JPH11190108A - Asphalt waterproof heat construction method considering environmental conservation - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate fire, fume, odor and burn caused by heating melting work by filling a low fuming/low odorous clean type waterproof work asphalt composition previously heated/melted to an execution work temperature in a heat reserving tank, and performing execution work by transferring the asphalt composition to a work site while holding it at the execution work temperature. SOLUTION: A low fuming/low odorous clean type waterproof work asphalt composition having a softening point of 95 to 110 deg.C, penetration of 20 to 40, a flash point not less than 280 deg.C and 200 deg.C viscosity of 80 to 250 centipoise, is previously heated/melted to a temperature offered to execution work. The asphalt composition is supplied from a supply port 6 by removing an upper cover 5 of a cylindrical heat reserving tank 1 covered with a heat insulating material 2. A controller 9 controls a temperature of molten asphalt in the tank 1 by turning on/off a switch of a heater 3 by data from a temperature measuring apparatus 4. An asphalt waterproof heat construction method is performed by the molten asphalt taken out through a U-shape pipe 7 after transferring the asphalt to a work site while holding it at an execution work temperature.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an asphalt waterproofing thermal method in consideration of environmental protection.

[0002]

[Prior art] The so-called asphalt waterproofing thermal method, in which asphalt is melted at a construction site and multiple layers of asphalt roofing are laminated using the melted asphalt to form a waterproof layer, is currently used in terms of its waterproof reliability. But it occupies the mainstream of waterproofing methods. The most excellent point of this method is that the asphalt is low in viscosity at the time of construction and the fluidity is excellent, so high watertight filling property can be obtained. The advantage is that a highly reliable waterproofing layer can be easily obtained. Therefore, buildings that require a long service life,
Asphalt waterproofing thermal construction methods are used without exception in buildings that require a high degree of waterproofing reliability, such as museums that store exhibits with extremely high historical value.

[0003] The asphalt waterproofing thermal method is an extremely reliable waterproofing method, but has its own problems. Normally, this method is to put asphalt into a melting pan (commonly called a melting pot) capable of dissolving 200 to 400 kg of asphalt, and melt the asphalt to 250 to 300 ° C. with a burner using propane or heavy oil as a heat source.
Next, a required amount of the dissolved asphalt is taken out into a small can which can be carried, and asphalt roofing is adhered while flowing with a ladle to form a waterproof layer. 2
The reason for dissolving at a temperature of 50 to 300 ° C. is that if the temperature is lower than 50 ° C., the asphalt has poor fluidity and hinders waterproofing work. Asphalt is usually waterproof layer 1
Since ³ to 6 kg / m ² is required per m ² , the asphalt melting operation is performed almost all day. However, it has been strongly pointed out that smoke and smell generated when asphalt is melted are disliked by the residents in the vicinity, and a fire accident due to ignition of the asphalt due to overheating or a worker is burned during handling.

[0004] These problems are caused by heating the asphalt to a high temperature near 300 ° C at the construction site. In recent years, one of the solutions is a clean type, which has a low viscosity at high temperatures, is lower than conventional products, can be applied even at temperatures of 200 to 260 ° C, and removes as much as possible components that cause smoke and odor. Asphalt for waterproofing work has been developed and put on the market. In addition, a temperature controller is provided in the melting pot so that the temperature does not exceed a predetermined temperature. However, if the melting temperature is controlled, it naturally goes into an overheated state, and a lot of smoke and odor are generated like the conventional products. In addition, there are many cases where the on-site worker sets the melting temperature above the predetermined melting temperature of the asphalt composition at the construction site so as to be able to dissolve the asphalt in a shorter time, rather than in a hurry at the work site. In many cases, the effect cannot be exhibited even if the controller is provided or the low melting temperature type asphalt composition is used.

As another countermeasure to solve these problems, there is an asphalt waterproofing self-adhesion method. In this method, a self-adhesive layer is provided on asphalt roofing, and a waterproof layer is formed by the self-adhesive layer, and is gradually becoming established in the market. However, this construction method has a major problem in that a large amount of release paper is disposed during construction.

On the other hand, a torch method in which a thick asphalt roofing sheet is roasted and coated with a torch burner and a waterproof layer is formed by sticking the sheet while melting the asphalt layer has also been adopted as a general-purpose method. It requires a high level of construction technology, especially if the torch of the seat joints is insufficient, which leads to immediate water leakage, leaving a great deal of anxiety in that respect. In practice, water leakage accidents occur frequently.

