KR100631485B1 - Fast curing coating layer formation method for enhanced durability and preventing neutralization and salt damage of concrete structure and steel structure - Google Patents

Abstract

A rapid-hardened coating method for improving durability of concrete and steel structures and preventing neutralization and salt damage is provided to improve waterproof and sterilizing effects, to increase resistance against salt, to enhance the adhesive force, durability, acid resistance, alkali resistance, bending and abrasion resistance, and to drastically reduce the construction cost and time by simplifying working procedure. A rapid-hardened coating method for improving durability of concrete and steel structures and preventing neutralization and salt damage comprises steps for treating the surface of the concrete structure and the steel structure to remove laitance and foreign matters on the surface; cleaning dust and ashes on the surface of the concrete structure and the steel structure at high pressure; coating the cleaned surface with a putty material; primarily curing the surface of the structure; repeatedly coating the surface with a coat composition containing epoxy resin and acryl resin over twice; and secondarily curing the surface of the structure.

Description

Fast curing coating layer formation method for enhanced durability and preventing neutralization and salt damage of concrete structure and steel structure}

1 is a graph showing the life relationship between the neutralization and reinforced concrete structures.

Figure 2 is a view showing a schematic process diagram for the film forming method of the concrete structure and steel structure according to the present invention.

The present invention relates to a method of forming a hardening film for increasing the durability and neutralization of concrete structures and steel structures and preventing salts, and has excellent waterproofing, rust preventing, and antibacterial effects, strong resistance to salts, strong adhesion, excellent durability, and acid resistance. , Alkali resistance, Flex resistance, Wear resistance, etc., It is easy to work and can greatly reduce the construction cost and air, Significantly improved swelling, peeling and dropping phenomena Increase the durability and neutralization of concrete and steel structures The present invention relates to a fast curing film forming method for preventing salts and salts.

Concrete structures and steel structures are affected by various weather environments such as rain, wind, snow, and sunshine, resulting in repeated contraction and expansion due to various causes such as freezing and thawing, temperature change, drying and repeated penetration of moisture. . Among them, the freezing and thawing phenomenon is repeated every winter, reducing the durability of concrete structures and steel structures over a long period of time. Moreover, concrete installations directly exposed to snow melting and ice melting agents commonly used in winter cause corrosion of reinforcing steel or steel by the penetration and diffusion of chlorides. Corrosion of steel in concrete facilities, which is a combination of freezing, thawing and salting, leads to volumetric expansion, causing cracking and delamination, and, if not properly maintained, can lead to a serious situation that can eventually lead to collapse. Will result. In addition, when concrete structures and steel structures are constructed in seawater, hot springs, sewage treatment plants, industrial sites, etc., wastewater and sulphate soil environments, performance decreases due to chemical erosion by the penetration of harmful ions and chemical reactions. Will occur.

In Korea, research on chemical erosion of concrete and steel structures is not common, and it is mostly limited to laboratory studies, and there are few examples of chemical erosion in field facilities. Therefore, it is necessary to investigate and analyze the cause of performance degradation of concrete facilities subjected to chemical erosion to achieve the durability improvement of the concrete facilities. In addition, recent studies show that deterioration of concrete and steel structures in urban environments is largely dominated by neutralization, which is more serious due to global warming. Therefore, deterioration related to the neutralization of concrete facilities is expected to intensify in the future. For example, many concrete structures and steel structures located in downtown Seoul are suffering from performance degradation due to neutralization.

1 is a graph showing the life relationship between the neutralization and reinforced concrete structures. In FIG. 1, t ₁ is a point in time when the neutralization depth reaches the surface of the reinforcing bar, and until now, the life of the reinforced concrete structure has been determined as the point of time t ₁ . On the other hand, t ₃ is the point at which the member strength reaches its limit, and some view it as the life of the concrete structure, but the point of t ₁ is too stable in the member strength, and t ₃ belongs to an area that is too dangerous. The time t ₂ , which causes corrosion and cracks, is defined as the life of reinforced concrete.

