KR101339576B1 - a process for preventing a concrete carbonation anddeterioration - Google Patents

Abstract

Concrete neutralization prevention and cross-sectional recovery reinforcement waterproofing method, and a concrete structure produced by the method. Concrete neutralization prevention and cross-sectional recovery reinforcement waterproofing method of the present invention, the concrete surface pretreatment step of pre-treating the concrete surface of the corrosion or cracks generated in order to maintain the corrosion or cracks generated in the concrete; And a neutralization prevention step of preventing neutralization of the pretreated concrete surface.

Description

{A process for preventing a concrete carbonation and deterioration}

The present invention relates to a concrete neutralization prevention and cross-sectional recovery reinforcement waterproofing method, and more specifically, to protect the building concrete structure, bridges, tunnels, covering structures, water and sewage structures, red brick building structures and other civil engineering, building concrete structures The present invention relates to a new concrete neutralization prevention and cross-sectional recovery reinforcement waterproofing method which satisfies the penetration type waterproofing method, the coating type waterproofing method, and the surface neutralization preventing method simultaneously.

In general, concrete structures, as carbon dioxide and moisture react as the seal passes, cause carbonation, sea wind, seawater, and calcium chloride bases for snow removal to penetrate the concrete. Shortened life due to chloride intrusion, high alkali cement and alkali-silica reaction which reacts and expands in the presence of moisture and causes concrete to crack. do.

In particular, due to the rapid increase in traffic, the neutralization rate of concrete is rapidly increasing due to the generation of carbon dioxide in the exhaust gas emitted from automobiles.If the concrete is neutralized, the passivation film protecting the reinforcing steel is destroyed and the steel is corroded. When the steel is corroded, cracking and peeling of concrete occurs due to expansion of the steel volume, and in severe cases, the structure collapses.

Therefore, it is necessary to suppress the corrosion of reinforcing steel in the concrete, and a method of preventing the deterioration of concrete by the aluminum oxide film that prevents the degradation of the concrete by forming the aluminum oxide film on the concrete surface to prevent the corrosion of the steel inside the patent is disclosed. No. 1999-14610 and Patent Publication No. 2000-6872.

The Patent Publication No. 1999-12610 discloses an aluminum oxide film by adhering an aluminum flake or powder, a one-component polyurethane resin or a two-component epoxy resin or a solvent having a bonding strength of 40 kg / cm 2 or more, and a solvent to form a liquid. How to form. In addition, the Patent Publication No. 2000-6872 discloses a mixture of aluminum flakes or powders, one-component polyurethane resins or two-component epoxy resins and xylenes having an adhesive strength of 40 kg / cm 2 or more, and making them in a liquid state and then adhering them to concrete surfaces. It is a method of forming an aluminum oxide film.

However, the conventional anti-degradation method disclosed in the Patent Publication Nos. 1999-12610 and 2000-6872 is because the organic polyurethane resin or epoxy resin is adhered to and adhered to the concrete surface formed of inorganic cement to prevent peeling of the coating layer. There is a problem that the coating layer is eliminated in the long term, and in particular, the freeze-melt is weak, so that the physical properties of the initial change due to climate change during the winter season and summer season does not properly perform the deterioration prevention function.

In addition, the coating layer constructed by the conventional deterioration prevention method has a problem that the appearance of the concrete structure is not beautiful because a yellowing phenomenon of the polyurethane resin and epoxy resin fading after a long time.

In order to solve this problem, the coating material is not separated from the concrete matrix by maintaining a strong adhesion to the concrete matrix, the chemical resistance, impact resistance and abrasion resistance, freeze soluble resistance is significantly improved, the neutralization and deterioration prevention method of concrete to prevent yellowing phenomenon This is disclosed in Korean Patent Publication No. 10-0475366.

The neutralization and deterioration prevention method of concrete disclosed in Patent Publication No. 10-0475366 includes a mixture of epoxy resins, modified epoxy resins, alumina or aluminum hydroxide, crude cement, solvents and other components. 55 parts by weight of a polyamide resin, a modified amine resin, a modified aromatic amine resin, titanium dioxide, and a coating material comprising 45 to 55 parts by weight of a mixed hardener including aluminum silicate, water and other components were mixed on the concrete surface. After application, mixed 59.9 to 73.3 parts by weight of a mixed main material including an acrylic resin or a modified acrylic resin, titanium dioxide, a polyester resin or a modified polyester resin, a solvent and other components, a urethane resin or a modified urethane resin, and a solvent Applying a top coat material by mixing 30 ~ 36.63 parts by weight of the mixed curing agent, including the top surface of the .

