Construction method of waterproof structure

Abstract

To provide a construction method of a waterproof structure capable of securing waterproof performance, shortening construction time at a construction site, and reducing material loss.SOLUTION: A construction method of a waterproof structure includes a primer coating step of coating a primer 2 on a surface of a concrete structure 9, an adhesive material installation step of coating an adhesive material 3 on the primer 2, and a top coating material coating step of coating the top coating material 4 on the adhesive material 3. The crack follow-up property is ≥ 0.8 mm measured by a crack follow-up property test method (proposal) of JSCE-K352 surface coating material. The crack followability of the top coating material is equal to or more than the crack followability of the adhesive material. In the adhesive material installation step, the adhesive material obtained by mixing a main agent and a curing agent is applied and cured.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a method for constructing a waterproof structure. [Background technology]

[0002] Concrete structures are subjected to various waterproofing measures to prevent water seeping in through cracks. For example, in railway slab track, waterproofing is achieved by painting the surface of the concrete slab track. However, in slab track, cracks occur in the concrete due to vibrations caused by trains running, and the resulting cracks repeatedly open and close. This causes damage to the paint applied to the slab track surface, making it impossible to ensure waterproofing. Furthermore, with conventional paint films, there is a risk that the top coat or other material will peel off in a film-like form from the film when cut, causing problems for vehicle traffic.

[0003] Conventionally, Patent Documents 1 and 2 have proposed techniques for protecting concrete surfaces.

[0004] Patent Document 1 discloses a protective sheet that is attached to the surface of civil engineering structures and architectural structures, and the protective sheet comprises an adhesive layer.

[0005] Patent Document 2 discloses a multilayer sheet for preventing concrete spalling, which comprises a first (meth)acrylic pressure-sensitive adhesive layer, a reinforcing substrate on the first (meth)acrylic pressure-sensitive adhesive layer, and a second (meth)acrylic pressure-sensitive adhesive layer on the reinforcing substrate, wherein the reinforcing substrate has a refractive index of about 1.40 to about 1.60 and is impregnated with the adhesive of the first and / or second (meth)acrylic pressure-sensitive adhesive layers. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Laid-Open No. 2005-200958 [Patent Document 2] Japanese Patent Application Publication No. 2018-053601 Summary of the Invention [Problem to be solved by the invention]

[0007] However, the technologies disclosed in Patent Documents 1 and 2 have the problem that because they are in sheet form, on-site application takes time for concrete structures with complex shapes such as slab track. In particular, at sites where slab track such as railways is installed, construction time is strictly limited, making it inappropriate to apply sheets over large areas. Furthermore, the technologies disclosed in Patent Documents 1 and 2 have the problem of requiring an overlap of the sheets to ensure continuity, resulting in material waste.

[0008] Therefore, the present invention has been devised in consideration of the above-mentioned problems, and its object is to provide a construction method for a waterproof structure that can ensure waterproof performance, shorten construction time on site, and reduce material waste. [Means for solving the problem]

[0009] The waterproof structure construction method of the present invention is a waterproof structure construction method for a concrete structure provided on the surface of the concrete structure, and comprises a primer application step of applying a primer to the surface of the concrete structure, an adhesive application step of applying an adhesive to the primer, the adhesive having an adhesive strength of 10 (N / 25mm) or more and 60 (N / 25mm) or less and a holding power of 1440 minutes or more, and a top coat application step of applying a top coat to the adhesive, wherein the crack tracking ability of the waterproof structure is 0.8mm or more as measured according to JSCE K-532, Crack Tracking Test Method for Surface Coating Materials (Draft). [Effects of the Invention]

[0010] According to the present invention, it is possible to ensure waterproof performance, shorten the construction time on site, and reduce material waste. [Brief explanation of the drawings]

[0011] [Figure 1] FIG. 1 is a diagram showing an example of a waterproof structure constructed by the waterproof structure construction method according to the first embodiment. [Figure 2] FIG. 2(a) is a diagram illustrating the primer application step, and FIG. 2(b) is a diagram illustrating the adhesive material application step. [Figure 3] FIG. 3(a) is a diagram illustrating the adhesive material application step, and FIG. 3(b) is a diagram illustrating the topcoat material application step. [Figure 4] FIG. 4 is a diagram showing an example of a waterproof structure in a state where a crack has occurred in a concrete structure. [Figure 5] FIG. 5(a) is a photograph showing the waterproof structure in Example 2 immediately after construction, and FIG. 5(b) is a photograph showing part 5A in FIG. 5(a). [Figure 6] FIG. 6(a) is a photograph showing the waterproof structure in Example 2 one year after construction, and FIG. 6(b) is a photograph showing part 6A in FIG. 6(a). DETAILED DESCRIPTION OF THE INVENTION

[0012] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments for carrying out a construction method for a waterproof structure to which the present invention is applied will be described in detail with reference to the drawings.