On the other hand, although the deterioration of concrete due to neutralization, chemical erosion, chlorine ion infiltration and freeze-thawing generally occurs in a complex environment, the study is focused on the deterioration of performance under a single condition. In Korea, there have been no studies on the phenomenon of complex deterioration and the life assessment thereof. In the past, various materials and methods related to waterproofing, corrosion prevention, and repair related to concrete structures and steel structures have been introduced. However, in terms of protection, finishing performance, and durability, they have large problems due to peeling, lifting, discoloration, cracking, whitening, etc. It is not getting any effect. The main reason for this phenomenon is that the study focuses on the performance of the material itself rather than the selection of materials and methods that match the environmental conditions of the structure, especially the concrete ground, which requires waterproofing, protection, and repair. This is because, due to the environmental conditions, the compatibility with the concrete base itself was not sufficiently examined.

In general, as a method for protecting a concrete surface, a method of forming a protective film by applying a synthetic synthetic resin coating material such as epoxy, urethane, or acrylic resin to the concrete surface is adopted. Since the reactive synthetic resin is formed of a high-density cured film having excellent chemical resistance and water resistance, it can be expected to have an effect of blocking concrete from a corrosive environment.

However, after applying such a synthetic resin coating material, adhesive damage such as lifting, cracking, peeling, etc. of the coating layer frequently occurs, and it is pointed out as a big problem in durability.As a cause of the adhesion damage of the coating layer, the synthetic resin applied to the concrete surface And stress caused by physicochemical factors in concrete composites, pore structure of concrete, action of alkaline pore solution, and the like. In other words, water vapor pressure, capillary suction force, penetration pressure, etc. generated in the adhesion interface between concrete and the coating are concentrated at the weak part or the defect part of the interface, so that the adhesive damage is caused by relatively small force, and therefore, a coating material having breathability is required. do. In addition to the material properties, the synthetic resin coating material is directly coated with dust, foreign substances, oil, and dirt generated from the form remover used for concrete pouring, the latency generated during concrete curing, and other demolding operations. By applying, the adhesion between the concrete base and the anticorrosive coating material is significantly lowered as a cause of adhesion damage.

The present invention is to solve the problems of the prior art, it is excellent in waterproof, anti-rust, antibacterial effect, strong resistance to salt, strong adhesion, excellent durability, acid resistance, alkali resistance, bending resistance, wear resistance It is easy to work and can greatly reduce the construction cost and air, and the rapid curing film formation method for increasing the durability, neutralization and salt prevention of concrete structures and steel structures that significantly improved the swelling, peeling and dropping phenomenon, and It is an object of the present invention to provide a film-forming composition.

The present invention to achieve the above technical problem,

(a) a surface treatment step for removing the latency and foreign matter on the surface of the concrete structure and the steel structure;

(b) a high pressure washing step to remove dust and dirt from the surfaces of concrete structures and steel structures;

(c) a ground treatment step of applying a putty material on the surface of the concrete structure and the steel structure in which the step (b) is completed;

(d) first curing step;

(e) repeatedly coating the film forming composition comprising a composite resin of an epoxy resin and an acrylic resin on the surface of the concrete structure and the steel structure in which the step (d) is completed; And

(f) secondary curing stage

It provides a fast-curing film forming method for increasing the durability and neutralization of the concrete structure and steel structure, characterized in that it comprises a.

Hereinafter, with reference to the drawings and embodiments will be described in more detail with respect to the present invention.

Usually, to be recognized as suitable as a coating material for concrete structures and steel structures,

Iii) have good adhesion properties in wet environment conditions, ii) have chemical resistance to chemicals, iii) be able to deodorize toxic gases, iii) have breathability to inhibit peeling or swelling of coating materials Iii) have good durability, iii) have antimicrobial properties that can inhibit the growth of microorganisms, iii) be a safe material against environmental hormones, and iii) be sure to It shall satisfy the requirements such as to be harmless and sanitary safe and to be easy to clean during maintenance.

