Cold-laminate asphalt waterproofing construction method, cold-laminate asphalt waterproofing construction system

Abstract

This invention provides a room-temperature laminated asphalt waterproofing method and a room-temperature laminated asphalt waterproofing system that can improve the application speed of the one-component moisture-curing waterproofing material in a room-temperature laminated asphalt waterproofing method that combines a one-component moisture-curing waterproofing material with asphalt roofing. [Solution] A room-temperature laminated asphalt waterproofing method using a one-component moisture-curing waterproofing material mainly composed of modified silicone, comprising a spraying step of spraying the one-component moisture-curing waterproofing material in mist form toward an object using a coating machine.

Description

[Technical Field]

[0001] The present invention relates to a cold-temperature laminated asphalt waterproofing method and a cold-temperature laminated asphalt waterproofing system. [Background technology]

[0002] Traditionally, a laminated construction method using asphalt roofing materials and waterproofing asphalt has been widely used for waterproofing roofs and other surfaces of buildings. However, this conventional laminated method requires the waterproofing asphalt to be cured at high temperatures, resulting in problems such as odor and smoke generation during the melting of the waterproofing asphalt. Therefore, as a solution to these problems, a laminated construction method using asphalt roofing materials with a one-component moisture-curing waterproofing material that can be applied and cured at room temperature is becoming increasingly popular.

[0003] However, applying one-component moisture-curing waterproofing materials often involves using brushes or trowels, requiring workers to work in a bent-over position, which places a heavy burden on them. Furthermore, one-component moisture-curing waterproofing materials are generally applied with notched brushes to control the amount applied. As a result, the coating film made of one-component moisture-curing waterproofing material applied to a building develops streaky irregularities along the direction of application. Therefore, when applying asphalt roofing over the coating film, thorough compaction is necessary to ensure good adhesion between the coating film and the asphalt roofing. In addition, in conventional laminated construction methods, one-component moisture-curing waterproofing materials are laminated between layers of asphalt roofing. As a result, it is difficult for the one-component moisture-curing waterproofing material to absorb the moisture from the air necessary for curing, and it takes a long time to cure.

[0004] Methods for accelerating the curing of one-component moisture-curing waterproofing materials include, for example, a method using a curing accelerator (see, for example, Patent Document 1), a method of curing a one-component moisture-curing adhesive in the presence of an inorganic compound containing crystalline water (see, for example, Patent Document 2), a method of applying or spraying a water-containing surface coating agent onto the surface of a moisture-curing sealant or waterproofing material before curing the material (see, for example, Patent Document 3), and a method of bonding two adherends with a moisture-curing adhesive, in which the moisture-curing adhesive is applied to at least one bonding surface, and a water-containing curing accelerator is sprayed onto at least one bonding surface, and the two bonding surfaces are joined (see, for example, Patent Document 4). [Prior art documents] [Patent Documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 5-320596 [Patent Document 2] Japanese Patent Application Publication No. 11-92729 [Patent Document 3] Patent No. 6040646 [Patent Document 4] Japanese Patent Application Publication No. 6-17010 [Overview of the Initiative] [Problems that the invention aims to solve]

[0006] However, the inventions described in Patent Documents 1 and 2 lose the advantage of not requiring mixing and stirring, which is a characteristic of one-component moisture-curing adhesives, and thus reduce work efficiency. Furthermore, in the inventions described in Patent Documents 3 and 4, when asphalt roofing is laminated onto the moisture-curing adhesive, excess moisture may remain between the layers of asphalt roofing, causing defects such as blistering after construction, or the water between the materials may hinder adhesion to the asphalt roofing. In addition, the inventions described in Patent Documents 3 and 4 require an additional step of spraying a surface coating agent containing water or a water-containing curing accelerator, which slows down the construction speed.

[0007] The present invention has been made in view of the above circumstances, and in a normal-temperature laminated asphalt waterproofing construction method combining a one-component moisture-curing waterproof material and asphalt roofing, it aims to provide a normal-temperature laminated asphalt waterproofing construction method capable of improving the construction speed of the one-component moisture-curing waterproof material, and a normal-temperature laminated asphalt waterproofing construction system.

Means for Solving the Problems

[0008] In order to solve the above problems, the present invention has the following aspects. [1] A normal-temperature laminated asphalt waterproofing construction method using a one-component moisture-curing waterproof material containing modified silicone as a main component, having a spraying step of spraying the atomized one-component moisture-curing waterproof material toward an object by a coating machine. [2] The spraying step in the normal-temperature laminated asphalt waterproofing construction method according to [1], which is a step of spraying the atomized one-component moisture-curing waterproof material from the coating machine in an environment with a humidity of 50% or more. [3] The spraying step in the normal-temperature laminated asphalt waterproofing construction method according to [1], which is a step of spraying onto the object while mixing the atomized one-component moisture-curing waterproof material sprayed from the coating machine and atomized water supplied in a different system from the one-component moisture-curing waterproof material. [4] The average particle diameter of the atomized water in the normal-temperature laminated asphalt waterproofing construction method according to [3] is 50 μm or less. [5] A normal-temperature laminated asphalt waterproofing construction system including a coating machine and a mist generator that generates atomized water with an average particle diameter of 50 μm or less, spraying onto an object while mixing the atomized one-component moisture-curing waterproof material sprayed from the coating machine and the atomized water supplied from the mist generator.

