KR101749226B1 - Repairing or reinforcing method of seismic retrofit concrete structures - Google Patents

Abstract

(A) a surface treatment step of surface-treating a concrete surface; (b) a rust-rust-rust-preventive treatment step of removing the rust of the reinforcing bar exposed to the outside of the concrete and applying a rust-removing type rust inhibitor; (c) an anti-rust inhibiting treatment step in which a coating type rust inhibitor is mixed with a cement powder and applied to a reinforcing bar exposed to the outside of the concrete; (d) an alkaline recovery rust-preventive treatment step of applying a penetrating rust-preventive agent to the surface of the concrete to restore the alkaline resistance; (e) installing a tubular reinforcing bar on the concrete surface; (f) an adhesion strengthening treatment step of applying a subject to the concrete surface; (g) an inorganic-based polymer mortar composition mixed with water and a curing agent to effect construction; And (h) a surface finishing step of applying a surface treatment material to the concrete surface.

Description

REPAIRING OR REINFORCING METHOD OF SEISMIC RETROFIT CONCRETE STRUCTURES [0002]

The present invention relates to a method for repairing and reinforcing a section of a constructed concrete structure.

More particularly, the present invention relates to an eco-friendly seismic reinforced concrete structure which is excellent in durability and workability, satisfying the high strength compressive strength and adhesion strength of a concrete structure by applying an inorganic polymer mortar composition to a part requiring repair and reinforcement in the base concrete structure And a method of repairing and reinforcing the same.

Generally, the surface of the concrete structure is mostly exposed to the outside, and the stiffness of the structure is deteriorated due to deterioration of aesthetics over time and cracks on the surface.

In addition, when cracks are generated, water is more likely to be infiltrated, causing additional cracks to occur more easily, and the strength of the reinforcement roughened inside the concrete structure due to the infiltrated moisture is further lowered.

Therefore, when the concrete structure is aged, it is required to perform maintenance and reinforcement in order to prevent problems such as above-mentioned aesthetics and strength decrease.

The problems of conventional concrete structures are corrosion and breakage due to composite deterioration, that is, deterioration of composite deterioration, that is, deterioration such as salt corrosion, neutralization, alkali aggregate reaction, chemical corrosion, Chemical degradation and physical degradation.

Causes of chemical deterioration include deterioration due to alkali aggregate reaction, deterioration due to sulfate and acid, and deterioration due to corrosion of steel bar. Physical deterioration is caused by deterioration due to freezing and thawing, cracking due to shrinkage and load, and the like.

When such deterioration occurs, if the damage is severe, a part of the concrete structure is removed, and the reinforcing bars laid out in the inside are exposed to the outside or the reinforcing bars are corroded inside, resulting in a decrease in durability and load bearing capacity, .

To solve these problems, a repair method is applied to extend the service life of the concrete by applying an organic mortar to a stretchable surface requiring repair or reinforcement.

The repair method using the organic mortar is advantageous in that the curing time is fast, the adhesive strength is excellent, and the compressive strength, flexural strength and tensile strength are excellent.

However, since it is difficult to use on the wet surface, it can not be applied to the stretched surface in which moisture is permeated, and the elastic modulus and the thermal expansion coefficient of the concrete are different from each other, thereby interfering with water repellency.

In addition, massive casting may affect the matrix, and massive casting due to breakdown of the matrix is not possible. Problems such as workability due to short pot life, generation of harmful gas to the human body, and discoloration due to ultraviolet rays may occur.

In order to solve the above problems, a mixed mortar mixed with an organic mortar and an inorganic mortar has been used in recent years. However, the problem of the organic mortar is reduced and the problem still remains. Therefore, There is a problem that it is not suitable for reinforcement.

Accordingly, there is a need for a technique capable of repairing and reinforcing the expansion and contraction of a concrete structure using an inorganic mortar so as to solve the problem that may be caused by using a mixed mortar of organic mortar or organic mortar and inorganic mortar.

Published Japanese Patent Application No. 10-2005-0034978 (Apr. 15, 2005)

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a method for manufacturing a concrete structure, which comprises applying an inorganic polymer mortar composition to a part requiring repair and reinforcement in an existing concrete structure, Reinforced concrete structure which is excellent in durability and workability, and which is capable of satisfying adhesion strength.

In order to solve the above problems, the method of repairing and reinforcing an eco-friendly seismic strengthening concrete structure according to the present invention comprises the steps of: (a) performing a surface treatment of a concrete surface; (b) a rust-rust-rust-preventive treatment step of removing the rust of the reinforcing bar exposed to the outside of the concrete and applying a rust-removing type rust inhibitor; (c) an anti-rust inhibiting treatment step in which a coating type rust inhibitor is mixed with a cement powder and applied to a reinforcing bar exposed to the outside of the concrete; (d) an alkaline recovery rust-preventive treatment step of applying a penetrating rust-preventive agent to the surface of the concrete to restore the alkaline resistance; (e) installing a tubular reinforcing bar on the concrete surface; (f) an adhesion strengthening treatment step of applying a subject to the concrete surface; (g) an inorganic-based polymer mortar composition mixed with water and a curing agent to effect construction; And (h) a surface finishing step of applying a surface treatment material to the surface of the concrete. The present invention provides a method for repairing and reinforcing an eco-friendly seismic strengthening concrete structure.