[0013] First Embodiment FIG. 1 is a diagram showing an example of a waterproof structure 1 constructed by the waterproof structure construction method according to the first embodiment.

[0014] The waterproof structure 1 is provided on the surface of a concrete structure 9 that is subjected to repeated vibrations, such as a railway slab track. The waterproof structure 1 is made up of a primer 2, an adhesive 3, and a topcoat 4. The concrete structure 9 may be, for example, a concrete viaduct.

[0015] The primer 2 is, for example, an organic resin such as an acrylic resin, and serves to bond the surface of the concrete structure 9 to the adhesive material 3. The primer 2 is a fast-curing type that cures in about 60 minutes or less at 23°C, and for example, Diovar manufactured by DIC Corporation is used. The viscosity of the primer 2 is preferably, for example, 1,000 (mPa·sec) or less. The primer 2 is applied, for example, to a thickness of about 200 μm or more and 400 μm or less. The primer 2 may be provided with putty to smooth out unevenness in the concrete structure 9.

[0016] The adhesive 3 has adhesive properties and is applied to the primer 2. The adhesive 3 is, for example, an organic resin adhesive such as an acrylic resin. The adhesive 3 may be applied by spraying or by using a roller or the like. The adhesive 3 is one that is not easily inhibited by oxygen. The viscosity of the adhesive 3 is preferably, for example, 2,000 (mPa·sec) or less. The holding power of the adhesive 3 is measured, for example, with reference to JIS Z 0237, based on the time it takes for a 500 g weight to slip and fall in a 40°C environment. The holding power of the adhesive 3 is, for example, such that the drop time is 1,440 minutes or more. The adhesive strength of the adhesive 3 is measured, for example, based on JIS Z 0237. The adhesive strength of the adhesive 3 is preferably, for example, 10 (N / 25 mm) or more and 60 (N / 25 mm) or less. If the adhesive strength of the adhesive material 3 is less than 10 (N / 25 mm), it may be difficult to stably adhere to the structure, and durability may decrease. If the adhesive strength of the adhesive material 3 exceeds 60 (N / 25 mm), the roller may easily stick to the adhesive material when applying the top coat, reducing workability. In addition, the adhesive material 3 may become hard, reducing flexibility and durability.

[0017] The adhesive 3 is produced by polymerizing an organic resin-based base material, such as an acrylic resin, by irradiating it with ultraviolet light. The adhesive 3 preferably achieves a polymerization rate of 90% or higher within three minutes of ultraviolet irradiation. The adhesive 3 has crack-following properties, and the crack-following properties of the adhesive 3 are preferably 0.8 mm or higher, as measured, for example, according to JSCE K-532, Draft Crack-Following Test Method for Surface Coating Materials. The adhesive 3 is thicker than the primer 2 and thicker than the topcoat 4. The thickness of the adhesive 3 is preferably 0.3 mm or more and 0.8 mm or less. If the thickness of the adhesive 3 is less than 0.3 mm, the thin thickness may reduce the crack-following properties of the adhesive 3 itself. If the thickness of the adhesive 3 is more than 0.8 mm, it becomes difficult to achieve a uniform film thickness during application. Furthermore, the amount of adhesive used increases, resulting in higher costs. Since the adhesive material 3 is sticky, by providing a topcoat material 4, it is possible to prevent dust and the like from adhering to the waterproof structure 1.

