JP2968708B2 - Asphalt waterproofing sheet and asphalt waterproofing construction method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an asphalt waterproofing sheet and an asphalt waterproofing method suitable mainly for waterproofing a roof of a building, and further for waterproofing a balcony, a basement or the like.

[0002]

2. Description of the Related Art Conventionally, a waterproof sheet is applied to the upper surface of a concrete slab foundation on the roof of a building or the like, or the purpose of repairing an old waterproof sheet that has already been waterproofed on the concrete foundation surface. As
Without peeling off the old waterproof sheet, this as a base,
Waterproofing is being carried out by applying a new waterproofing sheet on the upper surface. As the waterproofing work, work efficiency is achieved by driving nails and staples into the ground through washers without attaching the entire surface of the waterproof sheet to the underground surface, and then bonding only the overlapping parts of the adjacent waterproof sheets. A good waterproof construction method is known. In this case, when a waterproof sheet made of a synthetic resin such as a vinyl chloride resin sheet is used as the waterproof sheet, the sheet shrinks or the adhesion between the synthetic resin sheet and the washer is difficult, requiring a high degree of skill. In particular, in the case of a vinyl chloride resin sheet, the plasticizer escapes with age, so the sheet hardens and becomes brittle, and at the same time, the entire sheet shrinks, so the adhesive part is easily peeled off. Since the through hole is enlarged, there is a risk of water leaking from the enlarged portion. In addition, when this vinyl chloride resin sheet is applied on top of the concrete asphalt waterproofing sheet without repairing it for repair of the old asphalt waterproofing sheet that was previously applied, the plasticizer will be replaced with asphalt over time. In order to prevent this, an insulating sheet such as a polyethylene foam sheet must be interposed in order to prevent this, and the construction work is disadvantageously increased in time and labor, and the construction cost is also increased. When a conventional asphalt waterproofing sheet is used in order to solve the inconvenience of such a synthetic resin waterproofing sheet, a nonwoven fabric is generally used as a base material of the waterproofing sheet. That is, when reducing the basis weight of the nonwoven fabric, that is, when reducing the mass per unit area, impregnating and coating it with asphalt to form an asphalt waterproof sheet, the asphalt coating is thick enough to be melted by a torch burner. On the other hand, the tensile strength of the asphalt waterproofing sheet is significantly reduced. He disliked it and found that a very long washer was required to prevent this. According to various studies, its tensile strength is at least 20K.
gf / cm is sufficient.
f / cm or more, the basis weight of the nonwoven fabric is 300 g
/ M ² or more, and when impregnating and coating with asphalt, if the required amount of coating is applied, the thickness is too thick and the weight is too heavy, and the transportation and construction work As it may hinder the use of the paint, usually the amount of coating is reduced.
This makes the sheet unsuitable for fusion bonding between sheets by a torch burner, which causes the inconvenience of having to use asphalt heated and melted on site. As described above, it was found that an asphalt waterproof sheet having excellent tensile strength against strong winds could not be obtained as long as the base material was a nonwoven fabric. Therefore, since it is a waterproofing construction method using an asphalt waterproofing sheet having the above-mentioned nonwoven fabric as a base material and fixing it by inserting a locking pin into a foundation through a pin hole of a washer, especially in a strong wind Fixing means with constant tensile strength have not been taken into account. In view of the above-mentioned problems of the prior art, solving this problem, development of an asphalt waterproof sheet having a large tensile strength, lightweight, thin, and easy to handle, and this kind of asphalt waterproofing construction method using fixing means having high damage resistance due to strong winds The development of is desired.

[0003]

Means for solving the above problems of the present invention is to provide an asphalt waterproof sheet obtained by impregnating and coating an asphalt waterproofing material on a base material, wherein the base material comprises a nonwoven fabric and a mesh. Ru consists of laminated substrate of the
In asphalt waterproof sheet, in particular, the mass per unit area of said laminate base material, 100 to 200 g / m
^{2. The} amount of asphalt waterproofing material impregnated and coated on the laminate substrate is 2800-3500 g / m ² ,
The tensile strength specified in A 6013 is 20 to 30 kgf
/ Cm, the dimensional stability you <br/> characterized in that 0 to 0.5%.

