KR102093646B1 - Eco-friendly inorganic penetrative waterproof and anti-corrosive composition and waterproof and anti-corrosive construction method for concrete structure therewith - Google Patents

Abstract

The present invention provides an environmentally friendly penetration type inorganic waterproof and anticorrosive composition and a waterproof and anticorrosive construction method of a concrete structure using the same. The environmentally friendly penetration type inorganic waterproof and anticorrosive composition includes 1 to 70 wt% of nano silica aqueous dispersion, 1 to 30 wt% of inorganic mixed material dispersion, 1 to 20 wt% of alkali silicate aqueous solution, 1 to 10 wt% of an aqueous chelating agent, 0.1 to 5 wt% of a surfactant, and 1 to 30 wt% of aqueous solution of alkoxysilane aqueous solution having a water-repellent functional group with respect to the environmentally friendly penetration type inorganic waterproof and anticorrosive composition. The present invention: has excellent permeability, strength, abrasion resistance, water resistance, corrosion resistance, ozone resistance, chlorine ion penetration resistance, fouling resistance, non-flammability, solvent resistance, and cleaning properties; and is able to obtain a cost reduction effect by enabling construction even when an adherend is wet as a room temperature curing type and thus, shortening a construction period without a necessity to be dried like existing organic resin.

Description

ECO-FRIENDLY INORGANIC PENETRATIVE WATERPROOF AND ANTI-CORROSIVE COMPOSITION AND WATERPROOF AND ANTI-CORROSIVE CONSTRUCTION METHOD FOR CONCRETE STRUCTURE THEREWITH}

The present invention relates to an environmentally friendly penetration-type inorganic waterproofing / corrosion-resistant composition and a waterproofing / corrosion-proofing method of a concrete structure using the same, more specifically, permeability, strength, abrasion resistance, corrosion resistance, non-flammability, ozone resistance, UV resistance, salt resistance, It relates to an environmentally friendly penetration-type inorganic waterproof / corrosion-resistant composition excellent in neutralization resistance, freeze-thaw resistance and durability, and a waterproofing / corrosion method for concrete structures using the same.

Concrete structures have reduced resistance to atmospheric conditions such as water, carbon dioxide, chlorine ions, ultraviolet rays, etc. over time, contraction and expansion are repeated according to temperature changes, and various chemicals, air and moisture Cracks are generated by the chemical reaction of and eventually leak. In addition, the aging of the concrete structure is progressing faster by contact with salt, acid gas, or direct acid waste water. In addition, aging is progressing not only in facilities that can be identified externally, but also in underground buried facilities or underwater structures. Various materials and methods have been developed and applied to repair the deteriorated cross section of a concrete structure exposed under such a harsh environment, but the durability of the acid environment is still insufficient.

Therefore, in order to protect the surface of such a concrete structure, it is protected using an infiltration type, a coating type method.

The penetration method uses materials prepared by adding various solvents to silane and silicone resins, but the penetration depth is low, resulting in insufficient water resistance, and the work is difficult due to the smell of the solvent added in a closed space. There are problems such as impossibility of painting on the surface.

In the coating method, a paint composed of an organic component is generally used. In the case of a paint composed of an organic component, there is an advantage of good processability and excellent adhesion and flexibility, but the construction cost is very high and the adhesion to the concrete surface decreases. , Oxidation and aging occurs due to the cutting of carbon chains by ultraviolet rays, and it has the potential to cause environmental pollution and safety problems due to the excitation phenomenon due to the movement of moisture on the concrete surface, difficulty in construction, and the use of organic solvents. The coating material of the organic component does not harden when the surface water content of the concrete is 5% or more, so the surface must be completely dried, so the construction period is long and the thermal expansion coefficient with the concrete is different, making it difficult to perform any action and peeling over a long period of time. It has a prone problem.

In addition, when a concrete waterproofing agent is used as a waterproofing method for a concrete structure, organic and inorganic waterproofing agents are commercially available, but in the case of the inorganic type, if water glass is the main component and there is moisture as in an underground structure, it may elute and lose water resistance. When mixed with concrete, the total amount of alkali increases, which has a fatal effect on the durability of concrete. In the case of the organic system, most of the organic silicone is emulsified in water, and dispersion is very difficult inside the concrete.

