KR100996660B1 - waterproofing agent composition, waterproofing process using the same and waterproofing structure of the same - Google Patents

Abstract

The present invention relates to an environmentally friendly waterproofing agent composition. The waterproofing agent composition of the present invention is, by weight%, purified water 5.0-15.0, emulsifier 0.5-1.0, emulsifier adjuvant 1.0-3.0, styrenebutadiene copolymer resin 15.0-35.0, straight asphalt 40.0-60.0, emulsified asphalt stabilizer 2.0- 4.0, antifoam 0.1-0.5 and surface tension reducing agent 0.1-0.5.

Styrene-butadiene copolymer resin, straight asphalt, sealant, nonwoven fabric

Description

Waterproofing agent composition, waterproofing method using the same and waterproof structure {waterproofing agent composition, waterproofing process using the same and waterproofing structure of the same}

The present invention relates to a waterproofing agent composition, a waterproofing method using the same, and a waterproofing structure thereof, and more particularly, to a waterproofing agent composition, a waterproofing method using the same, and a waterproofing structure using the same using a coating film waterproofing method and a sheet waterproofing method.

In general, in order to prevent corrosion and damage of each structure, the waterproofing method is applied to the roof of the building, the roof of the underground parking lot, and the bridge deck. Waterproofing methods include broadly classified sheet waterproofing methods and coating film waterproofing methods.

The sheet waterproofing method uses a sheet, and the sheet has excellent resistance to waterproofing performance, behavior response of a structure, crack tracking, and external impact, compared to coating waterproofing.

The coating film waterproofing method forms a coating film in the field and has a seamless structure as compared with sheet waterproofing.

However, the sheet waterproofing method has a disadvantage in that it is difficult to find the place of the cause when a defect occurs due to leakage, so that the waterproof construction of the whole waterproofed structure must be redone.

The coating waterproofing method has a disadvantage in that it is difficult to form a waterproof coating film having a predetermined thickness or more over the waterproof structure unless the absolute amount of the waterproofing agent used is increased.

Therefore, in order to make use of the advantages of each method and reduce the disadvantages, the coating film waterproofing method and the sheet waterproofing method are mixed. That is to form a waterproof coating layer on the structure and install a waterproof sheet thereon to form a sheet waterproof layer to complete the waterproof structure.

For example, the sheet waterproof layer is formed by stacking a plurality of waterproof sheets and attaching both ends of neighboring waterproof sheets with a polyurethane sealant.

However, the sheet waterproofing layer generates defects in the waterproof sheet seam due to work defects and structural bonding. Polyurethane sealants also contain thinners such as xylene or xylene, causing environmental pollution.

One embodiment of the present invention relates to an environmentally friendly waterproofing agent composition, a waterproofing method using the same and its waterproof structure.

One embodiment of the present invention relates to a waterproof method and a waterproof structure that reduces the occurrence of defects in the joint portion of the waterproof sheet, and facilitates the repair of defects.

Waterproofing agent composition according to an embodiment of the present invention, in weight percent, purified water 5.0-15.0, emulsifier 0.5-1.0, emulsifier auxiliary 1.0-3.0, styrene-butadiene copolymer resin 15.0-35.0, straight asphalt 40.0-60.0, Emulsified asphalt stabilizer 2.0-4.0, antifoaming agent 0.1-0.5 and surface tension reducing agent 0.1-0.5.

The emulsifier may include a rosin acid-modified metal salt series. The emulsifying adjuvant may include an octylphenol-based emulsifier. The emulsified asphalt stabilizer may include a condensed amine series. The antifoaming agent may include a non-silicone polymer-based mixture having a hydrophilic group. The surface tension reducing agent may include a polyether modified polymethylsiloxane series.

Waterproofing method according to an embodiment of the present invention, the coating film waterproofing layer formed by applying the coating film waterproofing agent formed of the waterproofing agent composition to form a coating film waterproofing layer, by installing a neighboring waterproof sheet by maintaining a gap on the coating film waterproofing layer A sheet waterproof layer forming step of forming a sheet waterproof layer, and a joint forming step of forming a joint by connecting the waterproof sheets adjacent in the sheet waterproof layer with a non-woven fabric and a sealant.