[0018] The topcoat 4 is an organic resin-based paint, such as silicone resin, applied to the adhesive 3. The topcoat 4 is a fast-curing paint with a curing time of approximately 60 minutes or less at 23°C. The topcoat 4 may be applied by spraying or by roller. The topcoat 4 has crack-tracking properties, and the crack-tracking properties of the topcoat 4 are preferably 15.0 mm or greater as measured, for example, according to JSCE K-532, Crack Tracking Test Method for Surface Coating Materials (Draft). The crack-tracking properties of the topcoat 4 are preferably equal to or greater than the crack-tracking properties of the adhesive 3. The topcoat 4 is waterproof, and preferably has a waterproofness of 0.20 or less as measured according to JIS A 6909. The topcoat 4 is preferably opaque, such as gray. This prevents sunlight and other light that can affect the adhesive function of the primer 2 from reaching the primer 2. The topcoat material 4 may be transparent. The viscosity of the topcoat material 4 is preferably, for example, 1,000 (mPa·sec) or less. The topcoat material 4 is applied to a thickness of, for example, about 0.1 mm or more and 0.3 mm or less.

[0019] Next, an example of a construction method for the waterproof structure in the first embodiment will be described.

[0020] The waterproof structure construction method in the first embodiment includes a primer application step, an adhesive material application step, and a topcoat material application step.

[0021] In the primer application step, first, as shown in Fig. 2(a), a primer 2 is applied to the surface of the concrete structure 9. In the primer application step, the primer 2 is applied by a roller, a spray, or the like. In the primer application step, unevenness formed on the concrete structure 9 may be smoothed using putty, or the like.

[0022] Next, in the adhesive application process, as shown in FIG. 2(b) and FIG. 3(a), an organic resin-based base material is applied to the primer 2.

[0023] Then, in the adhesive application process, ultraviolet light is irradiated onto the organic resin-based base agent applied to the primer 2, polymerizing the base agent to generate the adhesive 3, and the adhesive 3 is then applied to the primer 2. In the adhesive application process, the base agent and the adhesive 3 may be applied using a roller, a spray, or the like. The ultraviolet light is irradiated by a fluorescent lamp-type ultraviolet irradiation device 6 formed in a columnar shape. In the adhesive application process, the ultraviolet light is irradiated for a predetermined time of about 3 minutes by the ultraviolet irradiation device 6, which is spaced a predetermined distance from the adhesive 3.

[0024] Next, in the top coat application process, as shown in Fig. 3(b), a top coat 4 is applied to the adhesive material 3. In the top coat application process, the top coat 4 is applied by a roller, a spray, or the like. The applied top coat 4 is left for a predetermined time to dry.

[0025] This completes the waterproof structure construction method in the first embodiment.

[0026] As shown in Figure 4, when cracks 8 occur in a concrete structure 9 due to the passage of a train or other factors, the cracks 8 attempt to open and close due to repeated vibrations. As the cracks 8 open and close, cracks 8 also occur in the primer 2.

[0027] In this regard, in this embodiment, the adhesive material 3 is applied to the primer 2. As a result, even if the cracks 8 attempt to open and close due to vibrations such as those caused by a running train, the adhesive material 3 will expand and contract in response to the opening and closing of the cracks 8. This makes it possible to prevent cracks from occurring in the adhesive material 3. As a result, the adhesive material 3 prevents water from seeping into the concrete structure 9, making it possible to ensure waterproofing performance. In particular, in order to allow the waterproof structure 1 to follow cracks in the concrete structure 9, it is preferable that the crack followability of the waterproof structure 1 be 0.8 mm or more.

[0028] According to this embodiment, a topcoat application step is provided in which the topcoat 4 is applied to the adhesive material 3. This allows the topcoat 4 to be applied to the adhesive material 3, making it possible to prevent dirt, dust, etc. from adhering to the adhesive material 3.

[0029] According to this embodiment, the primer 2, adhesive 3, and topcoat 4 are all applied. This eliminates the need for overlapping areas as with conventional sheets. This makes it possible to reduce material waste. Furthermore, because the coating can be easily applied to even concrete structures 9 with complex shapes such as steps and holes, it is possible to shorten the construction time on site.

[0030] According to this embodiment, the crack-following ability of the top coat material 4 is equal to or greater than that of the adhesive material 3. As a result, when the adhesive material 3 expands and contracts in response to the opening and closing of the crack 8, the top coat material 4 also expands and contracts in response to the adhesive material 3. This makes it possible to prevent cracks from occurring in the top coat material 4. Therefore, according to this embodiment, the top coat material 4 prevents water from seeping into the concrete structure 9, making it possible to further improve waterproofing performance.