However, this also does not deviate from the function of the simple coating coating, such a coating waterproofing method has the advantage of shortening the air due to the simple construction method, while the insulation is inferior, condensation and impact resistance due to fine cracks It was causing various other problems.

That is, the waterproofing materials used in the waterproofing method of the coating film form a thin film structure to block the cracked portion of the structure from the outside, so that the small scale cracked portion extending into the structure maintains the cracked state.

In this case, since the temperature difference exists inside and outside the structure coated with the waterproof material, condensation occurs when water droplets form on the inner surface of the waterproof material due to the temperature difference between the outside cold air and the warm air inside the structure. Caused.

As a result, the condensation drops into the cracks of the structure, resulting in a weakening of the rigidity of the structure. Also, the water droplets enter the reinforcing bars of the concrete structure and cause corrosion. It was to act as a factor to shorten the life of the.

In addition, after coating the cracked portion of the structure with a waterproof material as described above, a new concrete is placed on it, but this leads to an increase in the load on the structure, weakening the rigidity of the structure and collapse in severe cases It was to act as the main cause.

The present invention is to provide a concrete neutralization prevention and cross-sectional recovery reinforcement waterproofing method that can be repaired while preventing the neutralization of the portion where the corrosion or cracks are generated in the concrete to prevent the corrosion and cracks to occur later to improve durability. There is this.

Another object of the present invention, by using a lightweight aggregate to minimize the volume and weight of the concrete without affecting the stability of the structure, but to significantly improve the chemical resistance, impact resistance and abrasion resistance, freeze soluble resistance of the concrete to prevent yellowing phenomenon It is to provide a neutralization and anti-degradation process.

An object of the present invention, the concrete surface pretreatment step of pre-treating the concrete surface of the corrosion or cracking portion in order to maintain the corrosion or cracking portion in the concrete; And a neutralization prevention step of neutralizing the pretreated concrete surface.

According to one aspect of the invention, the neutralization prevention step, the resin coating layer coating step of stabilizing by applying a resin coating layer on the concrete surface in consideration of the surface roughness of the concrete surface; And a resin mortar coating treatment step of coating the resin mortar on the resin coating layer.

According to another aspect of the invention, the waterproofing agent composition may be further used when performing the anti-neutralization step.

According to another aspect of the present invention, the waterproofing agent composition is 65-70 parts by weight of epoxy resin having an epoxy equivalent of 184-94 and a viscosity of 11,000-14,000 centipoise, 0.2-1.0 part by weight of methyl cellulose, and emulsifier 2-5. Low viscosity polyamide 25 having an epoxy resin composition (A) having a viscosity of 2,500-4,500, an acid value of 2-4, and an active hydrogen equivalent of 90-110 by weight, by weight of an antifoaming agent, 0.5-2 parts by weight, and 22.2-32.3 parts by weight of water. -33 parts by weight, antifoaming agent 0.2-1.0 parts by weight, emulsifier 0.5-1.5 parts by weight, water 62.5-74.3 parts by weight of polyamide (B).

According to another aspect of the invention, the concrete surface pretreatment step, the drilling step of drilling a portion of the corrosion or cracks generated on the concrete surface; A pipe insertion step of inserting a pipe into the portion drilled in the drilling step; Grouting material injection step of injecting the grouting material through the pipe; And a pipe cutting step of cutting the surface exposed portion of the pipe after curing of the grouting material.

According to another aspect of the invention, the concrete surface pretreatment step, the drilling step of drilling a portion of the corrosion or cracks generated on the concrete surface; Grouting material injection step of injecting the grouting material into the perforated portion; A surface treatment step of removing the latency and foreign matter of the concrete surface into which the grouting material is injected; A high pressure washing step to remove dust and dirt from the concrete surface; A background treatment step of applying a putty material to the concrete surface from which the dust and dust are removed; A primer layer forming step of forming a primer layer including a ceramic resin on the concrete surface to which the putty material is applied; Forming a primary elastic film on the primer layer by coating a composition for forming a primary elastic film including an organic-inorganic composite resin and a phase change functional material; Forming a secondary elastic film by coating a composition for forming a secondary elastic film including an organic-inorganic composite resin, a phase-transfer functional material, and a purifying functional composite on an upper portion of the primary elastic film; Primary curing step of curing by leaving a certain time; A deterioration preventing film coating step of coating a deterioration preventing film including an organic-inorganic composite resin, a full-wave region-type radiation material, and a far-infrared wavelength region-type radiation material on the concrete surface on which primary curing is completed; And it may include a secondary curing step of curing by leaving a certain time.