The coating layer waterproofing step, the primer layer forming step of forming a primer layer on the structure with a primer comprising an asphalt emulsion, cement and silica, and a coating film waterproofing layer on the primer layer with a coating agent comprising a water-soluble rubber modified modified asphalt. It may include forming a coating film waterproof layer.

The seam forming step may include a first sealant coating step of forming a first sealant layer by applying a sealant between neighboring waterproof sheets and opposite ends of the waterproof sheets, and a nonwoven fabric for installing the nonwoven fabric on the first sealant layer. And installing a sealant on the nonwoven fabric, and applying a second sealant to form a second sealant layer embedded with the nonwoven fabric and integrated with the first sealant layer.

The sealant contains a main material and a hardener, and the main material includes, by weight, water purification 15.0-20.0, emulsifier 0.5-1.0, acrylic emulsion resin 5.0-10, styrene-butadiene copolymer resin 20.0-30.0, straight asphalt 35.4 -60.0, antifoam 0.1-0.5, and reaction inhibitor 0.01-0.05, wherein the curing agent, by weight, may include 0.5-1.5 plasticizer, and 0.5-1.5 isocyanate.

The emulsifier may include a modified rosin metal salt. The acrylic emulsion resin may include methyl methacrylate and normal butyl methacrylic acid. The reaction inhibitor may be a solution in which 0.01 wt% of hydroquinone is dissolved in methanol. The antifoaming agent may be a non-silicone polymer solution having a hydrophilic group. The plasticizer may comprise one of dioctylphthalate and dibutylphthalate.

The nonwoven fabric may be formed of glass fibers. The second sealant layer may be formed to have a larger area than the first sealant layer, and the first sealant layer may be formed to have a larger area than the nonwoven fabric.

In addition, the waterproof method according to an embodiment of the present invention, by applying a coating film waterproofing agent formed of the waterproofing agent composition to the structure to form a first coating film waterproofing layer, by maintaining a gap on the first coating film waterproofing layer Sheet waterproofing layer forming step of installing the neighboring waterproof sheet to form a sheet waterproof layer, a joint forming step of forming a joint by connecting the waterproof sheet adjacent to the non-woven fabric and the sealant in the sheet waterproof layer, and exposed from the joint and the joint And a second coating layer waterproofing layer forming step of forming a second coating layer waterproofing layer by applying a coating layer waterproofing agent formed of the waterproofing agent composition to the waterproofing sheet.

The waterproof sheet may include an asphalt sheet, a first nonwoven fabric and a second nonwoven fabric formed on both surfaces of the asphalt sheet.

The sheet waterproofing layer may be attached to the first coating film waterproofing layer toward the first nonwoven fabric side, and may be attached to the second coating film waterproofing layer toward the second nonwoven fabric side.

In addition, the waterproof structure according to an embodiment of the present invention may be made by using the waterproof composition and the waterproof method.

Thus, according to an embodiment of the present invention, by using a water-soluble rubber modified modified asphalt to form a coating waterproof layer on the surface of the structure there is an effect to implement an environmentally friendly waterproof construction.

Since the sheet waterproof layer is further formed by using the waterproof sheet, the sealant and the nonwoven fabric on the coating film waterproof layer, while enjoying the advantages of sheet waterproofing, there is an effect of reducing the occurrence of defects at the seam of the waterproof sheet and facilitating repair of the waterproof fault. .

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and the same or similar components are denoted by the same reference numerals throughout the specification.

For convenience, the waterproofing agent composition and the sealant composition will be described first in one embodiment of the present invention.

Table 1 shows the composition ratio of the waterproofing agent composition according to an embodiment of the present invention.