Existing concrete and steel structure coatings have excellent characteristics in paint color, initial adhesion, chemical resistance, etc., but they do not serve as a long-term structure protection means because they peel off in a short period of time, and they have good adhesion to steel structures but short-term adhesion to concrete surfaces. Even if the excellent properties, there is a problem that the long-term adhesion is poor.

 The present inventors have variously analyzed the causes causing problems of existing concrete structures and steel structure paints. Ⅰ) While existing paints are acidic, concretes are strongly alkaline and cannot have affinity in the concrete boundary region. Ii) the difference in shrinkage and expansion rate between paint and concrete structures and steel structures is large, iii) concrete is still functioning at about 15% of moisture, even when fully cured. Desquamation occurs when contacted with more than 8% moisture (That's why traditional technology and paints warn you to stop working at surface moisture content of 8% or higher and humidity of 85% or higher), i) UV and weathering Premature deterioration of the coating film resulting in severe peeling and contamination, and i) This fact has passed, such as bromide (become hard) that is deultteunda by impact because it was discovered that complex acts in accordance with the.

Therefore, the present invention is to solve this problem of the prior art,

(a) a surface treatment step for removing the latency and foreign matter on the surface of the concrete structure and the steel structure; (b) a high pressure washing step to remove dust and dirt from the surfaces of concrete structures and steel structures; (c) a ground treatment step of applying a putty material on the surface of the concrete structure and the steel structure in which the step (b) is completed; (d) first curing step; (e) repeatedly coating a film-forming composition comprising a composite resin of an epoxy resin and an acrylic resin two or more times on the surface of the concrete structure and the steel structure in which the step (d) is completed; And (f) provides a hardening film forming method for increasing the durability of the concrete structure and the steel structure, characterized in that it comprises a secondary curing step and neutralization and salt prevention.

Figure 2 shows a schematic process diagram for the film forming method of the concrete structure and steel structure according to the present invention.

Referring to Figure 2, the method according to the present invention, first performs a surface treatment step for removing the latency and foreign matter on the surface of the concrete structure and steel structure. The surface treatment step is to remove the latency and foreign matter on the surface of the structure, and various surface treatment methods such as conventional sandpaper polishing or grinding may be adopted. After the surface treatment step is completed, a high pressure washing step is performed to remove dust and dirt on the surface of the structure using a high pressure sprayer.

After the high pressure washing, the background treatment or the bleeding is performed by applying the putty material. The application of such putty material is a process for surface treatment of uneven portions of the surface of concrete structures and steel structures before coating, and as the putty material used, the film forming composition according to the present invention may be used.

After performing the background treatment process, the primary curing process is performed. The curing process is intended to minimize harmful effects such as temperature, load, shock, or rupture after the background treatment, and curing conditions are 1 day under a temperature of 15 ° C. to 25 ° C. and a relative humidity of 50% to 70%. It is preferably performed for 2 days.

After the curing step, an exposed rebar and steel antirust coating step, a crack epoxy injection grout step, a repair surface permeable surface strengthening step, and the like may optionally be performed.

After this process, a process of repeatedly coating the film-forming composition comprising a composite resin of an epoxy resin and an acrylic resin on the surfaces of the concrete structure and the steel structure is repeated two or more times. At this time, there may be a rest period of 2 hours to 6 hours between each painting work.

The film formation composition which concerns on this invention contains an aqueous epoxy resin and an aqueous acrylic resin as a main material, and contains a water-dispersible hardening | curing agent, water, and an aqueous epoxy resin as a member.

The film formation composition which concerns on this invention can be manufactured by modifying and mixing the acrylic resin which is excellent in flexibility with the epoxy resin which is excellent in adhesiveness and durability. As a result, it is possible to minimize cracking and peeling phenomenon due to lack of flexibility, which is a problem that can be caused when using epoxy resin alone, and has excellent flexibility, adhesion and durability. That is, in the present invention, by attaching a hydrophilic group to the epoxy terminal to impart hydrophilicity to water, it is possible to secure excellent breathability and water permeability, and consequently to prevent condensation phenomenon to prevent erosion or aging problems caused by water at the interface. It can be solved.