Registered Patent No. 10-1355034 (2014.01.13.) Registered Patent No. 10-1371345 (2014.03.03.) Registered Patent No. 10-1940995 (January 16, 2019) Registered Patent No. 10-1971118 (2019.04.16.)

The problem to be solved by the present invention is an environment-friendly penetration-type inorganic waterproofing / excellent durability excellent in permeability, strength, abrasion resistance, water resistance, corrosion resistance, chlorine ion penetration resistance, acid resistance, non-flammability, alkali resistance, fouling resistance, ozone resistance, and UV resistance. Since the durability is excellent by using the ash composition, it is possible to prevent corrosion, deterioration, etc. of the concrete structure in a harsh environment, and it is an eco-friendly penetration-type inorganic waterproof and anticorrosive material that can obtain an effect that can significantly reduce the maintenance cost used for this. It is to provide a method for waterproofing and anticorrosive construction of a composition and a concrete structure using the composition.

In order to achieve the above-described problems, the present invention is an environmentally friendly penetration-type inorganic waterproof / corrosion-resistant material for improving permeability, strength, abrasion resistance, water resistance, corrosion resistance, ultraviolet resistance, ozone resistance, chlorine ion penetration resistance, contamination resistance, non-combustibility, etc. It provides a method for waterproofing and anticorrosive construction of a composition and a concrete structure using the composition.

The eco-friendly permeable inorganic waterproofing and anticorrosive composition may include a nano silica aqueous dispersion, an inorganic mixture dispersion, an alkali silicate solution, an aqueous chelating agent, a surfactant, and a silicate solution having a water repellent functional group.

The eco-friendly penetration-type inorganic waterproofing and anticorrosive composition is 1 to 70% by weight of a nano silica aqueous dispersion, 1 to 30% by weight of an inorganic mixture dispersion, and 1 to 20% by weight of an alkali silicate solution relative to the eco-friendly penetration-type inorganic waterproofing and anticorrosive composition. , 1 to 10% by weight of an aqueous chelating agent, 0.1 to 5% by weight of a surfactant and 1 to 30% by weight of an alkoxysilane solution having a water-repellent functional group at a predetermined temperature (for example, room temperature to 60 ° C) for a predetermined time (for example, 2 to 24 hours) ) Can be prepared by stirring and mixing.

The nano silica aqueous dispersion is used to improve durability by forming a coating film on a concrete surface. The nano-silica aqueous dispersion, alkoxy silane (R ¹ _n Si (OR ² ) _4-n ) on the surface of the particles of the aqueous silica sol Is added to cause a hydrolysis reaction to be partially hydrophobized.

The inorganic mixture dispersion is used to fill the voids in the concrete to improve strength and durability. It is preferable that the inorganic mixture contains 65 to 99% by weight of calcium carbonate having a size of 100 nm, 0.1 to 20% by weight of sodium hexafluorosilicate, and 0.01 to 15% by weight of titanium dioxide.

The aqueous alkali silicate solution is used to improve strength and durability by reacting with cement hydrate present in the concrete. It is preferable to use sodium silicate or calcium silicate as the alkali silicate.

The aqueous chelating agent is used to improve the stability of the composition by improving the stability of the nano-silica aqueous dispersion and the inorganic mixture dispersion. The aqueous chelating agent is preferably used to select any one of EDTA-2Na, EDTA-4Na, ethylenediamine.

The surfactant is used to lower the surface tension of the composition so that the composition penetrates deep into the concrete. The surfactant is polyoxyethylene (10) cetyl / stearyl ether, polyoxyethylene (6) cetyl / stearyl ether, polyoxyethylene (6) cetyl / stearyl ether, polyoxy Polyethylene (6) cetyl ether, Polyoxyethylene (12) cetyl ether, Polyoxyethylene (4) isodecyl ether, Polyoxyethylene (4) isodecyl ether, Polyoxyethylene (12) isodecyl ether, polyoxyethylene (6) isolauryl ether, polyoxyethylene (6) isolauryl ether, polyoxyethylene (5) isostearyl ether (Polyoxyethylene (5) ) isostearyl ether), polyoxyethylene (3) oleyl ether, polyoxyethylene (11) oleyl ether (Polyoxyethylene (11) oleyl ether), polyoxyethylene (5) octyldodecyl Polyoxyethylene (5) octyldodecyl ether and polyoxyethylene (10) It is preferable to use one or more from the group consisting of octyldodecyl ether (Polyoxyethylene (10) octyldodecyl ether).