Composition ratio of waterproofing agent composition Composition Composition ratio (wt%) Purified water 5.0-15.0 Emulsifier 0.5-1.0 Emulsifier 1.0-3.0 Styrene Butadiene Copolymer 15.0-35.0 Straight asphalt 40.0-60.0 Emulsified asphalt stabilizer 2.0-4.0 Antifoam 0.1-0.5 Surface tension reducer 0.1-0.5

Referring to Table 1, the waterproofing agent composition according to the embodiment is in weight%, purified water 5.0-15.0, emulsifier 0.5-1.0, emulsifier auxiliary 1.0-3.0, styrene butadiene copolymer resin 15.0-35.0, straight asphalt 40.0- 60.0, emulsified asphalt stabilizer 2.0-4.0, antifoaming agent 0.1-0.5 and surface tension reducing agent 0.1-0.5.

For example, the emulsifier is formed to include a rosin acid-modified metal salt series. That is, the emulsifier may be a product of the rosin acid-modified metal salt series.

The emulsifying adjuvant may include an octylphenol-based emulsifier. That is, the emulsifier may be used by diluting the octylphenol emulsifier in a weight ratio of 25.0% by weight in 40 ℃ hot water.

Emulsified asphalt stabilizers may include condensed amines. That is, the emulsified asphalt stabilizer can be used by preparing a tribasic amine series in a 15.0 wt% aqueous solution in a amine-based product.

The antifoaming agent can use the non-silicone polymer type mixture which has a hydrophilic group.

Surface tension reducing agents may include polyether modified polymethylsiloxane series. That is, the surface tension reducing agent may be a basic product of PH7.5 or more in the surface tension regulator of the polyether modified polymethylsiloxane series.

As an example, a waterproofing agent manufacturing process will be described. In a state where the styrene-butadiene copolymer resin is controlled at a temperature of 40 ± 5 ° C., 30.0% by weight of the styrene butadiene is added to the mixing vessel and 1.0% by weight of the emulsifier is stirred at 150-200 rpm for 5 minutes. At this time, while stirring, 0.3 wt% of the antifoaming agent is gradually injected.

While maintaining the temperature of the mixture thoroughly mixed in the mixing vessel at 30 ± 5 ℃, 50.0% by weight of straight asphalt with temperature controlled at 125 ± 5 ℃ is added within 30 minutes, and the stirring speed of 500-950rpm is maintained. .

Stirring speed is gradually increased according to the degree of loading of straight asphalt and the maximum speed is 900rpm. At this time, in order to maintain the temperature in the mixing vessel at 70 ± 5 ℃, it is necessary to automatically adjust the ability to replace the cooling water and solvent in the mixing vessel.

After the completion of the straight asphalt addition, 2.0% by weight of the emulsion auxiliary solution was added and the mixture was cooled to 30 ° C. or lower while stirring for 30 minutes or more, followed by 10.0% by weight of purified water and 3.0% by weight of aqueous emulsion stabilizer, and surface tension reducing agent. Add 0.2% by weight and mix for 30 minutes to adjust the viscosity to 250 cps or less and the solids to 83 ± 3% by weight. Pack the finished waterproofing agent in the designated container.

Table 2 shows the composition ratio of the sealant composition according to an embodiment of the present invention.

Composition ratio of sealant composition Composition Composition ratio (wt%) subject Purified water 15.0-20.0 Emulsifier 0.5-1.0 Acrylic Emulsion Resin 5.0-10.0 Styrene Butadiene Copolymer 20.0-30.0 Straight asphalt 35.4-60.0 Antifoam 0.1-0.5 Reaction inhibitor 0.01-0.05 Hardener Plasticizer 0.5-1.5 Isocyanate 0.5-1.5

Referring to Table 2, the sealant according to an embodiment of the present invention is a two-component type containing a main agent and a curing agent. For example, the main material is weight%, water purification 15.0-20.0, emulsifier 0.5-1.0, acrylic emulsion resin 5.0-10.0, styrene-butadiene copolymer resin 20.0-30.0, straight asphalt 35.4-60.0, antifoaming agent 0.1-0.5, And reaction inhibitors 0.01-0.05. The hardener includes, by weight, plasticizer 0.5-1.5, and isocyanate 0.5-1.5.