[0031] In this embodiment, in the adhesive installation step, an organic resin-based base agent is irradiated with ultraviolet light to polymerize the base agent and generate an adhesive. As a result, even if the crack 8 attempts to open or close due to vibrations such as those caused by a running train, the adhesive material 3, which has developed adhesiveness through a polymerization reaction due to ultraviolet light irradiation, expands and contracts in response to the opening and closing of the crack 8. This makes it possible to prevent cracks from occurring in the adhesive material 3. Therefore, according to this embodiment, the adhesive material 3 prevents water from seeping into the concrete structure 9, ensuring waterproof performance.

[0032] Furthermore, according to this embodiment, the adhesive properties of the adhesive material 3 can be developed by irradiating the adhesive material with ultraviolet light, which makes it possible to reduce the construction time on site.

[0033] According to this embodiment, the topcoat material 4 is opaque. This makes it difficult for light such as sunlight, which affects the adhesive function of the primer 2, to reach the primer 2. This makes it possible to prevent the adhesive function of the primer 2 from deteriorating over time.

[0034] According to this embodiment, ultraviolet rays are irradiated by the columnar ultraviolet irradiation device 6. This allows ultraviolet rays to be irradiated more efficiently onto the adhesive material 3 that has been applied with a predetermined width, thereby shortening the construction time on site.

[0035] Second Embodiment Next, a construction method for a waterproof structure according to a second embodiment will be described. The second embodiment differs from the first embodiment mainly in that the adhesive 3 is made by mixing a base agent and a curing agent. Detailed description of the same configuration as the first embodiment will be omitted below.

[0036] The adhesive 3 has adhesive properties and is applied to the primer 2. The adhesive 3 is, for example, an organic resin-based adhesive such as an acrylic resin. The adhesive 3 may be applied by spraying or by using a roller or the like. The adhesive 3 is one that is not easily inhibited by oxygen. The holding strength of the adhesive 3 is measured, for example, with reference to JIS Z 0237, based on the time it takes for a 500 g weight to slip and fall in a 40°C environment. The holding strength of the adhesive 3 satisfies, for example, a drop time of 1,440 minutes or more. The adhesive strength of the adhesive 3 is measured, for example, based on JIS Z 0237. The adhesive strength of the adhesive 3 is preferably, for example, 10 (N / 25 mm) or more and 60 (N / 25 mm) or less. If the adhesive strength of the adhesive 3 is less than 10 (N / 25 mm), stable adhesion to the structure may be difficult, and durability may be reduced. If the adhesive strength of the adhesive material 3 exceeds 60 (N / 25 mm), the roller will easily stick to the adhesive material during topcoat application, reducing workability. Also, the adhesive material 3 may become hard, reducing flexibility and durability.

[0037] The adhesive 3 is produced by mixing a base agent and a curing agent to polymerize the base agent. The base agent is an organic resin such as an acrylic resin, and the curing agent is an organic peroxide. The adhesive 3 has crack-following properties, and the crack-following properties of the adhesive 3 are preferably 0.8 mm or greater as measured, for example, according to JSCE K-532, Crack-Following Test Method (Draft) for Surface Coating Materials. The thickness of the adhesive 3 is, for example, greater than that of the primer 2 and greater than that of the topcoat 4. The thickness of the adhesive 3 is preferably, for example, 0.3 mm to 0.8 mm. If the thickness of the adhesive 3 is less than 0.3 mm, the thin thickness may reduce the crack-following properties of the adhesive 3 itself. If the thickness of the adhesive 3 is greater than 0.8 mm, it becomes difficult to ensure a uniform film thickness during application. Furthermore, the amount used increases, resulting in higher costs. Since the adhesive material 3 is sticky, by providing a topcoat material 4, it is possible to prevent dust and the like from adhering to the waterproof structure 1.

[0038] Next, an example of a construction method for the waterproof structure in the second embodiment will be described.

[0039] The waterproof structure construction method in the second embodiment includes a primer application step, an adhesive material application step, and a topcoat material application step.

[0040] In the primer application process, first, a primer 2 is applied to the surface of the concrete structure 9. In the primer application process, the primer 2 is applied by a roller, a spray, or the like. The applied primer 2 is allowed to harden for a predetermined time. If necessary, the primer 2 is provided with putty to smooth out unevenness in the concrete structure 9.

[0041] Next, in the adhesive application process, an organic resin-based base agent is mixed with a curing agent to polymerize the base agent, thereby generating an adhesive 3, and the generated adhesive 3 is applied to the cured primer 2. In the adhesive application process, the adhesive 3 is applied using a roller, spray, or the like.

