KR101892997B1 - Waterproofing Method for Rooftop - Google Patents

Abstract

The present invention relates to a roof waterproofing method (S10) of forming a pore layer by applying a pore mortar to a concrete surface; Forming a primer layer on the upper surface of the relief layer by applying a primer (S20); (S30) forming a first waterproof layer by applying a two-pack type elastic coating material on the top surface of the primer layer; Attaching a nonwoven fabric to the upper surface of the first waterproof layer to form a reinforcing layer (S40); A step (S50) of forming a second waterproof layer by applying a two-pack type elastic coating material on the upper surface of the reinforcing layer; Spraying a rubber chip on the upper surface of the second waterproof layer (S60); And a step (S70) of forming a finish layer by applying a one-part modified polyurethane finish material mixed with a pigment on the upper surface of the second waterproof layer on which the rubber chip is sprayed.

Description

Waterproofing Method for Rooftop

The present invention relates to a rooftop waterproofing method, and more particularly, to a rooftop waterproofing method in which a pure rubber chip obtained by crushing a waste tire, a two-component elastic coating material obtained by synthesizing a polyurethane resin subjected to a medium pressure thermal reaction between cyanate and alcohol, And a waterproof layer is formed on the roof waterproofing method.

In general, the concept of waterproofing has been developed due to the watertightness, strength, load and impact of concrete in the construction of concrete, and the type of waterproofing can be classified into roof, indoor, Especially for roof waterproofing, asphalt waterproofing, sheet waterproofing, tan urethane waterproofing and rubber asphalt waterproofing have been applied.

Such a conventional waterproofing method has used a method in which a waterproofing liquid is added in the course of aging concrete, and a roof is formed or a waterproofing liquid is used for laminating and then finishing using a sheet or the like.

However, such a waterproof construction has a problem that the odor is generated, the fire hazard is exposed, and the waterproof effect of the waterproof layer deteriorates over time. In addition, when the waterproofing is performed using a sheet or the like, the waterproofing effect is remarkably deteriorated when the seat is separated and leakage occurs partially, and when the concrete in the roof is cracked due to vibration or distortion of the crust.

Therefore, according to the waterproof construction as described above, it is necessary to partially waterproof again after about one to two years, and it is almost impossible to completely waterproof the leaked portion even by such repair work. In order to protect the waterproofing layer, protective mortar and protective concrete must be applied for the waterproofing of sheet roof, asphalt waterproofing, film waterproofing and liquid mortar waterproofing for the building roof waterproofing. Therefore, there is a disadvantage that the air is extended and the construction cost is increased.

In addition, the roof waterproofing is performed in a double or triple construction, or the waterproofing layer is ruptured and lifted due to the cracks of the structure body and the protective layer due to the joint portion of the waterproofing layer and the thin coating film. In order to protect the waterproof layer, it is difficult to grasp the leakage area due to the protective mortar or protective concrete installed at the upper part.

Korean Patent Registration No. 10-0426899

Accordingly, the present invention has been made to overcome the above-mentioned problems of the prior art, and an object of the present invention is to provide a method for producing a rubber composition, which comprises mixing pure rubber chips obtained by pulverizing waste tires, polyurethane obtained by subjecting cyanate and alcohol to a heat- And a roof waterproofing method in which a waterproof layer is formed by sequentially laminating two-component elastic coating films, pore-closure films, non-woven fabrics, and the like.

Another object of the present invention is to form a seamless waterproof layer, to form a waterproof layer having excellent weatherability and durability and having a thermal insulation effect.

Another object of the present invention is to provide a waterproof layer which is lightweight and does not cause chemical reaction due to temperature, without cracking due to expansion and contraction.

The roof waterproofing method of the present invention comprises: (S10) forming a pore layer by applying a pore mortar to a surface of a concrete; Forming a primer layer on the upper surface of the relief layer by applying a primer (S20); (S30) forming a first waterproof layer by applying a two-pack type elastic coating material on the top surface of the primer layer; Attaching a nonwoven fabric to the upper surface of the first waterproof layer to form a reinforcing layer (S40); A step (S50) of forming a second waterproof layer by applying a two-pack type elastic coating material on the upper surface of the reinforcing layer; Spraying a rubber chip on the upper surface of the second waterproof layer (S60); And a step (S70) of forming a finish layer by applying a one-part modified polyurethane finish material mixed with a pigment on the upper surface of the second waterproof layer on which the rubber chips are spread.

