KR102671427B1 - Transparent liquid or powder-type waterproofing agents and waterproofing construction methods using them - Google Patents

Abstract

The present invention contains 55 to 70% by weight of water; 25 to 40% by weight of methyl methacrylate; 0.1 to 0.3% by weight of ammonium persulfate as an initiator; 2 to 5% by weight of at least one surfactant selected from sodium lauryl sulfate (SLS) and sodium laureth sulfate (SLES); and 0.5 to 2% by weight of an epoxy resin. A transparent liquid waterproofing composition containing the same, a powder-type waterproofing composition containing the same, and a waterproofing construction method using the waterproofing composition are provided.

Description

Transparent liquid or powder-type waterproofing agents and waterproofing construction methods using them}

The present invention relates to transparent liquid or powder-type waterproofing materials and waterproofing construction methods using them.

Waterproofing materials are mainly used to prevent water leaks due to cracks in underground structures or concrete structures. They are broadly divided into waterproofing materials using synthetic resin or synthetic rubber as the main material, and mortar-based waterproofing materials mixed with cement, sand, and waterproofing materials. It can be roughly distinguished.

Waterproofing methods that use synthetic resin or synthetic rubber as the main material include urea waterproofing, urethane waterproofing, sheet waterproofing, and elastic film waterproofing. In the case of the urea waterproofing, it is a type in which the main curing agent is sprayed and cured at the same time, and the curing is so fast that there is a risk of bubbles being generated and the equipment is expensive, so it is not popular. In addition, since it is an oil-based type, it is vulnerable to health and fire hazards, and it is impossible to work in the presence of moisture, so it is sensitive to weather and flaking occurs frequently due to moisture. In addition, since it blocks not only water but also air and moisture, the coating film is lifted, and the material is expensive, which reduces cost-effectiveness. In the case of urethane waterproofing, in addition to equipment problems, there are similar problems as urea waterproofing.

In the case of sheet waterproofing, exposure is difficult and concrete must be pressed after waterproofing work, so a large load is applied and if the sheet is damaged at the bottom over time, all pressed concrete must be removed, which has the disadvantage of being cumbersome. In the case of elastic film waterproofing, it is easy to construct, but the film is thin, so it lacks durability, and has the disadvantage of being damaged more quickly as water accumulates, especially in uneven areas.

In addition, waterproofing using synthetic resin or synthetic rubber as its main material has a problem of secondary cracking due to temperature changes because it is a different material from concrete structures and has different thermal expansion rates. Additionally, this type of waterproofing material has a different thermal expansion rate. Since the main raw material is a petrochemical product, the melting point is low, so there is a problem that the materials melt or easily ignite when exposed to a high temperature environment such as a fire. In addition, these waterproofing materials are greatly affected by moisture, making them unsuitable for application in humid seasons or locations.

Mortar-based waterproofing material, which is a mixture of cement, sand, and waterproofing materials, is the same material as concrete structures, but has different expansion and contraction rates depending on external temperature, different vibration rates due to external shock, and different drying shrinkage rates depending on humidity. Therefore, there is a problem that there is a high possibility that secondary cracks will occur in the waterproofing material treated area due to changes in external circumstances. Moreover, once such a secondary crack occurs, unlike waterproofing materials made mainly of synthetic resin or synthetic rubber, the crack does not stay in one place and continues to progress, resulting in a brittle crack phenomenon.

Meanwhile, conventional mortar-based waterproofing materials use general cement as a binder, and it is difficult for these conventional waterproofing materials to firmly bond the waterproofing material to the surface of the waterproofed area of the concrete structure, and also to secure the desired strength.

For this reason, in the case of conventional waterproofing materials that use cement as a binder, there was the inconvenience of constructing a separate reinforcing mortar or installing a separate protective wall in order to reinforce the adhesion strength of the area to be waterproofed. In addition, when only general cement is used as a binder, cracks due to shrinkage are susceptible to occurrence, so the problem of secondary cracks during the winter has emerged.

Meanwhile, in the case of exterior wall waterproofing, there is a lot of demand for waterproofing while maintaining the original color or original form of red brick, dryvit, marble, and paint. Conventional technology has mainly used a method of waterproofing the exterior wall by applying a water repellent agent. The water repellent agent mainly uses raw materials such as silicone or paripin, and waterproofs the outer wall by creating water droplets and letting them flow down. These water repellent agents have the advantage of maintaining the original design of the outer wall, but have a short lifespan due to lack of durability, and have the disadvantage of not being able to demonstrate waterproofing performance if cracks occur beyond a certain level.