The present invention satisfies high strength compressive strength and adhesion strength of a concrete structure by applying an inorganic polymer mortar composition to a part requiring repair and reinforcement in a base concrete structure, and has a remarkable effect that is excellent in durability and workability.

1 is a flowchart illustrating a method of repairing and reinforcing an eco-friendly seismic strengthening concrete structure according to the present invention.
FIG. 2 is a flowchart illustrating a construction surface processing step in a repair and reinforcement method of an eco-friendly seismic strengthening concrete structure according to the present invention.
FIG. 3 is a perspective view showing an example in which a branch type reinforcing bar is installed in a repair and reinforcement method of an eco-friendly seismic-proof reinforced concrete structure according to the present invention.
4 is a view showing an example in which an elastic stiffener is installed in a repair and reinforcement method of an eco-friendly seismically strengthened concrete structure according to the present invention.
5 is a flowchart illustrating a step of recovering a section in the repair and reinforcement method of an eco-friendly seismic strengthening concrete structure according to the present invention.
6 is a cross-sectional view illustrating an example of restoration of the eco-friendly seismic strengthening concrete structure according to the present invention by the repairing step in the repairing and repairing method.
FIG. 7 is a view showing an example in which a retractable formwork is installed in a repair and reinforcement method of an eco-friendly seismic-proof reinforced concrete structure according to the present invention.
8 is an exploded perspective view showing a retractable formwork in a repair and reinforcement method of an eco-friendly seismic strengthening concrete structure according to the present invention.
FIG. 9 is a sectional view of a wood for explaining an expansion and contraction plate in the repair and reinforcement method of an environmental friendly anti-seismic reinforced concrete structure according to the present invention.
10 is a view showing an example in which the expansion and contraction plate of the expansion and contraction form is deformed in the repair and reinforcement method of the eco-friendly seismically strengthened concrete structure according to the present invention.

Advantages and features of embodiments of the present invention and methods of achieving them will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. To fully disclose the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. The terms and words used in the present specification and claims should not be construed to be limited to ordinary or dictionary meanings defined in consideration of functions in the embodiments of the present invention, It should be construed in the meaning and concept consistent with the technical idea of the present invention based on the principle that the concept of the term can be appropriately defined in order to explain it in the best way.

Therefore, the embodiments described in the present specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and do not represent all the technical ideas of the present invention. Therefore, various equivalents And variations are possible.

Before describing the present invention with reference to the accompanying drawings, it is not shown what is not necessary in order to reveal the gist of the present invention, that is, a publicly known structure that a person skilled in the art can easily add, .

The method of repairing and reinforcing eco-friendly seismic-strengthened concrete structures according to the present invention is a method of repairing and reinforcing eco-friendly seismic-strengthened concrete structures according to the present invention by installing branch reinforcing bars in parts requiring repair and reinforcement in the existing concrete structures, Reinforced concrete structure which is excellent in strength and durability and workability.

Hereinafter, a method for repairing and reinforcing an eco-friendly seismically strengthened concrete structure according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a flowchart illustrating a method of repairing and reinforcing an eco-friendly seismic strengthening concrete structure according to the present invention.

The method of the present invention for repairing and reinforcing eco-friendly seismic strengthening concrete structures comprises the steps of (a) a surface treatment step of surface-treating a concrete surface, (b) a step of removing the rust of the reinforced concrete exposed to the outside of the concrete, (C) an anti-rust inhibiting treatment step in which a coating type rust inhibitor is mixed with a cement powder to a reinforcing bar exposed to the outside of the concrete, (d) a step of applying a penetrating rust inhibitor to the surface of the concrete to recover (G) an inorganic polymeric mortar composition is mixed with water and a curing agent to form an adhesive layer on the surface of the concrete; (e) (H) a surface finishing step of applying a surface treatment material to the concrete surface.

(a) Construction surface treatment step for surface treatment of concrete surface

The surface treatment step of treating the surface of the concrete is a method of repairing and repairing the surface of the concrete structure to eliminate problems such as cracks, peeling, and dropouts on the surface of the concrete structure. (A1) a surface treatment step of removing the dirt and the latence by piercing the steel bar so as to expose the steel bar using a hand tool or a power tool, (a2) an exponential reapplication step of applying a primer cement to harden a portion of the concrete which requires a leaking portion and a rupture index treatment, and (a3) washing and catching the high pressure water washing and catching using a high pressure sprayer on the concrete surface .

At this time, in order to surface the concrete surface, it is preferable to proceed with the phenolphthalene solution after confirming the degree of neutralization.

