KR20180109361A - Structure of complex water-proof layer and method for constructing them - Google Patents

Abstract

The present invention relates to a structure of a complex waterproof layer and a construction method. The structure of a complex waterproof layer has an improved tensile strength without degrading an elongation rate of a urethane coating waterproof layer, and is able to prevent degradation of performance of a waterproof layer due to bubble generation which may occur when the urethane coating waterproof layer is separately constructed. The structure of a complex waterproof layer comprises: a urethane primer layer formed on concrete; a first urethane coating waterproof layer formed on the urethane primer layer; a high elongation rate elastic fiber reinforcing material formed on the first urethane coating waterproof layer; and a second urethane coating waterproof layer formed on the high elongation rate elastic fiber reinforcing material.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composite water-

More particularly, the present invention relates to a composite waterproof layer structure and a method of manufacturing the composite waterproof layer structure. More particularly, the present invention relates to a composite waterproof layer structure and a method of manufacturing the composite waterproof layer structure, To a composite waterproof layer structure capable of solving the problem of deterioration in the performance of the waterproof layer due to the thickness formation inconvenience and a construction method thereof.

Waterproofing works to form impermeable waterproof layer on the surface of the structure in order to prevent moisture from penetrating into the interior of the building, such as the roof, floor, underground parking lot, and joints of buildings. There is a slight difference in the structure and construction method depending on the base material, ground state, and waterproof material such as the part to be waterproofed, reinforced concrete or lightweight concrete.

The most commonly used methods are asphalt waterproofing, sheet waterproofing, and film waterproofing. Recently, a complex waterproofing method suitable for the situation such as a combination of these and lamination has been applied.

The asphalt waterproofing method has been used for the longest time. However, since the asphalt sheet has been used recently since it has many inconveniences during construction, there is still a problem that the workability in the winter season is poor, the joint between the sheets is weak and the durability is insufficient.

The sheet waterproofing method is a method in which a synthetic rubber or the like is formed into a sheet having a certain thickness and width and adhered to a waterproof surface at a construction site to form a waterproof layer. In this method, it is easy to realize necessary physical properties through various laminated structures in the production of sheet, and it is convenient to construct. However, it is difficult to carry out complicated part construction, and it is difficult to achieve complete watertightness in the seam between seats. There is a problem that it is done manually.

On the other hand, there are several kinds of coating waterproofing methods depending on the type of materials, such as urethane waterproofing method.

However, when the urethane waterproofing material is applied alone, the physical properties of the waterproofing material such as elongation and tensile strength may be maintained at an excellent level in the case where the external environmental conditions such as the laboratory are maintained. However, Humidity, etc.), the curing reaction of the urethane does not progress smoothly, thereby causing bubbles to be formed upon formation of the waterproof layer and causing a variation in thickness (lowering of the level of the base surface). These problems can not reproduce the properties of waterproofing materials such as elongation and tensile strength as in the laboratory. Therefore, it is necessary to develop Urethane waterproofing material having excellent elongation and tensile strength even in actual working environment.

Korean Patent Laid-Open No. 10-2009-0119008 (published on November 19, 2009) entitled " Combined waterproofing construction method and composite waterproofing layer structure formed thereby ", a composite waterproofing method using urethane is proposed.

In such a composite waterproofing method, fiber sheets, synthetic fibers, glass fibers, nonwoven fabrics and the like are inserted between the urethane waterproofing layers to prevent adhesion failure of the waterproof layer and cracks in the waterproof layer. However, in such a fiber sheet or nonwoven fabric, the elongation of the urethane waterproof layer In the case of a composite waterproofing method using a urethane coating material and a synthetic polymer sheet, a synthetic polymer sheet is formed on the top of the urethane coating waterproofing material, It is not easy to remove air bubbles under the seat.

KR 10-2009-0119008 (2009.11.19)

The object of the present invention is to provide a composite waterproofing layer structure and a method of constructing the composite waterproofing layer, which can improve the tensile strength without significantly reducing the elongation of the urethane waterproofing layer.

A problem to be solved by the present invention is to provide a composite waterproof layer structure and a construction method thereof that solve the weak point (deterioration of coating performance due to bubble generation) that occurs when a urethane coating is solely used.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a composite waterproof layer structure and a method of constructing the composite waterproof layer structure that solve the problem that it is difficult to secure a minimum film thickness that is generated when a urethane coating is solely used.