A further object of the present invention is to provide an asphalt waterproofing method for forming a stable, robust and highly reliable waterproofing surface on a ground surface by using the asphalt waterproofing sheet of the present invention. A washer having a width smaller than the overlapping margin is applied to the upper surface of the overlapping margin on one side of the asphalt waterproofing sheet of the present invention laid on the foundation composed of the old waterproofing sheet to be repaired or provided on the upper surface of the concrete slab. And fixing means for driving and fixing to the base of the concrete slab by a pin passing through at least one locking pin hole provided in the washer at a predetermined interval along the overlapping margin. The back side of the adjacent asphalt waterproof sheet is melted using a torch burner on the other side, and pressed and adhered to the upper surface of the fixed side stack. It is characterized in. In the above asphalt waterproofing method of the present invention, in particular, the present invention provides an asphalt waterproofing method that has peeling resistance due to strong winds and provides stable and robust waterproofing.
mm or less, with a perimeter of 225 to
It is characterized by using ² to 5 locking pins each having a diameter of 300 mm and a pull-out strength of 300 kg / f. In this case, a heat insulating board may be laid on the entire surface of the base in a state where the heat insulating boards are abutted against each other to obtain a heat insulating and waterproofing construction. Further, the corners of the four heat insulating plates are abutted with each other, one washer is straddled on the cross-shaped corner, and the locking pin hole of the washer located at the center of the cross-shaped joint is formed. By driving and fixing the threaded pin to the concrete base, four heat insulating plates can be fixed with one washer and pin, and the fixing operation is easily and quickly performed.

[0005]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view of an asphalt waterproofing sheet according to the present invention; In the drawing, reference numeral 1 denotes a laminated base material of the asphalt waterproof sheet A of the present invention shown in FIG.
The laminate substrate 1 is formed by laminating a nonwoven fabric 1a and a mesh 1b and bonding them together. The nonwoven fabric is made of synthetic fiber, glass fiber, or a mixed fiber of any of known materials such as polyester fiber, and is formed by wet or dry processing. The mesh is made of synthetic fibers, glass fibers, or spun (yarn) filament yarns made of a mixture of these fibers, crossed vertically and horizontally to form a lattice, and the intersections are bonded with an adhesive, woven like a cold gauze. However, in any case, the mesh is required to compensate for the strength of the laminate base material, and it is necessary that the dimensional stability is not impaired. . In this case, the thickness of the yarn is preferably from 250 denier to 1000 denier, and is generally used. The laminated substrate is manufactured by laminating a nonwoven fabric and a mesh and binding them together with an adhesive, or, as shown, when fabricating a nonwoven fabric by a wet or dry process, by fabricating a mesh. , Any one is fine. The mesh 1b shown in FIG. 1 is a type of "Crenet", a product name of Kurashiki Spinning Co., Ltd., made of a thin nonwoven fabric 1a made of a mixed fiber of polyester fiber and vinylon fiber and having a thickness of, for example, 0.7 mm. E2200 (Count 10
Mesh 1b of 00 denier yarn 2 × 2 yarns / cm)
Is applied when the nonwoven fabric 1a is subjected to wet papermaking. Incidentally, the mass per unit area of the laminate substrate 1 is 177 g / m ² , and the tensile strength is 22 kgf / c.
m. Of course, other types of crenets commercially available can be used. For example, polyester E3950
(Between 3 / cm) and E4523 (4.5 / cm)
Interval), VF3250 made by Vinylon (3 x 3.5 / interval),
Various coarse meshes such as glass GW1100 (between 1 / cm) can be used.

FIG. 2 shows the present invention which is mainly used as a roofing roof of a building manufactured by impregnating and coating an asphalt waterproofing material, for example, rubber asphalt, on a laminate substrate 1 shown in FIG. 1 shows an asphalt waterproof sheet A. In the illustrated example, the thickness of the asphalt waterproof sheet is 4 mm, of which the thickness of the laminated base material 1 is 0.6 mm, the thickness of each coated asphalt 2 on both sides is 1.7 mm, and the tensile strength is close to 30 kgf / cm. Met. In addition, as asphalt-based waterproofing material, JIS K
Blown asphalt having a penetration of 10 to 30 specified in 2207 (petroleum asphalt), three and four types of asphalt for waterproofing work, or those obtained by adding a filler such as talc as required, In order to easily increase the coating amount, the penetration should be 60 to 10
No. 0 straight asphalt is mixed with a block copolymer such as styrene / butadiene / styrene rubber or styrene / isoprene / styrene rubber in an amount of 5 to 20% by weight based on the asphalt. still,
Although not shown, the asphalt waterproofing sheet of the present invention shown in FIG. 2 has a structure in which fine particles of a mineral substance are usually sprayed on one surface of the coated asphalt 2, 2 or a synthetic resin film is adhered. However, it goes without saying that the other side is manufactured as an asphalt tarpaulin with sand sprinkled with sand. In this case, what is used as an asphalt waterproof sheet fixed to a concrete base by driving a locking pin through a washer is to be wider than the washer along one side edge in the length direction and one side edge in the width direction. For example,
When the width of the washer is 40 mm, the sand is not sprayed with a width of 150 mm and the fine particles of the mineral substance are scattered.

