KR100750381B1 - Construction Method for self-adhesive type composite waterproofing membrane considering salt-resistance and root-resistance - Google Patents

Abstract

The present invention is a self-contained composite waterproof coating method comprising the steps of: applying an acrylate-based ultra-fast curing type water-dispersible waterproofing material on the base concrete surface; And after 1 to 2 hours, attaching the self-adhesive composite rubberized asphalt sheet to the first waterproof layer formed by curing the waterproofing material to form a second waterproofing layer. The method is disclosed.

Self-contained composite waterproof coating method of the present invention is composed of two layers of acrylic waterproof layer and self-adhesive waterproof sheet well resists the crack of the ground concrete, can be installed in a short time without the use of organic solvent, the roots of plants, etc. A uniform coating film that cannot be formed can be formed.

Description

Construction method for self-adhesive type composite waterproofing membrane considering salt-resistance and root-resistance}

1 is a cross-sectional view showing an example of applying the waterproof coating method according to an embodiment of the present invention.

<Description of Symbols Used in Drawings>

1. First waterproofing layer 2. Second waterproofing layer

3. Liquid Membrane 4. Protective Layer

The present invention relates to a method for constructing a self-adhesive composite waterproof coating film, and more particularly, to a method for constructing a composite waterproof coating film for self-adhesive layer in which an acrylic waterproof layer and a self-adhesive waterproof sheet are laminated.

Due to the development of building technology and civil engineering technology, various kinds of waterproofing techniques and technologies such as sheet waterproofing, concrete waterproofing, coating waterproofing, asphalt waterproofing, metal sheet waterproofing and improved asphalt sheet waterproofing have been developed. However, according to the construction method, there are problems of each feature and specification. These problems include differences in effects after construction, labor costs during reconstruction, ease of construction, aging and deterioration due to ultraviolet rays, absorbency and water repellency problems, and adhesion problems with adhesives. Convenience and economy are emerging as problems in the building repair industry and the waterproof industry.

As a conventional general waterproofing material, a cement liquid waterproofing material, a vulcanized rubber sheet waterproofing material, an organic solvent type high coating film waterproofing material, and the like are used.

Cement liquid waterproofing material is a method of mixing asphalt emulsion, cement and water into a dough state to form a waterproof layer by applying it on the surface of the ground concrete structure, which is suitable for application in wet environment because it has the property of reacting with cement. In addition, the organic component forms an organic film between the cement mortar particles to provide a waterproof effect. However, such a cement liquid waterproof has no elasticity and thus does not cope with fine cracks in a dry environment, such that the waterproof layer is broken and a peeling phenomenon occurs.

The organic solvent-type rubber paint is developed and used as a rubber as a main material. When the organic solvent is dried and volatilized after construction, a rubber layer is formed, but the thickness is reduced to 0.2 to 0.3 mm, so that it is repeatedly applied to secure a thickness of 1 mm or more. shall. In addition, in order to form a rubber layer after drying once, the solvent should be left for at least 5 hours. In this process, after the dust is adhered to the coated surface, subsequent application of rubber paint is carried out to separate the waterproof layer. There was a problem that was likely to happen.

In addition, the vulcanized rubber sheet has elasticity, high recognized strength and elongation rate, and is excellent in vibration and impact protection and also excellent in chemical resistance. However, it is difficult to fully adhere the vulcanized rubber sheet to the outer wall of the structure to be adhered, and it is difficult to bond the sheet to the connection portion of the sheet. Therefore, such adhesion and bonding construction is not made properly, there was a problem that is likely to occur immersion and leakage.

In addition, in the case of the conventional rubber sheet, when the greenery is formed on the sheet, there is a problem that the roots of the plants planted in the greenery penetrate the rubber sheet to decrease the waterproof function.

Therefore, there is still a need for a waterproof material having improved performance that can withstand the cracks of the base concrete to resist the problems of the waterproof concrete, do not use an organic solvent, can be installed in a short time, and the roots of plants, etc. can not penetrate.