(a1) a surface treatment step of removing the dirt and laitance by using a hand tool or a power tool to break the steel bar so as to expose the steel bar;

The concrete surface is chipped using a hand tool or a hand tool such as a grinder, a breaker, a hammer, or the like.

At this time, it is preferable that the chipped portions are removed with sufficient space inside the concrete structure in addition to the portions where the cracks, peeling, and dropouts of the concrete surface have occurred.

Therefore, it is possible to repair and reinforce the weakened portion of the concrete structure, thereby ensuring improved durability and the like.

Therefore, chipping is performed to the inside and the periphery of the portion where the problem occurs.

Further, the reinforcing bars are completely exposed in the process of chipping, and other materials such as dirt, laitance, and the like are removed, so that a rustproofing agent and a composition for maintenance and repair described later can be easily attached to the concrete surface.

(a2) an exponential reapplication step of applying the primer cement so as to cure the portion of the concrete which requires leaking portion and rupture index treatment

If there is a leakage part in the concrete surface treated through the surface treatment step, an exponent is applied to the leakage part or the filling is performed by indexing.

At this time, the exponent material used may be a promo cement, and the index material is applied to the leakage area using a trowel or the like or is filled.

Forming cement is a natural cement with high water resistance, high initial strength, no shrinkage, fine particle, seawater reclamation and refractory properties and high powder. Also, it is suitable for corrosive environment such as sewage and wastewater treatment plant where water is handled, house, dairy factory, sewage tunnel, etc. since there is no separation and whitening of lime during hydration process.

(a3) Washing and catching the high-pressure water washing and catching using a high-pressure sprayer on the concrete surface

In the step (a1), the concrete surface is cleaned and the washing wastewater is captured. In the case (a1), the step (a3) is immediately performed when there is no water leakage on the concrete surface. ) Step is carried out after completion of the curing of the tofu cement applied or filled in the step (a2).

At this time, the washing is performed by using a high-pressure sprayer to spray water at a high pressure, thereby washing the foreign matter on the concrete surface.

Preferably, it is washed with a water pressure of 200 to 300 bar to improve the adhesion strength.

Thereafter, the following step is carried out when the surface of the concrete washed with high pressure is dry.

(b) Rust removal of rust-free rust-free rust-free rust-free rust-free rust-preventive treatment

When the step (a) is completed, a rust-removing type rust inhibitor is applied to the reinforcing bars exposed to the outside of the concrete.

The rust removal type rust inhibitor may be a rust removal type rust inhibitor having a specific gravity of 1.18 to 1.28 and a drying time of 1 to 2 hours (15 to 30 ° C) To neutralize the rust to remove rust and to prevent corrosion of reinforcing bars due to acid resistance.

In this case, even after the washing of the concrete surface and the catching of the concrete surface are completed in the step (a), the foreign matter of the oil in the reinforcing bar may remain fine. Accordingly, in step (b), the foreign matter of the oil impregnated in the reinforcing bar may be wiped off using cloth or the like, and the rust removal type rust inhibitor may be applied.

(c) Bleaching inhibiting rust-inhibiting treatment step in which a coating type rust inhibitor is mixed with cement powder and applied to reinforcing bars exposed to the outside of concrete

Coating type antirusting agent is applied to reinforcing bars exposed to the outside of concrete.

The coating type rust inhibitor may be a coating type rust inhibitor having a specific gravity of 0.08 to 1.08, which is mainly composed of an antioxidant, and inhibits recurrence of rust due to excellent antifouling inhibiting function and prevents corrosion of reinforcing bars.

Therefore, by forming a film on the surface of the reinforcing bars, the oxidation reaction of the reinforcing bars can be prevented.

At this time, the coating type rust inhibitor is mixed with cement powder and applied. Thus, the coating type rust preventive made of water can be mixed with the cement powder, thereby improving the viscosity and enhancing the adhesion.

Although steps (b) and (c) are sequentially described according to the design conditions, the step (c) is performed first and the step (b) is performed next, or the step The rust removal type rust preventing agent and the coating type rust preventing agent applied on the surface of the concrete in the step (c) are simultaneously applied, or the rust removing agent is coated with only one selected rust-preventive agent and the coating type rustproofing agent Lt; / RTI >

(d) Alkali recovery rust-preventive treatment step in which the surface of concrete is coated with penetrating rust inhibitor to recover the alkali

Applying penetrating rustproofing agent to the concrete surface to restore the alkalinity of the concrete structure.

The penetration type rust inhibitor may be a penetration type rust inhibitor having a physical property of an inorganic type ionic substance (lithium nitrite, silane compound type), PH 12.5 to 13.5 and a specific gravity of 1 to 1.1 after permeation, Alkalinity is reduced to the inside of neutralized concrete structure to regenerate aged concrete.

Thus, the chemical resistance is ensured, and corrosion resistance and weather resistance of the reinforcing bars are improved.