There are many non-asphalt waterproofing methods that do not use asphalt at all, but all have inherent problems. For example, a sheet waterproofing method in which a vulcanized rubber sheet is stuck with an adhesive has difficulty in joint processing of the sheet. That is, since the surface of the vulcanized rubber is in an inactive state, it is very difficult to completely integrate the sheets with an adhesive.

[0008] The urethane coating waterproofing method is also a method that has been adopted very often recently. However, it is difficult to obtain a uniform coating thickness, and a predetermined waterproofing property is obtained only after the reaction curing of the urethane coating is completed. It has a drawback that complete waterproof performance cannot be obtained immediately after construction.

As described above, although the asphalt waterproofing thermal method has a problem, at present, all of the other waterproofing methods have a major problem. In particular, the method is superior to the asphalt waterproofing in terms of waterproofing reliability. There is no. Therefore, there is a long-felt need in the industry for an asphalt waterproofing thermal construction method in which 100% of the cleanliness of waterproof asphalt for waterproofing work is exhibited during construction and there is no fear of fire.

[0010]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a section capable of controlling a predetermined melting temperature without associating a worker at a work site with a work of dissolving an asphalt composition, for a clean type waterproofing work. After melting the asphalt composition, put it in a heat retaining tank equipped with a heating means and a temperature control means, transfer it to a work site in a molten state, and then perform as-construction to heat the asphalt. It is an object of the present invention to provide a clean asphalt waterproofing thermal method that can eliminate problems such as fire, smoke, odor, and burns caused by melting work at once.

[0011]

According to the present invention, a clean type asphalt composition for waterproofing, which has been heated and melted to a temperature to be provided in advance, is filled in a heat retaining tank provided with a heating means and a temperature adjusting means. The present invention relates to an asphalt waterproofing thermal method characterized by transferring the molten asphalt to an asphalt waterproofing thermal method by transferring the molten asphalt to a work site.

One of the clean asphalt compositions for waterproofing is disclosed in Japanese Patent Application Laid-Open No. 7-1 proposed by the present applicant.
No. 96922, and its asphalt composition for waterproofing has a softening point of 95 to 110 ° C. and a penetration of 2
0-40, flash point 280 ° C or higher, viscosity at 200 ° C is 80
~ 250c. p. (Centipoise).

[0013] The waterproofing asphalt composition comprises 2
It is an asphalt composition that has low viscosity even at temperatures of 30 to 260 ° C and has low smoke and low odor properties, and has already achieved many achievements in the asphalt waterproofing thermal method. is there. If the asphalt composition filled in the heat retaining tank at 230 to 260 ° C. is taken out and used, the surrounding environment is not polluted with almost no generation of smoke or odor, and a clean construction environment can be maintained.

[0014] Another one of the clean type waterproofing asphalt composition is described in 1997 Patent Application No. 110320 proposed by the applicant, and the waterproofing asphalt composition has a melting temperature. 150-200 ° C,
Melt viscosity 30 to 2,000 c. p. Having a physical property and / or an odor index of 0 to 300 and a smoke index of 0 to 5, and more preferably a low humidity folding resistance of 0 ° C.
Hereinafter, 0 m at a softening point of 90 ° C. or more and a sag length of 120 ° C. or less
m, about 5 mm at 125.degree. C., and a property of completely flowing down at 130.degree. C. or more.

[0015] The asphalt composition is 150 to 200
It can be installed even at a low temperature of ℃, and is much more clean than the former. The former asphalt has extremely high versatility because it is mass-produced by a petroleum maker.
The asphalt for waterproofing work described in No. 0320 is a product unique to the applicant, and has lower viscosity at high temperatures and improved low-temperature characteristics than the former.

The measurement of the odor index was carried out using an XP-329 general-purpose odor sensor (manufactured by New Cosmos Electric).

The smoke index is measured according to JIS A13
Based on the surface test described in 21 (test method for flame retardancy of building interior materials and construction methods), the amount of smoke was measured using a smoke collection box and a light amount measuring device.