[0042] Next, in the top coat application process, the top coat 4 is applied to the adhesive material 3. In the top coat application process, the top coat 4 is applied by a roller, a spray, or the like. The applied top coat 4 is left for a predetermined time to harden.

[0043] This completes the construction method for the waterproof structure in the second embodiment.

[0044] According to this embodiment, in the adhesive application step, a curing agent is mixed with an organic resin-based base agent, and the base agent is polymerized to produce the adhesive. This makes it easier to control the curing time of the adhesive 3 compared to when the adhesive 3 is produced by irradiating it with ultraviolet light. Furthermore, the adhesive can be applied even in outdoor locations during the day when ultraviolet light is present. This increases versatility.

[0045] According to this embodiment, in the adhesive application step, the main agent and the curing agent are mixed to generate the adhesive 3. Because the main agent and the curing agent can be mixed uniformly, the variation in the adhesiveness of the generated adhesive 3 can be reduced compared to when the adhesive 3 is generated by irradiating ultraviolet light. This can further improve the waterproof performance.

[0046] In this way, this construction method uses a coating film that is layered on-site using adhesive, rather than a normal adhesive coating or so-called elastic adhesive.By using an adhesive material 3 that has viscosity on the surface of the concrete structure and maintains its adhesive power without sticking (hardening), and by forming layers, it is possible to build a waterproof structure composed of a coating film that can follow the movement of cracks and other parts of the concrete structure without losing its elasticity.

[0047] Although examples of embodiments of the present invention have been described in detail above, the above-described embodiments are merely examples of specific implementations of the present invention, and the technical scope of the present invention should not be interpreted in a limiting manner based on these. [Example]

[0048] In Example 1, application methods and physical properties were compared using an inventive example and a comparative example.

[0049] Table 1 shows an overview of the examples of the invention. In the examples of the invention, a primer was first applied and any unevenness was corrected with putty. Then, in the examples of the invention, an adhesive was applied to the primer, and a top coat was applied to the adhesive to create a waterproof structure. The adhesive was an acrylic resin-based adhesive, produced by mixing an acrylic resin-based base agent with an organic oxide-based curing agent. The adhesive used had an adhesive strength of 34 (N / 25mm) and a holding power of 1,440 minutes or more. The thickness of the adhesive was 0.5 mm.

[0050] [Table 1]

[0051] Table 2 shows an overview of the comparative examples. For the comparative examples, a RAC sheet manufactured by SHOBOND Construction Co., Ltd. was used. In the comparative examples, a primer was first applied, and unevenness was corrected with putty. Then, in the comparative examples, a RAC sheet was placed on the primer to construct a waterproof structure.

[0052] [Table 2]

[0053] In the invention example, the primer, putty, adhesive, and topcoat can be applied by roller, spatula, etc. This makes it possible to shorten the application time on site and reduce material waste compared to the comparative example, which uses sheet materials.

[0054] In the example of the invention, the process from applying the primer to hardening the top coat can be completed in about 2 to 4.5 hours. In contrast, in the comparative example, it takes about 17 hours from applying the primer to applying the putty, and then the sheet is installed to complete the process. Therefore, in the example of the invention, construction can be completed faster than in the comparative example, and construction can be completed in the time between the last train and the first train on a slab track, for example.

[0055] Table 3 shows the physical properties of the invention examples and comparative examples.

[0056] [Table 3]

[0057] As shown in Table 3, the crack tracking ability of the waterproof structure of the invention example was 6.1 mm, which was lower than that of the waterproof structure of the comparative example, but it was confirmed to be a flexible coating film because it maintained the target value of 0.8 mm or more. Therefore, even if cracks occur in the concrete structure, the coating film can follow the cracks and prevent the coating film from breaking, thereby further improving waterproofing performance.

[0058] As shown in Table 3, the water permeability exceeded the target value for both the inventive example and the comparative example. Therefore, the inventive example can ensure waterproof performance. [Example]

[0059] In Example 2, a waterproof structure according to the present invention was experimentally constructed, and the appearance was visually observed immediately after construction and one year after construction. The waterproof structure was constructed by applying a primer, an adhesive, and a topcoat to a concrete structure suffering from combined deterioration due to ASR (alkali silica reaction) and frost damage. The waterproof structure used for the test construction had a crack tracking capability of 6.1 mm. The adhesive used had an adhesive strength of 34 (N / 25 mm) and a holding power of 1,440 minutes or more. The adhesive thickness was 0.5 mm.