[0007] Thus, the laminate substrate of the present invention has a thickness of 0.1 mm.
Not only has dimensional stability of 5% or less, but also has tensile strength even if the mass per unit area is small. FIG.
The results of a comparative test of the tensile strength specified in JIS A 6013 with the tensile strength when the mass per unit area (g / m ² ) of the nonwoven fabric is changed and the tensile strength specified for each of the nonwoven fabrics whose mass per unit area is changed are shown. Show. As is clear from the comparison graph, the tensile strength of the laminate substrate 1 of the present invention is remarkably improved at the same mass per unit area as compared with the conventional nonwoven fabric substrate alone. The drawing also shows the tensile strength of the asphalt waterproof sheet of the present invention manufactured by impregnating and coating these laminated substrates with asphalt and the conventional asphalt manufactured by impregnating and coating asphalt on the base material of these nonwoven fabrics alone. Although the tensile strength of the waterproof sheet was shown, as a matter of course, the asphalt waterproof sheet of the present invention has a smaller mass per unit area of the nonwoven fabric 1a, that is, the basis weight, as compared with the conventional asphalt waterproof sheet. It can be seen that, despite being lightweight and thin, it has a remarkable tensile strength. Moreover, as is clear from FIG. 3 shows, when manufacturing the asphalt waterproof sheet using a large laminated base material 1 of such tensile strength, slightly, the basis weight of at least ^{100g / m 2 (g / m} 2)
It can be seen that an asphalt waterproof sheet having a high tensile strength of 24 kgf / cm can be obtained.

Another object of the present invention is to provide an asphalt coating method using a torch burner, which has a large tensile strength so that it is not peeled off even in a strong wind such as a typhoon, and is relatively thin and easy to handle. It is an object of the present invention to provide an asphalt waterproofing sheet suitable for melting, and as a result of many tests, an asphalt waterproofing sheet for achieving the object has a mass per unit area of the laminated base material of 10
0 to 200 g / m ² , the amount of asphalt-based waterproof adhesive to be impregnated and coated on the laminate substrate is 2800 to 3500 g
/ M ² , the tensile strength specified in JIS A 6013 is 20-30 kgf / cm, and the dimensional stability is 0-0.5.
%.

The reason why the mass per unit area of the laminated base material is 100 to 200 g / m ² is that 100 g / m ²
Is less than ^2, insufficient tensile strength of the waterproof sheet, and stiffness of the sheet becomes weak, easily workability "wrinkles" occurs and tends to become poor, whereas, if it exceeds 200 g / m ^2, impregnated asphalt amount Is 500 g / m ² , so that the amount of asphalt to be coated is too small at 2300 / m ² or less, the amount of melting of the coated asphalt by the torch burner is small, and there is a problem in water-tight joining between the overlaps of the waterproof sheet. Because it may cause In addition, if the coated asphalt amount is about 3000 / m ² , it does not hinder the fusion bonding of the roofing by the torch burner. However, especially when the temperature is low, the waterproof sheet becomes too strong and long. In such a case, handling properties such as the inability to be easily wound into a roll shape deteriorate.

[0010] The amount of the asphalt-based waterproofing adhesive impregnated and coated on the laminate substrate is 2800 to 3500 g.
/ Reason for m ^2, in less than 2800 g / m ^2, when joined at the overlap margin portion of the upper and lower asphalt waterproof sheet between its lower surface to melt the back surface of the coating covering the asphalt waterproof sheet overlapping from top torch burner The amount required to obtain good water tightness is insufficient when pressure-bonding to the overlap of the waterproof sheet, whereas when it exceeds 3500 g / m ² , the thickness of 1.7 mm on one side of the laminate base material This is too much for the torch burner to fuse and stick, which is not economical. Further, it is not preferable because the product becomes too heavy, and the transportation, the construction work, and other handling become poor.

Further, the tensile strength is in the range of 20 kgf / cm to 30 kgf / cm.
If it is in the range of Kgf / cm, if it is less than 20 Kgf / cm, an extremely long plate must be used as a washer for fixing the waterproof sheet to the base,
As a result, the edge of the long washer is weakened by the strong wind, and is lifted against the peeling stress, or in extreme cases, the both edges are bent upward, and as a result, the locking pin comes off. Would. In other words, the tensile strength is 20K
If it is not less than gf / cm, a stable fixation against strong wind can be obtained by a short washer, while if it exceeds 30 kgf / cm, the basis weight exceeds 200 g / m ² .
This is because the amount of the coated asphalt becomes too small, which hinders the fusion bonding of the waterproof sheet by the torch burner, which is not preferable.

The asphalt waterproofing sheet of the present invention constructed as described above using the laminated substrate 1 of the present invention as a core material has a dimensional stability specified by JIS A 6013 of 0.5% or less. . 0.5% dimensional stability
Is exceeded, waterproofing is repeatedly performed after the waterproofing, and a gap is formed around the axis of the locking pin hole and the locking pin, which eventually causes a water leakage accident, which is not preferable.

