KR100909247B1 - Method of constructing concrete floor with water-proof property - Google Patents

Abstract

A method for constructing a concrete floor with water-proof property is provided to prevent the degradation or deterioration of binding strength of a film due to excellent diffusion resistance steam or carbon dioxide, and to secure durability due to excellent drug resistance and chemical resistance. A method for constructing a concrete floor with water-proof property comprises the steps of: mixing a silica emulsion 25-35 parts by weight, a penetrating polymer 30-40 parts by weight and silver particle colloid solution 10-20 parts by weight based on a primer layer 100.0 parts by weight; adding the mixture to combined water 10-30 parts by weight in which gluconic acid solution 0.4-0.8 parts by weight, glycerine 0.1-0.3 parts by weight and sodium aluminate 0.1-0.3 parts by weight are dissolved; applying the obtained homogenate on the primer layer after passing the mixture through a homogenizer of 600-700 kgf/cm^2; and mixing dispersing agent and admixture in a weight ratio of 1:2 - 1:2.5 and coating the top of the primer layer.

Description

Method of constructing concrete floor with water-proof property

The present invention relates to a waterproof construction method of concrete bridges, and more particularly, it is excellent in the diffusion resistance of water vapor or carbon dioxide to prevent a decrease in adhesion strength or deterioration of the coating film, and excellent durability and chemical resistance and chemical resistance It relates to the waterproofing method of concrete bridges.

If concrete surfaces are exposed in concrete structures such as general buildings and factories, the floor surface is crushed or aged due to deterioration of concrete in the long term, causing environmental pollution due to the generation of concrete dust that is harmful to human body.

Therefore, in order to keep the environment of these spaces comfortable, the concrete floor surface of the floor must be improved to suppress the occurrence of cracks or dust.

For this purpose, various flooring materials are currently used, and most of the flooring materials used are synthetic resins such as epoxy and urethane. However, there are so many kinds of synthetic resin series and they are used without proper criteria or analysis on usage and economics. Particularly, synthetic resins such as epoxy and urethane are most often used due to their adhesion to concrete, water resistance, and various properties of other synthetic resins. Due to this, the coated resin material is often peeled or broken. This partial peeling is caused by physical properties between different materials, especially in four-season environment, such as in Korea, caused by temperature and humidity difference, so there is a problem such as increase in construction cost and complaints. Until now, most of the flooring materials are resin resins.

The technical problem to be solved by the present invention is excellent diffusion resistance of water vapor or carbon dioxide can prevent the adhesion strength degradation or deterioration of the coating film, and provides a waterproof construction method of the concrete bridge to ensure durability by excellent chemical resistance, chemical resistance It is.

The present invention to solve the above technical problem,

25 to 35 parts by weight of silica emulsion, 30 to 40 parts by weight of permeable polymer and 10 to 20 parts by weight of silver particle colloidal solution were mixed with 100 parts by weight of the primer layer, and 0.4 to 0.8 parts by weight of aqueous gluconic acid and glycerin (Glycerine). ) 0.1 to 0.3 parts by weight and 0.1 to 0.3 parts by weight of sodium aluminate are added to 10 to 30 parts by weight of dissolved crystallized water and passed through a homogenizer at 600 to 700 kgf / cm 2 at a speed of 200 to 300 m / s. S1 step and then applied with the primer layer, 70 to 80 parts by weight of styrene acrylic copolymer (Styrene Acrylic Copolymer), 1 to 3 parts by weight of silica colloid, polydimethylsiloxane (Poly Dimethyl) Siloxane Emulsion) 2 to 6 parts by weight, 10 to 15 parts by weight of crystal water and 1 to 3 parts by weight of silver particle colloidal solution at 500 to 600 RPM for 10 minutes to 1 hour After the addition of 0.4 to 0.8 parts by weight of polycarboxylic acid water-soluble acrylic copolymer (Polycaboxilc acid copolymer) and 0.2 to 0.6 parts by weight of polyethylene-based nonionic defoamer, 20 to 30 parts by weight of blast furnace cement and zirconium silicate based on 100 parts by weight of admixture (Zirconium silicate) 3 to 4 parts by weight, metakaolin 4 to 10 parts by weight, 3 to 6 parts by weight of n-octyltriethoxy Silane Powder, 50 to 70 parts by weight of silica sand and polyglycol powder defoamer 1 to 5 parts by weight of the admixture is mixed with a weight ratio 1: 2 to 1: 2.5 provides a waterproof method of the concrete bridge, characterized in that it comprises a step S2 applied to the top of the primer layer.