Effects of the Invention

[0009] According to the present invention, in a normal temperature laminated asphalt waterproofing construction method combining a one-component moisture-curing waterproof material and asphalt roofing, a normal temperature laminated asphalt waterproofing construction method capable of improving the construction speed of the one-component moisture-curing waterproof material, and a normal temperature laminated asphalt waterproofing construction system can be provided.

Brief Description of the Drawings

[0010] [Figure 1] It is a perspective view showing a normal temperature laminated asphalt waterproofing construction method according to an embodiment of the present invention. [Figure 2] It is a schematic diagram showing a normal temperature laminated asphalt waterproofing construction system according to an embodiment of the present invention. [Figure 3] It is a perspective view showing an exposed waterproofing example by a normal temperature laminated asphalt waterproofing construction method according to an embodiment of the present invention. [Figure 4] It is a perspective view showing a vertical surface waterproofing example by a normal temperature laminated asphalt waterproofing construction method according to an embodiment of the present invention. [Figure 5] It is a plan view showing a sample for measuring the adhesion force development time used for evaluating the adhesion force development time in Examples and Comparative Examples. [Figure 6] It is a side view showing a sample for measuring the adhesion force development time used for evaluating the adhesion force development time in Examples and Comparative Examples.

Modes for Carrying Out the Invention

[0011] Embodiments of the normal temperature laminated asphalt waterproofing construction method and the normal temperature laminated asphalt waterproofing construction system of the present invention will be described. Note that this embodiment is specifically described to better understand the gist of the invention, and does not limit the present invention unless otherwise specified.

[0012] [Normal Temperature Laminated Asphalt Waterproofing Construction Method] A room-temperature laminated asphalt waterproofing method according to one embodiment of the present invention is a room-temperature laminated asphalt waterproofing method using a one-component moisture-curing waterproofing material mainly composed of modified silicone, and comprises a spraying step of spraying the one-component moisture-curing waterproofing material in mist form toward an object using a coating machine.

[0013] Figure 1 is a perspective view showing the room-temperature laminated asphalt waterproofing method of this embodiment. The details of the room-temperature laminated asphalt waterproofing method of this embodiment will be described below with reference to Figure 1.

[0014] "Step A1" As shown in Figure 1, the room-temperature laminated asphalt waterproofing method of this embodiment includes a step (Step A1) in which a one-component moisture-curing waterproofing material mainly composed of modified silicone is applied to the coated surface (top surface in Figure 1) 1a of the substrate 1, which is the object to be worked on, using a coating machine. Step A1 forms a one-component moisture-curing waterproofing material 2 on the coated surface 1a of the substrate 1. Step A1 is a spraying step.

[0015] In this embodiment, "room temperature" refers to a temperature range of 5°C to 40°C.

[0016] Examples of substrate 1 include concrete and pre-installed asphalt roofing. The coating surface 1a of substrate 1 is a horizontal surface.

[0017] For painting equipment, either an air-powered paint sprayer or an airless paint sprayer can be used.

[0018] The painting machine is equipped with a spray gun having a hose and nozzle for spraying (discharging) a one-component moisture-curing waterproofing material 2. An extension nozzle can be attached to the spray gun.

[0019] An air-powered painting machine is a painting machine that uses a pump to deliver a one-component moisture-curing waterproofing material 2, and then sprays the material 2 by atomizing it with compressed air at the tip of the nozzle.

[0020] An airless spray painter is a type of spray paint that applies high pressure to a one-component moisture-curing waterproofing material 2 and sprays the material 2 in a mist form onto the target object from a spray gun. Airless spray painters come in three main types: pneumatic plunger type (powered by compressed air), electric plunger type (powered by electricity), and gasoline engine plunger type. While pneumatic plunger-type airless sprayers can produce a large volume of the one-component moisture-curing waterproofing material 2, they require a high-capacity compressor. Electric plunger-type airless sprayers have a discharge capacity of approximately 3 liters / minute and are easily driven by a 100V power supply. Gasoline engine plunger-type airless sprayers use engine power to drive the plunger pump, allowing them to be used in locations where electricity is unavailable. The pneumatic plunger type, electric plunger type, and gasoline engine plunger type are selected based on the scale and equipment of the waterproofing application area.

[0021] Unlike air-type painters, airless painters apply high pressure to the one-component moisture-curing waterproofing material 2 using a pump and spray it in a mist, thus reducing the scattering of the material. Furthermore, by spraying the one-component moisture-curing waterproofing material 2 in a mist form at high pressure from the nozzle of the spray gun, airless painters can form a one-component moisture-curing waterproofing material 2 with a uniform thickness.

[0022] In other words, while both air-powered and airless sprayers can be used to spray the one-component moisture-curing waterproofing material 2, an electric or engine-driven airless sprayer is preferred due to its minimal overspray and the fact that it does not require a large compressor.