In addition, since the film-forming composition according to the present invention can be applied directly to the structure by mixing the main material and the curing agent without the primer layer at the time of film formation, it is possible to quickly cure, easy to work and significantly reduce the construction cost and air There is an advantage.

The mixing of the epoxy resin and the acrylic resin may be performed while maintaining a stirring speed of 3,000 to 5,000 rpm and a stirring temperature of 50 to 80 ° C. in the presence of an NP series emulsifier having an epoxy molar ratio of 50 or more.

Conventional water-based epoxy paints or adhesives are emulsified by adding a surfactant (emulsifier) to the epoxy resin, and the emulsification state is determined by a method of synthesizing the resin and the surfactant. The stability of the emulsion is determined by the method or the like. In particular, how small the size of the water particles used is dispersed has a decisive effect on the emulsion stability.

The film-forming composition according to the present invention, by dispersing the size of the water particles to 1㎛ or less through the above process conditions, excellent hydrophilicity and excellent stability with water, there is no phenomenon of separation from water, There is no phenomenon of turbidity or increase in viscosity at the time of addition, good curing stability, excellent water resistance even after curing, and no dissolution in water. In addition, since there is no bubble because of excellent fluidity during operation, it is possible to have good gloss, dense density and excellent durability.

In addition, since the epoxy resin included in the film-forming composition according to the present invention exhibits weak alkalinity, it does not neutralize the concrete structure and the steel structure, so that the coating surface is not oxidized and the adhesion is very excellent, thereby minimizing the peeling phenomenon.

Furthermore, the film-forming composition according to the present invention has excellent water resistance compared to other resins, and therefore no whitening phenomenon occurs, and excellent yellowing does not occur even after long-term exposure to ultraviolet rays. In general, the acrylic resin is ductility is gradually reduced to solidify, so there is a phenomenon that it is cracked or peeled off, the film-forming composition according to the present invention is excellent in stability and long-lasting properties because the physical properties are maintained for a long time, the resin is reduced to acrylic acid concrete Very little neutralization with.

In the film formation composition which concerns on this invention, it is preferable that the weight ratio of the epoxy resin to acrylic resin contained in a main material is 4: 1-3: 1.

When the content of the epoxy resin is less than the weight ratio, sufficient durability cannot be secured, and when the content of the epoxy resin exceeds the weight ratio, there is a problem that peeling phenomenon due to shrinkage may be caused. Similarly, when the content of the acrylic resin is less than the weight ratio, there is a problem that cracks may occur due to weak flexibility, and when the weight ratio is exceeded, problems in adhesion may occur or there is a fear of neutralization.

In the film-forming composition according to the present invention, the content of the water-dispersible curing agent, water and the water-based epoxy resin included in the member is 60 to 70% by weight, 20 to 30% by weight of water and water-based epoxy based on the total weight of the member. It is preferable that it is 5-10 weight% of resin.

Meanwhile, the film-forming composition according to the present invention may further include additives added to the main body and the member together with the main body and the member, and such additives include fillers, antibacterial agents, pigments, walnut shell powder, and the like. These are mentioned, In the case of a member, a hardening accelerator and orange flavor oil etc. are mentioned.

Barium fillers, zirconium fillers, illite fillers or mixtures thereof can be used as the filler, and the impact strength and durability can be increased by the addition of such fillers, and in particular, when the illite filler is added, the effect of emitting far infrared rays It can also be used to be useful when painting the internal structure. The content of the filler is preferably 5 to 10% by weight based on the total weight of the base material, if less than 5% by weight has a problem that the amount of far-infrared rays is released, when the content exceeds 10% by weight is durable There is a problem and is undesirable.

Antibacterial agent is to prevent oxidation and aging of concrete structures and steel structures due to the growth of various microorganisms, bacteria and fungi due to moisture inside the interface between concrete structures and steel structures. And many others can be used. The content of the antimicrobial agent is preferably 3 to 5% by weight based on the total weight of the host, but less than 3% by weight is not preferable because there is a problem that the desired antibacterial performance can not be obtained.