[0013] Thus, the asphalt waterproof sheet of the present invention having the above-mentioned structure has a large tensile strength despite its thinness and light weight, and can be easily handled in transportation and construction work. Sufficient and adequate, resulting in a watertight melt bond at the overlap of waterproof asphalt by torch burner, relatively short and 1
mm or less with a thin washer, does not bend against strong winds, and after waterproofing, the surface of the asphalt waterproof sheet that is melted and adhered to the upper surface of the washer becomes a convex surface seen when using a thick washer. The appearance appearance is also kept well without any problem.

According to the present invention, a concrete slab is used as a base, or a damaged old waterproof sheet already waterproofed on the base is used as a base, using the asphalt waterproof sheet having the above structure, and a heat insulating material sheet is provided on the upper surface thereof. The fixing means and the torch burner are used to secure the overlapping margin to the base by means of the locking pin and the washer with or without the laying surface of the laying surface, making it easy, efficient, watertight and stable. It can also perform asphalt waterproofing with high tensile strength to withstand strong winds.

In the asphalt waterproofing construction of the present invention,
FIG. 4 shows an example of a washer used for fixing the overlapping margin of the asphalt waterproof sheet to the base. FIG. 4A shows an example of the washer 3 having a thickness of preferably 1 mm or less, generally about 0.6 to 0.8 mm, and one locking pin hole 4 in the center. Having. Examples of the washer 3 include a stainless steel plate, a galvanized steel plate, and an aluminum plate, and it is preferable to use a stainless steel plate having excellent corrosion resistance. The shape is preferably a rectangle with four rounded corners, and the width is smaller than the overlapping margin of the asphalt waterproof sheet. For example, when the overlapping margin is set to 150 mm, the width is set to approximately one third of the width, that is, 40 to 50 mm, and the length is set to 90 to 10 mm.
It is a short rectangular plate of about 0 mm. Generally, it is preferable to increase the strength of the rib processed plate as shown in the figure. Further, the washer 3 'shown in FIG. 4 (b) has a length twice as long as that shown in FIG. 4 (a), that is, 80 to 200 mm. 4 (a) except that the locking pin holes 4 and 4 are provided. The washer 3 ″ shown in FIG. 4 (c) is for fixing the heat insulating plate, as will be described later, and has a locking pin hole 4 at the center.
Is a circular plate having a diameter of 80 mm and made of, for example, stainless steel, having a thickness of 0.7 mm, and having increased strength due to bending. Of course, the diameter and the material of the metal plate are selected and made as desired as in the case of the washer 3, 3 ″. In any case, the washer used for fixing the overlapping margin of the asphalt waterproof sheet of the present invention is For reasons described below, a rectangular plate having a circumference of 225 to 300 mm, for example, a width of 40 mm and a length of 73 to 110 mm is suitable.
(D) shows a typical example of the locking pin 5 passed through each locking pin hole 4 of the washer 3, 3 ', 3 ". As the locking pin of the present invention, It is preferable that the material driven into the concrete ground has a pull-out strength of about 300 kgf. For this purpose, a hole is drilled in the concrete ground, and a metal or plastic anchor plug is set in the hole. One that strikes a stop pin to open the leg or one that uses a metal or plastic curl plug in combination can be suitably used.
In FIG. 4D, the lower end of the anchor plug 5 is opened by driving in the former, that is, by driving the pin body 5a. 1 shows a locking pin 5 of the type. Locking pin 1
If the pullout strength per book is less than about 300 kgf,
Since the area occupied by the washer must be increased accordingly, the overlapping portion of the asphalt waterproof sheet is fixed to the base with the locking pin, and then the back surface of the adjacent asphalt waterproof sheet on the overlapping portion is overlaid. Must be melted with a torch burner and pressed and adhered to the upper surface of the washer, so that an increase in the area of the washer decreases water-tight joining and integration of the overlapping margins, which is not preferable. From this point, it is preferable to increase the pull-out strength by the locking pin 5 and to reduce the surface area of the washer as much as possible. As a result of the examination, it was found that the washer is preferably about 300 kgf / piece or more. When the length of the washer is extremely long, which is 2-3 m, the melting surface of the coating layer of the asphalt waterproof sheet heated by the torch burner is joined to the upper surface of the washer. The washer of the present invention may cause a sudden volume expansion at the high temperature and exert a lateral stress on the fixed locking pin, thereby decreasing the fixing force of the locking pin. Is at most 100-150m long
m, so that a decrease in fixing force due to the influence of lateral stress on the locking pin can be prevented.