For example, the emulsifier in the subject may include a modified rosin metal salt. The acrylic emulsion resin may include methyl methacrylate and normal butyl methacrylic acid. That is, the emulsion resin which emulsified methyl methacrylate and normal butyl methacrylic acid copolymer, and adjusted solid content to 55.0 weight% or more can be used.

The styrene-butadiene copolymer resin can use KSL3419 (product name) of Kumho Petrochemical. The reaction inhibitor may be a solution in which 0.01 wt% of hydroquinone is dissolved in methanol. The antifoaming agent can use the non-silicone polymer solution which has a hydrophilic group.

The plasticizer of a hardening | curing agent can use a dioctyl phthalate or a dibutyl phthalate. Isocyanates may use Bayer's Desmoles N3600 (trade name).

As an example, the sealant manufacturing process, that is, the manufacturing process of a main material and a hardening | curing agent, respectively is demonstrated.

First, when the main production process is described, 8.0% by weight of the acrylic emulsion resin is added to 4.0% by weight of purified water and a mixing vessel, and the temperature of the mixture is raised to 50 ± 5 ° C. After reaching the appropriate temperature, the stirrer was operated at 250 rpm, and 25.0 wt% of styrene butadiene copolymer resin, 0.01 wt% of reaction inhibitor, 0.7 wt% of emulsifier, and 0.2 wt% of antifoam were added and stirred for 30 minutes.

The stirred mixture is painted on a glass plate to check for the presence of particles. If particles are present, stir again for 30 minutes and retest. If particles are also present in the retester, filter them with 250 mesh stainless steel.

The temperature of the mixture from which the particles are removed is adjusted to 35 ± 5 ° C., and 50.0% by weight of straight asphalt having a temperature adjusted to 105 ± 5 ° C. is stirred at 450 rpm while feeding at a rate of 60 ± 10 liters per minute.

At this time, the stirring speed should be gradually increased according to the degree of liquid level rise, and the maximum stirring speed should not exceed 1,200 rpm. After stirring for 30 minutes after straight asphalt addition, 15.0% by weight of purified water is added and the mixture is cooled to a temperature of 30 ° C. or lower, and the finished subject is packed in a designated container.

Referring to the manufacturing process of the curing agent, 1.0% by weight of a plasticizer is added to the reaction vessel and charged with nitrogen gas while maintaining the temperature at 50 ± 5 ℃ and maintained for 4 hours while stirring at 150rpm.

After 4 hours, 1.0% by weight of isocyanate was added and nitrogen gas was recharged while stirring at 250 rpm to maintain the pressure in the reaction vessel at 1.3 Kgf / cm 2 for 2 hours, and then the completed curing agent was packed in a designated packaging container. During packaging, nitrogen gas is added to the packaging to prevent the curing agent from gelling during storage.

The waterproofing method and waterproof structure using the waterproofing agent and sealant manufactured in this way are demonstrated simultaneously.

1 to 3 are flowcharts of the waterproof method according to the first embodiment of the present invention.

1 to 3, the waterproofing method according to the first embodiment includes a coating film waterproofing layer forming step ST1, a sheet waterproofing layer forming step ST2, and a joint forming step ST3.

Referring to FIG. 1, in the coating film waterproofing layer forming step ST1, a coating film waterproofing agent is coated on the surface of the structure 100 to form the coating film waterproofing layer 1. Coating layer waterproofing step (ST1) may further comprise a primer layer forming step (ST11).

In the primer layer forming step (ST11), the primer layer 11 is formed by applying a primer including an asphalt emulsion, cement, and silica sand to the structure 100.

The primer layer 11 enhances the adhesion between the surface of the structure 100 formed of concrete and the coating film waterproof layer 1, and has excellent adhesion even when there is moisture on the surface.