The aqueous solution of the alkoxysilane having the water-repellent functional group is used to prevent water penetration from the outside by forming a coating film on the concrete surface. As the alkoxysilane having the water-repellent functional group, it is preferable to use octyltrimethoxysilane or decyltrimethoxysilane.

In addition, the present invention, the step of removing the rust, impurities, etc. on the surface of the concrete by chipping (Chipping) with a water jet, a grinder, and the environment-friendly penetration-type inorganic waterproof / anticorrosive composition primary on the chipped surface Provides a method of waterproofing and anticorrosion of a concrete structure, which includes curing by applying a second coating of the inorganic coating composition after curing by coating.

According to the present invention, excellent in permeability, strength, abrasion resistance, water resistance, corrosion resistance, ozone resistance, chlorine ion permeation resistance, contamination resistance, non-flammability, solvent resistance, and cleaning properties, and at room temperature curing type, it is possible to construct even when the adherend is wet Therefore, as it does not need to be dried as in the existing organic resin, the construction period can be shortened, thereby reducing the cost.

In addition, it enhances durability by blocking corrosion and other deterioration factors of the concrete structure, and it can express the function of non-combustible and anti-corrosive coating materials to protect the concrete structure in case of fire. It can provide a method of waterproofing and anticorrosive construction of concrete structures.

Hereinafter, preferred embodiments according to the present invention will be described in detail. However, the following embodiments are provided to those skilled in the art to fully understand the present invention and can be modified in various other forms, and the scope of the present invention is limited to the embodiments described below. It does not work.

The environmentally friendly penetration-type inorganic waterproof / corrosive composition according to the preferred embodiment of the present invention may include a nano silica aqueous dispersion, an inorganic mixture dispersion, an alkali silicate solution, an aqueous chelating agent, a surfactant, and a silicate solution having a water-repellent functional group. have.

The nano-silica aqueous dispersion, alkoxy silane (R ¹ _n Si (OR ² ) _4-n ) on the surface of the particles of the aqueous silica sol Is added to make a hydrolysis reaction. In the molecular formula R ¹ _n Si (OR ² ) _4-n of the alkoxy silane R ¹ is an organic group having 1 to 8 carbon atoms, and R ² represents an alkyl group having 1 to 5 carbon atoms or an acyl group having 1 to 4 carbon atoms. For the hydrolysis reaction, a solvent and a catalyst may be used. As the solvent, alcohols such as ethanol or water may be used, and an acid or alkali catalyst may be used as the catalyst. Hydrochloric acid (HCl), sulfuric acid (H ₂ SO ₄ ), nitric acid (HNO ₃ ), acetic acid (CH ₃ COOH), etc. can be used as the acid-based catalyst, and ammonium hydroxide (NH ₄ OH), sodium hydroxide as the alkaline catalyst (NaOH), potassium hydroxide (KOH), or an organic amine. At this time, the aqueous silica sol is added about 5 to 60 parts by weight, preferably about 20 to 40 parts by weight. The alkoxy silane is added in about 1 to 50 parts by weight, preferably about 5 to 20 parts by weight. The solvent is added to about 30 to 40 parts by weight, and the catalyst is added to about 0.1 to 10 parts by weight. The hydrolysis reaction can be carried out at a temperature of about 20 ~ 90 ℃.

The hydrolyzate is produced on the surface of the particles of the aqueous silica sol by the hydrolysis, and a polycondensation reaction can be performed to obtain a partially hydrophobic nano silica aqueous dispersion. By treating the aqueous silica sol with an alkoxy silane, the silica particles are partially hydrophobized to express hydrophilic and hydrophobic properties.