Therefore, there is a need for the development of a new exterior wall waterproofing material that has excellent waterproofing performance and durability and can maintain the exterior wall design.

Republic of Korea Patent No. 10-0985194

The present invention was devised to solve the problems of the prior art described above,

The purpose is to provide a transparent liquid waterproofing material that has excellent waterproofing performance and durability, maintains waterproofing performance even when cracks occur, and can maintain the exterior wall design.

In addition, it is eco-friendly as it uses by-products from thermal power plants or steel mills as its main raw material, and has excellent waterproofing performance, durability, and fire resistance. In particular, it has excellent resistance to cracks and blocks the inflow of water while allowing air and moisture to pass through. The purpose is to provide a powder-type waterproofing material that can prevent the lifting phenomenon caused by and shorten the construction period through rapid curing.

In order to achieve the above object, the present invention

55 to 70% by weight of water; 25 to 40% by weight of methyl methacrylate; 0.1 to 0.3% by weight of ammonium persulfate as an initiator; 2 to 5% by weight of at least one surfactant selected from sodium lauryl sulfate (SLS) and sodium laureth sulfate (SLES); and 0.5 to 2% by weight of an epoxy resin. It provides a transparent liquid waterproofing material composition including a transparent liquid waterproofing material composition.

In addition, the present invention

Based on 100 parts by weight of the transparent liquid waterproofing composition, 70 to 130 parts by weight of the powder composition for filling the waterproofing material is mixed,

The powder composition for filling the waterproofing material includes 10 to 20% by weight of blast furnace slag; 5 to 10% by weight of fly ash; 5 to 15% by weight of calcium aluminate; 5 to 10% by weight of anhydrous gypsum; 3 to 5% by weight of slaked lime; 1 to 3% by weight of at least one selected from calcium hydroxide, sodium hydroxide, and calcium sulfate; 1 to 3% by weight of silica fume; 1 to 5% by weight of cellulose fibers with a length of 500 μm or less; 0.1 to 2% by weight of at least one selected from polypropylene fibers, polyethylene fibers and nylon fibers having a length of 6 mm to 12 mm; 0.1 to 1% by weight of polycarboxylic acid-based fluidizing agent; 3 to 7% by weight of foamed glass powder; and 40 to 60% by weight of silica sand.

The transparent liquid waterproofing composition of the present invention has excellent waterproofing performance and durability, maintains waterproofing performance even when cracks occur, and provides the effect of maintaining the exterior wall design.

In addition, the powder-type waterproofing composition of the present invention is eco-friendly as it uses by-products from thermal power plants or steel mills as its main raw material, and has excellent waterproofing performance, durability, and fire resistance. In particular, it has excellent resistance to cracks and blocks the inflow of water. It allows air and moisture to pass through, preventing the phenomenon of lifting due to moisture, and provides the effect of shortening the construction period through rapid curing.

The present invention will be described in detail below.

The transparent liquid waterproofing composition of the present invention contains 55 to 70% by weight of water; 25 to 40% by weight of methyl methacrylate; 0.1 to 0.3% by weight of ammonium persulfate as an initiator; 2 to 5% by weight of at least one surfactant selected from sodium lauryl sulfate (SLS) and sodium laureth sulfate (SLES); And 0.5 to 2% by weight of epoxy resin.

The surfactant is an anionic surfactant and is used in excess than in conventional techniques. In this way, when an excessive amount of surfactant is used than during general polymerization, the size of the polymer becomes 2-4 times smaller after polymerization, thereby increasing transparency. When using an actual emulsion polymerization polymer waterproofing material, the applied surface appears white or cloudy, and this phenomenon occurs because the size of the polymer is 200 nm or more. In other words, polymers of the same size as above scatter light, making the surface on which the waterproofing material is applied appear white or cloudy.

Since the transparent liquid waterproofing material of the present invention contains a polymer whose size is 70 nm or less, more preferably 60 nm or less, and even more preferably 50 nm or less, light scattering is reduced and transparency is increased accordingly.

On the other hand, if the size of the polymer is too small, the viscosity of the transparent liquid waterproofing composition may increase, which may result in poor workability or poor water resistance and adhesiveness. Therefore, the transparent liquid waterproofing composition of the present invention improves workability by relatively reducing the amount of monomer forming the polymer and increasing the amount of water.

In addition, the transparent liquid waterproofing composition of the present invention has the feature of compensating for water resistance and adhesiveness by adding a portion of epoxy resin.