[0023] The one-component moisture-curing waterproofing material 2 includes a modified silicone as the main component, a filler, a plasticizer, asphalt, and a dehydrating agent. The one-component moisture-curing waterproofing material 2 is used in which the above components are stirred and mixed in a mixer and stored in a container.

[0024] Modified silicone is a compound having a main backbone structure such as polyether polyol, polyester polyol, acrylic polyol, or polycarbonate polyol, and having hydrolyzable silyl groups in the main chain or side chains. Modified silicone undergoes polymerization when the alkoxy groups of the hydrolyzable silyl groups are hydrolyzed by moisture in the air, and the resulting silanol groups condense. This causes the one-component moisture-curing waterproofing material 2 to harden.

[0025] The viscosity of the one-component moisture-curing waterproofing material 2 is preferably 3,000 mPa·s or more and 15,000 mPa·s or less, more preferably 4,000 mPa·s or more and 12,000 mPa·s or less, and even more preferably 5,000 mPa·s or more and 10,000 mPa·s or less. If the viscosity of the one-component moisture-curing waterproofing material 2 is below the lower limit, it will be highly fluid, and problems such as sagging will easily occur. If the viscosity of the one-component moisture-curing waterproofing material 2 exceeds the upper limit, the resistance in the hose of the painting machine will increase, and it may become impossible to feed the one-component moisture-curing waterproofing material 2.

[0026] The viscosity of the one-component moisture-curing waterproofing material 2 may be adjusted by mixing a diluent into the one-component moisture-curing waterproofing material 2, or by controlling the molecular weight of the modified silicone, which is the main component of the one-component moisture-curing waterproofing material 2. As a diluent, for example, naphthenic synthetic hydrocarbons can be used.

[0027] The viscosity of the one-component moisture-curing waterproofing material 2 can be measured using a rotational viscometer.

[0028] The amount of one-component moisture-curing waterproofing material 2 to be applied to the coated surface 1a of the substrate 1 is 500 g / m². 2 More than 2500g / m 2 Preferably, it is 1000g / m² 2 More than 2000g / m 2 It is more preferable that the following conditions apply: 1200 g / m² 2 More than 1500g / m 2The following is even more preferable: If the amount of one-component moisture-curing waterproofing material 2 applied is less than the lower limit, it may not adhere sufficiently to the asphalt roofing that is laid on top of the one-component moisture-curing waterproofing material 2. If the amount of one-component moisture-curing waterproofing material 2 applied exceeds the upper limit, a large amount of the one-component moisture-curing waterproofing material 2 will spill out from under the asphalt roofing, which may increase material loss.

[0029] The pressure at which the atomized one-component moisture-curing waterproofing material 2 is sprayed (discharged) from the nozzle of the spray gun equipped on the painting machine is preferably 5,000 kPa or more and 15,000 kPa or less, more preferably 6,000 kPa or more and 13,000 kPa or less, and even more preferably 7,000 kPa or more and 11,000 kPa or less. If the pressure is below the lower limit, the discharged one-component moisture-curing waterproofing material 2 may not be in a uniform atomized form, resulting in an uneven coating surface. If the pressure exceeds the upper limit, the amount of one-component moisture-curing waterproofing material 2 scattered will increase, potentially leading to increased loss and a wider scattering range.

[0030] Step A1 (Spraying Step) is preferably a step in which a mist of one-component moisture-curing waterproofing material 2 is sprayed from a painting machine in an environment with a humidity of 50% or higher. By spraying the mist of one-component moisture-curing waterproofing material 2 from a painting machine in an environment with a humidity of 50% or higher, the mist of one-component moisture-curing waterproofing material 2 sprayed from the painting machine comes into contact with air, causing the one-component moisture-curing waterproofing material 2 to react with moisture in the air and accelerating the curing of the one-component moisture-curing waterproofing material 2. Furthermore, although the reaction between the one-component moisture-curing waterproofing material 2 and moisture in the air progresses upon contact with air, it is preferable that the mist of one-component moisture-curing waterproofing material 2 that has come into contact with air reaches the coated surface 1a of the substrate 1 before this reaction is completed.

[0031] When the mist-like, one-component moisture-curing waterproofing material 2 is brought into contact with air, it is preferable that the humidity of the air in which the mist-like, one-component moisture-curing waterproofing material 2 comes into contact is 50% or higher. If the humidity of the air is less than 50%, the moisture in the air alone will not be sufficient to accelerate the curing process.