For example, in step S60, the second waterproof layer may spray rubber chips before curing.

As an example, after step S40, the bentonite powder is sprayed on the upper surface of the nonwoven fabric forming the reinforcing layer to cause the bentonite powder to appear in the gap formed on the upper surface of the nonwoven fabric, and then the two-part elastic coating material is applied as the step S50 do.

For example, in step S40, a nonwoven fabric is adhered to the upper surface of the first waterproof layer to form a reinforcing layer. The nonwoven fabric has an intermediate layer having a smaller gap than the lower layer and the lower layer and an upper layer having a larger gap than the middle layer. .

As an example, in the step S10, 1 to 3 parts by weight of sodium thiosulfate pentahydrate and 0.5 to 2 parts by weight of one of D-galactose, D-mannose and D-altoose, or a mixture thereof, And 0.5 to 2 parts by weight of lithium are mixed and applied.

As described above, since the rooftop waterproofing method according to the present invention is formed of a multi-layered waterproof layer having elasticity, the surface of the ground floor has a strong resistance against cracking due to expansion or contraction, and since the waterproof layer is lightweight, It is possible to prevent cracks from being generated due to warping.

In addition, durability is enhanced by the reinforcing layer formed by the nonwoven fabric, and at the same time, the nonwoven fabric functions as a heat insulating layer, thereby preventing interlayer delamination due to thermal expansion.

In addition, the rubber chip is excellent in abrasion resistance, water resistance and flame resistance, and has the effect of exhibiting the function of keeping warmth.

In addition, it is easy to construct, easy to use, shorten the air and reduce the construction cost, and since it is an exposure type method, it can be utilized as a sports space or a resting space when forming a roof top floor of a building.

Further, the present invention is advantageous in that deterioration of concrete and corrosion of inner steel reinforcing bars can be prevented by forming a pore layer for protecting the concrete surface from neutralization and salt damage at the lower surface in contact with the concrete structure.

1 is a block diagram showing a roof waterproofing method of the present invention.
2 is a side cross-sectional view showing a roof waterproof structure to be constructed by the roof waterproofing method of the present invention.
Figure 3 is a side cross-sectional view in accordance with one embodiment of the present invention;

Hereinafter, preferred embodiments of the present invention will be described.

As shown in FIG. 1, the rooftop waterproofing method of the present invention comprises: (S10) forming a pore layer by applying a pore mortar to a concrete surface; Forming a primer layer on the upper surface of the relief layer by applying a primer (S20); (S30) forming a first waterproof layer by applying a two-pack type elastic coating material on the top surface of the primer layer; Attaching a nonwoven fabric to the upper surface of the first waterproof layer to form a reinforcing layer (S40); A step (S50) of forming a second waterproof layer by applying a two-pack type elastic coating material on the upper surface of the reinforcing layer; Spraying a rubber chip on the upper surface of the second waterproof layer (S60); And a step (S70) of forming a finish layer by applying a one-part modified polyurethane finish material mixed with a pigment on the upper surface of the second waterproof layer on which the rubber chips are spread.

2, the rooftop waterproof structure 1 is constructed of a pore layer 2 formed on the upper surface of the concrete structure c, The first waterproofing layer 4, the reinforcing layer 5, the second waterproofing layer 6, the rubber chip layer 7 and the finish layer 8, and the addition of the additional concrete and the seam As shown in FIG.

First, the material used in the roof waterproofing method according to the present invention will be roughly described as follows: plexiglass mortar, 2-part type undercoat, Flexi-Tan kp-1, 2-pack type elastic coating material, 2 (Flexi-Tan sc-2), rubber chip obtained by grinding waste tires, nonwoven fabric (or glass fiber), and Flexi-Tan Top used as a finish material with polyurethane compound do.

The above-mentioned Flexicane KP-1 (trade name) is used for the primer layer 3 and is a two-part base coating material prepared by synthesizing and mixing a compound material of an organic polymer to form a permeable coating film on the surface of the structure, It is a primer material that increases the adhesive strength of the waterproof layer described.

Flextans S-2 (trade name) is used for the first waterproof layer 4 and the second waterproof layer 6, and a polyurethane and a resin material processed by a medium pressure thermal reaction of cyanate with an alcohol are mixed and mixed And is a two-pack type elastic coating material.