The technical problem to be achieved by the present invention is to provide a self-contained composite waterproof coating film construction method in which an acrylic waterproof layer and a self-adhesive waterproof sheet are laminated.

The present invention to achieve the above technical problem,

Claims [1] A method for constructing a self-supporting composite waterproof coating, comprising: applying an acrylate-based super hardening type water dispersible waterproofing material to a base concrete surface; And after 1 to 2 hours, attaching the self-adhesive composite rubberized asphalt sheet to the first waterproof layer formed by curing the waterproofing material to form a second waterproofing layer. Provide a method.

According to one embodiment of the present invention, the super fast-curing water-dispersible waterproofing agent is an inorganic waterproofing material, and the inorganic waterproofing material is divided into an acrylic polymer emulsion and an inorganic powder mixture before use. The polymer emulsion and the inorganic powder mixture are used in a weight ratio of 1: 1, and the inorganic powder mixture is preferably composed of 30 to 40% by weight of silica sand, 20 to 40% by weight of alumina cement and 30 to 40% by weight of fly ash. Do.

According to another embodiment of the present invention, the super fast-curing water-dispersible waterproofing material in the self-adhesive composite waterproofing coating method is a one-component waterproofing material, comprising: 68 to 77% by weight of one or more alkyl (meth) acrylate monomers; 14 to 16% by weight of styrene monomer; 7 to 10% by weight of acrylonitrile monomers; 1-3 wt% of an unsaturated monomer comprising an acid group; And it is preferable that 1-3 weight% of the unsaturated monomer containing a hydroxyl group contains the copolymer resin emulsion which was emulsion-polymerized.

According to another embodiment of the present invention, the composite rubberized asphalt sheet in the self-adhesive composite waterproofing coating method has a multi-layered structure consisting of two layers of high-density polyethylene film of the upper layer and a rubberized asphalt sheet of the lower layer It is preferable.

According to another embodiment of the present invention, it is preferable to further form a protective layer on the second waterproof layer in the self-supporting composite waterproof coating film construction method.

Hereinafter, the present invention will be described in more detail.

Self-contained composite waterproof coating method of the present invention, unlike the conventional waterproof construction method consisting of a single layer, consisting of two layers of acrylic waterproof layer and self-adhesive waterproof sheet well resists cracking of the ground concrete and does not use organic solvents. It is possible to form a uniform coating film that can be constructed within a short time and that the roots of plants and the like cannot penetrate.

The present invention is a self-contained composite waterproof coating method comprising the steps of: applying an acrylate-based ultra-fast curing type water-dispersible waterproofing material on the base concrete surface; And forming the first waterproof layer through which the waterproofing material is cured by passing the applied waterproofing material for 1 to 2 hours, and attaching a self-adhesive composite rubberized asphalt sheet on the first waterproofing layer to form a second waterproofing layer.

According to the construction method, since the first waterproof layer hardens within 2 hours, it has little involvement such as impurities. Since the high-strength asphalt sheet, which is self-adhesive after being applied once, is attached onto the first waterproof layer, for heat treatment and adhesion There is no need for an additional step such as a solvent, and there is no deformation of the waterproof layer. Thus, stable waterproof performance can be obtained. The ultra-fast curing type water-dispersible waterproof material can be applied to the wet base surface and excellent behavior response to the base.

If the curing time is less than 1 hour, the curing is not complete, and if the curing time exceeds 2 hours, there is a problem that contamination such as impurities occurs.

According to one embodiment of the present invention, the ultra-fast curing type water dispersible waterproofing agent used in the self-adhesive composite waterproofing coating method is an inorganic waterproofing material, and the inorganic waterproofing material is divided into an acrylic polymer emulsion and an inorganic powder mixture before use. The acrylic polymer emulsion and inorganic powder mixture is used by mixing in a weight ratio of 1: 1, the inorganic powder mixture is composed of 30 to 40% by weight of silica sand, 20 to 40% by weight of alumina cement and 30 to 40% by weight of fly ash It is preferable.