The pigment performs a function of preventing yellowing and aging due to ultraviolet rays, and various kinds of inorganic pigments may be used, for example, TiO ₂ based and Cr ₂ O ₃ based pigments. The content of the pigment is preferably 10 to 20% by weight based on the total weight of the base material, if less than 10% by weight is a problem that the color is blurred, when it exceeds 20% by weight is not preferable because of the disadvantages of economic disadvantages not.

Walnut shell powder is intended to increase the impact resistance and hardness of the surface of concrete structures and steel structures, and to form a film with embossing to improve the aesthetics of the surface of concrete structures and steel structures. Can be. The content of the walnut shell powder is preferably 5 to 15% by weight based on the total weight of the main body, when the content is less than 5% by weight, there is a problem in that the moisture control ability is weak. Although good, there is a problem that the durability is lowered, which is not preferable.

As the curing accelerator serves to promote the curing action by the member, those conventionally used in the art may be used, and the content thereof is preferably 5 to 10% by weight based on the total weight of the member. If the content of the curing accelerator is less than 5% by weight based on the total weight of the member, there is a problem that a sufficient curing acceleration effect can not be achieved, and if the content of the curing accelerator exceeds 10% by weight, the residual accelerator is released to reduce durability. Not desirable

Orange fragrance oil performs the function of odor removal and fragrance, the content of which is preferably from 2 to 10% by weight based on the total weight of the member, when less than 2% by weight there is a problem that can not achieve a sufficient aroma effect, If it exceeds 10% by weight, there is a problem that the oil is free and remains on the surface, which is not preferable.

Finally, the secondary curing process is performed after the repeated coating of two or more times of the above-described film-forming composition. Curing conditions of the secondary curing process, it is preferably carried out for 5 to 7 days at a temperature of 15 ℃ to 25 ℃ and relative humidity of 50% to 70%.

Hereinafter, the present invention will be described with reference to the following specific examples, but the present invention is not limited to the following examples.

Example . To increase the durability and neutralize concrete structures and steel structures Fast curing  Film formation method

Sectional restoration mortar construction for underground sewage boxes was carried out, chipping work was performed with a burekka of 3-5 mm depth, and the film-forming composition according to the present invention was 0.2 kg / m ² , cross-section as a reinforcement surface reinforced coating. repair mortar after the first round is applied in an amount of 10 kg / m ² (thickness 5 mm) as ppumchil operation, the cross-sectional repair mortar secondary ppumchil work 10 kg / m ² (thickness 5 mm) as, and at 25 ℃ curing for 7 days.

Performance evaluation

Physical properties

Table 1 below lists the physical properties of the concrete structure and steel structure manufactured by the method according to Examples 1 and 2.

Test Items Test Items and Conditions Test standard Test result Neutralization Promotion Test Compressive strength (MPa) 23.8 KS F 2405-01, KS F 4936-03 clear Neutralization Depth (mm) apply 1 mm or less 0 Unpainted Temperature 40 ℃, relative humidity 40%, C0 ₂ concentration 10%, accelerated test for 21 days 16.2 mm Salt Spray Test Passed 2000 hours salt spray test (durability test) splitting, peeling, rust KS D 9502: 2002 clear Weathering resistance WS type 300 hours-appearance KS M 5000-03 clear Adhesion strength KS F 4715-01 238 (N / ㎠) Water resistance 23 ± 2 ℃, immersion-swelling, cracking 168 hours KS M ISO2812-2-02 clear Whitening resistance Coating amount: 0.15L / ㎡ Quality Assurance Inspection Standard clear Breathable Coating amount: 0.15L / ㎡ Quality Assurance Inspection Standard 62 Impact resistance 300g weight, 30cm, free fall KS D 6711: 1992 clear Wash resistance 1500 KS M 5000-03 clear Acid resistance Sulfuric acid 5%, 168 hours soaking-swelling, cracking KS M ISO 2812-1-02 clear Acid resistance 5% hydrochloric acid, 168 hours soaking-swelling, cracking KS M ISO 2812-1-02 clear Alkali resistance Sodium hydroxide 5%, 168 hours soaking-swelling, cracking KS M ISO 2812-1-02 clear Flame retardant Flame retardant class 1 KS F 2271 clear Flex resistance φ10 mm, 180 ° bend KS M 5000-03 clear Drinking Water Dissolution Test Heavy Metal and Hazardous Substance Dissolution Test Drinking water test standard (water supply standard) clear