(e) Step of installing branch type reinforcing bars on the concrete surface

The step of installing the branching type reinforcing bars on the concrete surface can improve the adhesion to the inorganic mortar composition applied in step (g) and improve the performance against earthquake by installing the concrete on the damaged part of the concrete structure.

On the other hand, when the damaged portion of the pre-formed concrete is large in the portion for repairing and reinforcing the concrete structure, it is difficult to expect the strength only by the application of the inorganic polymer mortar composition.

Accordingly, the repair and reinforcement method of the environment friendly anti-seismic reinforced concrete structure according to the present invention can improve the strength by inserting the branch type reinforcing bars 10 by drilling the part to be repaired and reinforced.

This will be described in detail with reference to FIG.

FIG. 3 is a perspective view showing an example in which a branch type reinforcing bar is installed in a repair and reinforcement method of an eco-friendly seismic-proof reinforced concrete structure according to the present invention.

Referring to FIG. 3, a space in which the reinforcing bars 10 are inserted into the concrete surface to be reinforced and reinforced is punctured, and the reinforcing bars 10 are inserted into the perforated space.

As shown in FIG. 3, the inserted branch reinforcing bars 10 are formed in the shape of a straight line and have a plurality of outwardly extending branches. The contact area with the inorganic polymer mortar composition The strength and the durability can be improved.

In addition, since the inorganic polymer mortar composition is cured and hardened, the shape of the composition is uniformly cured and prevented from being disturbed, thereby providing an aesthetic effect by being integrated with the base concrete structure even after recovery.

Also, the installed branch reinforcing bars (10) are inserted into the surface of the concrete structure to improve the seismic performance by increasing the supporting force and horizontal resistance.

Here, the installation process of the branch-type reinforcing bars 10 will be described in more detail. The concrete of the branch-type reinforcing bars 10 is pierced by a drill or the like, and is cleaned using an air brush or iron brush .

Thereafter, by injecting chemical anchor or the like into the perforated space and inserting the branched reinforcing bars 10, it is possible to firmly connect the reinforcing bars 10 to the base concrete structure.

Accordingly, a part of the branch-type reinforcing bar 10 is inserted into the base concrete structure, and the remaining part is located inside the inorganic polymer mortar composition to be constructed in step (g) to be described later, Thereby enhancing the joining strength between the compositions and enhancing the durability so that the physical properties of the concrete structure can be sufficiently exhibited.

Depending on the design conditions, additional elastic stiffeners 20 may be installed in addition to the branch-type reinforcing bars 10 for reinforcing the earthquake-proof performance.

As shown in FIG. 4, the elastic stiffener 20 is disposed inside the inorganic polymer mortar composition or in the outer peripheral surface of the inorganic polymer mortar composition to be formed in step (g) And can be installed using a binding member such as a clip.

At this time, the elastic stiffener 20 may be formed by processing a unsaturated polyester resin into a plate shape, and may have any structure that can improve seismic performance.

Further, when the elastic stiffener 20 is installed, the raw ore may be powdered on the surface thereof, sprayed at a predetermined pressure, and impregnated and cured.

The elastic stiffener 20 is located inside the inorganic polymer mortar composition. As shown in FIG. 4, the inorganic stiffener 20 is formed of an inorganic polymer mortar composition applied to cover the elastic stiffener 20 in step (g) (20) can be improved.

Here, the raw ore is a sericite series, which emits far-infrared rays and rapidly provides thermal conductivity to perform hydrolysis of toxic substances such as formaldehyde formed by hydration of the inorganic polymer mortar composition.

(f) Adhesive reinforcement treatment step to apply the subject to the concrete surface

The adhesion enhancing treatment step of applying the subject to the concrete surface is brought into contact with a mixture of the inorganic mortar composition, water and the curing agent, which is applied in the step (g) to be described later, by applying the subject to the surface of the surface of the concrete.

In this case, the adhesion of the inorganic mortar composition applied to the surface of the base concrete for repair and reinforcement is improved by the reaction of the base and the hardener, so that the phenomenon that the base mortar composition is removed even after the construction can be prevented.

According to the design conditions, the motif may be applied on the outer circumferential surface of the branch-type reinforcing bars 10 installed in the step (e).

As a result, a mixture of the inorganic polymer mortar composition and the water and the curing agent, which is applied in step (g) described below, is applied to the branch type reinforcing bar 10 projected outwardly from the base concrete structure, 10, it is possible to increase the adhesion between the branched reinforcing bars 10 and the inorganic polymer mortar composition by reacting the curing agent with the subject applied on the outer peripheral surface of the reinforcing bars 10, Durability can be improved.

The subject to be used in the step (f) comprises 5 to 30% by weight of fine silica, 5 to 30% by weight of calcium carbonate, 4 to 30% by weight of color pigment, 1 to 30% by weight of extender pigment, 0.1 to 2% 0.1 to 3 wt% of an accelerator, 0.1 to 2 wt% of an anti-settling agent, 0.1 to 0.5 wt% of a dispersant, and 20 to 45 wt% of an adhesion promoter.