The transparent liquid waterproofing composition can be preferably used for waterproofing construction of exterior walls of buildings, etc.

The epoxy resin may be a resin commonly used in this field. The epoxy resin includes, for example, bisphenol A resin, a resin synthesized from bisphenol A resin and bisphenol F, bisphenol F, 1,1-bisethane, 1,1-bisisobutylene, novolak resin, etc. More than one species may be used, but are not limited to these.

In addition, the present invention

With respect to 100 parts by weight of the transparent liquid waterproofing composition described above, 70 to 130 parts by weight of the powder composition for filling the waterproofing material is mixed and included,

The powder composition for filling the waterproofing material includes 10 to 20% by weight of blast furnace slag; 5 to 10% by weight of fly ash; 5 to 15% by weight of calcium aluminate; 5 to 10% by weight of anhydrous gypsum; 3 to 5% by weight of slaked lime; 1 to 3% by weight of at least one selected from calcium hydroxide, sodium hydroxide, and calcium sulfate; 1 to 3% by weight of silica fume; 1 to 5% by weight of cellulose fibers with a length of 500 μm or less; 0.1 to 2% by weight of at least one selected from polypropylene fibers, polyethylene fibers and nylon fibers having a length of 6 mm to 12 mm; 0.1 to 1% by weight of polycarboxylic acid-based fluidizing agent; 3 to 7% by weight of foamed glass powder; And it relates to a powder-type waterproofing composition comprising 40 to 60% by weight of silica sand.

The powder-type waterproofing material composition of the present invention uses by-products generated from thermal power plants or steel mills as its main raw material, and has the characteristic of providing the effects of environmental waste recycling and CO ₂ reduction.

In addition, the powder-type waterproofing composition of the present invention uses a material with a particle size of 4 μm or less as an inorganic binder, uses an excessive amount of microcellulose fibers, adds foamed glass powder to lower the specific gravity, and provides pores in the filler itself. It has the characteristic of increasing thermal insulation.

The blast furnace slag is a latent hydraulic material that replaces cement and cannot react independently due to the formation of an oxide film. However, when it reacts with strong alkalis such as slaked lime, calcium hydroxide, calcium sulfate, and sodium hydroxide, the oxide film is destroyed and the main components of blast furnace slag and water are destroyed. This hydraulic reaction occurs.

The fly ash undergoes a pozzolanic reaction, so it cannot react hydraulically on its own, but it reacts with strong alkalis, so it reacts with slaked lime, calcium hydroxide, calcium sulfate, or sodium hydroxide to have the reactivity of cement.

However, blast furnace slag has excellent long-term strength, but the initial strength development is slow and there is a risk of shrinkage. Therefore, by adding anhydrous gypsum, the expansion effect of anhydrous gypsum offsets the shrinkage of blast furnace slag.

The calcium aluminate is a by-product generated from steel slag and has the property of rapid hardening when reacted with water. Therefore, it can replace the initial strength development, which is a weak point of blast furnace slag, and also contributes to strength increase.

In addition to the effect of offsetting the shrinkage phenomenon caused by expansion action, the anhydrous gypsum suppresses the occurrence of cracks by lowering the heat of hydration, increases strength by filling voids, and improves waterproofing performance.

The silica fume is filled between pores to improve strength and waterproof performance, increase the viscosity of the waterproof powder, and increase insulation by reducing specific gravity.

The cellulose fibers, PP, PE, and nylon fibers connect the three-dimensional structure to suppress the occurrence of cracks in the powder, increase tensile strength and impact strength, and increase insulation by lowering specific gravity. In addition, even if a crack occurs due to an external impact, the overall damage is minimized by causing only the crack to be visible at the location rather than a long brittle crack. In addition, it is insoluble and has a good ability to retain water, so it can extend the pot life during work and sustain the hydraulic reaction by supplying moisture for a long time, thereby improving long-term strength.

The powder-type waterproofing composition of the present invention has the characteristic of maximizing crack resistance by forming a three-dimensional matrix structure of ultra-fine particles and long fibers.

If an excessive amount of fibers are added to the powder waterproofing composition of the present invention, the fibers become entangled in the machine during mixing and workability is reduced. Therefore, less than 2% by weight of long fibers are added, and cellulose fibers, which are short fibers that do not cause problems in production, are added in excess.

The polycarboxylic acid-based fluidizing agent improves flowability during work.