Neutralization prevention performance evaluation

The external environmental factors that cause carbonation of concrete are temperature, humidity, and carbon dioxide concentration, and the test errors were minimized as in all accelerated tests to evaluate their effects.

-Conditions for specimen production

10 × 10 × 40 cm square specimens were used as standard, and the number of specimens was 2 or more for the same test. The specimen was manufactured in accordance with KS F2403 (method for making and curing specimens for compressive and flexural strengths in the laboratory), and the compaction of concrete was carried out using concrete compaction rods (16 mm in diameter and 50 cm in length) or internal vibrators (bore). In the case of compaction rods, 26 times per layer and internal vibrator were chopped at a rate of once per 100 cm ² .

After the compacted specimens were placed in a horizontal place until the concrete had cured, the surface was covered with plate glass, steel sheet, and wet cloth to prevent moisture evaporation of the specimens. The demolding period was 24 hours or more and 48 hours after the end of the feeding.

The pre-curing conditions and the accelerated carbonation test conditions were carried out under the pre-curing conditions and environmental conditions as shown in Table 2 with reference to the existing studies, and the test period was performed up to 8 weeks, and the carbonation depth was measured according to the following Table 3 Shown in Carbonation depth was measured by dividing the specimens at the age of lyric, and 1% ethanol solution was used as a reagent. In the measurement method, after removing the debris and powder of the concrete in the measurement surface of the specimen and spraying the reagent, the distance from the surface of the concrete to the red part was measured in mm units. The measurement points were divided into 6 equal parts by avoiding the position of aggregate on one side, and 20 carbonization depths were measured on four sides of two specimens, and the average value was measured.

Specimen type Pre-curing condition Environmental conditions Test time (Note) Curing dry Temperature (℃) Relative Humidity (%) CO ₂ concentration (%) 1,2,3,4,8 Date (Sun) Condition Date (Sun) Condition 10 × 10 × 40 cm (2) + 26 20 ± 3 ℃ underwater 28 20 ± 3 ℃ 60 ± 5% 20 60 5 40 60 5 40 50 10 40 40 10

Environmental conditions Type of specimen 10 × 10 × 40cm Carbonation Depth (mm) Temperature (℃) Relative Humidity (%) CO ₂ concentration (%) 1 week 2 weeks 3 weeks 4 Weeks 8 Weeks 20 60 5 Coating free treatment 3.5 5.3 7.5 8.9 11.5 Comparative example 0.0 0.7 1.4 3.2 5.1 Example 0.0 0.0 0.0 0.0 0.0 40 60 5 Coating free treatment 3.8 4.5 6.8 10.9 14.2 Comparative example 0.0 0.8 2.3 4.6 5.6 Example 0.0 0.0 0.0 0.0 0.0 40 50 10 Coating free treatment 2.3 4.7 7.9 12.6 17.8 Comparative example 0.0 0.9 2.8 5.8 6.1 Example 0.0 0.0 0.0 0.0 0.0 40 40 10 Coating free treatment 4.5 5.9 8.5 15.2 19.7 Comparative example 0.0 2.3 3.4 6.1 8.4 Example 0.0 0.0 0.0 0.0 0.0

(Comparative example: Applying C products of H company in Korea)

Salt prevention performance evaluation

In order to confirm the anti-salting performance of the method according to the present invention, the mortar product (product A and product B) commercially available in the market was compared and tested.