The alkoxy silane (R ¹ _n Si (OR ² ) _4-n ) used for partial hydrophobization of the particle surface of the aqueous silica sol is methyltrimethoxysilane, methyltriethoxysilane, methyltripropoxy Silane, dimethyldimethoxysilane, dimethyldiethoxysilane, phenyltrimethoxysilane, phenyltriethoxysilane, diphenyldimethoxysilane, diphenyldiethoxysilane, triphenylmethoxysilane, triphenyl Ethoxysilane, ethyltriethoxysilane, propylethyltrimethoxysilane, vinyltrimethoxysilane, vinyltriethoxysilane, vinyltripropoxysilane, N- (3-acryloxy-2-hydroxypropyl)- 3-aminopropyltrimethoxysilane, N- (3-acryloxy-2-hydroxypropyl) -3-aminopropyltriethoxysilane, N- (3-acryloxy-2-hydroxypropyl) -3- Aminopropyltripropoxysilane, 3-acryloxypropylmethylbis (trimethoxy) silane, 3-arc Oxypropyltrimethoxysilane, 3-acryloxypropyltriethoxysilane, 3-acryloxypropyltripropoxysilane, 3- (meth) acryloxypropyltrimethoxysilane, 3- (meth) acryloxypropyltrip Methoxysilane, 3- (meth) acryloxypropyltripropoxysilane, N- (aminomethyl-3-aminopropyl) trimethoxysilane, N- (aminomethyl-3-aminopropyl) triethoxysilane, At least one selected from the group consisting of 3-aminopropyl trimethoxysilane, 3-aminopropyl triethoxysilane, chloropropyl trimethoxysilane, crawlropropyl triethoxysilane, heptadecafluordecyl trimethoxysilane, etc. It may, but may not be limited to this.

In the eco-friendly penetration-type inorganic waterproofing and anticorrosive composition, the inorganic mixture dispersion fills voids in the concrete to improve strength and durability. It is preferable that the inorganic mixture dispersion contains 1 to 30% by weight with respect to the eco-friendly penetration-type inorganic waterproofing and anticorrosive composition. It is preferable that the inorganic mixture contains 65 to 99% by weight of calcium carbonate having a size of 100 nm, 0.1 to 20% by weight of sodium hexafluorosilicate, and 0.01 to 15% by weight of titanium dioxide.

The aqueous alkali silicate solution is used to improve strength and durability by reacting with cement hydrate present in the concrete. It is preferable that the aqueous alkali silicate solution contains 1 to 20% by weight based on the environmentally friendly penetration-type inorganic waterproofing and anticorrosive composition. It is preferable to use sodium silicate or calcium silicate as the alkali silicate.

The aqueous chelating agent is used to improve the stability of the composition by improving the stability of the nano-silica aqueous dispersion and the inorganic mixture dispersion. It is preferable that the aqueous chelating agent contains 1 to 10% by weight based on the environmentally friendly penetration-type inorganic waterproofing and anticorrosive composition. The aqueous chelating agent is preferably used to select any one of EDTA-2Na, EDTA-4Na, ethylenediamine.

For reference, Ethylene di-amine tetra-acetic acid (EDTA) is a material widely used in various industries and is well known as a chelating agent for salt products. In general, the commercially available form of EDTA has a white solid crystalline form, in particular, EDTA-2Na is a disodium salt, the chemical formula is C ₁₀ H ₁₄ N ₂ Na ₂ O ₈ , and EDTA-4Na is a tetrasodium salt. As the chemical formula is C ₁₀ H ₁₂ N ₂ Na ₄ O ₈ .

The surfactant is used to lower the surface tension of the composition so that the composition penetrates deep into the concrete. It is preferable that the surfactant contains 0.1 to 5% by weight relative to the eco-friendly permeable inorganic waterproofing and anticorrosive composition. The surfactant is polyoxyethylene (10) cetyl / stearyl ether, polyoxyethylene (6) cetyl / stearyl ether, polyoxyethylene (6) cetyl / stearyl ether, polyoxy Polyethylene (6) cetyl ether, Polyoxyethylene (12) cetyl ether, Polyoxyethylene (4) isodecyl ether, Polyoxyethylene (4) isodecyl ether, Polyoxyethylene (12) isodecyl ether, polyoxyethylene (6) isolauryl ether, polyoxyethylene (6) isolauryl ether, polyoxyethylene (5) isostearyl ether (Polyoxyethylene (5) ) isostearyl ether), polyoxyethylene (3) oleyl ether, polyoxyethylene (11) oleyl ether (Polyoxyethylene (11) oleyl ether), polyoxyethylene (5) octyldodecyl Polyoxyethylene (5) octyldodecyl ether and polyoxyethylene (10) It is preferable to use one or more from the group consisting of octyldodecyl ether (Polyoxyethylene (10) octyldodecyl ether).

