JPH0742326A - Asphalt roofing and construction method using ther roofing - Google Patents

Abstract

PURPOSE:To improve watertightness and obtain excellent work efficiency by making only a joint part in the lowermost layer of asphalt roofing which makes the lowermost layer a layer of self-bonded material a layer of non-bonded material. CONSTITUTION:A surface layer 1 consists of a layer of mineral powder or synthetic resin powder and a lowermost layer consists of layers of self-bonded material 5, 5 to constitute aspahlt roofing. In this roofing, only a joint part in the lowermost layer consists of a layer made of non-bonded material 6 which is selected from a group made of mineral powder and thermoplastic synthetic resin powder or film without using the self-bonded material. Roofing is done on a concrete bed 8 by using bonding force of the layer of the self-bonded material 5. Then, the layer of non-bonded material 6 in the lowermost layer of upper roofing which is equal to the joint part and the surface layer 1 in the lower roofing are melted by heating to integrate both roofings.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an asphalt roofing used for waterproofing a building and a waterproofing method using the same.

[0002]

2. Description of the Related Art In waterproofing a building, while using high-temperature asphalt melted at a construction site as an adhesive,
A so-called asphalt waterproof thermal method of forming a waterproof layer by laminating a plurality of so-called asphalt roofing sheets made of asphalt has been widely used as a mainstream of waterproofing work. This construction method has very high waterproof reliability, and particularly the watertight reliability of the sheet joint. Therefore, it still accounts for the majority of the total waterproofing work. However, in this method, since it is necessary to dissolve a large amount of asphalt, solid asphalt is put into a large kettle and melting is performed using a heavy oil burner having a large amount of heat. As a result, the asphalt may be locally overheated, resulting in thermal decomposition of the asphalt to generate smoke and odors that pollute the surrounding environment, and it is apt to be shunned in dense residential areas and urban centers. Moreover, since hot asphalt is handled during work, workers are at risk of being burned and their clothes are soiled, which is especially disliked by young people, and the number of workers is becoming chronically short. On the other hand, so-called sheet waterproofing is widely used in which rubber or plastic sheets are attached with adhesives without using molten asphalt at all at the construction site, but in most cases a waterproof layer is formed with only one sheet. Do 1
Since it is a layer waterproof system, it is far behind the asphalt waterproof thermal method in terms of waterproof reliability. Against this background, the advent of an asphalt waterproofing method having high reliability without using molten asphalt during construction has been strongly desired among users. As one of the countermeasures, one that has been put on the market is a so-called self-adhesive waterproofing method of forming a waterproof layer using a waterproof sheet made of asphalt having a self-adhesive layer or modified asphalt. The construction method appeared on the market about 20 years ago, and the degree of widespread use has increased particularly in the last few years, and among the various waterproof construction methods, its existence is gradually being established. However, the weak point of the self-adhesive waterproofing method is that the reliability of the joint between the waterproof sheet and the waterproof sheet tends to be insufficient.

[0003]

[Objective] The object of the present invention is to exhibit water-tightness as good as that of a thermal method, while improving work efficiency as high as a self-adhesion process using an asphalt roofing having a self-adhesive layer. The purpose is to provide an asphalt roofing that can be used and a construction method using it.

[0004]

[Structure] The first aspect of the present invention is an asphalt-based roofing in which the surface layer is a layer of mineral powder or synthetic resin powder and the bottom layer is a self-adhesive layer, and only the joint part of the bottom layer is a self-adhesive layer. The present invention relates to an asphalt-based roofing characterized by comprising a layer made of a non-adhesive material selected from the group consisting of mineral powder and thermoplastic synthetic resin powder or film. A second aspect of the present invention is that after performing construction using the adhesive force of the self-adhesive material layer of the asphalt-based roofing, a non-adhesive material portion which is a lowermost layer of the upper asphalt-based roofing and a lower portion corresponding to a joint portion. The present invention relates to a waterproofing method for asphalt-based roofing, characterized in that a mineral powder layer, which is a surface layer of the asphalt roofing on the side, is heated and melted, and both are integrated by welding. The third aspect of the present invention is to perform construction using the adhesive force of the self-adhesive material layer of the asphalt roofing, and then the non-adhesive material portion which is the lowermost layer of the upper asphalt roofing corresponding to the joint portion and the lower side. The present invention relates to a waterproofing method for asphalt roofing, which comprises applying molten asphalt between a layer of mineral powder or synthetic resin powder, which is the surface layer of the asphalt roofing, and then integrating the two.

The reason why only the joint portion of the lowermost layer is composed of a non-adhesive material selected from the group consisting of mineral powder and thermoplastic synthetic resin powder or film instead of the self-adhesive material is as follows. is there. A self-adhesive material layer is used for all the bottom layers of the asphalt roofing, which corresponds to the upper side of the joint, is a conventional so-called self-adhesive asphalt roofing, and it is true that it still exhibits considerable watertightness. However, as shown in FIG. 3, voids 13 are likely to occur in the joint portion,
This becomes a waterway and causes water leakage.

Therefore, in the present invention, the lowermost layer of the asphalt-based roofing corresponding to the joint portion is made of a non-adhesive material, and both of this portion and the lower surface layer facing each other are burner or heated air. By heating and melting with or by applying molten asphalt to the joint part, it was devised so that this part was densely filled with asphalt without forming the voids, that is, the water channels as described above. It is a thing. When applying molten asphalt, there is a side that may be left as a self-adhesive layer or as an asphalt layer even if the bottom layer of the upper asphalt-based roofing is not a non-adhesive layer, Not really.