Therefore, the primer layer 11 prevents the generation of bubbles between the coating layer waterproof layer 1 and the structure 100 after the coating layer waterproof layer 1 is formed.

In the coating film waterproofing layer forming step (ST1), after forming the primer layer 11 on the surface of the structure 100, the coating film containing a water-soluble rubber modified modified asphalt on the primer layer 11 by applying a coating film waterproofing layer (1) To form.

The coating layer waterproof layer 1 does not cause environmental pollution because it uses a water-soluble coating agent, it is absorbed by the surface of the structure 100 has the advantage of fast drying and excellent adhesion.

Referring to FIG. 2, in the sheet waterproofing layer forming step ST2, the sheet waterproofing layer 2 is installed on the coating waterproofing layer 1 to form the sheet waterproofing layer 2. For example, the waterproof sheet 21 may be formed of an asphalt sheet having a nonwoven fabric (not shown).

Since the coating film waterproofing layer 1 is made of a water-soluble coating film and the nonwoven fabric side of the waterproof sheet 21 is in close contact with the coating film waterproofing layer 1, the moisture of the coating film waterproofing layer 1 is reduced by the structure 100 and the waterproof sheet 21. Absorbed into the nonwoven side. Accordingly, the coating film waterproof layer 1 forms a strong adhesion between the structure 100 and the waterproof sheet 21.

The sheet waterproofing layer forming step ST2 maintains a gap between neighboring waterproof sheets 21 when installing the waterproof sheet 21 on the coating waterproof layer 1.

Referring to FIG. 3, in the joint forming step ST3, the neighboring waterproof sheets 21 are connected to the nonwoven fabric with a sealant to form the joint 3. That is, the waterproof sheets 21 are connected to the joint 3 to complete the sheet waterproof layer 2. That is, the sheet waterproof layer 2 is formed to include the waterproof sheets 21 and the joint 3.

For example, the joint forming step ST3 includes a first sealant coating step ST31, a nonwoven fabric installation step ST32, and a second sealant coating step ST33.

In the first sealant coating step ST31, a sealant is applied between neighboring waterproof sheets 21 and on both ends of the waterproof sheets 21 facing each other to form a first sealant layer 31. The first sealant layer 31 primarily seals between the waterproof sheet 21 and the coating layer waterproof layer 1 while attaching the outer circumference of the waterproof sheets 21 to the coating layer waterproof layer 1.

In the nonwoven fabric installation step ST32, the nonwoven fabric 32 is installed on the first sealant layer 31 to strengthen the joint strength of the joint 3, that is, the first sealant layer 31 and the second cylinder layer 33. Let's do it. For example, the nonwoven fabric 32 may be formed of glass fibers.

In the second sealant coating step ST33, a sealant is coated on the nonwoven fabric 32 to form a second sealant layer 33 on the nonwoven fabric 32. The second sealant layer 33 is formed integrally with the first sealant layer 31 to embed the nonwoven fabric 32 therebetween. In addition, the second sealant layer 33 secondly seals between the waterproof sheet 21 and the coating waterproof layer 1 while attaching the outer circumference of the waterproof sheets 21 and the first sealant layer 31.

4 is an exploded perspective view of the waterproof sheet joint portion.

Referring to FIG. 4, the second sealant layer 33 is formed in a larger area than the first sealant layer 31, and the first sealant layer 31 is formed in an area larger than that of the nonwoven fabric 32. That is, the nonwoven fabric 32 is formed with the smallest area while being wider than the gap between the waterproof sheets 21, and the second sealant layer 33 is formed with the largest area.

Accordingly, the nonwoven fabric 32 may be completely embedded on the first sealant layer 31 and the second sealant layer 33, and the first sealant layer 31 and the second sealant layer 33 may be adjacent to the waterproof sheets. It can be connected to each other by double filling between (21).

5 is a partial perspective view of the waterproof structure constructed according to the first embodiment of the present invention.