The inorganic waterproofing material may be applied to the floor or wall with a spray, roller, or the like to form a seamless waterproofing layer. If the inorganic waterproofing material is used, it can be used for wet waterproofing indoors and outdoors. More specifically, it is mainly applied to the interior walls and floors of structures such as indoor bathrooms, toilets, kitchens, and the like, and may also be used on roofs of buildings, basements, and the like. In particular, it is preferable to apply to roofless waterproofing and basement concrete upper slab for non-exposure.

The fly ash contained in the inorganic powder mixture is collected by a dust collector from the flue gas of the boiler that burns pulverized coal as ash contained in the combustible, in the present invention improves the processability and improves long-term strength and water tightness as a mixed material of inorganic powder In addition, by supplementing the function of the silica sand to reduce the proportion of the silica sand to act to reinforce the function of the acrylic polymer emulsion.

According to another embodiment of the present invention, the ultra-fast curing type water dispersible waterproof material used in the self-adhesive composite waterproof coating film construction method is a one-component waterproof material, 68 to 77% by weight of one or more alkyl (meth) acrylate monomers; 14 to 16% by weight of styrene monomer; 7 to 10% by weight of acrylonitrile monomers; 1-3 wt% of an unsaturated monomer comprising an acid group; And it is preferable that 1-3 weight% of the unsaturated monomer containing a hydroxyl group contains the copolymer resin emulsion which was emulsion-polymerized.

If the one-component waterproof is used, it can be used for indoor and outdoor dry waterproofing.

In the composition, the alkyl (meth) acrylate has a problem that the coating film is excessively retarded when it exceeds 77% by weight and the coating film is easily cured when it is less than 68% by weight.

The acid group-containing unsaturated monomer has a problem in that the water resistance and alkali resistance of the coating film are lowered when it exceeds 3% by weight, and when the acid group-containing unsaturated monomer is less than 1% by weight, the adhesion of the coating film is decreased.

When the hydroxyl group-containing unsaturated monomer is more than 3% by weight has little effect on the physical properties, when the hydroxyl group-containing unsaturated monomer is less than 1% by weight there is a problem in that the surface of the coating film occurs. Such cracking eventually leads to cracking of the coating film, which degrades the waterproofing performance.

If the styrene-based monomer is more than 16% by weight, there is a problem that the coating film is excessively cured, and if the styrene monomer is less than 14% by weight, the corrosion resistance of the coating film is poor.

If the acrylonitrile-based monomer is more than 10% by weight, there is a disadvantage that a uniform coating film is difficult to be obtained, and when the acrylonitrile monomer is less than 7% by weight, the adhesion to the substrate to be constructed is inferior.

In the case of the resin composition that satisfies the range of the composition, effective self-crosslinking is possible without the addition of a separate crosslinkable monomer or crosslinking agent. Thus, in the case of the waterproofing material including the resin composition, a coating film having excellent physical properties such as water permeability is uniformly formed. Can be.

In the above resin composition, when the composition of the alkyl (meth) acrylate monomer 68 to 77% by weight is shown in more detail, 30 to 35% by weight of n-butyl acrylate, 9 to 10% by weight of ethyl acrylate, 2-ethyl hexyl acrylate 16-18 weight% and 13-15 weight% of methyl methacrylate are preferable.

The resin composition comprising the specific composition of the alkyl (meth) acrylate monomer is preferably 30 to 35% by weight of n-butyl acrylate, 9 to 10% by weight of ethyl acrylate, 16 to 18% by weight of 2-ethyl hexyl acrylate. %, 13-15 wt% methyl methacrylate, 7-10 wt% acrylonitrile, 14-16 wt% styrene, 1-2 wt% acrylic acid and 1-2 wt% 2-hydroxy ethyl methacrylate ,

Most preferably 32% by weight of n-butyl acrylate, 9.5% by weight of ethyl acrylate, 17% by weight of 2-ethyl hexyl acrylate, 14% by weight of methyl methacrylate, 9% by weight of acrylonitrile, 15% by weight of styrene, 1.5% by weight acrylic acid and 2% by weight 2-hydroxy ethyl methacrylate.