[0032] Because the amount of moisture in the air is greatly affected by climate fluctuations, especially during dry, low-temperature winter conditions, even if the one-component moisture-curing waterproofing material 2 is brought into contact with air, as described above, the curing speed of the one-component moisture-curing waterproofing material 2 will not reach the expected speed. Therefore, it is preferable that step A1 (spraying step) is a step in which the atomized one-component moisture-curing waterproofing material 2 sprayed from a painting machine is mixed with atomized water supplied from a separate system from the one-component moisture-curing waterproofing material 2, and the mixture of the one-component moisture-curing waterproofing material 2 and water is sprayed onto the target object. This brings the particles of the atomized one-component moisture-curing waterproofing material 2 sprayed from the painting machine into contact with the atomized water supplied from a separate system from the one-component moisture-curing waterproofing material 2, causing the one-component moisture-curing waterproofing material 2 to react with the atomized water and promoting the curing of the one-component moisture-curing waterproofing material 2. In step A1, the mist-like one-component moisture-curing waterproofing material 2 sprayed from the painting machine is brought into contact with mist-like water before reaching (contacting) the coated surface 1a of the substrate 1. Specifically, for example, the room-temperature laminated asphalt waterproofing construction system 100 shown in Figure 2 is used to bring the mist-like one-component moisture-curing waterproofing material 220 into contact with mist-like water. As shown in Figure 2, the room-temperature laminated asphalt waterproofing construction system 100 includes a painting machine 110 and a mist generator 120. Details of the room-temperature laminated asphalt waterproofing construction system 100 will be described later. As shown in Figure 2, the mist-like one-component moisture-curing waterproofing material 220 sprayed from the painting machine 110 is passed through the space α where mist-like water 210 sprayed from the mist generator 120 is scattered, in the direction of arrow β, to bring the mist-like one-component moisture-curing waterproofing material 220 into contact with the mist-like water 210. This method makes it possible to improve the curing speed of the one-component moisture-curing waterproofing material 220, even in dry, low-temperature conditions during winter.

[0033] The average particle size of the mist-like water is preferably 50 μm or less, more preferably 30 μm or less, and even more preferably 16 μm or less. When the average particle size of the mist-like water is below the above upper limit, the water particles evaporate before they fall, so they do not wet the substrate or surrounding area, and are less likely to become excessive moisture that can cause blistering.

[0034] The average particle size of mist-like water can be measured by immersion or laser diffraction methods.

[0035] "A2 process" As shown in Figure 1, the room-temperature laminated asphalt waterproofing construction method of this embodiment includes the step of applying asphalt roofing 3 to the coated surface (upper surface in Figure 1) 2a of the one-component moisture-curing waterproofing material 2 (step A2).

[0036] The asphalt roofing 3 is applied before the surface 2a coated with the one-component moisture-curing waterproofing material 2 hardens. If there are wrinkles or lifting in the applied asphalt roofing 3, lightly compact it with a roller or the like.

[0037] Asphalt roofing 3 is not particularly limited, and various commercially available asphalt roofing materials can be used. For example, Presto 15 (manufactured by Nisshin Kogyo Co., Ltd.) can be used.

[0038] "Step A3 process" As shown in Figure 1, the room-temperature laminated asphalt waterproofing construction method of this embodiment includes a step (step A3) of applying the one-component moisture-curing waterproofing material 4 to the coated surface (top surface in Figure 1) 3a of the asphalt roofing 3 using a coating machine. Step A3 forms the one-component moisture-curing waterproofing material 4 on the coated surface 3a of the asphalt roofing 3. Step A3 is a spraying step.

[0039] In step A3, the same one-component moisture-curing waterproofing material as in step A1 is used to form the one-component moisture-curing waterproofing material 4.

[0040] In step A3, a one-component moisture-curing waterproofing material 4 is formed using a coating machine, similar to step A1.

[0041] The amount of one-component moisture-curing waterproofing material 4 applied to the coated surface 3a of the asphalt roofing 3 is 1000 g / m². 2 Preferably, it should be 1200 g / m² or more. 2It is more preferable that the above conditions are met. If the amount of one-component moisture-curing waterproofing material 4 applied is less than the lower limit, sand and other materials on the surface of the asphalt roofing 3 may be exposed, and a uniform coating may not be obtained. There is no problem if the amount of one-component moisture-curing waterproofing material 4 applied is too much, but from a material cost perspective, it is desirable to be close to the lower limit.

[0042] The thickness of the one-component moisture-curing waterproofing material 4 is preferably 700 μm or more, and more preferably 850 μm or more. If the thickness of the one-component moisture-curing waterproofing material 4 is less than the lower limit, sand and other materials on the surface of the asphalt roofing 3 may be exposed, and a uniform coating may not be obtained. There is no problem if the thickness of the one-component moisture-curing waterproofing material 4 is larger, but it is desirable to be close to the lower limit from a material cost perspective.

[0043] Steps A1, A2, and A3 allow for the formation of the waterproof structure 10 shown in Figure 1.

[0044] According to the room-temperature laminated asphalt waterproofing method of this embodiment, by attaching an extension nozzle to the spray gun equipped on the painting machine, the worker can apply the one-component moisture-curing waterproofing material 2 and the one-component moisture-curing waterproofing material 4 while standing, thereby improving work efficiency. Furthermore, since the painting machine can apply the one-component moisture-curing waterproofing material 2 and the one-component moisture-curing waterproofing material 4 in a mist form to the target object, it is possible to form the one-component moisture-curing waterproofing material 2 and the one-component moisture-curing waterproofing material 4 with a uniform thickness. As a result, the adhesion between the one-component moisture-curing waterproofing material 2 and the one-component moisture-curing waterproofing material 4 and the asphalt roofing 3 is excellent, and the compaction work of the asphalt roofing 3 can be performed easily. Consequently, the application speed of the one-component moisture-curing waterproofing material 2 and the one-component moisture-curing waterproofing material 4 can be improved.