The fine silica improves the durability of the subject and increases the strength. When less than 5% by weight of the fine silica is mixed, the strength is lowered, and when it exceeds 30% by weight, the improvement effect is insufficient.

Calcium carbonate improves flowability and whiteness as a subject.

The colored pigment is used for imparting the color of the composition, and it can keep the same color as the surface of the base concrete, thereby blocking the heterogeneous color expression of the base concrete and the part to be repaired and reinforced to prevent the aesthetic effect from being hindered can do.

When an amount of less than 1% by weight is mixed, the viscosity of the extender pigment is lowered and the adhesive strength with the surface to be applied is lowered. When the amount of the extender pigment exceeds 30% by weight, gloss This is a problem of deteriorating the aesthetic effect.

The barrier agent performs the function of blocking ultraviolet rays, and may be coated or coated after the coating is applied to the subject, and may be included in the subject.

The accelerating agent may be added in order to accelerate the mixing of the base material. The accelerator may be an iron salt mixed with N, N-dimethylaniline, tetrahydroquinoline, triethylamine and benzoin, and preferably N, N-dimethyl Aniline.

If less than 0.1% by weight of such an accelerator is mixed, curing failure may be caused. If the accelerator is more than 3% by weight, yellowing of the coating film may occur.

The anti-settling agent is used for increasing the viscosity and imparting rigidity, and various anti-settling agents can be used, but they are selected from the group consisting of ethylhydroxyethylcellulose, hydroxymethylcellulose, carboxymethylcellulose, organic bentonite and silica compounds It is preferable to use either one or a mixture of two or more thereof.

When the amount of the anti-settling agent is less than 0.1% by weight, a precipitate is formed to cause layer separation. When the amount of the anti-settling agent is more than 2% by weight, the viscosity is excessively increased and the flowability is deteriorated.

An unsaturated polycarboxylic acid-based dispersant can be used. When less than 0.1% by weight is mixed, the material separation phenomenon tends to occur, whereas when 0.5 If it exceeds the weight%, the strength and durability may be lowered.

The adhesion promoter may comprise from 20 to 45% by weight based on the total composition of the subject.

Specifically, it is preferable to use a polyurethane resin comprising 5 to 25% by weight of an acrylate or methacrylate polymer, 0.5 to 5% by weight of a silane coupling agent, 5 to 30% by weight of a urethane acrylate, 20 to 65% by weight of a polyol and 20 to 30% by weight of a diisocyanate .

The acrylate or methacrylate polymer has a range of 5 to 25% by weight, and when it has the above-mentioned range, it improves the viscosity of the subject to prevent deterioration in workability.

Depending on the design conditions, 5 to 15 parts by weight of butyl acrylate may be mixed with 100 parts by weight of the acrylate or methacrylate polymer.

Such butyl acrylate imparts the flexibility of the coating film and functions to prevent shrinkage of the coating film generated when the base and the curing agent described below are combined with each other. When the amount of the butyl acrylate is less than 5 parts by weight based on 100 parts by weight of the acrylate or methacrylate polymer Cracks may be induced by shrinkage of the coating film, which may deteriorate the adhesion performance. If the amount exceeds 15 parts by weight based on 100 parts by weight of the acrylate or methacrylate polymer, the curing property of the coating film may be impaired and yellowing of the coating film may be caused by ultraviolet rays have.

The silane coupling agent may be composed of aminosilane, more preferably 3-aminopropyl-triethoxysilane, which is bonded through a condensation reaction between a silica-based filler and a polymer.

Herein, aminosilane has an oil-in-oil vessel which is bonded to an organic material in the same molecule and a hydrolyzable group which reacts with a wet raw material, and serves to bond the two. Thus, a coating material (rust preventive agent) Thereby improving adhesion and durability between the mortar compositions.

Urethane acrylate is a component having high frictional resistance, rigidity and flexibility, which not only improves the cohesion and adhesion properties of the subject but also softens the molecular structure and can be used in the range of 5 to 30% by weight.

The polyol affects the fluidity and workability before curing and affects the physical and chemical performance after curing. The polyol may be used in the range of 20 to 65 wt%, and when it exceeds 65 wt%, the blend may be blistered blistering phenomenon and stain may occur.

The diisocyanate may be an aromatic, aliphatic or alicyclic diisocyanate, preferably an aliphatic isocyanate, and may be used in an amount of 20 to 30% by weight.

Of these aliphatic isocyanates, isophorone diisocyanate with a low occurrence of yellowing and low control of exothermic reaction can be used.

Depending on the design conditions, the subject may further comprise 1 to 10% by weight of the additive.

Such additives include at least one selected from antifoaming agents, flame retardants, dispersants, plasticizers, antioxidants and surfactants.