According to the present invention, it can be repaired while preventing the neutralization of the portion where the corrosion or cracks are generated in the concrete has the effect of improving the durability by preventing the occurrence of corrosion and cracks later.

1 is a flowchart of the concrete neutralization prevention and cross-sectional recovery reinforcement waterproofing method according to an embodiment of the present invention.
Figure 2 is a flowchart of the concrete neutralization prevention and cross-sectional recovery reinforcement waterproofing method according to another embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings will be described a preferred embodiment of the present invention.

1 is a flowchart of the concrete neutralization prevention and repair method according to an embodiment of the present invention.

Referring to this figure, the concrete neutralization prevention and repair method according to an embodiment of the present invention, the concrete for pre-processing the concrete surface of the portion where the corrosion or cracking occurred in order to maintain the portion where the corrosion or cracking occurs in the concrete It may include a surface pretreatment step (S100), and a neutralization prevention step (S200) to prevent the neutralization of the pretreated concrete surface.

Concrete surface pretreatment step (S100) is a step that is performed to maintain the portion where the corrosion or cracking occurs in the concrete. This can be done in the context of maintaining the facility, and can only be performed locally where corrosion or cracking has occurred.

Various methods may be considered when performing the concrete surface pretreatment step (S100). In this embodiment, a grouting method is used. Of course, since the scope of the present invention is not limited thereto, other public methods may be applied.

For reference, the grouting method is called grouting by injecting fillers into cracks and cavities in the ground for leakage prevention work or soil stability in civil engineering.

The injection material is also called grout or grout material. Filling material is filled by gravity or pump, or repairing cracks of building, reinforcement of foundation part, support of mechanical pedestal. The type of grout depends on the purpose of construction.

Concrete surface pre-treatment step (S100), the drilling step (S101) for drilling a portion in which corrosion or cracking occurred on the concrete surface, and a pipe insertion step (S102) for inserting a pipe (pipe) in the perforated portion in the drilling step; It may include a grouting material injection step (S103) for injecting the grouting material through the pipe, and a pipe cutting step (S104) for cutting the surface exposed portion of the pipe after curing of the grouting material.

For the concrete surface pretreatment step (S100), for example, a hole of 1 to 2 diameters of 7 to 10 mm per 1 m 2 is drilled to a depth of 30 to 70 mm for the concrete structure to be waterproofed by cracking or the like.

Then, the pipe is inserted therein, the hose is tightly connected to the pipe, and the grouting material (including the waterproofing material) is injected through the hose at low pressure.

Then, the left grouting material is cured, and then the protruding pipe is cut. At this time, the injection pressure of the grouting material may be 5 ~ 20 kg / ㎠.

On the other hand, the neutralization prevention step (S200) is a step that is performed by preventing the neutralization of the pre-treated concrete surface.

In the present embodiment, the anti-neutralization step (S200), in consideration of the surface roughness of the concrete surface by applying a resin coating layer on the concrete surface to stabilize the coating step (S201), and coating the resin mortar to the top of the resin coating layer Resin mortar coating may include a step (S202).

As described above, after stabilizing by coating the resin coating layer on the concrete surface of the concrete surface pretreatment step S100, the resin mortar is coated on the resin coating layer to prevent neutralization of the concrete surface.

When the anti-neutralization step (S200) proceeds, for example, a waterproofing agent composition may be further used.

For reference, when concrete is coated with a certain thickness to waterproof the structure, the increased load may threaten the safety of the structure. Therefore, a lightweight and waterproof material needs to be used.

The waterproofing agent composition which can be used in this embodiment includes 65-70 parts by weight of epoxy resin having an epoxy equivalent of 184-94 and a viscosity of 11,000-14,000 centipoise, 0.2-1.0 parts by weight of methyl cellulose, 2-5 parts by weight of an emulsifier, Epoxy resin composition (A) composed of 0.5-2 parts by weight of an antifoaming agent and 22.2-32.3 parts by weight of water, and a viscosity of 2,500-4,500, acid value of 2-4, 25-33 weight of low viscosity polyamide with an active hydrogen equivalent weight of 90-110 Parts, 0.2-1.0 parts by weight of antifoaming agent, 0.5-1.5 parts by weight of emulsifier, and 62.5-74.3 parts by weight of water.