The foamed glass powder is a hollow body that is effective in insulating and preventing condensation and soundproofing, and is strong and does not easily break. However, because it is expensive, a certain amount is invested and the rest is replaced with ultra-fine powder binder and fiber to increase insulation, tensile strength, and impact strength.

The silica sand affects the increase in wear resistance and strength, and by selecting and using a certain size of 150μm-300μm, it provides a certain viscosity and workability when mixed with liquid waterproofing material.

The powder-type waterproofing material composition of the present invention maximizes waterproofing performance by forming a chemical bond between the ester group contained in the transparent liquid waterproofing material composition and the calcium hydroxide contained in the powder waterproofing material. In addition, the elasticity of the transparent liquid waterproofing material is maintained, thereby improving tensile strength, and through interaction, adhesion and impact strength are greatly improved.

The powder-type waterproofing composition of the present invention is an organic-inorganic composite waterproofing material that blocks water and allows air and small moisture to pass through, thereby enabling ventilation and preventing the phenomenon of lifting due to moisture and air. In addition, as a super-strong product, it has the advantage of curing quickly and being less affected by external influences.

The powder-type waterproofing material composition of the present invention may further include 5 to 15 parts by weight of a copolymer represented by the following formula (1) based on 100 parts by weight of the powder-type waterproofing material composition.

[Formula 1]

In the above formula, a, b and c are mole fractions,

A is 0.3 to 0.5, b is 0.3 to 0.5, c is 0.3 to 0.5, and a+b+c is 1.

In the copolymer, the structural unit of 2-(acryloyloxy)ethyl)trimethylammonium chloride (CAS No: 44992-01-0) contains an anion and a cation, allowing each component of the waterproofing material to be well mixed, and the powder component improves dispersibility. The ethylene glycol phenyl ether acrylate (EGPEA) structural unit improves the adhesion of the waterproofing material to the applied surface, increases the strength of the coating film, and improves the durability of the waterproofing material. In addition, the 1H,1H,2H,2H-perfluorooctyl acrylate (1H,1H,2H,2H-Perfluorooctyl acrylate CAS No: 17527-29-6) structural unit has excellent water repellency, improving the waterproof performance of the waterproofing material. greatly improves Therefore, the waterproofing composition containing the copolymer represented by Formula 1 provides improved waterproofing performance.

The copolymer of Formula 1 is a random copolymer, and may have a weight average molecular weight of 50,000 to 1,000,000, more preferably 150,000 to 350,000, and even more preferably 200,000 to 300,000.

In addition, the present invention

1) Washing the exterior walls of the building;

2) Applying a lithium-based concrete reinforcement agent to the cleaned exterior wall of the building;

3) filling cracks in the exterior wall of the building with the transparent liquid waterproofing composition;

4) applying the transparent liquid waterproofing composition to the entire exterior wall of the building to be waterproofed; providing a waterproofing construction method for the exterior wall of the building including the step.

In addition, the present invention

1) Cleaning the building roof, concrete water tank, or basement floor;

2) Applying a lithium-based concrete reinforcement agent to the cleaned building rooftop, concrete water tank, or basement floor;

3) filling cracks on the roof of a building, a concrete water tank, or a basement floor with the powder-type waterproofing composition;

4) Applying the powder-type waterproofing composition to the entire rooftop, concrete water tank, or basement floor of the building to be waterproofed; and

5) Applying at least one selected from urea, urethane, colored elastic coating waterproofing material, and epoxy for protection of the primary waterproofing layer formed in step 4), composite waterproofing, and exterior appearance; Rooftop, concrete, including; Provides a water storage tank or basement floor waterproofing construction method.

The construction method uses a lithium-based concrete penetration enhancer to increase surface strength, restore the strength of concrete, increase adhesion, and increase water absorption and water permeability resistance. The lithium-based concrete penetration enhancer is a water-soluble product and is less affected by external conditions due to its quick curing time and working time.

Hereinafter, the present invention will be described in detail through preferred embodiments. However, this is only for the purpose of clarifying the implementation of the invention to those skilled in the art, and does not mean that the scope of the invention is limited by these examples.

Example 1: Preparation of transparent liquid waterproofing material

60% by weight water; 35% by weight of methyl methacrylate; 0.2% by weight of ammonium persulfate as an initiator; Sodium lauryl sulfate (SLS) 3.8% by weight; and 1% by weight of epoxy resin; were mixed to prepare a transparent liquid waterproofing material.