The specific composition of the alkyl (meth) acrylate in the resin composition is determined according to the conditions of use at normal room temperature, but the composition can be changed if the conditions used are different.

On the other hand, it is preferable to further comprise 10 to 70 parts by weight of the emulsion-polymerized ethylene vinyl acetate copolymer emulsion based on 100 parts by weight of the copolymer resin emulsion. In particular, it is preferable to further include 10 to 70 parts by weight of an ethylene vinyl acetate copolymer emulsion based on 100 parts by weight (50% by weight of solid content) of the acrylic copolymer resin emulsion. As described above, in the case of additionally including a copolymer emulsion such as ethylene vinyl acetate, the resin composition has an advantage of improving adhesion strength. However, if the additional content is less than 10 parts by weight, the effect on the adhesion strength is insignificant, and if it exceeds 70 parts by weight, there is no significant effect on the increase in adhesion strength. As for the glass transition temperature (Tg) of the said ethylene vinyl acetate copolymer, -15-17 degreeC is preferable. If the glass transition temperature is less than -15 ° C, there is a problem that the coating film formation is too late, and if the glass transition temperature exceeds 17 ° C, the construction is not easy in winter.

The waterproofing material including the resin composition according to the present invention may be prepared by adding various additives in addition to the resin composition. Examples of such additives include emulsifiers, cryoprotectants, preservatives, inorganic dyes, fillers, plasticizers, thickeners, dispersants, antifoaming agents, and the like. In addition to the waterproofing material, it is possible to use the resin composition in all other fields such as paint, which requires the formation of a waterproof and stretchable coating film.

The composition of the waterproofing material according to the present invention including the above components is 40 to 55% by weight of the copolymer resin composition (50% by weight of solid content), 23 to 53% by weight of inorganic filler, 0.5 to 10% by weight of an emulsifier, and 0.1 to 0.1% of an antifoaming agent. 2.8 wt%, plasticizer 0.9-6 wt%, inorganic dye 0.2-4.3 wt%, pH adjuster 1.5-13 wt%, cryoprotectant 0.5-10 wt%, preservative 0.1-1.1 wt%, thickener 0.05-5 wt% and It is preferable to include the remaining amount of water.

 According to another embodiment of the present invention, the composite rubberized asphalt sheet used in the self-adhesive composite waterproofing film construction method is composed of two layers of high density polyethylene (HDPE) film of the upper layer and the rubberized asphalt sheet It is preferable to have a multilayer structure made up.

The two-ply high density polyethylene film is laminated so that directions cross each other so that the roots of the plant do not penetrate the rubberized asphalt sheet. Since the high-density polyethylene film is attached to the upper part of the rubberized asphalt, even if the waterproofing film of the present invention is constructed thereafter, the green film is transmitted by the roots of the plants planted in the greenery, thereby preventing the problem of waterproofing defects. .

In addition, it has good adhesion and flexibility to the base surface, so it is more stable during temperature change or structure vibration caused by external factors of the structure, and has excellent adhesion to the base surface, thus showing excellent waterproof performance when forming a waterproof layer. It is possible to use safer waterproof construction in closed underground construction by not using any heat or adhesive solvent at the time of bonding and joint construction.

According to another embodiment of the present invention, it is preferable to further form a protective layer on the second waterproof layer used in the self-supporting composite waterproof coating film construction method. Due to the presence of the protective layer it is possible to suppress the hardening of the rubberized asphalt sheet can prevent problems such as leakage. The protective layer may be a plain concrete layer, and is not particularly limited as long as it is generally used as a protective layer in the art.