This is explained further. Methylcellulose obtained by reacting cellulose, acetone, and a basic compound with a polymer liquid resin having an epoxy equivalent of 184-194 and a viscosity of 11,000-14,000 centipoise was added in an amount of about 0.2-1.0% by weight to the resin, and this mixed solution To the epoxy resin was added about 2% by weight of water and stirred sufficiently. In this mixture, emulsifiers soluble in cold water and organic solvents, such as lanolin, rosin, cholesterine, lecithin, fatty acid esters of polyhydric alcohols, copolymers of alkylphenols and ethylene oxide or propylene oxide, and the like, are used in the above-mentioned epoxy resin. Add 5% by weight and stir at 800-1,200 RPM while slowly adding water to emulsify uniformly. A small amount of silicon oil is added to remove bubbles generated at this time. (The mixed solution obtained in this way is hereinafter referred to as A.)

The homogeneous mixture (A) is excellent in water resistance, chemical resistance, acid resistance, durability, etc., and shows an excellent effect as a waterproofing agent. The epoxy resin used above is different from the conventional commercial epoxy resin, and epoxy equivalent 184-194 and viscosity 11,000-14,000 are preferred as the waterproofing agent raw material of the present invention. Apart from the above uniform epoxy compound (A), polyamide HO (CORCONH-CH2CH2NH) n H obtained by polycondensation with dicarboxylic acid, diamines and the like is blended into the mixture (A) to improve curability. Such polyamide may be commercially available, but should be a low viscosity polyamide having a viscosity of 2,500-4,500 centipoise, an acidity of 2-4, and an active hydrogen equivalent weight of 90-110. The epoxy equivalent in the epoxy resin composition (A) was added at an active hydrogen equivalent ratio of the polyamide, and then stirred until it became uniform at a speed of 300-400 RPM while adding the emulsifier described above. In order to remove the bubbles generated at this time is carried out while adding a small amount of a defoaming agent such as silicon oil. In order to simplify the actual construction, the polyamide composition is prepared and stored and transported separately from the epoxy resin composition (A), and then the composition (A) and the polyamide composition (hereinafter referred to as composition B) are used in combination at a ratio of 1: 1. Can be. In the preparation of the polyamide composition (B), 0.5-1.5 parts by weight of the emulsifier described above is added to 30 parts by weight of the polyamide, and 0.3-0.8 parts by weight of water and an antifoaming agent are added and stirred until uniform. When commercially available polyamide is used instead of the low viscosity polyamide used above, the waterproofing agent desired in the present invention cannot be obtained. Only when the polyamide having the above-mentioned drying is used as a curing agent, the pot life is appropriate, curing of the waterproofing agent can be easily achieved at room temperature, irritant, non-toxic and excellent adhesion, and compatible with plasticizers, diluents, solvents Excellent in sex

These waterproofing agents can be mixed with inorganic fillers, mixed with a small amount of cement and applied to the waterproofing surface to reinforce the surface of the building and close the pores of the concrete to maximize the waterproofing effect.

That is, the waterproofing agent used in the present invention is a low-viscosity liquid that can be easily dispersed in water, and is easily mixed with cement, and can be completely infiltrated into the porous surface that is easily penetrated by moisture such as cement or mortar, thereby exhibiting a perfect waterproof effect. have.

By carrying out the neutralization prevention work on the surface of the pretreated concrete using the waterproofing agent composition having such physical properties and characteristics, it can be repaired while preventing the neutralization of the portion where the corrosion or cracks are generated in the concrete, thereby preventing the corrosion and the cracking afterwards as much as possible. Durability can be improved.

2 is a flowchart of the concrete neutralization prevention and cross-sectional recovery reinforcement waterproofing method according to another embodiment of the present invention.

On the other hand, as described above, the concrete surface pretreatment step (S300) is a step that is performed to maintain the portion where the corrosion or cracking occurs in the concrete, unlike the above-described embodiment may be applied to the method of FIG. .