According to an embodiment of the present invention, the silica emulsion is sodium silicate containing sodium oxide (Na ₂ O) and silicon oxide (SiO ₂ ) as soluble silicate (Solicate), polydimethylsiloxane (Polydimethyl) Siloxane), Potassium Methyl Siliconate or Sodium Methyl Siliconate (Sodium Methyl SIliconate) were mixed at about 40 ° C., triethanolamine was added and stirred at a rate of 800 to 2000 RPM for 40 minutes. May be aged to 50 ° C. for 8 hours.

According to another embodiment of the present invention, the permeable polymer is mixed with lithium silicate (Litium Silicate) and sulfate surfactant at 300 to 400 RPM and added to the butyl acrylic styrene copolymer (Buthyl Acrylic-Styrene Copolymer) and crystal water 30 It can be stirred at a rate of 500 to 600 RPM for minutes.

According to another embodiment of the present invention, the silver particle colloidal solution may have an average particle size of 5 to 20 nm, and its concentration may be 1.5 × 10 ⁻³ to 1.5 × 10 ⁻² wt% based on the number of crystals. have.

According to another embodiment of the present invention, the poly dimethyl siloxane emulsion (Poly Dimethyl Siloxane Emulsion) may be a solution of 50% by weight relative to the crystal water.

As described above, the waterproof method of concrete bridges according to the present invention is excellent in the diffusion resistance of water vapor or carbon dioxide can prevent the adhesion strength degradation or deterioration of the coating film, and excellent durability and chemical resistance, chemical resistance is ensured durability Has an effect.

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

Waterproofing method of concrete bridge according to the present invention is mixed with 25 to 35 parts by weight of silica emulsion, 30 to 40 parts by weight of permeable polymer and 10 to 20 parts by weight of silver particle colloidal solution with respect to 100 parts by weight of the primer layer (Gluconic Acid solution) ) 0.4 to 0.8 parts by weight, 0.1 to 0.3 parts by weight of glycerin and 0.1 to 0.3 parts by weight of sodium aluminate are added to 10 to 30 parts by weight of crystallized water, and homogeneous at a pressure of 600 to 700 kgf / cm 2. S1 step of passing through the group at a rate of 200 to 300m / s and then applied to the primer layer, 70 to 80 parts by weight of styrene acrylic copolymer (Styrene Acrylic Copolymer), 1 to 3 by weight of silica colloid Part, 2 to 6 parts by weight of poly dimethyl silica emulsion (Poly Dimethyl Siloxane Emulsion), 10 to 15 parts by weight of crystal water and 1 to 3 parts by weight of silver particle colloidal solution After stirring at 500 to 600 RPM for 10 minutes to 1 hour, 0.4 to 0.8 parts by weight of a polycaboxilc acid copolymer and 0.2 to 0.6 parts by weight of a polyethylene nonionic antifoaming agent were added to 100 parts by weight of the admixture. 20 to 30 parts by weight of blast furnace cement, 3 to 4 parts by weight of zirconium silicate, 4 to 10 parts by weight of metakaolin, 3 to 6 parts by weight of n-octyltriethoxy Silane Powder, 50 to silica The admixture consisting of 70 parts by weight and 1 to 5 parts by weight of a polyglycol-based powder defoamer has a characteristic of comprising a step S2 of stirring at a weight ratio of 1: 2 to 1: 2.5 and applying it to the top of the primer layer.

First of all, step S1 is performed by mixing 25 to 35 parts by weight of silica emulsion, 30 to 40 parts by weight of permeable polymer, and 10 to 20 parts by weight of silver particle colloidal solution with respect to 100 parts by weight of the primer layer, and 0.4 to 0.8 of gluconic acid. Parts by weight, 0.1 to 0.3 parts by weight of glycerin and 0.1 to 0.3 parts by weight of sodium aluminate were added to 10 to 30 parts by weight of crystallized water, and 200 to 300 m / in a homogenizer at a pressure of 600 to 700 kg / cm 2. After passing through at a rate of s it is a step of applying to the primer layer.

Before applying the primer layer, the floor of the concrete bridge floor or the floor of a normal building is cleaned and dried.

In addition, the silica emulsion is used in 25 to 35 parts by weight based on 100 parts by weight of the primer layer, if less than 25 parts by weight of water resistance, porosity can be reduced, on the contrary, if more than 35 parts by weight of silica component on the concrete surface This may precipitate irregularly.