The various problems to be solved by the present invention are not limited to the above-mentioned problems, and other problems not mentioned can be clearly understood by those skilled in the art from the following description.

The composite waterproof layer structure according to one embodiment of the technical idea of the present invention comprises a urethane primer layer formed on a concrete formed on concrete, a first urethane film waterproof layer formed on a urethane primer layer, a high urethane film waterproof layer formed on the first urethane film waterproof layer And a second urethane coating waterproofing layer formed on the fibrous reinforcement and the high-syndrome elastic fiber reinforcement, wherein a part of the urethane contained in the first urethane coating waterproofing layer and the second urethane coating waterproofing layer is impregnated in the high- .

In the high-modulus elastic fiber reinforcement, the elastic fiber layer comprising the urethane fiber or the blend thereof and the nonwoven fabric layer formed under the elastic fiber layer are laminated using a urethane adhesive. The elastic fiber layer is composed of 1 to 30% by weight of urethane fiber, 70 to 99% by weight of an ester fiber, and the nonwoven layer may comprise a PET filament nonwoven fabric.

The waterproof protective layer may be a PET film, and the second urethane film waterproof layer and the waterproof protective layer may be simultaneously formed of a waterproof protective layer formed on the second urethane film waterproof layer and a pressed concrete formed on the waterproof protective layer. .

Alternatively, it may further comprise a urethane top coating layer formed on the second urethane coating waterproofing layer, and silica sand may be further sprayed on the second urethane coating waterproofing layer before forming the urethane top coating layer.

According to an aspect of the present invention, there is provided a method of constructing a composite waterproof layer structure, comprising the steps of: pretreating a base surface of a concrete; applying a urethane primer layer on a base surface of the concrete; Applying a waterproof layer, attaching a high-frequency elastic fiber reinforcement on the first urethane film waterproof layer, and applying a second urethane foam waterproof layer on the high-frequency elastic fiber reinforcement.

In this case, the method may further include the step of forming a waterproof protective layer on the second urethane film waterproof layer, and a step of placing the pressed concrete on the waterproof protective layer. The waterproof protective layer may be directly attached while applying the second urethane film waterproof layer .

In addition, the method may further include forming a urethane top coating layer on the second urethane coating waterproofing layer, and may further include spraying silica sand while applying the second urethane coating waterproofing layer.

The details of other embodiments are included in the detailed description and drawings.

The composite waterproof layer structure and the construction method according to various embodiments of the technical idea of the present invention can improve the tensile strength without lowering the elongation of the urethane coating waterproof layer, .

In addition, the composite waterproof layer structure and method of the present invention can solve the problem of degradation of the waterproof layer due to bubbling and swelling when the urethane waterproof layer is formed by partially impregnating the first and second urethane waterproofing materials in the elastic fiber reinforcement.

The composite waterproof layer structure and the construction method of the present invention include an elastic fiber reinforcement material, which is advantageous in that a minimum thickness of the waterproof layer can be secured even in an actual working environment.

In addition, since the PET film can be directly attached to the waterproof protective layer while applying the second urethane film waterproof layer, the waterproof layer and the protective layer can be simultaneously applied, so that the process can be simplified and the process can be simplified, So that it can enjoy an economic synergy effect.

Further, since the PET film excellent in compatibility with urethane can be directly attached to the waterproof protective layer while applying the second urethane film waterproof layer, the waterproof property of the waterproof layer is further improved, and durability and antifouling property are improved.

When the top coat layer is formed on the second urethane film waterproof layer, it has a non-slip effect by spraying and coating silica sand.

Various other effects of the present invention will be mentioned in the text.

FIG. 1 is a cross-sectional view schematically showing a composite waterproofing layer structure according to an embodiment of the technical idea of the present invention,
FIG. 2 is a flow chart schematically showing a method of constructing the complex waterproof layer of FIG. 1,
FIG. 3 is a cross-sectional view schematically showing a composite waterproofing layer structure according to an embodiment of the technical idea of the present invention,
FIG. 4 is a flow chart schematically showing a method of constructing the complex waterproof layer of FIG. 3,
5 is a cross-sectional view schematically showing a composite waterproofing layer structure according to an embodiment of the present invention,
FIG. 6 is a flow chart schematically showing a method of constructing the complex waterproof layer of FIG. 5,
7 is a cross-sectional view schematically showing an elastic fiber reinforcement according to the present invention.