The flexible top (trade name) is a material used for the finish layer 8, which is a one-pack type modified polyurethane based compound material and is usually used as a finishing material.

The total amount of the above materials used for the roof waterproofing according to the present invention is shown in the following table.

material Usage (per ㎡) Mixing ratio Flexicane KP-1 0.3 kg One-part type Flextans S-2 6.5 kg Two-part type: hardener 1: 2.5 Rubber chip 2 kg Non-woven 1.1㎡ Flexi Top 0.2㎡ One-part type

The roof waterproofing construction using such a material is carried out by the following construction sequence.

(S10) of applying a pore mortar to the concrete surface to form a pore layer. Before applying the pore mortar, the surface of the concrete (c) on the roof is removed with foreign substances such as laitance and oil, and the roughened surface of the roof concrete (c) to be waterproofed by the chipping process is smoothly treated.

Generally, the above-mentioned mortar is formed using cement. The reason for finishing the surface by using the pore mortar is that the waterproof structure described below can be uniformly applied to the surface of the concrete (c).

Also, the present invention proposes a composition of a mortar mortar for controlling the exposure of a concrete (c) structure to salting and neutralization while enhancing the filling property so that the microcracks formed on the surface of the concrete (c) are filled tightly.

To this end, the pomace mortar comprises 1 to 3 parts by weight of sodium thiosulfate pentahydrate and 0.5 to 2 parts by weight of one or a mixture of D-galactose, D-mannose, D-altoose and lithium hydroxide 0.5 To 2 parts by weight.

The reason why sodium thiosulfate pentahydrate (Na 2 S 2 O 3 .5H 2 O) is included in the present embodiment is to improve resistance to salt attack by penetration of calcium chloride. The sodium thiosulfate pentahydrate controls the chlorine content by the following reaction mechanism.

Cl 2 + Na 2 S 2 O 3 .5H 2 O + H 2 O → Na 2 SO 4 + 2HCl + S + 5H 2 O

Such sodium thiosulfate pentahydrate exhibits neutrality at a pH of about 6.5 to 8.0, thereby removing chlorine without causing acidification of the paste, thereby improving resistance to salt.

However, as shown in the above reaction mechanism, sulfur (S) due to self-reduction is likely to be liberated in the sodium thiosulfate pentahydrate, so that the liberated sulfur can generate harmful gas in the form of hydrogen sulfide (H2S) Or it may have harmful effects on the human body due to toxicity when spilled. To control this, one of D-galactose, D-mannose, D-altoose, or a mixture thereof is included. Hydrogen sulfide is a substance having odor and toxicity, and is deteriorated in activity by the following mechanism of D-galactose, D-mannose, and D-altoose to detoxify hydrogen sulfide.

On the other hand, in the case of pore mortar, a small amount of air entraining agent is added so as not to be mentioned above in order to improve the filling property. However, air that is present in the air bubbles flows out into the paste due to blasting of the air bubbles discharged after the compounding, application and installation. Especially, when the carbon dioxide is spilled out, a carbon dioxide film is formed between the concrete surface and the pus layer, There is a problem that it may become a point that causes neutralization.

In the case of carbon dioxide flowing out of the bubbles due to the addition of lithium hydroxide as described above, the lithium hydroxide fixes the carbon dioxide, thereby controlling the cause of the neutralization of the concrete.

Next, a primer layer is formed by applying a primer to the upper surface of the relief layer (S20). The two-part type undercoating material as a primer is sufficiently agitated on the upper surface of the oily layer 2 after the oily layer 2 is formed and the oily layer 2 is completely dried, and then a roller, a brush, The primer layer 3 is uniformly spread on the upper surface of the adhesive layer 2 to form a primer layer 3.

At this time, it is preferable to use the two-part type undercoating material as the primer layer forming the primer layer (3) at 0.3 kg per unit area (m 2) and cure for about 12 hours.

And then forming a first waterproof layer by applying a two-pack type elastic coating material on the top surface of the primer layer (S30). The first waterproof layer 4 is applied with about 3.2 kg of a two-pack type elastic coating material per unit area, and the first waterproof layer 4 is cured for 12 hours.