FIG. 5 shows a base B of a concrete slab on the roof of a building using the asphalt tarpaulin of the present invention.
A large number of asphalt waterproof sheets A of the present invention wound on a roll having a length of 8 m shown in FIG.
An example is shown in which the asphalt waterproofing work of the present invention is performed over the entire surface of the concrete slab constituting the floor surface and the rising wall to the foundation B. FIG. 6 is a plan view of FIG.
Is a sectional view taken along line VII-VII of FIG. 6, and FIG. 8 is a sectional view taken along line VIII-VIII of FIG. FIG. 4 (a) shows the top surface of a 150 mm wide overlap margin a on one side in the length direction of the asphalt waterproof sheet A laid on the floor base B surface of the concrete slab within a width of 50 mm from the end surface.
The washer 3 shown in FIG. 4B or the washer 3 'shown in FIG. 4B is positioned and applied to the washer 3 shown in FIG.
The locking pin 5 shown in FIG.
Into the hole b of the boring drilled on the base B,
The lower end thereof is opened as shown in FIG. 7, and the head 5c of the anchor plug 5b is engaged with the peripheral portion of the hole 4 to fix the overlap allowance a. With such a fixing means, a large number of washers 3, 3,... Are arranged in a line at a constant interval in the length direction of the overlap margin a, for example, an interval of 800 mm.
Each locking pin 5 is driven into the ground, and the asphalt waterproof sheet A, that is, one of the asphalt roofing A
The side is fixed to the base B over the entire length. Next, the overlapping margin a of 150 mm width on the other side of the asphalt waterproof sheet A laid next to the asphalt coating layer 2 on the back side was heated and melted by a torch burner, and the melted surface was fixed below. It is pressed and stuck on the upper surface of the overlap margin a having a width of 150 mm including the washer 3. In that case, in particular, a watertight connection with the upper stacking margin a is reliably obtained in the outer 100 mm width where the washer 3 of the lower stacking margin a does not exist and over its entire length. In this manner, the above fixing means and the melt-pressing and sticking means by the torch burner are sequentially repeated at the overlapping margin of the adjacent asphalt waterproof sheet, thereby completing the waterproofing in the length direction. In the drawing, S indicates sand scattered on the coated asphalt surface. In order to fix the edges of the asphalt waterproof sheets A, A in the width direction in the vicinity of the rising wall on the floor surface of the concrete slab, FIG.
(B) The washer 3 'shown in the drawing is used, and the washer 3' is located within a width of 50mm from the end face thereof as shown in FIG. A fixing means for driving each of the pins 4 and 4 into the base B through the locking pin 5 and opening the lower end thereof and engaging the head 5a with the periphery of the hole 5 is provided. In the illustrated example, the same fixing means was provided at an interval of 500 mm in the width direction of the asphalt waterproof sheet, and fixed at two places. Next, on the upper surface of the fixed overlapping margin a having a width of 150 mm,
While the entire surface of the asphalt coating layer on the back surface is melted by the torch burner on the rising wall surface, the back surface of the 150 mm wide width margin on the lower side of the asphalt waterproof sheet A pressed and adhered is melted by the torch burner. Pressed and adhered. In this way, the foundation B of the concrete slab on the roof
The waterproof construction according to the present invention was completed on the surface.

In this waterproofing method, according to the present invention, when a thin and short rectangular plate of 1 mm or less, such as the washer 3, 3 ', is used, the washer 3, 3' is melted by a torch burner. The heated high-temperature coated asphalt surface is heated and hardly expands in volume, so that the fixing force of the locking pin 5 is not adversely affected. When the locking pin 5 as shown is used as the locking pin, the pull-out strength is preferably at least 300 kgf.

In general, when a strong wind is applied to a waterproof sheet on the roof of a building or the like, a negative pressure is generated on the surface of the waterproof sheet, and a force for floating the waterproof sheet acts. Further, when the wind becomes stronger, when the waterproof sheet is fixed by the fixing bracket, a large peeling stress concentrates on the edge of the washer, and the waterproof sheet is peeled or damaged. So, for example, if the wind speed is 6
In the case of 0 m / sec, according to the wind pressure calculation formula based on Article 87 of the Building Standards Law Enforcement Ordinance, 675 Kg at the rooftop corner
f / m ² , and a levitation force of 450 Kgf / m ² works in other general parts. When the pull-out strength of the locking pin 5 fixed to the concrete slab foundation is at least 300 kgf, the number of the locking pin 5 at the corner of the roof is 675 ÷ 300.
= 2.25 lines / m ² , at least 3 per m ²
You need a book. In the general section, 450/300 =
1.5 lines / m ² , and at least two lines are required. The number of the locking pins 5 may be large, but it is not economical to use more than necessary, and the number of locking pins 5 is preferably up to 5 / m ² because the operation becomes complicated. In addition, it is preferable that the washer can be fixed by inserting a plurality of locking pins 5 in a relatively long rectangular plate as shown in FIG.