Example 2: Preparation of powder-type waterproofing material

(1) Preparation of powder composition for filling waterproofing material

15% by weight of blast furnace slag; Fly Ash 8% by weight; Calcium aluminate 8% by weight; 8% by weight of anhydrous gypsum; 4% by weight of slaked lime; Calcium hydroxide 2% by weight; 2% by weight of silica fume; 3% by weight of cellulose fibers with a length of 300 to 500 μm; 1% by weight of nylon fibers having a length of 6 mm to 12 mm; 0.5% by weight of polycarboxylic acid-based fluidizing agent; 5% by weight of foamed glass powder; and 43.5% by weight of silica sand were mixed to prepare a powder composition for filling waterproofing material.

(2) Manufacturing of powder-type waterproofing material

A powder-type penetrating waterproofing material was prepared by mixing the transparent liquid waterproofing material prepared in Example 1 and the powder composition for filling the waterproofing material at a weight ratio of 5:5.

Example 3: Preparation of powder-type waterproofing material

With respect to 100 parts by weight of the powder-type waterproofing material prepared in Example 2, 8 parts by weight of the copolymer represented by the following formula (1) was further mixed to prepare a powder-type waterproofing material.

<Preparation of copolymer of Formula 1>

2-(acryloyloxy)ethyl)trimethylammonium chloride (CAS No: 44992-01-0), ethylene glycolphenyl ether acrylate (EGPEA), and 1H,1H,2H,2H- in ethylbenzene as a reaction solvent. Perfluorooctyl acrylate (1H,1H,2H,2H-Perfluorooctyl acrylate CAS No: 17527-29-6) was added at a molar ratio of 0.3:0.4:0.3, and 0.5 parts by weight of normal mercaptan was added to 100 parts by weight of all monomers. It was mixed to make it uniform. The polymerization solution prepared above was added to a 20 L reactor at a rate of 10 L/hr and polymerized at a temperature of 100°C. Unreacted monomers and reaction solvent were removed in a volatilization tank at a temperature of 150°C, and then washed, dehydrated, and dried. A copolymer of Formula 1 with a weight average molecular weight of 287,000 was obtained.

[Formula 1]

(a=0.3, b=0.4, c=0.3)

Construction example 1: Transparent liquid waterproofing material construction

1) The exterior walls of the building were thoroughly cleaned using a high-pressure washer or brush.

2) A lithium-based concrete reinforcement agent was applied.

3) The cracks were filled with the transparent liquid waterproofing material of Example 1.

4) The transparent liquid waterproofing material of Example 1 was applied with a roller or airless spray.

Construction example 2: Powder-type waterproofing material construction

1) The roof of the building was thoroughly cleaned using a high pressure washer or brush.

2) A lithium-based concrete reinforcement agent was applied.

3) The cracks were first filled with the powder-type waterproofing material of Example 2 or Example 3.

4) The powder-type waterproofing material of Example 2 or Example 3 was applied by spray or plastering knife.

5) Color elastic waterproofing material was applied to protect and improve the appearance of the waterproofing layer.

Comparative Example 1: Preparation of powder-type waterproofing material

5600g of polyvinyl acetate, 4000g of water, 100g of fumed silica, 30g of acrylic water-soluble dispersant, 20g of alkylamine oxide, and 10g of cellulose-based thickener were mixed.

10 kg of the above mixture was mixed with 3.2 kg of water. A powder-type waterproofing material was prepared by mixing the above mixture with 9.9 kg of Portland cement for 3 minutes.

<Test example>

In order to evaluate the performance of the powder-type waterproofing material prepared in the Examples and Comparative Examples of the present invention, the powder-type waterproofing material was cured, a specimen was manufactured, and the following physical properties were compared and measured.

Test Example 1: Adhesion strength test

In order to compare the adhesion strength characteristics of the powder-type waterproofing materials prepared in Examples 2 and 3 and Comparative Example 1 of the present invention, an adhesion strength test using KS F 4919 (cement-mixed polymer waterproofing material) was performed, and the results were It is shown in Table 1 below.

Test Example 2: Grinding resistance

For the powder-type waterproofing materials prepared in Examples 2 and 3 and Comparative Example 1 of the present invention, the chipping resistance was measured according to KS F 4919. The results are shown in Table 1 below.

Test Example 3: Tensile performance

In order to compare the tensile performance of the powder-type waterproofing material prepared in Examples 2 and 3 and Comparative Example 1 of the present invention, the tensile performance was measured according to KS F 4919. The results are shown in Table 1 below.