[0045] In addition, in the room-temperature laminated asphalt waterproofing method of this embodiment, a base material made of woven fabric, nonwoven fabric, etc. may be placed between the one-component moisture-curing waterproofing material 2 and the asphalt roofing 3, between the one-component moisture-curing waterproofing material 4 and the asphalt roofing 3, or instead of the asphalt roofing 3.

[0046] [Room Temperature Laminated Asphalt Waterproofing System] Figure 2 is a schematic diagram showing a room-temperature laminated asphalt waterproofing construction system according to one embodiment of the present invention. As shown in Figure 2, the room-temperature laminated asphalt waterproofing construction system 100 includes a painting machine 110 and a mist generator 120.

[0047] As described above, the painting machine 110 is not particularly limited as long as it is a painting machine capable of spraying the one-component moisture-curing waterproofing material 220 in a mist-like form onto an object from a spray gun.

[0048] The mist generator 120 is not particularly limited as long as it is capable of spraying mist-like water 210 with an average particle size of 50 μm or less, but for example, a mist generator or the like can be used.

[0049] In the room-temperature laminated asphalt waterproofing system 100 of this embodiment, a mist of one-component moisture-curing waterproofing material 220 sprayed from a coating machine 110 is mixed with mist of water 210 supplied from a mist generator 120, and the mixture of the one-component moisture-curing waterproofing material 220 and the mist of water 210 is sprayed onto the target object. Specifically, for example, first, mist of water 210 is sprayed from the mist generator 120 to form a space α in which the mist of water 210 is dispersed. Next, mist of one-component moisture-curing waterproofing material 220 is sprayed from the coating machine 110 in the direction of arrow β, causing the mist of one-component moisture-curing waterproofing material 220 to pass through space α in the direction of arrow β. As the mist-like, one-component moisture-curing waterproofing material 220 passes through space α, it comes into contact with the mist-like water 210, mixing with the water to form a mixture of the one-component moisture-curing waterproofing material 220 and the water. This reaction between the mist-like, one-component moisture-curing waterproofing material 220 and the water 210 accelerates the curing of the one-component moisture-curing waterproofing material. This mixture of the one-component moisture-curing waterproofing material 220 and the water 210 is then sprayed onto the object.

[0050] According to the room-temperature laminated asphalt waterproofing construction system 100 of this embodiment, by bringing the mist-like one-component moisture-curing waterproofing material 220 into contact with mist-like water 210, the curing speed of the one-component moisture-curing waterproofing material can be improved even in dry, low-temperature conditions during winter.

[0051] <Other Embodiments> However, the present invention is not limited to the embodiments described above.

[0052] For example, the cold-temperature laminated asphalt waterproofing construction method shown in Figure 3 (exposed waterproofing example) and Figure 4 (vertical waterproofing example) may be adopted. In the cold-temperature laminated asphalt waterproofing construction method shown in Figure 3 (exposed waterproofing example) and Figure 4 (vertical waterproofing example), the same reference numerals are used for parts that are the same as those in the above embodiments, and their descriptions are omitted; only the differences are described.

[0053] (exposed waterproof example) "Step B1 process" As shown in Figure 3, the cold-laminate asphalt waterproofing method for exposed waterproofing includes a step (step B1) of applying asphalt roofing 21 with a partial adhesive layer to the surface 1a of the substrate 1. The surface 1a of the substrate 1 is a horizontal surface.

[0054] As the partially adhesive layered asphalt roofing 21, one can be used that has a base material 21A and an adhesive layer 21B partially provided on the surface of the base material 21A that is in contact with the surface 1a of the substrate 1.

[0055] As the asphalt roofing 21 with a partial adhesive layer, for example, Presto S (manufactured by Nisshin Kogyo Co., Ltd.) can be used.

[0056] The surface 1a of the substrate 1 is treated with a primer or the like as needed, and the partially adhesive asphalt roofing 21 is compacted with a roller or the like after it is applied.

[0057] "Step B2 process" As shown in Fig. 3, the normal temperature laminated asphalt waterproofing construction method for the exposed waterproofing example has a step (Step B2) of applying the one-component moisture-curing waterproofing material to the coating surface 21a of the asphalt roofing 21 with a partial adhesive layer, which is the object, by a painting machine. By Step B2, a one-component moisture-curing waterproofing material 22 is formed on the coating surface 21a of the asphalt roofing 21 with a partial adhesive layer. The method for forming the one-component moisture-curing waterproofing material 22 is the same as the method for forming the one-component moisture-curing waterproofing material in the above-described embodiment. Step B2 is a spraying step.