Both the odor index and the smoke index are determined at respective standard working temperatures. The conventional asphalt for waterproofing uses three types of asphalt for waterproofing in Table 4 in the section of petroleum asphalt of JIS K 2207. The standard construction temperature of conventional waterproofing asphalt is 280 ° C, and the standard construction temperature of the clean asphalt of the present invention is 200 ° C. And the odor index of the clean asphalt of the present invention, the value obtained based on the odor index 1000 of the conventional waterproofing asphalt is 0 to 300, preferably 0 to 100,
It is particularly preferably 0 to 50, and the smoke index of the clean asphalt of the present invention is 0 to 0 based on the smoke index of the conventional waterproofing asphalt.
5, preferably 0 to 3, particularly preferably 0 to 1.

The capacity of the heat insulating tank, watertight area varies depending waterproof employed, as long melting asphalt normal 500~1000kg those large enough to fill up thereby usually 200～800M ^2-position Construction is possible. In the case of waterproofing work of a large area, a plurality of such heat retaining tanks may be prepared.

As an example of the structure of the heat retaining tank, Japanese Patent Application Laid-Open
Japanese Patent Application Laid-Open No. -192005 discloses an asphalt melting and heat retaining tank. When the asphalt is taken out from the outlet, it is particularly necessary to take care that a large amount of asphalt does not suddenly flow out. Therefore, in the present invention, for example, as shown in FIG.
If asphalt is taken out through the U-shaped pipe 7 by sending pressurized air into the inside, the asphalt can be safely taken out at a constant outflow speed without sudden discharge.

As a method of filling the heat retaining tank with asphalt, the following (1) to (3) can be exemplified. (1) A method of filling molten asphalt stored in a petroleum maker for waterproofing work into a heat insulation tank and heating it to a predetermined temperature before transporting the asphalt to a construction site [this method is used for asphalt production. When the temperature is about 230-260 ° C
(Because the air heated to this temperature is blown into straight asphalt and oxidized and polymerized to produce asphalt for waterproofing work, there is an advantage that only a little heating is required.) (2) A method of filling a molten tank with asphalt in a molten state from an asphalt stock tank for roofing production by an asphalt roofing maker [this method generally uses an asphalt temperature of 2 for roofing processing.
Since the temperature is about 00 ° C., there is an advantage that it takes a relatively short time to heat the clean type asphalt to a temperature of 200 to 260 ° C.]. (3) At the waterproofing shop, dissolve the asphalt with the asphalt dissolving pot and transfer it to the thermal insulation tank. In this (1),
The method (2) requires less energy cost for heating, and is a more preferable method.

In practicing the present invention, the heat retaining tank is transported to a work site on a car.
(A) Take out the required amount of molten asphalt in the heat retention tank into a small can (equipped with heat retention means as necessary) fixed to a manual motorcycle or the like, and apply asphalt roofing while flowing with a ladle to form a waterproof layer. , (B)
When the work site is a rooftop or the like, transfer the heat retention tank to the rooftop with a crane or the like and carry out the operation (a), or transfer the heat retention tank from the heat retention tank to another heat retention tank provided on the rooftop by a heat retention pipe. Then, a waterproof layer can be formed in the same manner as in the above (a).

[0023]

EXAMPLES The present invention will be described below with reference to examples.
The present invention is not limited thereby.

FIG. 1 shows a heat retaining tank used in this embodiment. Reference numeral 1 denotes a cylindrical heat retaining tank, which is entirely covered with a heat insulating material 2. Reference numeral 3 denotes a heater, and any number of heaters can be used. Reference numeral 4 denotes a temperature measuring device, which is also provided in an arbitrary number. The data obtained from this temperature measuring device is sent to the controller 9, and the heater 3
Is turned on and off to melt the temperature of the molten asphalt in the tank, but is controlled not to overheat above the predetermined melting temperature. The molten asphalt is supplied from the supply port 6 except for the top lid 5. Removal of the molten asphalt is performed through a U-shaped pipe 7. Although taking out with a straight pipe is also conceivable, if adjustment of the valve 8 fails, molten asphalt may erupt. Therefore, it is preferable to take out through a U-shaped pipe. It is preferable to use an insulated valve for the valve.

Example 1 Waterproof asphalt (trade name: Astite M) 10 having the physical properties shown in Table 1 and being heated and melted at 230 ° C.
00 kg was directly charged to the heat retaining tank shown in FIG. 1 without cooling from a production device of a petroleum asphalt maker. The data in the table below was measured for petroleum asphalt J
It was measured according to IS K 2207.