According to the present invention, as described above,
Since the asphalt waterproof sheet has a tensile strength prescribed in JIS A6013 of 20 to 30 kgf / cm, the asphalt waterproof sheet A is fixed with the locking pins via washers 3, 3 ', and the fixed waterproof sheet is removed. When the waterproof sheet is to be peeled off by pulling, the strength at which the waterproof sheet is broken must be 300 kgf or more per locking pin. Therefore, when the safety factor is 50% and 450 kgf is used, if the tensile strength of the waterproof sheet is 20 kgf / cm, 450 ÷ 20 = 22.5 cm, and the length around the washer may be 225 mm. Become. When the safety factor is 100% from the viewpoint of design, the safety factor is 600 kgf, and 600 ÷ 20 = 30 cm. Therefore, the circumference of the washer may be 300 mm. For this reason, the washer used in the present invention is preferably a rectangular one having a peripheral length of 225 to 300 mm.

Thus, the tensile strength of 20 to 30 kgf /
cm of the present invention, the washer having a length of 225 to 300 mm around the washer and a locking pin having a pull-out strength of at least 300 kgf is driven by ² to 5 pins / m ^2. When fixing the overlapping margin a in the length direction and the width direction to the base, the wind speed is 60 M / sec. As a result, stable and robust asphalt waterproofing can be obtained without being peeled off. Further, since the dimensional stability of the asphalt waterproof sheet of the present invention is 0.5% or less, there is almost no expansion and contraction, and it is possible to prevent the occurrence of a water leakage accident for a long period of time.

FIG. 9 shows the same asphalt waterproofing method according to the present invention as described above.
The asphalt waterproofing sheet of the present invention is applied to the entire surface of the old waterproofing sheet A 'to be renovated, such as the asphalt waterproofing sheet or the synthetic resin waterproofing sheet such as a vinyl chloride resin sheet, which has been previously applied, without peeling it off. Sheet A,
A,... Are fixed by using washers 3, 3 'and locking pins 5 in the same manner as in the previous embodiment, so that the overlap a in the length direction and width direction of one side of the waterproof sheet A is fixed. Tarpaulin A next to
FIG. 8 is a cross-sectional view of a portion corresponding to FIG. 7 in a case where the waterproofing work of the present invention is performed by sequentially pressing and adhering the overlap margin a on the other side while melting with a torch burner. Thus, a new waterproofing surface can be obtained on the roof easily and economically. In this case, the above-described fixing of the overlapping portion of the asphalt waterproof sheet A of the present invention is performed avoiding a portion where the overlapping portion of the old waterproof sheet A 'is present. In addition, if necessary, the old waterproof sheet A 'may be fixed at or near the center in the width direction of each of the old waterproof sheets A' and at a plurality of positions along the length direction using washers of a desired size and shape and locking pins. I do.

FIG. 10 shows the foundation B of the concrete slab.
A large number of heat insulating plates C are laid on the entire surface of the heat insulating plate C so as to abut each other to form a heat insulating layer, and through the flat heat insulating layer, the asphalt waterproof sheet A of the present invention is used in the same manner as described above. FIG. 8 is a cross-sectional view of a portion corresponding to FIG. 7 when the waterproofing work of the present invention is performed.

FIG. 11 shows the foundation B of the concrete slab.
On the upper surface of the old waterproof sheet A 'to be repaired previously, a large number of heat insulating plates C are laid on top of each other to form a heat insulating layer, and the asphalt waterproofing of the present invention is formed on the upper surface. FIG. 8 is a cross-sectional view of a portion corresponding to FIG. 7 when waterproofing is performed by using the sheet A in accordance with the asphalt waterproofing method of the present invention in the same manner as above.

As shown in FIGS. 10 and 11, the heat insulating plate C
When laying, it is preferable to fix it to the concrete foundation. In this case, fixing as shown in FIG. 12 improves workability. That is, the four corner portions of the rectangular heat insulating plate C which are arranged side by side with each other abut each other, and the circular washer 3 ″ shown in FIG. When aligning the pin holes 4 for positioning, the washer 3 ″ is straddled over the four corner portions of the heat insulating plate C butted against each other, and the washer 3 ″ is evenly applied. And the pin 5 and the washer 3 "
The corner portions of the heat insulating plates C can be fixed. Similarly, for each portion where the four corner portions are abutted, the washer 3 ″ is fixed economically and easily by using one washer and one locking pin 5 to insulate them economically and easily. The entire laying surface of the plate can be fixed to the base B.