The silica emulsion is sodium silicate containing sodium oxide (Na ₂ O) and silicon oxide (SiO ₂ ) as a soluble silicate (Solicate), polydimethyl silica (Polydimethyl Siloxane), potassium tetramethyl silicate (Potassium Methyl Siliconate) or Sodium Methyl Siliconate (Sodium Methyl SIliconate) were mixed at about 40 ° C, triethanolamine was added and stirred at a rate of 800 to 2000 RPM for 40 minutes, and then aged at 45 to 50 ° C for 8 hours. Can be prepared.

On the other hand, the permeable polymer is used 30 to 40 parts by weight based on 100 parts by weight of the primer layer, if less than 30 parts by weight of the chemical resistance, in particular the resistance to chlorides may be lowered, on the contrary, if it exceeds 40 parts by weight Can be increased to reduce the internal permeability of the concrete of the active ingredient.

The permeable polymer is slowly mixed with lithium silicate and sulfate surfactant at 300 to 400 RPM and added thereto with butyl acrylic styrene copolymer and water of crystallization and stirred at a speed of 500 to 600 RPM for 30 minutes. Can be prepared.

The sulfate surfactant may be sodium octyl sulfate.

Meanwhile, the silver particle colloidal solution may have an average particle size of 5 to 20 nm, and a concentration of 1.5 × 10 ⁻³ to 1.5 × 10 ⁻² wt%, wherein the solvent may be crystal water. If lower than the lower limit, the antimicrobial effect may be reduced, whereas if the upper limit is exceeded, manufacturing cost may increase.

The silver particle colloidal solution is used 10 to 20 parts by weight based on 100 parts by weight of the primer layer, if less than 10 parts by weight can reduce the effect of inhibiting the growth of microorganisms present in the concrete, on the contrary if exceeding 20 parts by weight It can escape the limits of antibacterial properties.

Meanwhile, 0.4 to 0.8 parts by weight of aqueous gluconic acid, 0.1 to 0.3 parts by weight of glycerin, and 0.1 to 0.3 parts by weight of sodium aluminate are dissolved in the crystal water.

Here, the aqueous solution of gluconic acid (Gluconic Acid) is 0.4 to 0.8 parts by weight to 40% by weight with respect to the crystallized water, if less than 0.4 parts by weight may cause problems in the flexibility of the silica component or gel prevention (gel) On the contrary, when it exceeds 0.8 weight part, the hardness of a silica component may fall.

The glycerin (Glycerine) is used in 0.1 to 0.3 parts by weight, if less than 0.1 parts by weight, the plasticity may be lowered, on the contrary, if it exceeds 0.3 parts by weight may increase the absorbency.

In addition, the sodium aluminate (Sodium Aluminate) is used 0.1 to 0.3 parts by weight, if less than 0.1 parts by weight, the concrete pore sealing capacity may be lowered, on the contrary, if more than 0.3 parts by weight, the adsorption power of water due to over-production of zeolite It may rise and water resistance may fall.

Meanwhile, the silica emulsion, the permeable polymer, and the silver particle colloidal solution were mixed with respect to 100 parts by weight of the primer layer as described above, and in addition to 10 to 30 parts by weight of crystal water in which an aqueous solution of gluconate, glycerin, and sodium aluminate were dissolved. After passing through a homogenizer of 600 to 700 kgf / ㎠ pressure at a speed of 200 to 300 m / s is formed by applying a primer layer as a coating material obtained.

Here, if the crystal water is less than 10 parts by weight, the viscosity control power may be reduced, on the contrary, if it exceeds 30 parts by weight, the transmission power of the active ingredient may be reduced.

In addition, the pressure of the homogenizer is 600 to 700 kgf / ㎠, if less than 600 kgf / ㎠, it may be difficult to form a product having a uniform particle size by reducing the dispersing force, on the contrary exceeds 700 kgf / ㎠ If the amount of air increases, it may cause a decrease in physical properties.

In addition, as described above, if the speed passing through the homogenizer is less than 200m / s, the particle size can be increased, on the contrary, if it exceeds 300m / s, unstable physical properties can be expressed by the destruction of the particles.

In addition, the primer layer may be uniformly applied to a thickness of 0.4 to 2 mm, if less than 0.4 mm is difficult to form a coating film is less concealed, on the contrary, if it exceeds 2 mm curing is delayed and the coating film after actual construction Cracking problems can occur.