The following detailed description of the invention refers to the accompanying drawings, which illustrate, by way of illustration, specific embodiments in which the invention may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the invention. It should be understood that the various embodiments of the present invention are different, but need not be mutually exclusive. For example, certain features, structures, and characteristics described herein may be implemented in other embodiments without departing from the spirit and scope of the invention in connection with an embodiment. It is also to be understood that the position or arrangement of the individual components within each disclosed embodiment may be varied without departing from the spirit and scope of the invention. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the present invention is to be limited only by the appended claims, along with the full scope of equivalents to which such claims are entitled, if properly explained. In the drawings, like reference numerals refer to the same or similar functions throughout the several views.

Also in the present invention, when each element is referred to as being formed on or "on " each element, it is meant that each element is formed directly on top of each element, It may be additionally formed on the substrate, between the layers, on the object, and on the substrate.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, so that those skilled in the art can easily carry out the present invention.

1 is a cross-sectional view schematically showing a composite waterproofing layer structure according to an embodiment of the present invention.

1, a composite waterproof layer structure according to an embodiment of the present invention includes a urethane primer layer 20, a first urethane film waterproof layer 30, a high-frequency elastic fiber reinforcement material 40, and a second urethane film waterproof layer 50 ).

1, 3, and 5, a part of the urethane contained in the first urethane waterproofing layer 30 and the second urethane waterproofing layer 50 is impregnated and partially mixed with the elastic fiber reinforcement 40 The boundaries of the layers are indicated by dotted lines.

The urethane primer layer 20 may be formed on the lower concrete 10 to improve the bonding strength between the concrete and the waterproof layer.

The first urethane film water-repellent layer 30 is formed on the urethane primer layer 20 and can prevent moisture penetration.

The high-frequency elastic fiber reinforcement 40 is formed on the first urethane film waterproofing layer 30 and adhered to the first urethane film waterproofing layer 30 with excellent bonding property. The first urethane film waterproofing layer 30 and the second urethane film waterproofing layer 30 A part of the urethane contained in the synthetic resin 50 is impregnated into the elastic fiber reinforcement 40 and hardened, so that the swelling phenomenon of the sheet caused by the method of attaching the synthetic polymer sheet does not occur.

In addition, in the present invention, since the high-tensile elastic fiber reinforcement 40 is included, even in an actual working environment where the environment such as temperature and humidity can not be stably maintained, the minimum thickness of the waterproof layer can be ensured and the elongation and tensile strength are not reduced It can be maintained at an excellent level.

As shown in Fig. 7, the high-rate elastic fiber reinforcement 40 is formed by the urethane fiber or the elastic fiber layer 41 including the blend thereof and the nonwoven fabric layer 42 formed below the elastic fiber layer 41 by using a urethane adhesive , And the blend includes polyester fibers.

In this case, the urethane fiber contains 1 to 30 wt%, preferably 5 to 15 wt%, more preferably 7 to 10 wt%, and the polyester fiber contains 70 to 99 wt%, preferably 85 to 95 wt% 95% by weight, and more preferably 90% by weight to 93% by weight.

(Or stretchability) of the composite waterproof layer is deteriorated if the content ratio of the urethane fiber is out of the above-mentioned numerical value range. If the content is too large beyond the numerical value range, the elasticity is good but the elastic fiber reinforcement There is a problem that the mechanical strength such as tensile strength is remarkably deteriorated.

In addition, the urethane fibers may preferably be specified as spandex. Spandex is obtained by polymerizing and melt-spun polyether and methylene diphenyl isocyanate. It has about three times the strength of the rubber seals, five to eight times the original length, and is lightweight and strong in aging resistance. Therefore, the composite waterproofing layer according to the embodiment of the present invention is characterized in that the reinforcing material having excellent tensile strength and stretchability can be applied to the waterproof layer structure by including spandex, thereby being excellent in crack responsiveness to concrete.

