obtained. Furthermore, asphalt can be firmly bonded to the base reinforced with reticular fibers. Roofing 8 is preferably further applied as a covering layer on top of the thickly applied asphalt layer 7, thereby completing the insulating asphalt waterproofing construction method of the present invention. Characteristic effects of the insulated asphalt waterproofing method using the insulated roofing of the present invention having such a configuration are as follows: 1. The asphalt that has passed through the 5 to 20 mesh reticulated fabric 3 forming the lower layer of the perforated sheet 2 causes dots on the underlying surface. Since it is bonded, even if the base is extremely uneven, a desired non-bonded area can be formed on the underside of the roofing without a large amount of asphalt flowing in and damaging the point bonding, making it possible to complete a good insulation method. . 2 The weakness of the tensile strength of the conventional perforated asphalt roofing has been improved, and the strength is high because the reticulated woven fabric 3 of 5 to 20 mesh is laminated and bonded together.

The triple insulation asphalt waterproofing construction method fills the hole of the insulation roofing with molten asphalt, and adheres to the base surface with the reinforced asphalt that includes the mesh fibers of the lower layer reticulated fabric, so it has great adhesion. It is possible to form an asphalt waterproof layer that is highly waterproof and tough.

4. In addition, the non-adhesive gaps between the base surface and the waterproof layer other than the point bonded parts have the effect of diffusing the water vapor pressure released from the concrete and preventing the occurrence of blistering of the waterproof layer.

[Brief explanation of drawings]

Fig. 1 is a perspective view of the insulated roofing, Fig. 2 is a perspective view of the insulating roofing.
FIG. 3 is an enlarged cross-sectional view taken along the line A-A, and FIG. 3 is a cross-sectional view of the waterproof construction layer. 1... Insulated roofing, 2... Perforated sheet, 3... Reticulated woven fabric, 4...
You, 5... Concrete base, 6...
・Primer, 7... Asphalt, 8...
... Roofing, 9... Point bonding part.

Claims (1)

[Scope of Claims] 1 A large number of holes are punched in a non-woven fabric or roofing base paper with a basis weight of 30 to 200 g/m^2 made of organic or inorganic fibers impregnated or/and coated with asphalt, and the total area of the holes is Asphalt waterproofing characterized by laminating and bonding a hole-perforated sheet whose surface area is 8 to 40% of the total surface area and a 5 to 20 mesh woven fabric impregnated with asphalt or not impregnated with asphalt. Insulated roofing. 2 A large number of holes are punched in a non-woven fabric or roofing base paper with a basis weight of 30 to 200 g/m^2 made of organic or inorganic fibers impregnated with and/or coated with asphalt, and the total area of the holes is calculated based on the total surface area. An insulating roofing for asphalt waterproofing characterized by laminating and bonding a perforated sheet of 8 to 40% and a 5 to 20 mesh woven fabric impregnated with asphalt or not impregnated into one piece, Insulating asphalt waterproofing characterized by laying a net-like woven fabric facing down on a concrete subsurface, pouring a thick layer of heated and molten asphalt over it, and point-bonding it to the sub-surface through a hole and the net-like woven fabric. Construction method.