First, in order to evaluate the penetration resistance to chlorine ions, three pieces of mortar, which are 28 days old, were cut to a thickness of 5 cm, and then commercially available products A and B and three specimens of mortar to which the method according to the present invention was applied. , And each of the specimens was configured with a diffusion cell, and the amount of passing charge obtained by integrating the current measured every 30 minutes under the same conditions for 6 hours by applying a 60 V DC power supply over time is shown in Table 4 below.

Type of mortar Passing charge (coulomb) Product A 3,600 Product B 2,350 Applying the process according to the invention -

Referring to Table 4, it can be seen that in the specimen to which the method according to the present invention is applied, the amount of charge passed is not measured, and thus, the film formed by the method according to the present invention has perfect penetration resistance to chlorine ions. Can be.

In addition, in Table 5 below, two types of existing new technology methods and the process order and the required period of the method according to the present invention are shown as a chart.

Times New technology (H company) (ECS method) New technology (S company) (Metal mixture paint) The present invention Remarks Model name (material used) Solvent (dilution rate) Time Model name (material used) Solvent (dilution rate) Time Model name (material used) Solvent (dilution rate) Time Same condition One Surface Treatment (Grinder) 2 Surface Treatment (Grinder) 2 Surface Treatment (Grinder) 2 Same condition 2 Remove foreign substance (water wash)  One Remove foreign substance (water wash) One Remove foreign substance (water wash) One Same condition 3 dry 4 dry 4 dry One 4 1st coating (CONCOAT EW) Dedicated thinner (50 ~ 70%) One Coruseal-Putty One Gap site putty One Same condition 5 dry 4 dry 4 dry 2 6 Air gap upper putty (CONCOAT shock caulking) One Primary coating (Coruseal-PM) Dedicated thinner PM-SN (25 ~ 30%) One Primary painting Tap water (10-15%) One Same condition 7 dry 4 dry 4 dry 40 minutes 8 Second coating (CONCOAT EW or USB) Dedicated thinner (10 ~ 20%) One 2nd coating (Coruseal) Dedicated thinner SN (20 ~ 25%) One 2nd painting Tap water (10-15%) One Same condition 9 dry 7 dry 4 dry 40 minutes 10 3rd coating (CONCOAT USB) Dedicated thinner (0 ~ 5%) One 3rd coating (Coruseal) Dedicated thinner SN (20 ~ 25%) One 11 dry 7 dry 4 12 Coating thickness (100㎛) Coating thickness (100㎛) Coating thickness (150㎛) 13 Last time required 33 hours 27 hours 10 hours 10 minutes

(The above conditions are according to the specifications provided by the company)

As can be seen from the results of Table 5, the present invention and the existing new technology method shows a difference in the time required and the film thickness for each process, it can be seen that the final time required for the present invention significantly reduced compared to the existing new technology method have. In addition, although the existing new technology uses a thinner as a solvent, it can be seen that the present invention is more workable and environmentally friendly because water is used.

In addition, Table 6 below shows the results of comparing the objective field applicability of the two existing new technology method and the method according to the present invention as a chart.

division New technology (S company) New technology (H company) The present invention equipment Electric mixer required to stir the adhesive and metal mixture Electric mixer required to stir the adhesive and metal mixture No equipment needed Background level Possible to install wet surface (less than 8%) Possible to install wet surface (less than 8%) Can be applied to wet surfaces (30%) Type of object Concrete, steel classification application Application of concrete and steel Same application to concrete and steel Process Material Properties Meteor → Meteor → Meteor Meteor → Meteor → Meteor Mercury → Aqueous Hazardous Volatile Chemicals Occur Occur Not Occurred Use of primer use use unused safety Safety precautions and fire risks during work (Difficult to use disaster prevention facilities such as tunnels) Safety precautions and fire risks during work (Difficult to use disaster prevention facilities such as tunnels) Good (available for disaster prevention facilities such as tunnels) Constructability Tier 3 Tier 3 Tier 2

As can be seen from the results of Table 6, the present invention exhibits excellent field applicability compared to existing new technology methods.