The aqueous solution of the alkoxysilane having the water-repellent functional group is used to prevent water penetration from the outside by forming a coating film on the concrete surface. It is preferable that the aqueous solution of the alkoxysilane having the water-repellent functional group contains 1 to 30% by weight with respect to the eco-friendly permeable inorganic waterproofing and anticorrosive composition. As the alkoxysilane having the water-repellent functional group, it is preferable to use octyltrimethoxysilane or decyltrimethoxysilane.

Hereinafter, a method of manufacturing an eco-friendly penetration-type inorganic waterproof / corrosion-resistant composition according to a preferred embodiment of the present invention will be described.

The environmentally friendly penetration-type inorganic waterproofing and anticorrosive composition according to a preferred embodiment of the present invention comprises 1 to 70% by weight of a nano silica aqueous dispersion, 1 to 30% by weight of an inorganic mixture dispersion, 1 to 20% by weight of an aqueous alkali silicate solution, and an aqueous chelating agent 1 ~ 10% by weight, 0.1 to 5% by weight of a surfactant and 1 to 30% by weight of an alkoxysilane aqueous solution having a water-repellent functional group are stirred and mixed for a predetermined time (e.g., 2 to 24 hours) at a predetermined temperature (e.g. room temperature to 60 ° C) Can be produced.

Hereinafter, a method of waterproofing and anticorrosive construction of a concrete structure according to the present invention will be described.

The method of waterproofing and anticorrosive construction of a concrete structure according to the present invention is a method of waterproofing and anticorrosive using the environmentally friendly penetration-type inorganic waterproofing and anticorrosive composition according to the present invention as described above, firstly, the raytans and impurities on the surface of concrete Chipping the back with a water jet, a grinder, etc., and forming the primary penetrating coating layer by first applying and curing the eco-friendly permeable inorganic waterproofing and anticorrosive composition on the chipped surface area, and , Secondarily applying the inorganic coating composition on the cured primary penetration-type coating layer to form a secondary coating layer and curing.

At this time, in the step of removing by chipping, the deterioration part or crack of the concrete may further include a step of repairing a general super hard polymer cement mortar or epoxy putty.

The concrete structure constructed according to this method, the components of the primary penetration type coating layer formed by applying the eco-friendly penetration type inorganic waterproofing and anticorrosive composition, are allowed to penetrate into the voids in the concrete from the surface of the concrete structure during the application and curing process. Accordingly, the strength, abrasion resistance, water resistance, corrosion resistance, chlorine ion penetration resistance, acid resistance, non-flammability, alkali resistance, fouling resistance, ozone resistance, and UV resistance of the concrete structure can be improved, thereby increasing its durability. In addition, the secondary coating layer formed by coating the inorganic coating composition is not directly applied to the surface of the concrete structure, but is coated on the primary penetration coating layer composed of the eco-friendly penetration-type inorganic waterproofing and anticorrosive composition according to the present invention, as well as the surface of the concrete structure. In addition, it serves to protect the primary penetration-type coating layer. Here, since both the primary penetration type coating layer and the secondary coating layer are inorganic compositions, mutual adhesion is good and physical properties are relatively similar, so that they can cooperate with each other to further increase the durability of the surface of the concrete structure. Accordingly, it is possible to obtain an effect of significantly reducing maintenance costs by efficiently preventing corrosion and deterioration of a concrete structure in a poor environment such as underground buried facilities or underwater structures as well as facilities exposed to the outside.

Hereinafter, embodiments of the eco-friendly penetration-type inorganic waterproofing and anticorrosive composition according to the present invention are presented in more detail, and the present invention is not limited by the following examples.