Referring to FIG. 5, the waterproof structure according to the first embodiment includes a coating waterproof layer 1 and a sheet waterproof layer 2 formed in a stacked structure on the structure 100. The sheet waterproof layer 2 further includes a seam 3.

That is, the coating film waterproof layer 1 may be formed alone, but further includes a primer layer 11 formed on the surface of the structure 100 to increase adhesion to the structure.

The sheet waterproofing layer 2 is formed of a waterproof sheet 21 provided on the coating film waterproofing layer 1, and when the plurality of waterproof sheets 21 are connected to each other, further includes a joint 3 connecting them.

The seam 3 includes a first sealant layer 31 formed between the waterproof sheets 21 and on both surfaces thereof, a nonwoven fabric 32 provided on the first sealant layer 31, and a nonwoven fabric 32. And a second sealant layer 33 formed on the first sealant layer 31.

That is, the neighboring waterproof sheets 21 are connected by the joint 3 to form the sheet waterproof layer 2. Therefore, the sheet waterproof layer 2 is partitioned by each waterproof sheet 21 for each waterproof sheet 21 on the coating film waterproof layer 1.

Therefore, the waterproofing defects in the sheet waterproofing layer 2 are generated for each of the waterproof sheets 21, and the defects are also repaired for each of the waterproof sheets 21. Therefore, it may be easy to check the location and repair of the waterproof defect.

Hereinafter, a second embodiment of the present invention will be described. Here, in comparison with the first embodiment, the description of the same parts of the second embodiment will be omitted and different parts will be described.

In order to avoid duplication of the drawings and descriptions, for convenience, the coating film waterproofing layer forming step ST1 and the coating film waterproofing layer 1 of the first embodiment are referred to as the first coating film waterproofing layer forming step and the first coating film waterproofing layer 201 in the second embodiment, respectively. do. Incidentally, the sheet waterproof layer 2 and the waterproof sheet 21 of the first embodiment are referred to as the sheet waterproof layer 202 and the waterproof sheet 221 in the second embodiment, respectively.

6 is a partial perspective view of a waterproof structure constructed in accordance with the waterproof method of the second embodiment of the present invention.

Referring to FIG. 6, in comparison with the first embodiment, the second embodiment further includes a second coating layer waterproofing step (not shown) and a second coating layer waterproofing layer 201a. The drawings of the waterproof method will be omitted, and the waterproof method and the waterproof structure will be described with reference to the waterproof structure of FIG. 6.

In the forming of the second coating waterproof layer, after the second sealant coating step ST33 shown in FIG. 3, the coating waterproofing agent is coated on the joint 3 and the waterproof sheet 221 to form the second coating waterproofing layer 201a.

The waterproof method of the second embodiment includes a first coating film waterproofing layer forming step, a sheet waterproofing layer forming step, a joint forming step and a second coating film waterproofing layer forming step.

Referring to FIG. 1, in the first coating waterproofing layer forming step ST1, the coating waterproofing agent is applied to the structure 100 to form the first coating waterproofing layer 201.

Referring to FIG. 2, in the sheet waterproofing layer forming step ST2, the neighboring waterproof sheets 221 are installed at intervals on the first waterproofing layer 201 to form the sheet waterproofing layer 202.

Referring to FIG. 3, in the joint forming step ST3, the waterproof sheets 221 adjacent to each other in the sheet waterproof layer 202 may be connected to the nonwoven fabric 32 and the first and second sealants 31 and 33 to form a joint 3. ).

Referring to FIG. 6, in the forming of the second coating layer waterproof layer, the coating layer waterproofing agent is applied to the joint 3 and the waterproof sheet 221 exposed from the joint 3 to form the second coating layer waterproofing layer 201a.

Since the second coating film waterproofing layer 201a is formed of two layers of the coating film waterproofing layer together with the first coating film waterproofing layer 201, the waterproofing reliability can be further improved as compared with the first embodiment.

FIG. 7 is a detailed cross-sectional view of the first coating film waterproofing layer, the waterproof sheet, and the second coating film waterproofing layer in FIG. 6.