According to the present invention, it is excellent in waterproofing and rust-preventing effect, has strong resistance to salt, prevents the attachment of various microorganisms inhabiting the inner wall, and also increases the durability and neutralization of concrete structures and steel structures, which also have antibacterial effect, and prevents salt damage. It can provide a fast curing film forming method for. In addition, the fabricated structure possesses strong adhesion, excellent durability, acid resistance, alkali resistance, bending resistance, and abrasion resistance, and can be applied directly to the structure by mixing a main material and a curing agent without a primer layer when forming a film and quick curing property. Since the workability is simple, construction cost and air can be greatly reduced. In addition, by having excellent breathability of the structure having the ability to adjust the moisture in the structure according to the environment, swelling, peeling and dropping phenomenon is significantly improved.

Claims (9)

(a) a surface treatment step for removing the latency and foreign matter on the surface of the concrete structure and the steel structure; (b) a high pressure washing step to remove dust and dirt from the surfaces of concrete structures and steel structures; (c) a ground treatment step of applying the putty material on the surface of the concrete structure and the steel structure in which the step (b) is completed, wherein the putty material is i) based on the total weight of the main material, barium filler, zirconium filler, 5 to 10% by weight of an illite filler or a mixture thereof and ii) an aqueous epoxy resin and an aqueous acrylic resin in a weight ratio of epoxy resin: acrylic resin, in a ratio of 4: 1 to 3: 1, and containing water as a member. Characterized by comprising an acidic curing agent, water and an aqueous epoxy resin. (d) first curing step; (e) coating the film-forming composition comprising a composite resin of an epoxy resin and an acrylic resin two or more times on the surface of the concrete structure and the steel structure in which the step (d) is completed, wherein the film composition is i) 5-10 wt% of a filler consisting of a barium filler, a zirconium filler, an illite filler, or a mixture thereof, based on the total weight of the host, and ii) a water-based epoxy resin and an aqueous acrylic resin by weight ratio of epoxy resin: acrylic resin, 4 It includes in a ratio of 1: 1 to 3: 1, and comprises a water dispersible curing agent, water and an aqueous epoxy resin as a member, the mixture of the epoxy resin and acrylic resin is 3,000 in the presence of an NP series emulsifier having an epoxy molar ratio of 50 or more, Maintaining a stirring speed of 5,000 to 5,000 rpm and a stirring temperature of 50 to 80 ℃ characterized in that it is carried out while maintaining the size of the water particles below 1 ㎛ Step; And (f) secondary curing stage Fast curing film forming method for increasing the durability and neutralization of the concrete structure and steel structure, including the prevention of salt. The method of claim 1, wherein the primary curing is to increase the durability of the concrete structure and steel structure, characterized in that performed for 1 to 2 days, at a temperature of 15 ℃ to 25 ℃ and 50% to 70% relative humidity And fast curing film forming method for neutralization and salt prevention. delete delete delete According to claim 1, wherein the content of the water-dispersible curing agent, water and the water-based epoxy resin contained in the member is 60 to 70% by weight, 20 to 30% by weight of water and water-based epoxy resin 5 to based on the total weight of the member Fast curing film forming method for increasing the durability and neutralization of the concrete structure and steel structure, characterized in that 10% by weight. According to claim 1, wherein the subject is based on the total weight of the subject, 3 to 5% by weight antimicrobial agent; 10 to 20% by weight of TiO ₂ or Cr ₂ O ₃ based inorganic pigments; And at least one additive selected from the group consisting of 5 to 15% by weight of walnut shell powder. 10. A fast curing film forming method for increasing durability and neutralizing and preventing salt of concrete structures and steel structures. The method of claim 1, wherein the member, based on the total weight of the member, 5 to 10% by weight of the curing accelerator; And at least one additive selected from the group consisting of 2 to 10% by weight of orange fragrance oils. A method of forming a hardening film for increasing durability and neutralizing and preventing salt of concrete structures and steel structures. The method of claim 1, wherein the secondary curing, the durability of the concrete structure and steel structure, characterized in that performed for 5 to 7 days at a temperature of 15 ℃ to 25 ℃ and 50% to 70% relative humidity And fast curing film forming method for neutralization and salt prevention.

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