The heat retaining tank was transported by vehicle to a construction site (construction area: 300 m ² ). The molten asphalt filled during this period is heated to 250 ° C by a heater and a controller attached to the heat retention tank, which is suitable for the thermal method.
Was adjusted to

Using a 250 ° C. molten asphalt in a heat retaining tank, a waterproof layer was formed in the following procedure. A perforated asphalt roofing (trade name: free spot) will be installed at the specified location. 1.8 kg / m ² of molten asphalt (trade name: Astite M) was placed on the perforated asphalt roofing.
Stretch roofing while flowing at the rate of
Stick a strong gil). Further, a stretch roofing with sand (Strength Capple (trade name)) is applied thereto while flowing 1.2 kg / m ² of molten asphalt (trade name: Astite M).

Example 2 A waterproofing asphalt composition having the physical properties described in claim 3 was manufactured in a factory according to the following composition. The physical properties are shown in Table 1. SBS 4wt% PE wax 8wt% Straight asphalt 84wt% Other additives 4wt%

Since the asphalt composition for waterproofing is blended at 200 ° C. in a factory, the 50
0 kg was then filled into the heat retaining tank. This heat retaining tank was transferred to a construction site having a construction area of 400 m ² .

A waterproof layer was formed by the following procedure using molten asphalt at 200 ° C. in a heat retaining tank. Application of roofing for self-adhesive partial bonding (trade name Strong Stripe Roofing). On top of that, 1.2 kg / m ^{2 of the} waterproofing asphalt (trade name: Gumtight Clean) from the heat retention tank
Attach the stretch roofing with sand (product name Powerful Caple) while flowing at the ratio of

According to the invention shown in the second embodiment, the amount of asphalt used is less than half and the number of roofing layers is only two compared with the invention shown in the first embodiment. This is an extremely excellent method.

[0032]

[Table 1]

[0033]

[Effect] According to the process of the present invention, (a) low smoke emission of the asphalt composition according to the quality design during construction,
Clean characteristics such as low odor were fully exhibited, and waterproofing work could be performed without generating unpleasant odors or smoke, regardless of the qualities of workers. (B) Melting work with an asphalt melting pot by direct fire was completely unnecessary, and concerns about fire were eliminated. (C) Since there is no work to melt the asphalt in the melting pot, the fuel cost has been reduced.
(D) Since asphalt is not transported to the site in a wrapped form, there is no asphalt wrapping paper, which also reduces costs and does not generate on-site waste such as wrapping paper.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing one example of a heat retaining tank provided with a heating means and a temperature adjusting means used in the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Insulation tank 2 Insulation material 3 Heater 4 Temperature measuring device 5 Top cover 6 Supply port 7 U-shaped pipe 8 Valve 9 Controller 10 Wheel 11 Hanging tool

Continuation of front page (72) Inventor Takefumi Kinoshita 1-3-1 Kodai, Adachi-ku, Tokyo Inside Tajima Roofing Co., Ltd.

Claims (5)

[Claims] 1. A low-smoke, low-odor, clean-type asphalt composition for waterproofing work, which is heated and melted in advance to a temperature to be used for construction, is charged into a heat-retaining tank provided with heating means and temperature control means, and The asphalt waterproofing thermal method characterized in that it is transferred to a work site while maintaining the temperature to be provided, and the asphalt waterproofing thermal method is performed with the molten asphalt. 2. The low-smoke, low-odor clean asphalt composition for waterproofing construction according to claim 2, wherein the softening point is 95 to 11.
0 ° C, penetration 20-40, flash point 280 ° C or higher, 200
℃ 80-250 c. p. (Centipoise). 3. The low-smoke, low-odor clean type asphalt composition for waterproofing work, which has a melting temperature of 150-150.
200 ° C., melt viscosity 30-2,000 c. p. The asphalt waterproofing thermal method according to claim 1, wherein 4. The asphalt waterproofing thermal method according to claim 3, wherein the asphalt composition for waterproofing according to claim 3 has an odor index of 0 to 300 and a smoke index of 0 to 5. 5. The asphalt composition for waterproofing work according to claim 3, wherein the low humidity folding resistance is 0 ° C. or less, the softening point is 90 ° C. or more, and the sagging length is 120 ° C. or less, 0 mm;
The asphalt waterproofing thermal method according to claim 3 or 4, which is in a completely flowing state at a temperature of at least ℃.