[0058] The application amount of the one-component moisture-curing waterproofing material 22 to the coating surface 21a of the asphalt roofing 21 with an adhesive layer is 500 g / m 2 or more and 2500 g / m 2 or less, preferably 1000 g / m 2 or more and 2000 g / m 2 or less, more preferably 1200 g / m 2 or more and 1500 g / m 2 or less. If the application amount of the one-component moisture-curing waterproofing material 22 is less than the lower limit value, it may not adhere sufficiently to the asphalt roofing 21 to be pasted on the one-component moisture-curing waterproofing material 22. If the application amount of the one-component moisture-curing waterproofing material 22 exceeds the upper limit value, a very large amount of the one-component moisture-curing waterproofing material 22 that protrudes from the asphalt roofing 21 may occur, and the loss of materials may increase.

[0059] "Step B3" As shown in Fig. 3, the normal temperature laminated asphalt waterproofing construction method for the exposed waterproofing example has a step (Step B3) of pasting the asphalt roofing 23 with sand on the coating surface 22a of the one-component moisture-curing waterproofing material 22.

[0060] The asphalt roofing 23 with sand is pasted before the coating surface 22a of the one-component moisture-curing waterproofing material 22 hardens. If there are wrinkles or lifting in the pasted asphalt roofing 23 with sand, simple rolling is performed with a roller or the like.

[0061] The sand-coated asphalt roofing 23 is not particularly limited, and various commercially available sand-coated asphalt roofing materials can be used. For example, Presto Cap K (manufactured by Nisshin Kogyo Co., Ltd.) can be used.

[0062] "Step B4" As shown in Figure 3, the cold-laminate asphalt waterproofing method for exposed waterproofing may include a step (step B4) in which a protective coating is applied to the coated surface 23a of the sand-coated asphalt roofing 23 using a roller brush or the like, if necessary. Step B4 forms a protective layer 24 on the coated surface 23a of the sand-coated asphalt roofing 23. The amount of protective coating applied should be the value specified by each manufacturer.

[0063] Steps B1, B2, B3, and B4 allow for the formation of the waterproof structure 20 shown in Figure 3.

[0064] According to the room-temperature laminated asphalt waterproofing method for exposed waterproofing examples, the application speed of the one-component moisture-curing waterproofing material can be improved, similar to the room-temperature laminated asphalt waterproofing method of the above-described embodiment.

[0065] (Example of vertical waterproofing) "Step C1" As shown in Figure 4, the room-temperature laminated asphalt waterproofing method for the vertical waterproofing example includes a step (step C1) of applying the one-component moisture-curing waterproofing material to the coated surface 1a of the substrate 1, which is the object to be waterproofed, using a spraying machine. Step C1 forms the one-component moisture-curing waterproofing material 31 on the coated surface 1a of the substrate 1. The method for forming the one-component moisture-curing waterproofing material 31 is the same as the method for forming the one-component moisture-curing waterproofing material 2 in the above-described embodiment. The coated surface 1a of the substrate 1 is a vertical surface. Step C1 is a spraying step.

[0066] The amount of one-component moisture-curing waterproofing material 31 applied to the coated surface 1a of the substrate 1 is 500 g / m². 2 More than 3000g / m 2 Preferably, it is 750 g / m². 2More than 2800g / m 2 It is more preferable that the following conditions apply: 1000 g / m² 2 More than 2500g / m 2 The following is even more preferable: If the amount of one-component moisture-curing waterproofing material 31 applied is less than the lower limit, the substrate 32 to be attached in the next step may not be sufficiently impregnated, resulting in voids. If the amount of one-component moisture-curing waterproofing material 31 applied exceeds the upper limit, the excess material may accumulate on the flat surface.

[0067] "C2 process" As shown in Figure 4, the room-temperature laminated asphalt waterproofing method for the vertical waterproofing example includes a step (step C2) of attaching a base material 32 to the coated surface 31a of the one-component moisture-curing waterproofing material 31.

[0068] The substrate 32 is attached before the coated surface 31a of the one-component moisture-curing waterproofing material 31 hardens. If there is insufficient penetration into the attached substrate 32, or if wrinkles or lifting occur, corrections can be made by simply compacting it with a brush, trowel, or roller.

[0069] For the base material 32, for example, woven fabric, nonwoven fabric, etc., can be used.

[0070] The thickness of the substrate 32 is preferably 100 μm or more and 3000 μm or less, more preferably 300 μm or more and 2500 μm or less, and even more preferably 500 μm or more and 2000 μm or less. If the thickness of the substrate 32 is less than the lower limit, the applied one-component moisture-curing waterproofing material 31 will hardly penetrate into the substrate 32, and there is a risk that the excess one-component moisture-curing waterproofing material will drip. If the thickness of the sand-coated substrate 32 exceeds the upper limit, the one-component moisture-curing waterproofing material 31 may not completely penetrate into the interior of the substrate 32.