Next, look at step S2, 70 to 80 parts by weight of styrene acrylic copolymer (Styrene Acrylic Copolymer), 1 to 3 parts by weight of silica colloid, poly dimethyl siloxane emulsion (Poly Dimethyl Siloxane Emulsion) 2 To 6 parts by weight, 10 to 15 parts by weight of crystal water, and 1 to 3 parts by weight of the silver particle colloidal solution at 500 to 600 RPM for 10 minutes to 1 hour, and then polycaboxilc acid copolymer (Polycaboxilc acid copolymer) 0.4 to 0.8 20 to 30 parts by weight of blast furnace cement, 3 to 4 parts by weight of zirconium silicate, 4 to 10 parts by weight of metakaolin, to 100 parts by weight of the dispersant added to 0.2 to 0.6 parts by weight of polyethylene-based nonionic antifoaming agent. 3 to 6 parts by weight of octyl triethoxy silane (n-octyltriethoxy Silane Powder), 50 to 70 parts by weight of silica sand and 1 to 5 of the polyglycol powder antifoaming agent The admixture comprising parts a weight ratio of 1: 2 to 1: 2.5 by stirring with a step of applying on top of the primer layer.

70 to 80 parts by weight of Styrene Acrylic Copolymer (Styrene Acrylic Copolymer) is used with respect to 100 parts by weight of the dispersant, if less than 70 parts by weight, the adhesion and tensile strength is reduced, on the contrary greater than 80 parts by weight may increase the flexibility .

The styrene acrylic copolymer may have a glass transition temperature (Tg) of −6 ± 1 ° C., a viscosity of 140 to 200 mpas, an average particle size of 0.2 μm, and a solid content of 57 ± 1%.

In addition, the silica colloid uses a solution in which the silicon dioxide (SiO ₂ ) is 18 to 30% by weight and the average particle size of the silicon dioxide 5 to 200nm with respect to the crystal water, the amount is 1 to 3 parts by weight.

Here, when the content of the silicon dioxide is out of the ability to improve the physical properties may be reduced, in particular, when the average particle size exceeds 200nm, the bonding strength with the polymer may be reduced. In addition, if the amount of the silica colloid is less than 1 part by weight, the expression of the effect may be insignificant, on the contrary, if it exceeds 3 parts by weight, the viscosity may increase.

In addition, the polydimethyl siloxane emulsion (Poly Dimethyl Siloxane Emulsion) is a solution of 50% by weight with respect to the crystallized water is used is 2 to 6 parts by weight. If it is less than 2 parts by weight, the water repellency may be lowered. On the contrary, if it exceeds 6 parts by weight, the viscosity may rise and the acidity may increase.

The crystal water is used 10 to 15 parts by weight, if outside this range it can be difficult to control the viscosity.

In addition, the silver particle colloidal solution may be the same as that used in the above-described step S1, the silver particle colloidal solution is used 1 to 3 parts by weight, if less than 1 part by weight, the antibacterial effect may be insignificant, On the contrary, exceeding 3 parts by weight may result in an increase in manufacturing cost.

As described above, the styrene acrylic copolymer, the silica colloid, the polydimethylsiloxane emulsion, the crystal water and the silver particle colloidal solution were stirred at 500 to 600 RPM for 10 minutes to 1 hour based on 100 parts by weight of the dispersant. If it is less than 10 minutes or 500 rpm, uniform dispersion may be difficult and conversely, bubbles may be generated if it exceeds 1 hour or 600 rpm.

Subsequently, 0.4 to 0.8 parts by weight of the polycarboxylic acid water-soluble acrylic copolymer (Polycaboxilc acid copolymer) and 0.2 to 0.6 parts by weight of the polyethylene-based nonionic antifoaming agent are added, and the polycarboxylic acid water-soluble acrylic copolymer has 40% by weight of crystal water. If the concentration is from 0.4 to 0.8 parts by weight, if less than 0.4 parts by weight, plasticity may be lowered, and if it exceeds 0.8 parts by weight, condensation of the cement may be delayed.

In addition, when the polyethylene-based nonionic antifoaming agent is less than 0.2 parts by weight, antifoaming may be reduced, and conversely, when it exceeds 0.6 parts by weight, the adhesion may be reduced.

On the other hand, the dispersant is a mixture of blast furnace cement, zirconium silicate, metakaolin, octyl triethoxy silane (n-octyltriethoxy Silane Powder), silica sand and polyglycol-based powder defoamer is stirred, the weight ratio is Dispersant: The admixture is 1: 2 to 1: 2.5. If it is less than 1: 2, the lack of admixture may degrade the physical properties. On the contrary, if it exceeds 1: 2.5, the workability may be poor.