In the present invention, since urethane fibers are used as the elastic fiber reinforcement material 40 and a part of the urethane constituting the first and second urethane film waterproofing layers 30 and 50 is impregnated into the elastic fiber reinforcement material 40, Since the waterproof layer 30, the second urethane coating waterproof layer 50 and the elastic fiber reinforcement 40 can be mixed with each other, compatibility with the first and second coating film waterproof layers 30 and 50 made of urethane is very excellent, Further, as described above, since the swelling phenomenon of the composite waterproof layer structure obtained by grafting the coating film and the synthetic polymer sheet is suppressed, peeling of the coating waterproof layer and the sheet, which is a problem of the synthetic polymer sheet, can be solved.

The nonwoven fabric of the nonwoven fabric layer 42 may include PET (polyethylene terephthalate) long fiber nonwoven fabric. The nonwoven fabric layer 42 includes the nonwoven fabric layer 42, Can be solved.

In addition, by including the long-fiber nonwoven fabric, the tensile strength of the elastic fiber reinforcement 40 is improved as compared with the short-fiber nonwoven fabric.

The urethane fiber contained in the elastic fiber layer 41 is preferably a knitted fiber. Since knitted fibers are connected by an annular loop and the portions where the knitting yarns constituting the loop are relatively small, the loop is formed in a state where the binding force is small and free from each other. Therefore, when knitted fibers are easily deformed by external force and external force is removed, And has an excellent stretchability that can easily respond to external strain. In addition, the knitted fibers form a loop and are therefore more porous than other fabrics.

As described above, the present invention can be applied to a composite waterproofing layer having a high elastic modulus, which is excellent in elasticity, because a high-strength elastic fiber reinforcement can be stretched or shrunk even if cracks occur in the concrete, It is possible to keep the waterproof effect in a state of excellent waterproofing without causing cracks.

The second urethane film waterproofing layer 50 is formed on the high-frequency elastic fiber reinforcement 40 and adheres to the high-frequency elastic fiber reinforcement 40 with excellent bonding property, and moisture infiltration can be prevented.

The high-tensile elastic fiber reinforcement 40 formed between the first urethane film waterproof layer 30 and the second urethane film waterproof layer 50 improves the tensile strength without significantly lowering the elongation of the first and second urethane film waterproof layers .

The composite waterproof layer structure according to the embodiment of the present invention has a tensile strength of 2 to 50 N / mm, preferably 5 to 20 N / mm.

The elongation is at least 250%, preferably 250 to 700%, more preferably 270 to 420%.

The tear strength is 10 to 150 N, preferably 35 to 100 N, and more preferably 40 to 70 N.

Fig. 2 is a flow chart schematically showing a method of constructing the composite waterproof layer of Fig. 1. Fig.

Referring to FIG. 2, a method of constructing the complex waterproof layer of FIG. 1 will be described.

First, the base surface of the lower concrete is pretreated (S10). The pretreatment (S10) of the base surface may be to clean foreign matter on the concrete surface and to clean up the joints. For example, it may be a work such as removing the laitance, defogging, repairing cracks, and removing moisture of the concrete base.

A urethane primer layer is formed on the lower concrete on which the pretreatment S10 has been performed (S20). The urethane primer layer is used to increase the bonding strength between the concrete and the waterproof layer and can be applied by spraying, roller, brush or the like.

After the formation of the urethane primer layer (S20), a first urethane film waterproofing layer is formed on the upper side (S30), and a high-syndrome elastic fiber reinforcement is attached on the first urethane film waterproofing layer (S40). The first urethane film waterproofing layer can be applied by spraying, roller, brush or the like. The high-modulus elastic fiber reinforcing material may include an elastic fiber layer 41 and a nonwoven fabric layer 42 formed therebelow. The elastic fiber layer 41 may be a urethane fiber or a urethane fiber or a polyester blend fiber. The nonwoven fabric layer 42 ) May comprise a PET long fiber nonwoven fabric.

In this case, the urethane fiber contains 1 to 30 wt%, preferably 5 to 15 wt%, more preferably 7 to 10 wt%, and the polyester fiber contains 70 to 99 wt%, preferably 85 to 95 wt% 95% by weight, and more preferably 90% by weight to 93% by weight. Also, the urethane fibers are preferably spandex, and knitted fiber fabrics are preferred.