And then attaching a nonwoven fabric to the upper surface of the first waterproof layer to form a reinforcing layer (S40). When the nonwoven fabric is adhered to the upper surface of the first waterproof layer 4, the nonwoven fabric can be attached by the primer forming the primer layer 2.

The reason for constructing the reinforcing layer 5 in this way is to improve durability and to enhance interlaminar adhesion.

There is a step (S50) of forming a reinforcing layer 5 by the nonwoven fabric and applying a two-pack type elastic coating material to the upper surface of the reinforcing layer 5 to form a second waterproofing layer 6, When the ash is applied, the liquid film material penetrates the upper end portion of the nonwoven fabric to further strengthen the adhesion force.

In this process, the upper end portion of the nonwoven fabric may be shrunk due to the heat of the coating material permeating the upper end portion of the nonwoven fabric and the organic solvent. Such contraction may cause lifting between the reinforcing layer 5 and the second waterproofing layer 6, Which causes a problem that cracks are formed on the surface of the substrate.

In the present invention, bentonite powder is sprayed onto the upper surface of the nonwoven fabric forming the reinforcing layer 5 after step S40 so that the bentonite powder is made to appear in the gap formed on the upper surface of the nonwoven fabric, and then the two-part elastic coating material is applied .

Bentonite powder is sprayed on the nonwoven fabric forming the reinforcing layer 5 to allow the bentonite powder to be displayed on the gap formed on the upper surface of the nonwoven fabric. Thus, the two-pack type elastic coating material is applied in the subsequent step to infiltrate the coating material at the upper end of the nonwoven fabric. The bentonite powder expands due to the reaction between the coating material and the bentonite powder, thereby compensating for the shrinkage of the upper end of the nonwoven fabric. That is, lifting and cracking due to shrinkage of the upper end of the nonwoven fabric.

The bentonite powder is formed to have a diameter smaller than the gap of the nonwoven fabric so that the bentonite powder is to be displayed at the gap of the upper end of the nonwoven fabric.

Also, in the present invention, as shown in FIG. 3, an example is shown in which the reinforcing layer 5 functions to enhance the durability and interlaminar adhesion as well as the function of the heat insulating layer.

That is, in the present invention, the nonwoven fabric is formed by attaching a nonwoven fabric to the upper surface of the first waterproofing layer 4 in step S40 to form a reinforcing layer 5, 52 and the upper end 53 having a gap larger than the intermediate end 52 are laminated so that the reinforcing layer 5 is laminated by three nonwoven fabrics having different gaps. The lower end 51, the middle end 52, and the upper end 53 may be made of one product in the factory or may be formed by lamination in the field.

The lower end 51 and the upper end 53 of the reinforcing layer 5 of the present embodiment are formed such that the clearances d1 and d3 are equal to each other or similar to each other, d2 should be smaller than the gaps d1 and d3 of the lower end 51 and the upper end 53, respectively.

When the primer layer (a) is applied to the first waterproof layer (4) and the reinforcing layer (5) is attached when the reinforcing layer (5) of the present embodiment is attached to the first waterproof layer (4) The primer (a) penetrates into the gap between the lower end (51) and is hardened so that the reinforcing layer (5) is attached to the first waterproof layer (4).

The penetration of the primer (a) into the intermediate stage (52) is controlled as the gap becomes smaller at the intermediate stage (52). That is, the primer (a) is tightly penetrated into the larger gap of the lower end 51, and curing is performed.

When the second waterproof layer 6 is formed by applying the two-part elastic coating material to the reinforcing layer 5 in step S50, the coating material penetrates into the gap of the upper end 53 and is hardened, The waterproof layer 6 is attached. In the case of the coating material forming the second waterproof layer 6, penetration into the intermediate stage 52 is controlled as the gap becomes smaller at the intermediate stage 52. In this case, too, the coating material has a larger gap So that curing is carried out.

As a result, the primer (a) penetrates more tightly to the lower end 51 having a relatively large gap and hardens, and the coating material is hardly penetrated into the upper end 53 more tightly, (51) and the upper end (53) have a closed structure, and waterproof property is improved.

In particular, the middle stage 52, which has a relatively small gap, maintains the empty state of the gap as it is, so that the intermediate stage 52 itself functions as a heat insulating layer. That is, the heat from the upper part of the intermediate stage 52 is prevented from being transmitted to the lower side of the intermediate stage 52, thereby preventing the lift caused by the difference in the expansion ratio due to the transmission of heat.