Preparation Example 1: Preparation of aqueous nano-silica dispersion

3.5 kg of aqueous silica sol (trade name: HS-30, Grace Corporation) was added and stirred in a 5 liter reactor, and while maintaining the reactor temperature at about 60 ° C., chloropropyl trimethoxysilane (reagent class) 0.4 kg, which is a type of alkoxy silane. Is added at a rate of 20 ml / min using a metering pump, and partially hydrolyzed and polymerized for 12 hours at that temperature to form a partially hydrophobized nano silica aqueous dispersion and cooled to room temperature. The cooling was carried out by naturally cooling the partially hydrophobized nano-silica aqueous dispersion at room temperature. For the hydrolysis, a solvent and a catalyst may be used, and ethanol is used as the solvent and hydrochloric acid (HCl), which is an acid-based catalyst, is used as the catalyst. About 35 parts by weight of solvent is added, and about 1 part by weight of catalyst is added.

Production Example 2: Inorganic mixture dispersion

7 kg of pure water (e.g., distilled water) is added to a 10 liter reactor equipped with a cooling water jacket and 80% by weight of calcium carbonate and 10% by weight of sodium hexafluorosilicate while maintaining the temperature of the reactant at 50 ° C while circulating the cooling water in the jacket of the reactor 3.5 kg of an inorganic mixture composed of 10% by weight of titanium dioxide was slowly added and stirred for 2 hours to prepare an inorganic mixture dispersion.

Preparation Example 3: Alkaline silicate aqueous solution

7 kg of pure water is added to a 10 liter reactor equipped with a cooling water jacket and 1.0 kg of sodium silicate or calcium silicate is slowly added while circulating the cooling water to the jacket of the reactor while maintaining the temperature of the reactant at 25 ° C. and stirred for 2 hours to prepare an aqueous alkali silicate solution. To manufacture.

Preparation Example 4: Aqueous solution of alkoxysilane having water-repellent functional group

3kg of ethanol and 3kg of pure water were added to a 10L reactor equipped with a cooling water jacket, and 1.0kg of octyltrimethoxysilane or decyltrimethoxysilane was slowly added while maintaining the temperature of the reactant at 50 ° C while circulating the cooling water in the jacket of the reactor. By stirring for 2 hours to prepare an aqueous solution of an alkoxysilane having a water-repellent functional group.

<Example 1>

500 kg of the prepared calcium silicate aqueous solution after stirring for 3 hours by adding 1.0 kg of the prepared inorganic silica dispersion of 50% solid content at a rate of 10 ml / min while adding and stirring 7.0 kg of the prepared nano silica aqueous dispersion into a 10 L reactor Was added at a rate of 5 ml / min and stirred for 2 hours, 500 g of EDTA-2Na as an aqueous chelating agent was added and stirred for 2 hours, and polyoxyethylene (10) cetyl / stearyl ether (Polyoxyethylene (10) cetyl / stearyl) ether) 50 g is stirred for 2 hours, 1.0 kg of the alkoxysilane aqueous solution having the above-described water-repellent functional group is added at a rate of 5 ml / min, and mixed for 2 hours to prepare.

<Example 2>

500 kg of the prepared calcium silicate aqueous solution after stirring for 3 hours by adding 1.0 kg of the prepared inorganic silica dispersion of 50% solid content at a rate of 10 ml / min while adding and stirring 7.0 kg of the prepared nano silica aqueous dispersion into a 10 L reactor Was added at a rate of 5 ml / min and stirred for 2 hours, 500 g of EDTA-4Na as an aqueous chelating agent was added and stirred for 2 hours, and polyoxyethylene (6) cetyl / stearyl ether (Polyoxyethylene (6) cetyl / stearyl) ether) 50 g was added and stirred for 2 hours, and 1.0 kg of the alkoxysilane aqueous solution having the above-described water-repellent functional group was added at a rate of 5 ml / min to prepare for mixing for 2 hours.