Antifoaming agent is used to improve the strength and durability of repairing and reinforcing concrete structures by removing pores in the main body. It is widely used as an antifoaming agent such as alcohol type defoaming agent, silicone type defoaming agent, fatty acid defoaming agent, oil type defoaming agent, ester type defoaming agent or oxyalkylene type defoaming agent Can be used.

The silicone-based antifoaming agent may be dimethyl silicone oil, polyorganosiloxane, fluorosilicone oil, etc. The fatty acid-based antifoaming agents may be stearic acid, oleic acid, etc., The oil defoaming agent may be kerosene, animal or vegetable oil, castor oil, etc. The ester defoaming agent may be solitol trioleate, glycerol monoricinolate, etc. The oxyalkylene defoaming agent may be polyoxyalkylene , Acetylene ethers, polyoxyalkylene diisocyanate esters, polyoxyalkylene alkylamines, and the like.

The flame retardant may be a mixture containing aluminum hydroxide and antimony trioxide. The flame retardant acts on the areas where the base contacts with the reinforcing bars exposed on the surface of the base concrete to prevent oxidation and corrosion, Can be improved.

The dispersant is intended to improve workability by improving the dispersibility of a subject, and may be composed of a polycarboxylic acid type, a naphthalene type, a melamine type, or the like. Preferably, a polycarboxylic acid-based dispersant may be used.

The plasticizer is intended to improve the rheological properties and is excellent in compatibility with the polymer among the adhesion promoters contained in the subject, so that the adhesion enhancement can be more effectively given. At this time, if the amount of the plasticizer used increases, the mechanical strength of the subject may be weakened, and when the plasticizer is contained in a small amount, the viscosity is high and the smoothness is lowered during the operation.

Therefore, it is preferable to mix with an acrylate or methacrylate polymer which adjusts the viscosity in an appropriate ratio.

Antioxidants are used to prevent oxidation of the concrete surface, and amine, bisphenol, monophenol and sulfur antioxidants can be used.

The subject having such a constitution is brought into contact with a mixture of an inorganic polymer mortar composition, water and a curing agent, which will be formed in step (f) to be described later, and an inorganic polymer mortar The adhesion performance with the composition can be improved.

(g) a cross-sectional recovery step in which the inorganic polymer mortar composition is mixed with water and a curing agent

When the subject is applied to the damaged portion in the step (f), the inorganic polymer mortar composition is mixed with water and a curing agent and is applied.

At this time, when the reinforcing bars are exposed to the outside of the surface of the base concrete structure, the reinforcing bars and the reinforcing bars are connected to each other by a binding member such as a wire, so that the base concrete structure and the inorganic polymer mortar composition applied can be more firmly bonded to each other.

For example, when there are three exposed reinforcing bars on the cross section to be restored, each of the reinforcing bars and reinforcing bars may be connected by a binding member such as a wire or the like so that a plurality of rows are formed in the longitudinal direction of the reinforcing bar. That is, by connecting a plurality of reinforcing bars with binding members so as to form an irregular arrangement, the contact area and viscosity between the reinforcing bar and the inorganic polymer mortar composition are increased, and the adhesion can be improved.

Accordingly, a plurality of binding members are interwoven between the reinforcing bars and the reinforcing bars and are irregularly formed, so that the inorganic polymer mortar composition to be applied can be more firmly coupled by the binding members together with the reinforcing bars.

According to the design conditions, when the reinforcing bars exposed at the cross-section to be restored are connected by a binding member such as a wire, the existing reinforcing bars and the reinforcing bars 10 installed in the step (e) Of course.

Thus, by connecting the existing reinforcing bars and the branched reinforcing bars 10 to each other with a binding member, the base concrete structure and the inorganic polymer mortar composition can be more firmly bonded to each other.

The inorganic mortar composition used in the step (g) is a mortar for restoring a surface to be applied for repairing and reinforcing the surface of concrete. The mortar contains 25.5 to 43.5% by weight of a binder, 36.35 to 45% by weight of silicon oxide, 0.05 to 0.1% 0.5 to 1% by weight of polymer resin, 1.3 to 2% by weight of silica fume, 5.9 to 29% by weight of potassium hydroxide, 0.1 to 3.5% by weight of defoamer, 0.1 to 3.5% by weight of fiber reinforcement, 5 to 10% by weight of silica airgel, And 3 to 3% by weight of water, wherein 15 to 20 parts by weight of water and 5 to 10 parts by weight of a curing agent are mixed with respect to 100 parts by weight of the mixed inorganic polymer mortar composition.

At this time, if the mixing ratio of water is less than 15 parts by weight based on 100 parts by weight of the inorganic polymer mortar composition, if the mixing ratio of water is more than 20 parts by weight based on 100 parts by weight of the inorganic polymer mortar composition, And the repair and reinforcement of the concrete structure is not properly performed.

If the mixing ratio of the curing agent to 100 parts by weight of the inorganic polymer mortar composition is less than 5 parts by weight, the reaction force with the surface applied to the surface to be repaired in the step (f) decreases, If the amount is more than 10 parts by weight, the curability of the composition is deteriorated due to the use of an unnecessary curing agent, so that it is difficult to expect durability and the cost is increased.