[0071] "C3 process" As shown in Figure 4, the room-temperature laminated asphalt waterproofing method for the vertical waterproofing example includes a step (step C3) of applying the one-component moisture-curing waterproofing material 33 to the coated surface 32a of the substrate 32, which is the object to be waterproofed, using a coating machine. Step C3 forms the one-component moisture-curing waterproofing material 33 on the coated surface 32a of the substrate 32. The method for forming the one-component moisture-curing waterproofing material 33 is the same as the method for forming the one-component moisture-curing waterproofing material 2 in the above-described embodiment. Step C3 is a spraying step.

[0072] The amount of one-component moisture-curing waterproofing material 33 applied to the coated surface 32a of the substrate 32 is 100 g / m². 2 More than 2500g / m 2 Preferably, it is 200 g / m². 2 More than 2000g / m 2 It is more preferable that the following conditions apply: 300 g / m² 2 More than 1500g / m 2 The following is even more preferable: If the amount of one-component moisture-curing waterproofing material 33 applied is less than the lower limit, a sufficient thickness as a waterproof layer may not be secured. If the amount of one-component moisture-curing waterproofing material 33 applied exceeds the upper limit, sagging may occur, and a waterproof layer of uniform thickness may not be formed.

[0073] Furthermore, the sum of the amount of one-component moisture-curing waterproofing material 33 applied to the coated surface 1a of the substrate 1 in step C1 and the amount of one-component moisture-curing waterproofing material 33 applied to the coated surface 32a of the base material 32 in step C3 is 1000 g / m². 2 More than 5500g / m 2 Preferably, it is 1500g / m² 2 More than 4800g / m 2 It is more preferable that the following conditions apply: 2000 g / m² 2 More than 4000g / m 2 The following is even more preferable: If the total amount of one-component moisture-curing waterproofing material 33 applied is less than the lower limit, sufficient waterproofing performance and strength may not be obtained. While there is no problem if the total amount of one-component moisture-curing waterproofing material 33 applied is large, it is desirable to be close to the lower limit from a material cost perspective.

[0074] Steps C1, C2, and C3 allow for the formation of the waterproof structure 30 shown in Figure 4. The thickness of the waterproof structure 30 is preferably 700 μm or more, more preferably 1000 μm or more, and even more preferably 1500 μm or more. If the thickness of the waterproof structure 30 is less than the lower limit, sufficient waterproof performance and strength may not be obtained.

[0075] According to the room-temperature laminated asphalt waterproofing method of the vertical waterproofing example, the application speed of the one-component moisture-curing waterproofing material 31 and the one-component moisture-curing waterproofing material 33 can be improved, similar to the room-temperature laminated asphalt waterproofing method of the above-described embodiment. Furthermore, according to the room-temperature laminated asphalt waterproofing method of the vertical waterproofing example, by attaching the base material 32 to the coated surface 31a of the one-component moisture-curing waterproofing material 31, the one-component moisture-curing waterproofing material 31 penetrates into the base material 32, so that even if the application surface of the one-component moisture-curing waterproofing material 31 is a vertical surface, the one-component moisture-curing waterproofing material 33 can be formed to a uniform thickness.

[0076] The vertical surfaces can also be left exposed with a protective coating. In this case, the protective coating is applied to the coated surface 33a of the one-component moisture-curing waterproofing material 33 using a roller brush or the like. The amount of protective coating to be applied shall be the value specified by each manufacturer. [Examples]

[0077] The present invention will be described in more detail below with reference to examples, but the present invention is not limited to the following examples.

[0078] [Example 1] Asphalt waterproofing was applied to the base. Modified asphalt roofing (product name: Presto S, manufactured by Nisshin Kogyo Co., Ltd., 1m wide, 2m long) was used as the test substrate. An airless sprayer (product name: MARK-V XT, manufactured by Graco) was used to apply a one-component moisture-curing waterproofing material (product name: Prestocoat, manufactured by Nisshin Kogyo Co., Ltd.) to one surface of the test substrate. The one-component moisture-curing waterproofing material used had a viscosity adjusted to approximately 8000 mPa·s. The amount of one-component moisture-curing waterproofing material applied to one surface of the test substrate was 1000g / m². 2 More than 1500g / m 2 The following was chosen: The pressure at which the one-component moisture-curing waterproofing material was discharged from the airless sprayer onto one surface of the test substrate was set to between 9,000 kPa and 10,000 kPa. The average discharge rate of the one-component moisture-curing waterproofing material from the airless sprayer to one surface of the test substrate was set to 3.0 kg / min. Table 1 shows the temperature and humidity when applying a one-component moisture-curing waterproofing material to one surface of the test substrate. Immediately after applying a one-component moisture-curing waterproofing agent to one surface of the test substrate, modified asphalt roofing (product name: Presto 15, manufactured by Nisshin Kogyo Co., Ltd., 300mm square) was bonded to the other surface of the test substrate via the one-component moisture-curing waterproofing agent.

[0079] [Examples 2-5, Comparative Examples 1 and 2] Examples 2-5 and Comparative Examples 1 and 2 were constructed using the same method as Example 1, except that the application method for the one-component moisture-curing waterproofing material and the temperature and humidity when applying the material to one surface of the test substrate were as shown in Table 1.