Next, a more detailed embodiment will be described. Example 1 The upper surface of the old asphalt waterproofing layer to be renovated, which was previously installed on the building roof, has a thickness of 4 mm, a width of 1050 mm, a length of 8 m and a width of 150 at one edge in the longitudinal direction.
A rubber asphalt roofing with sand having an exposed overlap margin on the side of the asphalt coating layer of mm is laid. The rubber asphalt roofing is made of a mixed fiber of polyester fiber and vinylon fiber to form a non-woven fabric. When the non-woven fabric is made, the mesh is formed by coarsely forming a 2 × 2 yarn / cm with a 1000 denier yarn made of polyester fiber. The laminated base material was impregnated and coated with rubber asphalt, and the amount of asphalt shown in Table 1 below, JIS A6
It is an asphalt waterproof sheet having tensile strength and dimensional stability specified in No. 013.

[0026]

[Table 1]

Next, at a position of 100 mm from the inner end face of the overlap margin of the rubber asphalt roofing, a thickness of 0.1 mm is set.
7 mm, width 40 mm, length 100 mm, and made of stainless steel with four corners rounded in an arc shape.
A locking hole having a diameter of 6 mm is drilled at each location, and a substantially rectangular washer whose mechanical strength is increased by bending is applied to the hole, and the pin hole is inserted through the locking pin of the type shown in FIG. The fixing work of driving into the base of the slab was performed. This driving and fixing operation was performed by a washer and a locking pin at intervals of 800 mm along the length direction of the roofing. Also, in the corner of the roof (within 1 m from the corner)
For the overlap margin of the width direction edge of 150 mm width, a washer having a thickness of 0.7 mm, a width of 40 mm, and a length of 200 mm is placed at a position within 100 mm from the end face, and the same concrete pin is passed through the same locking pin as above. The fixing operation was performed by using a washer and a locking pin at an interval of 500 mm in the width direction thereof. Next, the overlap of the sand asphalt roofing formed by exposing the same coated asphalt having a width of 150 mm similar to the above adjacent to the upper surface of the fixed overlap of the sand asphalt roofing thus fixed. When polymerizing and sticking, the back surface of the asphalt coating layer of the overlapping margin is pressed and adhered to the upper surface of the fixed overlapping margin while melting with a torch burner, and the upper and lower overlapping margins have a width of 150 mm. With watertight. In addition, on the upper surface of the widthwise edge near the corner previously fixed, the lower end of a similar rubber asphalt roofing that is entirely melt-adhered to the rising part (vertical wall) of the roof is oriented in the direction of the horizontal floor. The lower end edge was pressed and adhered while the back surface of the coated asphalt on the back surface was melted by a torch burner. The fixing means and the torch burner are applied to each other for the opposing overlap of the rubber asphalt roofing with the overlap margin by the torch burner. The large metal also formed a stable and robust new asphalt waterproofing surface of the present invention without peeling due to strong winds.

Example 2 A 30-mm-thick, 605-mm-wide and 9-cm-long layer was placed on the old asphalt waterproofing layer to be renovated, which was previously installed on the roof of a building.
After laying 10 mm of hard urethane heat insulating plates with their side edges abutting each other, at the intersection of cross-shaped joints formed by abutting the side edges of each heat insulating plate, FIG. 12 and FIG.
As shown in the drawing, a circular washer made of galvanized steel having a thickness of 0.7 mm and a diameter of 80 mm and having a locking pin hole having a diameter of 10 mm at the center thereof is aligned with the hole, and a diameter of 10 m is applied to the pin hole.
An anchor made of galvanized steel having a length of 70 mm, a length of 70 mm, and a head diameter of 16 mm was driven into the base to fix the heat insulating plate.
Thus, such fixing work was repeatedly performed at each intersection, and the entire laying surface of the heat insulating plate was fixed. After that, in the same manner as in Example 1, the rubber asphalt roofing of the present invention was used to fix the overlapping portion with the washer and the locking pin and to apply the melt pressure by the torch burner. The asphalt waterproof construction of the present invention, which is resistant to strong winds and stable, has been completed.

[0029]

As described above, according to the present invention, the base material of the asphalt waterproof sheet is constituted by the laminated base material composed of the nonwoven fabric and the mesh. The asphalt waterproof sheet having a coated asphalt layer suitable for being melted by a torch burner, having a remarkably small mass per unit area of the base material, being lightweight, having a remarkably high tensile strength, and having excellent dimensional stability. not only is obtained, its of
The mass per unit area of the laminate substrate is 100 to 20
0 g / m ^2, and the amount of asphalt to be impregnated and coated is 2800-3500 g / m ^2, and JIS A60
13 tensile strength and 20~30Kgf / cm defined, dimensional because stability 0 to 0.5% or less, only the asphalt waterproof sheet suitable for molten by high torch burner having a coating covering the asphalt content can be surely obtained But not
It is easy to handle, has good workability, has little expansion and contraction after construction, forms a stable and robust waterproof construction layer with no danger of water leakage without any gap around the axis of the locking pin. it can.