5 and 6, the mortar composition to be applied can be applied in two steps, first and second steps.

First, (g1) 15 to 20 parts by weight of water is mixed with 100 parts by weight of the mixed inorganic polymer mortar composition, then the mixture is mixed with the curing agent at a ratio of 1: 1, and the mixture is firstly applied to the composition, (G2) 15 to 20 parts by weight of water are mixed with 100 parts by weight of the inorganic polymer mortar composition on the surface of the inorganic polymer mortar composition, and then the mixture is applied to the surface of step (g1) Repair and reinforcement are carried out through a step of repairing the defective area.

That is, as shown in FIG. 6, by sequentially applying the inorganic polymer mortar composition using different mixtures, the curing agent is mixed only with the mortar composition to be formed in the step (g1) Thereby minimizing the use of unnecessary curing agent in the mortar composition to be applied in step (g2), thereby minimizing the cost of construction.

In the step (g1) and the step (g2), 5 to 10 parts by weight of the curing agent is mixed with 100 parts by weight of the inorganic polymer mortar composition in step (g) Wherein the amount of the inorganic polymer mortar composition and water mixed in the step (g1) is 1: 1 by mixing the mixture of the inorganic mortar composition and water and the curing agent to 100 parts by weight of the total inorganic polymer mortar composition 5 to 10 parts by weight, and the remaining inorganic mortar composition is mixed with water in step (g2) and applied,

Among the inorganic polymer mortar compositions to be constructed in the step (f), the binder is a mixture of blast furnace slag cement and gypsum, and blast furnace slag cement: gypsum can be mixed at a weight ratio of 6: 1.

At this time, the blast furnace slag cement occupies a larger proportion than the gypsum in order to form the basic specification of the product as cement. If the ratio is too large, the effect of the gypsum becomes insufficient. Conversely, if the ratio is too small, The bonding strength may be lowered.

Blast furnace slag cement is a by-product obtained in the production of iron and steel. It tends to hydrate and cure, and is used not only as a main material for cement but also to prevent heat island phenomenon and excellent thermal effect. Generally, slag from blast furnace, It is also environmentally friendly.

Such blast furnace slag cement is an eco-friendly byproduct and can be recycled, thereby promoting circulation of recyclable resources and saving energy.

Further, blast furnace slag cement improves the stability and long-term strength of the product.

The gypsum contributes to the improvement of the initial strength of the concrete, and may consist of at least one selected from desulfurization gypsum, chemical gypsum and natural gypsum.

Such gypsum is advantageous in that it is eco-friendly by eliminating sulfur components by using desulfurized gypsum instead of anhydrous gypsum which is conventionally used, and that the desulfurized gypsum is easy to recycle as a by-product generated in the desulfurization process.

The silicon oxide may have a particle size of from 4 to 6, preferably 5.

When the particle size is larger than that of No. 4, the fluidity may be lowered, and when the particle size is smaller than 6, the workability may be deteriorated.

Such silicon oxide is mainly found in sand or quartz, and is used as a main component of concrete structures.

The dispersant prevents the material separation phenomenon of the composition and increases the fluidity for improving workability.

At this time, an unsaturated polycarboxylic acid-based dispersant can be used as a dispersant. When less than 0.05% by weight of the dispersant is mixed, material separation phenomenon tends to occur. When the content exceeds 0.1% by weight, strength and durability may be lowered.

The polymer resin improves elasticity, adhesion strength, bending strength, tensile strength and durability, flexural toughness, waterproofing and surface hardness, and silica fume has high powderity, thereby minimizing the amount of voids in the material mixing process and improving strength and durability.

Potassium hydroxide is sometimes referred to as caustic potassium, which is produced by a casting process in which potassium carbonate is reacted with lime oil or by electrolysis of an aqueous solution of potassium chloride, and is generally used as a concrete admixture.

The antifoaming agent has a function of removing the pores of the composition to enhance strength and durability, and has an advantage of improving workability and pot life.

Such a defoaming agent may be a silicone defoaming agent. If less than 0.1% by weight of the defoaming agent is mixed, the effect of improving the strength and durability is insufficient. On the other hand, if the defoaming agent is used in an amount of more than 3.5% by weight,

The fiber reinforcing material functions to reduce the voids as much as possible and to strengthen the bonding and adhesion between the materials when mixing the inorganic polymer mortar composition. The fiber reinforcing material is used for reinforcing the nylon fiber, ) And a polypropylene fiber, or a mixture thereof, each of which has a fineness of 2 denier and a length of 1 to 7 mm.

Such a fiber reinforcing material can be used to prevent breakage of a part to be reinforced by the composition by using the excellent tensile strength, to secure elasticity, and to suppress cracking and the like due to external force.