Then, a second urethane coating waterproofing layer is formed on the high-resilience elastic fiber reinforcement (S50). The second urethane film waterproofing layer can be applied by spraying, roller, brush or the like.

It is possible to improve the tensile strength without decreasing the elongation of the urethane coating waterproof layer by forming a high-modulus elastic fiber reinforcement between the first urethane coating waterproofing layer and the second coating film waterproofing layer.

3 is a cross-sectional view schematically showing a composite waterproofing layer structure according to an embodiment of the present invention.

3, the composite waterproof layer structure according to an embodiment of the present invention includes a urethane primer layer 20, a first urethane film waterproof layer 30, a high-frequency elastic fiber reinforcement material 40, a second urethane film waterproof layer 50, A waterproof protective layer 60, and a pressed concrete 70.

The urethane primer layer 20, the first urethane film waterproof layer 30, the high-syndrome elastic fiber reinforcement 40, and the second urethane film waterproof layer 50 can be described with reference to FIG.

The waterproof protective layer 60 is for protecting the waterproof layer and may be formed on the second urethane film waterproof layer 50. The waterproof protective layer 60 may be formed of a PET film, and may be directly attached while applying the second urethane film waterproof layer.

Then, a pressed concrete 70 is formed on the waterproofing protective layer 60.

The waterproof protective layer 60 and the pressed concrete 70 are sequentially formed on the second urethane film waterproofing layer 50 so that a composite waterproof layer structure for unexplored can be formed.

Fig. 4 is a flow chart schematically showing a method of constructing the composite waterproof layer of Fig. 3. Fig.

Referring to FIG. 4, a method of constructing the complex waterproof layer of FIG. 3 will be described.

2, a waterproof protective layer is formed on the second urethane film waterproof layer. In this case, a PET film may be used as the waterproof protective layer. In the case of applying the PET film The waterproof layer and the protective layer can be simultaneously formed (S51) by directly adhering the PET film while applying the second urethane film waterproof layer, thereby simplifying the process. By applying the PET film, the durability and the antifogging property of the waterproof layer .

In addition, since it is possible to attach the second urethane immediately upon application, it is possible to simplify the process, so that the construction cost and the construction time can be saved, thereby achieving economical synergy.

Thereafter, pressing concrete is placed on the waterproofing protection layer (S60), thereby completing the unexposed composite waterproofing layer structure.

5 is a cross-sectional view schematically showing a composite waterproofing layer structure according to an embodiment of the present invention.

5, the composite waterproof layer structure according to an embodiment of the present invention includes a urethane primer layer 20, a first urethane film waterproof layer 30, a high-frequency elastic fiber reinforcement 40, a second urethane film waterproof layer 50, , And a urethane top coating layer (80) to complete the composite waterproof layer structure for exposure.

The urethane primer layer 20, the first urethane film waterproof layer 30, the high-syndrome elastic fiber reinforcement 40, and the second urethane film waterproof layer 50 can be described with reference to FIG.

The urethane top coating layer 80 can be formed on the second urethane coating waterproofing layer 50 to protect the coating film waterproofing layer.

The second urethane film waterproofing layer 50 may include silica sand (not shown) in the upper area. The second urethane film waterproofing layer 50 can have a non-slip effect by the sandpaper of the upper region.

It is possible to form a composite waterproof layer structure for exposure by forming the urethane top coating layer 80 on the second urethane film waterproof layer 50.

Fig. 6 is a flow chart schematically showing a method of constructing the composite waterproof layer of Fig. 5;

Referring to FIG. 6, a method of constructing the complex waterproof layer of FIG. 5 will be described.

2, a second urethane coating water-proofing layer is formed (S50), and then a urethane top coating layer is formed on the second urethane coating waterproofing layer (S80) to form a composite waterproofing layer structure for exposure .

For the non-slipping effect of the second urethane coating waterproof layer, silica sand may be sprayed (S70) upon application of the second urethane coating waterproof layer so that silica sand is formed on the upper portion of the second urethane coating waterproof layer.

Example

Hereinafter, the configuration and operation of the present invention will be described in more detail with reference to preferred embodiments of the present invention. It is to be understood, however, that the same is by way of illustration and example only and is not to be construed in a limiting sense.

The contents not described here are sufficiently technically inferior to those skilled in the art, and a description thereof will be omitted.