[0060] As a result, as shown in Figures 5(a), 5(b), 6(a), and 6(b), no changes were observed in the appearance immediately after application or one year after application, and flexibility was maintained by the adhesive. Furthermore, no breaks were observed in the adhesive or topcoat material, even in the case of a crack approximately 2.0 mm wide that is thought to be caused by ASR. Therefore, it was confirmed that waterproofing performance was maintained even one year after application. [Example]

[0061] In Example 3, test specimens were prepared and the waterproof structure was evaluated for its walk resistance. Walk resistance was determined based on the dent test in JASS8 (a test method for evaluating the performance of membrane waterproofing layers), and a test specimen with 2 or more dents was deemed to have walk resistance. Table 4 shows an overview of the test specimens and the results of the dent test. In Table 4, a test specimen with walk resistance is marked with "Good" and a test specimen without walk resistance is marked with "Poor."

[0062] The specimens in Experimental Examples 1 to 8 were waterproof structures according to the present invention, in which an adhesive was applied to a primer, and a topcoat was applied to the adhesive. The primer was coated with putty to smooth out unevenness. The adhesive was an acrylic resin-based adhesive, produced by mixing an acrylic resin-based base agent with an organic oxide-based curing agent. The adhesive used had an adhesive strength of 34 (N / 25 mm) and a holding strength of 1,440 minutes or more. The thickness of the adhesive was 0.5 mm. In Experimental Examples 1 to 8, the walking resistance of each was evaluated using the crack-following ability of the waterproof structure as a parameter.

[0063] The specimen of Reference Example 1 had a waterproof structure in which a RAC sheet was placed on the primer. In addition, putty was placed between the primer and the RAC sheet.

[0064] [Table 4]

[0065] In Experimental Examples 1 to 6, the results of the dent test were 2 or more dents, and thus the tires have walking resistance. In Experimental Examples 7 and 8, the results of the dent test were less than 2 or more dents, and therefore the tires do not have walking resistance.

[0066] From the above, it is believed that in Experimental Examples 1 to 6, the crack followability was in the range of 0.7 mm or more and 6.1 mm or less, and the adhesive was harder than in Experimental Examples 7 and 8, which resulted in improved walking resistance compared to Experimental Examples 7 and 8. Therefore, from the perspective of walking resistance, it is preferable that the crack followability of the waterproof structure be 6.1 mm or less.

[0067] In Reference Example 1, the result of the dent test was dent 2 or more. Therefore, Reference Example 1 has walking resistance.

[0068] In addition, in order to conform to cracks in concrete structures, it is preferable that the waterproof structure have a crack conformability of 0.8 mm or more.

[0069] Therefore, in consideration of the walking resistance and the ability to follow cracks in the concrete structure, it is more preferable that the crack followability of the waterproof structure be 0.8 mm or more and 6.1 mm or less. [Explanation of symbols]

[0070] 1: Waterproof structure 2: Primer 3:Adhesive material 4: Topcoat 6: Ultraviolet irradiation device 9: Concrete structures

Claims

1. A construction method for a waterproof structure provided on the surface of a concrete structure, comprising: a primer application step of applying a primer to the surface of the concrete structure; an adhesive applying step of applying an adhesive having an adhesive strength of 10 (N / 25 mm) to 60 (N / 25 mm) and a holding power of 1,440 minutes or more to the primer; A topcoat application step of applying a topcoat material to the adhesive material, The crack followability of the waterproof structure is 0.8 mm or more as measured by JSCE K-532 Test Method for Crack Followability of Surface Coating Materials (draft) A construction method for waterproofing structure characterized by the above.

2. The crack-following property of the above-mentioned topcoat material must be equal to or greater than the crack-following property of the above-mentioned adhesive material.

2. A method for constructing a waterproof structure according to claim 1.

3. The adhesive application step comprises mixing a curing agent with an organic resin-based base agent to polymerize the base agent and generate the adhesive material.

2. A method for constructing a waterproof structure according to claim 1.

4. The adhesive material application step includes irradiating an organic resin-based base agent with ultraviolet light to polymerize the base agent, thereby generating the adhesive material.

2. A method for constructing a waterproof structure according to claim 1.

5. The above topcoat must be opaque 5. A method for constructing a waterproof structure according to claim 4,

6. The above concrete structure is a slab track.

2. A method for constructing a waterproof structure according to claim 1.

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