In the above construction method, the distal end or the corner of the sheet is preferably reinforcement without any gap using a liquid membrane (corner reinforcement) or the like.

1 is a cross-sectional view showing an embodiment of a waterproof coating film construction method of the present invention.

First, arrange the waterproof base surface, mix the acrylic polymer emulsion and inorganic powder mixture in the weight ratio 1: 1 on the vertical wall and the base surface of the wall to prepare the inorganic waterproof material, and then spray it with high pressure with a spray The 1st waterproof layer coating film 1 (thickness 1mm) which has the performance and uniformity was formed.

Next, after 1 to 2 hours, the self-adhesive composite rubber asphalt sheet was attached onto the first waterproof layer, and the overlapped surface was strongly pressed with a roller or the like to form a self-adhesive type to form the second waterproof layer 2.

Finally, the sheet ends and corners were reinforced with the liquid membrane 3. And the protective layer 4 was added.

Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples, which are intended to explain the present invention to those skilled in the art, but the present invention is not limited thereto.

Synthesis of Copolymer Resin Emulsion (emulsion for 1-component waterproofing material)

Synthesis Example 1

At room temperature and normal pressure, 700 g of ion-exchanged water was first added to the monomer tank, and 50 g of the surfactant was added thereto while slowly stirring at about 120 rpm to completely disperse it. With continuous stirring of the dispersion, 233 g of acrylonitrile, 850 g of n-butyl acrylate, 245 g of ethyl acrylate, 450 g of 2-ethylhexyl acrylate, 370 g of methyl methacrylate, 396 g of styrene monomer, 40 g of acrylic acid and 2-hydroxy 48 g of ethyl methacrylate was added to prepare a monomer emulsion.

Next, 850 g of ion-exchanged water was first introduced into the reaction tank, and the surfactant was added while slowly stirring at about 80 rpm to completely disperse and maintained at 85 ° C. in temperature.

100 g of the monomers dispersed in the monomer tank was added to the reaction tank, and then allowed to stand for 3 minutes, followed by 50 g of a 10% by weight solution of ammonium bicarbonate. After clarifying again for 4 minutes, 60 g of a 10% by weight solution of persulfate sodium salt was added to initiate the reaction to produce a seed polymer.

After waiting for about 8 minutes, the polymer tank is slowly added with 60 g of the persulfate sodium salt solution to the reaction tank in which the polymer seed is dispersed. Adjust the dosing time so that the total dosing time is about 3 hours. After the addition of the monomer, the reaction was aged for about 60 minutes while maintaining the temperature of the reaction tank at 85 ° C. to proceed with the polymerization so that no unreacted monomer remained.

After the temperature of the reaction tank was lowered to 75 ° C., 40 g of 10 wt% t-butyl hydroperoxide solution was added thereto, and aged for about 30 minutes. The polymerization initiator was added and aged for about 30 minutes.

About 1 g of the copolymer resin emulsion thus obtained was collected and the amount of residual monomer was analyzed by GC to further mature until the amount of residual monomer became 0.2 to 0.15% by weight or less.

In order to increase the stability of the emulsion, etc., the pH of the emulsion was also adjusted to 6.5 to 10.5 by adding a buffer solution (25-10% aqueous ammonia) to maintain the stability of the emulsion.

Manufacture of 1-component waterproof

Preparation Example 1

A waterproof material including a copolymer resin composition according to Synthesis Example 1 was prepared. Various additives were prepared to the resin composition.

2275 g of the copolymer resin emulsion (50 wt% solids) prepared in Synthesis Example 1 was added to a 10 L container, where 60 g of octoxynol 40, PEG 100 g, paraffin solvent 45 g, mineral oil defoaming agent 26 g, isothiazoline ( 13 g of isothiazolin, 1242 g of calcium carbonate, 190 g of titanium dioxide (TiO ₂ ), 135 g of texanol, 200 g of triethanolamine, 140 g of methylcellulosolve, 224 g of ammonium chloride Water was added to adjust the amount to 5000g to prepare a one-component waterproof.