And then forming a second waterproof layer by applying a two-pack type elastic coating material to the upper surface of the reinforcing layer (S50). The second waterproof layer 6 is formed by lining the two-pack type elastic coating film material evenly on the surface of the nonwoven fabric constituting the reinforcing layer 5 to form the first waterproof layer 4 and the reinforcing layer 5 in the same manner as the first waterproof layer 4, .

And then spraying a rubber chip on the upper surface of the second waterproof layer (S60). In this step S60, the second waterproof layer 6 may spray rubber chips before curing.

The reason for spraying the rubber chips before the curing of the second waterproof layer 6 is that a part of the rubber chips is embedded in the upper end of the second waterproof layer 6 so that rubber So that the chip layer 7 is cured in a state of being embedded in the second waterproof layer 6 and the finish layer 8, respectively. In this way, the rubber chip layer 7 embedded in both layers is formed to prevent slippage between the both layers.

That is, a step of forming a finish layer by applying a one-part modified polyurethane type finish material mixed with a pigment on the upper surface of the second waterproof layer on which the rubber chip is sprayed is applied in a subsequent step (S70), thereby finishing the waterproof structure As described above, the second waterproof layer 6 and the finish layer 8 are partially cured by the rubber chip layer 7 to be hardened, thereby further strengthening the adhesion of both layers.

Since the rubber chip layer 7 impregnated in the both layers is very dense, there is no gap through which water can pass, and the elasticity is increased because the rubber chip is evenly distributed in the inside. By the rubber chip thus distributed, The wear resistance is increased, and the heat transfer efficiency is lowered, so that the heat radiation efficiency is increased.

The finishing layer 8 is a one-component modified polyurethane-based compound which can be mixed with pigments having various colors, is mixed with a pigment of a desired color, and applied uniformly at a weight of about 0.2 kg per unit area to finish the work.

As described above, the roof waterproof structure (1) formed by the construction method of the present invention requires a protective mortar as a protective layer for protecting the waterproof layer by exposure, unlike asphalt waterproofing, sheet waterproofing, rubber asphalt waterproofing or urethane waterproofing I never do that. In addition, the surface of the concrete forming the roof is completely sealed without any seams at the bottom to prevent cracking and leakage of concrete.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification, but should be defined by the claims.

2: pus layer 3: primer layer
4: first waterproof layer 5: reinforcing layer
6: second waterproof layer 7: rubber chip layer
8: Finishing layer

Claims (5)

In the roof waterproofing method,
Applying a pore mortar to the concrete surface to form a pore layer (S10);
Forming a primer layer on the upper surface of the relief layer by applying a primer (S20);
(S30) forming a first waterproof layer by applying a two-pack type elastic coating material on the top surface of the primer layer;
(S40) of forming a reinforcing layer by forming a reinforcing layer by attaching a nonwoven fabric to the upper surface of the first waterproofing layer, wherein the reinforcing layer is formed by laminating an intermediate layer having a gap smaller than the lower layer and the lower layer and an upper layer having a gap larger than the interlayer;
A step (S50) of forming a second waterproof layer by applying a two-pack type elastic coating material on the upper surface of the reinforcing layer;
Spraying a rubber chip on the upper surface of the second waterproof layer (S60);
A step (S70) of forming a finish layer by applying a one-part modified polyurethane type finish material mixed with a pigment on the upper surface of the second waterproof layer on which the rubber chips are spread;
And the roof waterproofing method.
The method according to claim 1,
Wherein, in step S60, the second waterproof layer sprays rubber chips before curing.
The method according to claim 1,
After step S40, the bentonite powder is sprayed on the upper surface of the nonwoven fabric forming the reinforcing layer to allow the bentonite powder to appear in the gap formed on the upper surface of the nonwoven fabric, and then the two-part elastic coating material is applied as the step S50. Waterproofing method.
delete The method according to claim 1,
In the step S10,
1 to 3 parts by weight of sodium thiosulfate pentahydrate and 0.5 to 2 parts by weight of one of D-galactose, D-mannose and D-altoose or a mixture thereof and 0.5 to 2 parts by weight of lithium hydroxide are contained And the mortar is mixed and applied.

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