That is, in the present embodiment, the concrete surface pretreatment step (S300), the drilling step (S301) for drilling a portion in which corrosion or cracking is generated, the grouting material injection step (S302), the grouting material is injected to grouting the perforated portion Surface treatment step (S303) to remove the latent and foreign matter on the injected concrete surface, high pressure cleaning step (S304) to remove dust and dirt on the concrete surface, apply the putty material to the concrete surface from which dust and dust The base treatment step (S305), the primer layer forming step of forming a primer layer containing a ceramic resin on the concrete surface to which the putty material is applied (S306), on the top of the primer layer, comprising an organic-inorganic composite resin and a phase change functional material Forming a primary elastic film by coating a composition for forming a primary elastic film (S307), an organic-inorganic composite resin on the upper part of the primary elastic film, Secondary elastic film forming step (S308) to form a secondary elastic film by coating a composition for forming a secondary elastic film containing a phase-transfer functional material and a purifying functional composite (S309), the primary curing step to cure by leaving a predetermined time (S309) ), The anti-deterioration film coating step (S310) of coating a deterioration prevention film containing an organic-inorganic composite resin, a radio wave field-type radiation material and a far-infrared wavelength range-type radiation material on the surface of the concrete, the primary curing is left, and a predetermined time By curing may include a secondary curing step (S311), through these steps it is possible to pre-treat the portion of the corrosion or cracks generated in the concrete.

Although optional, when performing the above steps, in particular, the primer layer forming step (S306), the primary elastic film forming step (S307), the secondary elastic film forming step (S308) and the anti-deterioration film coating step (S310) When at least one of the steps is performed, the above-described waterproofing agent composition may be further used.

According to the present invention having such a method, it is possible to repair while preventing the neutralization of the portion in which the corrosion or cracks are generated in the concrete, thereby further improving the durability by preventing corrosion and cracks as much as possible later.

In particular, after the stabilization of the surface of the concrete from the simple coating after the surface treatment, that is, by coating the surface treatment, that is to prevent the occurrence of corrosion and cracks as possible to provide a highly durable concrete structure.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Accordingly, such modifications or variations are intended to fall within the scope of the appended claims.

S100, S300; Concrete Surface Pretreatment Step
S200: Neutralization Prevention Step

Claims (7)

A concrete surface pretreatment step of pretreating the concrete surface of the corrosion or cracking portion to maintain the corrosion or cracking portion of the concrete; And a neutralization prevention step of preventing neutralization of the pretreated concrete surface,
The concrete surface pretreatment step,
A perforating step of perforating a portion where corrosion or cracking occurs on the concrete surface;
Grouting material injection step of injecting the grouting material into the perforated portion;
A surface treatment step of removing the latency and foreign matter of the concrete surface into which the grouting material is injected;
A high pressure washing step to remove dust and dirt from the concrete surface;
A background treatment step of applying a putty material to the concrete surface from which the dust and dust are removed;
A primer layer forming step of forming a primer layer including a ceramic resin on the concrete surface to which the putty material is applied;
Forming a primary elastic film on the primer layer by coating a composition for forming a primary elastic film including an organic-inorganic composite resin and a phase change functional material;
Forming a secondary elastic film by coating a composition for forming a secondary elastic film including an organic-inorganic composite resin, a phase-transfer functional material, and a purifying functional composite on an upper portion of the primary elastic film;
Primary curing step of curing by leaving a certain time;
A deterioration preventing film coating step of coating a deterioration preventing film including an organic-inorganic composite resin, a full-wave region-type radiation material, and a far-infrared wavelength region-type radiation material on the concrete surface on which primary curing is completed; And
Concrete neutralization prevention and cross-sectional recovery reinforcement waterproofing method, characterized in that for performing a secondary curing step of curing by leaving a certain time. The method of claim 1,
The neutralization prevention step,
Resin coating layer coating step of stabilizing by applying a resin coating layer on the concrete surface in consideration of the surface roughness of the concrete surface; And
Concrete neutralization prevention and cross-sectional recovery reinforcement waterproofing method comprising a resin mortar coating step of coating the resin mortar to the upper portion of the resin coating layer. 3. The method according to claim 1 or 2,
Concrete neutralization prevention and cross-sectional recovery reinforcement waterproofing method characterized in that the waterproofing agent composition is further used when performing the neutralization prevention step. The method of claim 3,
The waterproofing agent composition is 65-70 parts by weight of an epoxy resin having an epoxy equivalent of 184-94 and a viscosity of 11,000-14,000 centipoise, 0.2-1.0 parts by weight of methyl cellulose, 2-5 parts by weight of an emulsifier, and 0.5-2 parts by weight of an antifoaming agent. Epoxy resin composition (A) composed of 22.2-32.3 parts by weight of water, viscosity 2,500-4,500, acid value 2-4, 25-33 parts by weight of low viscosity polyamide with active hydrogen equivalent weight 90-110, defoamer 0.2-1.0 Concrete neutralization prevention and cross-sectional recovery reinforcement waterproofing method comprising polyamide (B) composed of parts by weight, 0.5-1.5 parts by weight of emulsifier, and 62.5-74.3 parts by weight of water. delete delete delete

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