<Example 3>

500 kg of the prepared calcium silicate aqueous solution after stirring for 3 hours by adding 1.0 kg of the prepared inorganic silica dispersion of 50% solid content at a rate of 10 ml / min while adding and stirring 7.0 kg of the prepared nano silica aqueous dispersion into a 10 L reactor Was added at a rate of 5 ml / min and stirred for 2 hours, 500 g of ethylenediamine as an aqueous chelating agent was added at a rate of 5 ml / min and stirred for 2 hours, and polyoxyethylene (6) cetyl / stearyl ether (Polyoxyethylene (6 ) cetyl / stearyl ether) 50 g was added and stirred for 2 hours, and 1.0 kg of the alkoxysilane aqueous solution having the above-described water-repellent functional group was added at a rate of 5 ml / min, followed by mixing for 2 hours.

The following presents a comparative example that can be compared with the embodiments of the present invention to more easily grasp the characteristics of Examples 1 to 3 above.

<Comparative Example 1>

The prepared nano-silica aqueous dispersion was used.

The following test examples show experimental results comparing characteristics of Examples 1 and 3 according to the present invention so that characteristics of Examples 1 to 3 according to the present invention can be more easily grasped.

<Test Example 1>

In order to compare the physical properties of the environmentally friendly penetration-type inorganic waterproofing and anticorrosive composition prepared according to Examples 1 to 3 and the composition prepared in Comparative Example 1, prepared according to Examples 1 to 3 described above Eco-friendly penetration-type inorganic waterproofing and anticorrosive composition and the composition prepared according to Comparative Example 1 were tested for water absorption, water permeability, chloride ion permeation resistance and dissolution resistance by KS F 4930, KS M ISO 2812 The acid resistance test by was carried out, the flash point test was performed by KS M 2010, the freeze peel resistance performance was performed by SS 13 72 44, and the slip resistance performance test was performed by KS F 2375 to check each result. It is shown in Table 1 below.

division Example 1 Example 2 Example 3 Comparative Example 1 Water absorption
Performance Standard state 0.09 0.08 0.07 0.15 After alkali resistance test 0.10 0.09 0.08 0.16 After repeated low and high temperature tests 0.09 0..08 0.07 0.15 After accelerated weathering test 0.09 0.08 0.07 0.15 Water resistance performance 0.09 0.08 0.07 0.16 Chloride ion permeation resistance performance (mm) 0 0 0 0.3 Dissolution resistance performance Smell and taste clear clear clear clear Turbidity (degree) 0.5 or less 0.5 or less 0.5 or less 0.5 or less Chromaticity (degree) 1 or less 1 or less 1 or less 1 or less Heavy metal (as Pb) (mg / L) Non-detection Non-detection Non-detection Non-detection Potassium permanganate consumption (mg / L) 0.9 0.85 0.82 0.98 pH 7.8 7.8 7.8 8.0 Phenol (mg / L) Non-detection Non-detection Non-detection Non-detection Residual evaporation (mg / L) 15 14 14 16 Reduction of residual chlorine (mg / L) 0.1 0.1 0.1 0.2 flash point clear clear clear clear Acid resistance (5%, MgSO ₄ , 72hr) clear clear clear clear Peel resistance (100 cycles, method A) 0.25 0.22 0.20 0.4 Slip resistance
(BPN) Before application 77 77 77 77 After application 70 71 72 63

As shown in Table 1, the eco-friendly penetration-type inorganic waterproofing and anticorrosive composition prepared according to Example 1 to Example 3 had significantly higher performance than the composition prepared according to Comparative Example 1.

As described above, the preferred embodiment of the present invention has been described in detail, but the present invention is not limited to the above embodiment, and can be variously performed by those skilled in the art within the scope of the technical spirit of the present invention. Deformation is possible.

Claims (8)