[0007] Asphalts exhibit tackiness particularly in a high temperature condition such as in summer, and although the joint portion has a defect in terms of watertightness, they adhere to each other, and molten asphalt is applied to the joint portion. You will not be able to do it. Therefore, it is necessary to take measures to prevent the upper and lower asphalt-based roofings from adhering to each other incompletely in this joint portion, and in this sense, the layer of non-adhesive material is indispensable.

In the case of claim 3, it is a fact that it is necessary to melt the asphalts on site. However, compared to the amount of molten asphalt used in the conventional molten asphalt waterproofing method, the amount of molten asphalt used in the third aspect of the invention is extremely small. Therefore, when asphalt is melted, there is little possibility of overheating and the generation of odor is extremely low.

The asphalt-based roofing is not particularly limited as long as the surface layer has a mineral powder layer and the bottom layer has a self-adhesive layer, and it is commercially available as a self-adhesive asphalt-based roofing until now, or Everything proposed can be covered. The self-adhesive material is also not particularly limited, but usually the following asphalt-based composition can be used. Asphalt composition: SBS * 1 10 to 20 parts by weight Asphalt 55 to 75 parts by weight Tackifier * 2 5 to 15 parts by weight Process oil 5 to 15 parts by weight * 1; SBS is a styrene-butadiene block copolymer. * 2: The tackifier is a polymer or copolymer of a C ₅ and / or C ₉ unsaturated fraction, a so-called petroleum resin.

For the mineral powder layer, particles or powder of minerals such as silica or sand particles can be used, and the shape and size of the powder particles are similar to those of the conventional ones. Also in the case of synthetic resin powder, those having the same shape and size as mineral powder can be used.

Examples of the thermoplastic synthetic resin as the non-adhesive material include polyolefin such as polyethylene and polypropylene, polyvinyl chloride, polyester, polyamide and the like, and the synthetic resin constituting the synthetic resin powder of the preceding paragraph is also These same materials can be used.

The present invention will be described in detail with reference to the drawings. FIG. 1 is a cross-sectional view of the asphalt roofing of the present invention, 1 is a layer of mineral powder or synthetic resin powder, and 2 is
Asphalt is, for example, a layer of straight asphalt or modified asphalt, 3 is a base material layer, and for example, woven or non-woven fabric such as natural or synthetic fiber or glass fiber can be used. 4 is a layer made of asphalt similar to 2, 5 is a self-adhesive layer, and 6 is
The non-adhesive material layer is a mineral powder layer, a synthetic resin powder layer, or a film layer. Using this asphalt roofing, the self-adhesive material layer 5 is adhered to the concrete substrate 8 and the joint portion is heated to melt the asphalt layer next to the layer of mineral powder or synthetic resin powder. Alternatively, the non-adhesive layer at room temperature melts and becomes tacky, and the asphalt layer next to it melts, and the upper asphalt-based roofing and the lower asphalt-based layer are melted in a state like 7 in FIG. The gaps in the roofing are filled, and the fusion-bonded portion 7 is formed to completely bond the both. Even when the molten asphalt is applied, the molten asphalt fills the voids 13 and forms the fusion-bonded portion 7 to completely bond the both. On the other hand, the conventional type construction in which the lowermost layers 11 and 12 of the asphalt-based roofing are all formed of the self-adhesive adhesive material layer 14 and adhered onto the concrete base 8 is As shown in FIG. 3, a void 13 remains in the joint portion, which becomes a water channel and becomes a waterproof defect.

[0013]

[Effect] According to the present invention, the water-tightness is as excellent as that of the thermal method, while the work efficiency is as good as the self-adhesion process using the asphalt roofing having the self-adhesive layer. be able to.

[Brief description of drawings]

FIG. 1 shows a cross-sectional view of an asphalt-based roofing showing one embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a result of construction using the asphalt-based roofing of the present invention showing one specific example of the present invention.

FIG. 3 is a cross-sectional view showing a construction result using a conventional type asphalt roofing having a self-adhesive layer.

[Explanation of symbols] 1 mineral powder layer 2 modified asphalt layer 3 base material layer 4 modified asphalt layer 5 self-adhesive material layer 6 non-adhesive material layer 7 fusion bonding part 8 concrete foundation 11 upper asphalt roofing 12 lower asphalt system Roofing 13 Void 14 Self-adhesive layer for asphalt roofing

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takeyuki Shirai 1-3-1 Kodai, Adachi-ku, Tokyo Tajima Roofing Co., Ltd.

Claims (3)

[Claims] 1. In an asphalt roofing in which the surface layer is a layer of mineral powder or synthetic resin powder and the bottom layer is a self-adhesive layer, only the joint part of the bottom layer is
An asphalt-based roofing comprising a layer made of non-adhesive material selected from the group consisting of mineral powder and thermoplastic synthetic resin powder or film, not self-adhesive material. 2. After performing construction using the adhesive force of the self-adhesive layer of the asphalt roofing according to claim 1,
The non-adhesive material part, which is the lowermost layer of the asphalt roofing that corresponds to the joint part, and the layer of mineral powder or synthetic resin powder, which is the surface layer of the lower asphalt roofing, are heated and melted to integrate them. A waterproofing method for asphalt roofing, which is characterized in that 3. After performing construction using the adhesive force of the self-adhesive material layer of the asphalt roofing according to claim 1,
After applying the molten asphalt between the non-adhesive material part that is the bottom layer of the upper asphalt roofing corresponding to the joint part and the layer of mineral powder or synthetic resin powder that is the surface layer of the lower asphalt roofing, A waterproof construction method for asphalt roofing that is characterized by integrating both.