Example 1

First, a urethane coating waterproofing material is applied to a glass plate having a release agent applied thereto over a certain area (5 * 12 cm). Attach elastic fiber reinforcements to the top of the applied urethane coating waterproofing material, but attach the PET long fiber nonwoven fabric layer downward. Thereafter, the urethane coating waterproofing material is applied again. Before and after each coating, sufficient time is allowed for curing to occur by applying all of the secondary urethane at a predetermined drying time so that the previously applied components can be cured to some extent. The urethane coating film waterproofing material is fully cured and then peeled off from the glass plate to complete the production of the test piece according to the embodiment of the present invention.

Test Example 1. Measurement of tensile strength

Test Specification: KS F4911: 2012

Temperature: 20 ± 2 ℃

Humidity: 65 ± 20% R.H

Test in the direction of length / width respectively.

Test Example 2. Elongation Measurement

Test Specification: KS F4911: 2012

Temperature: 20 ± 2 ℃

Humidity: 65 ± 20% R.H

Test in the direction of length / width respectively.

Test Example 3. Measurement of tear performance

Test Specification: KS F4911: 2012

Temperature: 20 ± 2 ℃

Humidity: 65 ± 20% R.H

Test in the direction of length / width respectively.

The results of Test Examples 1 to 3 described above are shown in Table 1 below.

Test Items unit Test result Dimensions - Thickness mm 2.0 Tensile strength (length) N / mm 9.4 Tensile strength (width) N / mm 8.0 Elongation (length) % 316 Elongation (width) % 383 Tear strength (length) N 53 Tear strength (Width) N 61

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, Those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims.

Therefore, the spirit of the present invention should not be construed as being limited to the above-described embodiments, and all of the equivalents or equivalents of the claims, as well as the following claims, I will say.

10: concrete, 20: urethane primer layer,
30: first urethane film waterproof layer, 40: high-frequency elastic fiber reinforcement,
41: elastic fiber layer 42: nonwoven fabric layer
50: second urethane film waterproof layer 60: waterproof protective layer,
70: pressed concrete, 80: urethane top coating layer

Claims (11)

A urethane primer layer formed on the concrete;
A first urethane coating waterproof layer formed on the urethane primer layer;
A high-frequency elastic fiber reinforcement formed on the first urethane waterproof layer; And
A second urethane film waterproof layer formed on the high-frequency elastic fiber reinforcement; / RTI >
Wherein a part of the urethane contained in the first urethane coating waterproofing layer and the second urethane coating waterproofing layer is impregnated in the high-syndrome elastic fiber reinforcement.
The method according to claim 1,
The high-frequency elastic fiber reinforcement
An elastic fiber layer comprising urethane fiber or blend thereof; And
And a nonwoven fabric layer formed under the elastic fiber layer is laminated.
3. The method of claim 2,
The elastic fiber layer
1 to 30% by weight of urethane fibers and 70 to 99% by weight of polyester fibers.
3. The method of claim 2,
Wherein the nonwoven fabric layer comprises a PET filament nonwoven fabric.
The method according to claim 1,
A waterproof protective layer formed on the second urethane film waterproof layer; And
And pressing concrete formed on the waterproofing protective layer,
Wherein the waterproofing protective layer is formed simultaneously with the second urethane film waterproofing layer.
The method according to claim 1,
And a urethane top coating layer formed on the second urethane coating waterproof layer.
The method according to claim 6,
And a silica sand formed on the second urethane film waterproofing layer upper region.
Pretreating the surface of the concrete;
Applying a urethane primer layer on the surface of the concrete;
Applying a first urethane film waterproofing layer on the urethane primer layer;
Attaching a high-frequency elastic fiber reinforcement to the first urethane film waterproof layer; And
Applying a second urethane coating waterproof layer on the high-frequency elastic fiber reinforcement; Wherein the composite waterproofing layer comprises a waterproof layer.
9. The method of claim 8,
Directly adhering the waterproof protective layer while applying the second urethane film waterproof layer; And
Placing a pressed concrete on the waterproof protective layer; Further comprising the steps of:
9. The method of claim 8,
And forming a urethane top coating layer on the second urethane coating waterproof layer.
9. The method of claim 8,
Further comprising the step of spraying silica sand while applying the second urethane coating waterproofing layer.

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