As an environmentally friendly penetration-type inorganic waterproofing and anticorrosive composition for waterproofing and anticorrosion of concrete structures,
The eco-friendly permeable inorganic waterproofing and anticorrosive composition weight compared to the nano-silica aqueous dispersion 1 to 70% by weight, the inorganic mixture dispersion 1 to 30% by weight, alkali silicate solution 1 to 20% by weight, aqueous chelating agent 1 to 10% by weight, interface 0.1 to 5% by weight of an active agent and 1 to 30% by weight of an alkoxysilane solution having a water-repellent functional group,
The inorganic mixture dispersion is a mixture of inorganic mixture and water mixed in a 3.5: 7 weight ratio and used to fill the voids in the concrete to improve strength and durability, and the inorganic mixture is 100-nm-sized calcium carbonate 65-99 Weight%, containing 0.1 to 20% by weight of sodium hexafluorosilicate and 0.01 to 15% by weight of titanium dioxide
Eco-friendly penetration-type inorganic waterproofing, anticorrosive composition.
According to claim 1,
The nano silica aqueous dispersion is used to improve durability by forming a coating film on a concrete surface, and using alkoxy silane (R ¹ _n Si (OR ² ) _4-n ) on the particle surface of the aqueous silica sol It is produced by causing a hydrolysis reaction to be partially hydrophobized.
In the molecular formula R ¹ _n Si (OR ² ) _4-n of the alkoxy silane R ¹ is an organic group having 1 to 8 carbon atoms, R ² represents an alkyl group having 1 to 5 carbon atoms or an acyl group having 1 to 4 carbon atoms,
The hydrolysis reaction proceeds by adding 5 to 60 parts by weight of the aqueous silica sol, 1 to 50 parts by weight of the alkoxy silane, 30 to 40 parts by weight of the solvent, and 0.1 to 10 parts by weight of the catalyst, and a temperature of 20 to 90 ° C. Eco-friendly penetration-type inorganic waterproof, anticorrosive composition characterized in that it is carried out in.
delete According to claim 1,
The alkali silicate aqueous solution is a mixture of alkali silicate and water in a 1: 7 weight ratio and is used to improve strength and durability by reacting with cement hydrate present in the concrete, and the alkali silicate includes sodium silicate or calcium silicate Eco-friendly penetration-type inorganic waterproof, anticorrosive material composition characterized in that.
According to claim 1,
The aqueous chelating agent is used to improve the stability of the composition by improving the stability of the nano-silica aqueous dispersion and the inorganic mixture dispersion, and is eco-friendly, characterized in that any one selected from EDTA-2Na, EDTA-4Na, and ethylenediamine Penetrating inorganic waterproofing and anticorrosive composition.
According to claim 1,
The surfactant is used to deeply penetrate the interior of the concrete by lowering the surface tension of the eco-friendly penetration-type inorganic waterproofing and anticorrosive composition, and polyoxyethylene (10) cetyl / stearyl ether ), Polyoxyethylene (6) cetyl / stearyl ether, polyoxyethylene (6) cetyl ether, polyoxyethylene (6) cetyl ether, Polyoxyethylene (12) cetyl ether), polyoxyethylene (4) isodecyl ether, polyoxyethylene (12) isodecyl ether (Polyoxyethylene (12) isodecyl ether), polyoxyethylene (6) Polyoxyethylene (6) isolauryl ether, polyoxyethylene (5) isostearyl ether (Polyoxyethylene (5) isostearyl ether), polyoxyethylene (3) oleyl ether (Polyoxyethylene (3) oleyl ether), poly Oxyethylene (11) all Polyether (Polyoxyethylene (11) oleyl ether), polyoxyethylene (5) octyldodecyl ether (Polyoxyethylene (5) octyldodecyl ether) and polyoxyethylene (10) octyldodecyl ether (Polyoxyethylene (10) octyldodecyl ether) Eco-friendly penetration-type inorganic waterproof, anticorrosive composition comprising at least one selected from.
According to claim 1,
The aqueous solution of an alkoxysilane having a water-repellent functional group is a mixture of ethanol, water and an alkoxysilane having a water-repellent functional group in a weight ratio of 3: 3: 1, and is used to prevent moisture penetration from outside by forming a coating film on the concrete surface. The alkoxysilane having the water-repellent functional group is an environmentally friendly penetrating inorganic waterproof / corrosion-resistant composition comprising octyltrimethoxysilane or decyltrimethoxysilane.
A method for waterproofing and anticorrosion of a concrete structure using the eco-friendly permeable inorganic waterproofing and anticorrosive composition according to any one of claims 1, 2, and 4 to 7,
Step of removing the rust or impurities on the surface of the concrete by chipping with a water jet or grinder,
The first step of applying the eco-friendly penetration-type inorganic waterproofing and anticorrosive composition to the chipped surface area is cured, followed by curing by applying a second coating of the inorganic coating composition
Method of waterproofing and anticorrosive construction of concrete structures.