Test Example 4: Crack resistance

In order to compare the crack resistance of the powder-type waterproofing materials prepared in Examples 2 and 3 and Comparative Example 1 of the present invention, the crack resistance was measured according to KS F 4919. The results are shown in Table 1 below.

Test Example 5: Absorption amount

In order to compare the absorbency of the powder-type waterproofing materials prepared in Examples 2 and 3 and Comparative Example 1 of the present invention, the water absorption amount was measured according to KS F 4919. The results are shown in Table 1 below.

Test Example 6: Permeability resistance

In order to compare the water permeability resistance of the powder-type waterproofing materials prepared in Examples 2 and 3 and Comparative Example 1 of the present invention, the water permeability resistance was measured according to KS F 4919. The results are shown in Table 1 below.

Test Example 7: Penetration Depth

The powder-type waterproofing material prepared in Examples 2 and 3 and Comparative Example 1 of the present invention was spray applied to the concrete substrate in an amount of about 0.40 to 0.50 kg/m2 to prepare a coating film, and the penetration depth of the permeable waterproofing material was measured. So, the results are shown in Table 1.

Comparative Example 1
Powder type waterproofing material Example 2
Powder type waterproofing material Example 3
Powder type waterproofing material Adhesion strength (N/mm ² ) standard 2.1 2.5 2.9 After flooding 1.8 2.2 2.7 Resistance to splitting clear clear clear Tensile performance Tensile strength (N/mm ² ) 2.2 2.5 2.8 Elongation rate (%) 54% 67% 72% Crack resistance (-10℃, 20℃) clear clear clear Absorption amount (g) 0.02 0.01 0.005 Permeability resistance Not pitched Not pitched Not pitched Penetration depth (mm) 201 224 247

As seen in Table 1, the powder-type waterproofing material of the present invention was confirmed to have excellent physical properties in all evaluated items compared to the conventional waterproofing material. In particular, the powder-type waterproofing material of Example 3 showed better physical properties.

Claims (6)

55 to 70% by weight of water; 25 to 40% by weight of methyl methacrylate; 0.1 to 0.3% by weight of ammonium persulfate as an initiator; 2 to 5% by weight of at least one surfactant selected from sodium lauryl sulfate (SLS) and sodium laureth sulfate (SLES); and 0.5 to 2% by weight of epoxy resin; a transparent liquid waterproofing composition comprising, and
Based on 100 parts by weight of the transparent liquid waterproofing composition, 70 to 130 parts by weight of the powder composition for filling the waterproofing material is mixed,
The powder composition for filling the waterproofing material includes 10 to 20% by weight of blast furnace slag; 5 to 10% by weight of fly ash; 5 to 15% by weight of calcium aluminate; 5 to 10% by weight of anhydrous gypsum; 3 to 5% by weight of slaked lime; 1 to 3% by weight of at least one selected from calcium hydroxide, sodium hydroxide, and calcium sulfate; 1 to 3% by weight of silica fume; 1 to 5% by weight of cellulose fibers with a length of 500 μm or less; 0.1 to 2% by weight of at least one selected from polypropylene fibers, polyethylene fibers and nylon fibers having a length of 6 mm to 12 mm; 0.1 to 1% by weight of polycarboxylic acid-based fluidizing agent; 3 to 7% by weight of foamed glass powder; And a powder-type waterproofing composition comprising 40 to 60% by weight of silica sand. delete delete According to paragraph 1,
A powder-type waterproofing material composition, characterized in that it further comprises 5 to 15 parts by weight of a copolymer represented by the following formula (1), based on 100 parts by weight of the transparent liquid waterproofing material composition.
[Formula 1]

where a, b and c are mole fractions,
A is 0.3 to 0.5, b is 0.3 to 0.5, c is 0.3 to 0.5, and a+b+c is 1. delete 1) Cleaning the building roof, concrete water tank, or basement floor;
2) Applying a lithium-based concrete reinforcement agent to the cleaned building rooftop, concrete water tank, or basement floor;
3) Filling cracks on the roof of a building, a concrete water tank, or a basement floor with the powder-type waterproofing composition of paragraph 1;
4) Applying the powder-type waterproofing composition of paragraph 1 to the entire rooftop, concrete water tank, or basement floor of the building to be waterproofed; and
5) Applying at least one selected from urea, urethane, color elastic coating waterproofing material, and epoxy for protection of the primary waterproofing layer formed in step 4), composite waterproofing, and exterior appearance; roof of a building, concrete including; Water storage tank or basement floor waterproofing construction method.