The blast furnace cement is used 20 to 30 parts by weight with respect to 100 parts by weight of the admixture, if less than 20 parts by weight, the strength may be lowered. Can be.

In addition, if the zirconium silicate is less than 3 parts by weight with respect to 100 parts by weight of the admixture, strength and chemical resistance may be lowered.

In addition, the metakaolin is used 4 to 10 parts by weight, if less than 4 parts by weight, the pozzolanic reaction and polymer filling properties may be lowered, on the contrary, when more than 10 parts by weight, the workability may deteriorate due to an increase in viscosity.

The octyl triethoxy silane (n-octyltriethoxy Silane Powder) is used in 3 to 6 parts by weight, if less than 3 parts by weight, may cause problems in water resistance or water repellency, on the contrary, in excess of 6 parts by weight will cause deterioration in adhesion Can be.

In addition, the silica sand is used in 50 to 70 parts by weight, if less than 50 parts by weight, the wear resistance may be reduced, on the contrary, if it exceeds 70 parts by weight may increase the porosity.

In addition, the polyglycol-based antifoaming agent is used in an amount of 1 to 5 parts by weight, but if less than 1 part by weight, the defoaming property may be insignificant.

The above admixture composed of the above-mentioned blast furnace cement, zirconium silicate, metakaolin, octyltriethoxysilane, silica sand, and polyglycol-based powder antifoaming agent with respect to the dispersant Stirring at a weight ratio of 1: 2 to 1: 2.5 to apply to the top of the primer layer, if less than 1: 2, it may be difficult to increase the thickness of the coating film, on the contrary 1: 1: 2.5 may cause poor workability Can be.

In addition to the compositions described above, additives commonly used in the art may be used. These additives include pigments, crosslinkers, fillers, antisettling agents, impact strength modifiers, flame-proofing agents, stabilizers, age-protecting agents, antioxidants, anti-ozonating agents, light protecting agents light protection agents, UV stabilizers, UV absorbers, inorganic thermal stabilizers, organic thermal stabilizers, optical lighteners, processing aids, flow aids, lubricants, mold-release agents release agents, softeners, pigments, colorants, marking materials and the like.

Hereinafter, preferred examples are provided to aid in understanding the present invention. However, the following examples are merely provided to more easily understand the present invention, and the contents of the present invention are not limited by the examples.

Example 1

Silica Emulsion (Content: Sodium Silicate 37.4 wt%, Polydimethyl Siloxane 45.3 wt%, Potassium Methyl Siliconate 15 wt%, Triethanolamine 2.3 wt% %) 30 parts by weight, permeable polymer (content: 17.7% by weight of lithium silicate, 12% by weight of sodium octyl sulfate, 24% by weight of butylacrylstyrene copolymer and 46.3% by weight of crystal water) 35 parts by weight of silver colloidal solution (silver particles) Size: average diameter 5 ~ 20 nm, content 1.5 × 10 ^-3 % by weight, manufactured by NanoPoly) 15 parts by weight of 40% by weight of Glucoic acid solution (Gluconic Acid) 0.5 parts by weight, glycerin (Glycerine) 0.2 parts by weight Part and 0.3 parts by weight of sodium aluminate were added to 29 parts by weight of dissolved crystal water and passed through a homogenizer at a pressure of 600 kgf / cm 2 at a rate of 200 m / s, and then applied to form a primer layer. Next, 75 parts by weight of Styrene Acrylic Copolymer, silica colloid (content: 20% by weight of silicon dioxide (SiO ₂ ), 2 parts by weight of average particle size 20nm), polydimethylsiloxane Poly Dimethyl Siloxane Emulsion (50% by weight of solid content, aqueous solution water repellent (TEGOSIVIN HE899), manufactured by Tegochem Co., Ltd.) 5 parts by weight, 13 parts by weight of crystal water and silver particle colloidal solution (size of silver particles: average diameter 5-20 nm , Content 1.5 × 10 ^-3 wt%, manufactured by Nanopoly) 2 parts by weight at 600 RPM for 40 minutes, and then 0.5 parts by weight of polycarboxylic acid water-soluble acrylic copolymer (Polycaboxilc acid copolymer) (manufactured by BASF, SOCOLAN HP80) 25 parts by weight of blast furnace cement, 4 parts by weight of zirconium silicate, 6 parts by weight of metakaolin, n-octyltriethoxy Silane Powder ) 5 parts by weight, The admixture consisting of 60 parts by weight of silica sand and 3 parts by weight of a polyglycol-based powder antifoaming agent (AGITAN P803, manufactured by Munjing Chem) was stirred at a weight ratio of 1: 2 with respect to the dispersant and coated on top of the primer layer to waterproof the concrete bridge. .