2-component waterproofing material manufacture

Preparation Example 2

An acrylic polymer emulsion (BITU-PLEX emulsion) and an inorganic powder mixture (BITU-PLEX powder) were prepared by mixing at a weight ratio of 1: 1.

Composite rubber asphalt sheet

Preparation Example 3

Self-adhesive composite sheet (Bituthene, USA, USA) was obtained and used as it is.

Self-contained composite waterproof coating

Example 1

First, the first waterproof layer coating film having the adhesiveness and uniformity to the base surface by arranging the waterproof base surface and spraying the inorganic waterproof material prepared in Preparation Example 2 with high pressure on the vertical wall and the base surface constituting the wall with a spray. ) (Thickness 1 mm) was formed.

Next, after 1 to 2 hours, the self-adhesive composite rubber asphalt sheet of Preparation Example 3 was attached to the first waterproof layer, and the overlapped surface was strongly pressed with a roller or the like to form a second adhesive layer 2 by self-adhesive. I was.

Finally, the sheet ends and corners were reinforced with the liquid membrane 3. And the plain concrete protective layer 4 was added.

Example 2

First, the first waterproof layer coating film having the adhesiveness and uniformity to the base surface by arranging the waterproof base surface and spraying the one-component waterproof material prepared in Preparation Example 1 on the vertical wall and the base surface constituting the wall at high pressure with a spray ( 1) (thickness 1 mm) was formed.

Next, after 1 to 2 hours, the self-adhesive composite rubber asphalt sheet of Preparation Example 3 was attached to the first waterproof layer, and the overlapped surface was strongly pressed with a roller or the like to form a second adhesive layer 2 by self-adhesive. I was.

Finally, the sheet ends and corners were reinforced with the liquid membrane 3. And the plain concrete protective layer 4 was added.

Self-contained composite waterproof coating method of the present invention is composed of two layers of acrylic waterproof layer and self-adhesive waterproof sheet well resists the crack of the ground concrete, can be installed in a short time without the use of organic solvent, the roots of plants, etc. A uniform coating film that cannot be formed can be formed.

Claims (5)

Self-adhesive composite waterproof coating method, Applying an acrylate based super fast curing type water dispersible waterproofing material to the base concrete surface; And After 1 to 2 hours, attaching the self-adhesive composite rubberized asphalt sheet on the first waterproof layer formed by curing the waterproofing material to form a second waterproof layer; self-contained composite waterproof coating film construction method comprising a . According to claim 1, wherein the ultra-fast curing type water dispersible waterproofing agent is an inorganic waterproofing material, Before the inorganic waterproofing material is divided into acrylic polymer emulsion and inorganic powder mixture, the acrylic polymer emulsion and the inorganic powder mixture is used in a weight ratio of 1: 1, the inorganic powder mixture is 30 to 40% by weight of silica sand, Self-adhesive composite waterproof coating method comprising a 20 to 40% by weight of alumina cement and 30 to 40% by weight fly ash. The waterproofing material according to claim 1, wherein the ultra-fast curing type water dispersible waterproof material is a one-component waterproof material. 68-77 wt% of at least one alkyl (meth) acrylate monomer; 14 to 16% by weight of styrene monomer; 7 to 10% by weight of acrylonitrile monomers; 1-3 wt% of an unsaturated monomer comprising an acid group; And 1 to 3% by weight of an unsaturated monomer comprising a hydroxyl group is an emulsion-polymerized copolymer resin emulsion. The method of claim 1, wherein the composite rubberized asphalt sheet has a multi-layered structure consisting of two layers of high density polyethylene film and a lower layer of rubberized asphalt sheet. The method of claim 1, wherein the protective layer is further formed on the second waterproof layer.

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