In order to form a heat insulating layer by laying a heat insulating plate on an upper surface of a base made of a concrete slab or a base made of an old waterproof sheet applied thereon with its side surfaces facing each other, a side edge of the heat insulating plate is formed. When the locking pin holes of the washer are aligned with the intersections of the cross joints generated by the butting of the slabs, and the locking pins are inserted into the pin holes and driven into the foundation of the concrete slab, four washers are used with one washer. Can be fixed, thereby increasing the working efficiency.

[Brief description of the drawings]

FIG. 1 is a perspective view in which a part of a laminate base material according to an embodiment of the present invention is cut away.

FIG. 2 is a perspective view in which a part of the asphalt waterproof sheet of the present invention using the laminated base material of FIG. 1 as a core is cut off.

FIG. 3 is a comparative graph showing the relationship between the mass per unit area of the nonwoven fabric of the laminated base material and the asphalt waterproof sheet, the nonwoven fabric of the conventional nonwoven fabric substrate and the asphalt waterproof sheet, and the tensile strength.

FIG. 4A is a plan view of an example of a washer used in the present invention.

FIG. 4B is a plan view of another example of the washer used in the present invention.

FIG. 4C is a plan view of still another example of the washer used in the present invention.

FIG. 4 (d) is a side view of the locking pin used in the present invention.

FIG. 5 is a perspective view showing a part of an embodiment of the asphalt waterproofing method according to the present invention.

FIG. 6 is a plan view of a part of FIG. 5;

FIG. 7 is a sectional view taken along line VII-VII of FIG. 6;

FIG. 8 is a sectional view taken along line VIII-VIII of FIG. 6;

FIG. 9 is a longitudinal sectional view of another embodiment of the asphalt waterproofing method of the present invention.

FIG. 10 is a longitudinal sectional view of still another embodiment of the asphalt waterproofing method of the present invention.

FIG. 11 is a longitudinal sectional view of still another embodiment of the asphalt waterproofing method of the present invention.

12 (a) is a partially cutaway top view of the embodiment of FIG. 10 of the asphalt waterproofing method of the present invention. (B) A longitudinal sectional view of FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Laminated base material of this invention 1a Nonwoven fabric 1b mesh 2 Asphalt coating layer 3 Washer 3 'Washer 3 "Washer 4 Locking pin hole 5 Locking pin A Asphalt waterproof sheet of the present invention a Stacking allowance B Concrete slab base A ′ Old waterproof layer C insulation board

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) E04D 5/02 E04D 5/14

Claims (5)

(57) [Claims] 1. A impregnated with asphalt-based waterproofing material on the substrate, in the asphalt waterproof sheet comprising overturned coating, the substrate, in forming the luer scan <br/> Middelfart tarpaulin from the laminate substrate with the non-woven fabric and mesh , weight per unit area of said laminate base material, 100 to 200 g / ^{m 2,} impregnated into the laminate substrate, asphalt-based waterproofing material amount for covering the coating are 2800~3500g / ^{m 2,} JIS a 60
Tensile strength as prescribed in 13 20~30Kgf / cm, features and to luer staple <br/> Aruto tarp that is dimensional stability 0 to 0.5%. 2. The asphalt waterproofing sheet according to claim 1, wherein a plurality of the asphalt waterproofing sheets are prepared and laid on a foundation made of a concrete slab or a foundation made of an old waterproofing sheet to be repaired provided on the upper surface of the concrete slab. A fixing means for applying a washer having a width smaller than the overlapping allowance to the upper surface of the overlapping allowance on one side of the sheet and driving and fixing a pin passing through at least one locking pin hole provided in the washer to the base of the concrete slab. Along the overlapping margin, after arranging at a predetermined interval, the overlapping margin on the other side of the asphalt waterproof sheet adjacent thereto is melted using a torch burner on the back surface, and the above fixed is fixed. Asphalt waterproofing method characterized in that it is pressed and stuck on the upper surface of the overlapping margin. 3. The washer is made of a rib-processed plate having a thickness of 1 mm or less, has a circumference of 225 to 300 mm, and has a locking pin having a pull-out strength of 300 kg / f.
3. The asphalt waterproofing method according to claim ^{2, wherein the number of} used is as follows. 4. A of the lower fabric over the entire surface, laid in a state in which the insulating plates abut one another to form a flat insulating plate laying surface obtained, using the asphalt waterproof sheet according to claim 1 Symbol placement through which 4. The asphalt waterproofing construction according to claim 2 , wherein in the process of performing the waterproofing construction according to claim 2 or 3 , the heat insulating plates are simultaneously fixed by a work of fixing the overlap margin on one side of the asphalt waterproofing sheet. Law. 5. The corner portions of the four heat insulating plates are abutted against each other, a washer straddles the cross-shaped abutting corner portion, and a washer pin hole located at the center of the cross-shaped joint is passed through. The method for waterproofing asphalt according to claim 4, wherein the pin is driven into a concrete substrate and fixed.