[0080] [evaluation] "Evaluation of the hardening state between layers" After bonding modified asphalt roofing to one side of the test substrate via a one-component moisture-curing waterproofing material, the modified asphalt roofing was peeled off the test substrate every 30 minutes, and the curing status of the one-component moisture-curing waterproofing material was visually checked. The time required for the curing of the one-component moisture-curing waterproofing material (interlayer curing time) is shown in Table 1.

[0081] "Evaluation of the time required for adhesive strength to develop" Samples for measuring the time required for adhesion development were prepared as shown in Figures 5 and 6. Similar to the embodiments described above, first sections 330A (100 mm square) of modified asphalt roofing 330 (product name: Presto 15, manufactured by Nisshin Kogyo Co., Ltd., width 100 mm, length 200 mm) were attached at equal intervals to the edge of one side (top surface) 320a of a one-component moisture-curing waterproofing material 320 that had been applied to one side 310a of a test substrate 310 (product name: Presto S, manufactured by Nisshin Kogyo Co., Ltd., width 1 m, length 1 m). At regular intervals, the second section 330B of the modified asphalt roofing 330 was grasped and pulled perpendicular to one surface 320a of the one-component moisture-curing waterproofing material 320 (in the direction of the arrow shown in Figure 6). The tensile shear strength was measured using a push-pull scale. The time at which the measured tensile strength exceeded 15 N was defined as the adhesion time. The results are shown in Table 1.

[0082] "judgement" A "○" was used to indicate a sufficient curing speed (shorter curing time than conventional manual application), a "△" was used if the curing speed was sufficient but there was a risk of defects, and a "×" was used if no improvement in curing speed was observed. The results are shown in Table 1.

[0083] [Table 1]

[0084] As shown in Table 1, comparing Example 1 and Comparative Example 1, it was found that, at a temperature of 24°C and a humidity of 65%, Example 1, which used an airless coating machine, was able to shorten the interlayer curing time and adhesive strength development time compared to Comparative Example 1, which did not use an airless coating machine. Furthermore, as shown in Table 1, when comparing Example 2 and Comparative Example 2, it was found that when the temperature was 17°C and the humidity was 30%, the interlayer curing time and adhesive strength development time were almost the same for Example 2, which used an airless coating machine, and for Comparative Example 2, which did not use an airless coating machine. Furthermore, as shown in Table 1, the results from Examples 1 to 3 indicate that the higher the temperature and humidity, the shorter the interlayer curing time and the time it takes for adhesive strength to develop. In other words, it was found that the curing speed of the one-component moisture-curing waterproofing material improves with higher temperature and humidity. Furthermore, as shown in Table 1, comparing Example 2 with Examples 4 and 5, it was found that Examples 4 and 5, which used mist, were able to shorten the interlayer curing time and adhesive strength development time compared to Example 2, which did not use mist. Furthermore, as shown in Table 1, comparing Example 4 and Example 5, moisture was detected between the one-component moisture-curing waterproofing material and the modified asphalt roofing when the mist particle size was large at 80 μm, but no moisture was detected when the mist particle size was small at 30 μm. In other words, it was found that when the mist particle size is small, it evaporates quickly and does not wet the target object, so excessive moisture is less likely to be generated. [Explanation of Symbols]

[0085] 1. Primer 2,4,22,31,33 One-component moisture-curing waterproofing material 3. Asphalt roofing 10,20,30 Waterproof structure 21 Asphalt roofing with partial adhesive layer 21A Base material 21B Adhesive layer 23. Asphalt roofing with sand 24 Protective layer 32 Base material 100 Room-temperature laminated asphalt waterproofing construction system 110 Painting machine 120 Mist Generator 210 A mist of water 220 One-component moisture-curing waterproofing material

Claims

1. A room-temperature laminated asphalt waterproofing method using a one-component moisture-curing waterproofing material containing modified silicone as the main component, A room-temperature laminated asphalt waterproofing method comprising a spraying step of spraying the aforementioned one-component moisture-curing waterproofing material in mist form toward an object using a painting machine.

2. The method for constructing a room-temperature laminated asphalt waterproofing system according to claim 1, wherein the spraying step is a step of spraying the one-component moisture-curing waterproofing material in mist form from the painting machine in an environment with a humidity of 50% or more.

3. The method for applying a cold-laminate asphalt waterproofing coating according to claim 1, wherein the spraying step is a step of spraying the atomized one-component moisture-curing waterproofing material sprayed from the coating machine with atomized water supplied separately from the one-component moisture-curing waterproofing material, while mixing the mixture and spraying it onto the target object.

4. The room-temperature laminated asphalt waterproofing method according to claim 3, wherein the average particle size of the mist-like water is 50 μm or less.

5. The system comprises a painting machine and a mist generator that produces a mist of water with an average particle size of 50 μm or less. A room-temperature laminated asphalt waterproofing system comprising spraying a mist-like, one-component moisture-curing waterproofing material from the aforementioned painting machine and the mist-like water supplied from the aforementioned mist generator, while mixing them and spraying the mixture onto the target object.

Images