Referring to FIG. 7, the waterproof sheet 221 includes an asphalt sheet 221a and a first nonwoven fabric 221b and a second nonwoven fabric 221c formed on both surfaces of the asphalt sheet 221a.

The first and second coating film waterproofing layers 201 and 201a are made of a water-soluble coating agent, and the first and second nonwoven fabrics 221b and 221c of the waterproof sheet 221 are interposed between the first and second coating film waterproofing layers 201 and 201a. It sticks to the side.

Moisture of the first and second coating film waterproof layers 201 and 201a is absorbed to the first and second nonwoven fabrics 221b and 221c of the structure 100 and the waterproof sheet 221. Accordingly, the first and second coating waterproof layers 201 and 201a form strong adhesion to the structure 100 and the waterproof sheet 221.

Although one embodiment of the present invention has been described above, the present invention is not limited thereto, and various modifications and changes can be made within the scope of the claims and the detailed description of the invention and the accompanying drawings. Naturally, it belongs to the scope of the invention.

1 to 3 are flowcharts of the waterproof method according to the first embodiment of the present invention.

4 is an exploded perspective view of the waterproof sheet joint portion.

5 is a partial perspective view of the waterproof structure constructed according to the first embodiment of the present invention.

6 is a partial perspective view of a waterproof structure constructed in accordance with the waterproof method of the second embodiment of the present invention.

FIG. 7 is a detailed cross-sectional view of the first coating film waterproofing layer, the waterproof sheet, and the second coating film waterproofing layer in FIG. 6.

<Explanation of symbols for the main parts of the drawings>

100 structure 1 coating layer waterproof layer

2, 202: sheet waterproof layer 3: seam

11: primer layer 21, 221: waterproof sheet

31: first sealant layer 32: nonwoven fabric

33: 2nd sealant layer 201, 201a: 1st, 2nd coating film waterproofing layer

221a: Asphalt sheet 221b, 221c: First and second nonwoven fabrics

Claims (21)

delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete By weight%, purified water 5.0-15.0, emulsifier 0.5-1.0, emulsifier adjuvant 1.0-3.0, styrenebutadiene copolymer resin 15.0-35.0, straight asphalt 40.0-60.0, emulsified asphalt stabilizer 2.0-4.0, antifoaming agent 0.1-0.5, and Waterproofing agent composition comprising a surface tension reducing agent 0.1-0.5 A first coating film waterproofing layer forming step of applying a coating film waterproofing agent formed on the structure to form a first coating film waterproofing layer; A sheet waterproofing layer forming step of forming a sheet waterproofing layer by installing neighboring waterproofing sheets by keeping a gap on the first coating waterproofing layer; A joint forming step of forming a joint by connecting the waterproof sheets adjacent to each other in the sheet waterproof layer with a nonwoven fabric and a sealant; And A second coating film waterproofing layer forming step of forming a second coating film waterproofing layer by applying a coating film waterproofing agent formed of the waterproofing agent composition to the seam and the waterproof sheet exposed from the joint, The waterproof sheet, An asphalt sheet and a first nonwoven fabric and a second nonwoven fabric formed on both sides of the asphalt sheet; The sheet waterproofing layer is attached to the first coating film waterproofing layer toward the first nonwoven fabric side, Adhered to the second coating layer on the second nonwoven fabric side; The seam forming step, A first sealant coating step of forming a first sealant layer by applying the sealant between neighboring water-resistant sheets and on both ends facing each other; A nonwoven fabric installation step of installing the nonwoven fabric wider than the gap between the waterproof sheets on the first sealant layer, and A second sealant coating step of coating the sealant on the nonwoven fabric to form a second sealant layer embedded with the nonwoven fabric and integral with the first sealant layer; The first sealant coating step, Applying the first sealant layer to a larger area than the nonwoven fabric, The second sealant coating step, And coating the second sealant layer to a larger area than the first sealant layer. delete delete Waterproof structure made of the waterproof method of claim 18.

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