Experimental Example 1 Compressive Strength, Adhesion Strength and Chemical Resistance

The compressive strength, adhesion strength, and chemical resistance of the concrete bridges constructed by Example 1, which were tested by the Korea Institute of Construction Materials, are shown in Table 1 below.

Test Items unit result Test Methods Adhesion strength N / mm2 2.1 KS F 4925 (2001) Compressive strength N / mm2 48.2 28 days after application Chemical resistance 5% MgSO ₄ clear ASTM C267-92 10% Cacl ₂ clear

Referring to Table 1, the concrete bridges constructed in accordance with the present invention can be seen that the adhesion strength, compressive strength and chemical resistance is excellent.

Experimental Example 2 Diffusion Resistance and Chemical Resistance

The diffusion resistance and the chemical resistance which were tested by the test method indicated below for the concrete bridge constructed by Example 1 are shown in Tables 2 and 3 below.

Item result Test Methods Application rate 3kg / ㎡ KS F 4925 Carbon dioxide diffusion resistance RB = 412 Water vapor diffusion resistance SD = 3.0 mm

Item Concentration (% by weight) Optimal rate result Test Methods Calcium chloride 20 2.8 clear 20 days left Saline 23 2.5 clear Calcium hydroxide 0.1 2.3 clear Sodium hydroxide 2 3.8 clear Sulfuric acid 2 5.0 clear Hydrochloric acid 2 5.6 clear tap water - 3.2 -

Referring to Tables 2 and 3, it can be seen that the concrete bridges constructed according to the present invention have excellent diffusion resistance and chemical resistance.

Claims (5)

25 to 35 parts by weight of silica emulsion, 30 to 40 parts by weight of permeable polymer and 10 to 20 parts by weight of silver particle colloidal solution were mixed with 100 parts by weight of the primer layer, and 0.4 to 0.8 parts by weight of Gluconic Acid and glycerin (Glycerine). ) 0.1 to 0.3 parts by weight and 0.1 to 0.3 parts by weight of sodium aluminate are added to 10 to 30 parts by weight of dissolved crystallized water and passed through a homogenizer at 600 to 700 kgf / cm 2 at a speed of 200 to 300 m / s. S1 step of applying after the primer layer; 70 to 80 parts by weight of styrene acrylic copolymer, 1 to 3 parts by weight of silica colloid, 2 to 6 parts by weight of poly dimethyl silica emulsion, water of crystallization based on 100 parts by weight of dispersant To 15 parts by weight and 1 to 3 parts by weight of the silver particle colloidal solution at 500 to 600 RPM for 10 minutes to 1 hour, followed by 0.4 to 0.8 parts by weight of polycaboxilc acid copolymer and polyethylene-based nonionic defoamer 0.2 20 to 30 parts by weight of blast furnace cement, 3 to 4 parts by weight of zirconium silicate, 4 to 10 parts by weight of metakaolin, octyltriethoxysilane (n- octyltriethoxy Silane Powder) 3 to 6 parts by weight, 50 to 70 parts by weight of silica sand and 1 to 5 parts by weight of a polyglycol powder antifoaming agent Waterproofing method of the concrete bridge comprising a; S2 step of applying a weight ratio 1: 2 to 1: 2.5 to the upper portion of the primer layer by stirring. delete The method of claim 1, The permeable polymer is mixed with lithium silicate (Litium Silicate) and sulfate surfactant at 300 to 400 RPM, and added to the butyl acrylic styrene copolymer (Buthyl Acrylic-Styrene Copolymer) and crystal water to be stirred at a speed of 500 to 600 RPM for 30 minutes Waterproofing method of the concrete bridge, characterized in that. The method of claim 1, The silver particle colloidal solution has a mean particle size of 5 to 20nm, the concentration is 1.5 × 10 ^-3 ~ 1.5 × 10 ^-2 % by weight based on the number of crystals waterproofing method of concrete bridges. The method of claim 1, The polydimethyl siloxane emulsion (Poly Dimethyl Siloxane Emulsion) is a waterproof method of concrete bridges, characterized in that the solution of 50% by weight with respect to the crystal water.