When the fiber reinforcing material is mixed in less than 0.1% by weight, reinforcement strength can not be expected. On the other hand, when the fiber reinforcing material exceeds 3.5% by weight, the strength and adhesion of the portion reinforced by the unbalance with other materials are deteriorated.

At this time, the fiber reinforcing material may be treated with 4 to 6% by weight of polymethylhydrogen siloxane based on the fiber reinforcing material.

Preferably, it can be treated at 5% by weight, based on the fiber reinforcement.

Polymethylhydrogensiloxane can be combined with a fiber reinforcing material to form a high-density film on the surface thereof, thereby improving the corrosion resistance, abrasion resistance, antifouling property, sealing effect, chemical resistance, oxidation resistance, physical barrier effect, heat resistance, Low shrinkage, ultraviolet shielding effect, smoothing effect, durability, antistatic property and scratch resistance.

Thus, a polymethylhydrogensiloxane is applied to the coating surface of a fiber reinforcing material composed of any one selected from coconut fiber, nylon fiber, glass fiber, sisal fiber, PVA fiber and polypropylene fiber or a mixture thereof Thereby reacting violently with moisture in the air to form a film on the restored section together with the fiber reinforcement.

Silica airgel is a nonflammable, stable inorganic material made by removing moisture from silica gel, very light and excellent in heat shielding effect.

When such a silica airgel is mixed in an amount less than 5% by weight, effects such as heat insulation, crack prevention, shrinkage expansion prevention, and dew condensation prevention can not be obtained. If the silica airgel is mixed in an amount exceeding 10% by weight, the effect such as heat insulation is improved. However, Adherence and durability are deteriorated and peeling may occur.

Meta kaolin is made by calcining kaolin at a high temperature and is made into fine powder. It is used for high strength of the maintenance reinforcing layer. When less than 2% by weight of it is mixed, strength reinforcement is weak. When it is mixed more than 3% Lt; RTI ID = 0.0 > damage.

When the mixing ratio is less than the lower limit of the mixing ratio, the bonding force is weakened. When the mixing ratio is more than the upper limit value, the unnecessary material waste So that desired properties can not be obtained.

The curing agent to be mixed with the inorganic polymer mortar composition composed of such a binder, silicon oxide, dispersant, polymer resin, silica fume, potassium hydroxide, defoamer, fiber reinforcement, silica airgel and metakaolin may be composed of a peroxide curing agent.

(h) Surface finishing step of applying the surface treatment material to the concrete surface

In the step (g), when the inorganic polymer mortar composition and the mixture of water and the curing agent are completed, surface treatment for insulation is performed on the completed surface.

At this time, a surface treatment material for surface treatment is applied to the surface and closed.

The surface treatment material may be a mixture of 20 to 40% by weight of ceramics, 40 to 60% by weight of a resin emulsion, and 15 to 25% by weight of a silica airgel. The resin may be an acrylic emulsion Lt; / RTI >

Ceramics have excellent heat insulation properties and are used to increase the heat insulation effect of concrete structures through a coating layer by a surface treatment material. When less than 20% by weight is mixed, the heat insulating effect is weak. There is a problem in that the adhesive strength is decreased.

It is preferable to use a powder of such a ceramic, and a particle size of 50 to 300 meshes may be used in consideration of mixing ratios with other materials, workability, and the like.

The acrylic emulsion is used for various physical properties such as compressive strength, adhesion strength, water resistance and alkali resistance. When less than 40% by weight is mixed, the compressive strength of the coating layer is weak and when the amount exceeds 60% by weight, There is a problem that the adiabatic effect is deteriorated due to the reduction of other materials.

The silica airgel has been specifically described in the above-described inorganic polymer mortar composition. If it is mixed in an amount of less than 15% by weight, the effect of heat insulation, prevention of cracking, prevention of expansion and contraction and prevention of condensation can not be obtained. But the adhesion and durability of the material deteriorate due to the unbalance between the materials, and peeling may occur.

The mixing ratio of the silica airgel of the inorganic polymer mortar composition used in the step (g) to the silica airgel of the surface treatment material used in the step (h) is different from that of the inorganic polymer mortar composition used in the step (g) And the surface treatment material used in step (h) is formed on the outer surface of the concrete structure after the inorganic polymer mortar composition is bonded to the surface of the concrete structure.

That is, the silica airgel used in the step (g) is located inside the concrete structure, and the silica airgel used in the step (h) is formed on the outer wall of the concrete structure. The silica airgel used in the step (h) And the durability is easily deteriorated because it is more affected by heat.

Therefore, the silica airgel used in the step (g) may have a sufficient durability and a heat insulating effect even when mixed with 5 to 10 wt%, while the silica airgel used in the step (h) may be mixed with 15 to 25 wt% Are mixed at a higher ratio than the silica airgel to be mixed in the step (g).

Such a surface treating agent may be used by mixing 5 to 15 parts by weight of water and may be coated to have a thickness of about 400 mu m on the surface to be coated.

The surface treatment agent applied to the present invention may be prepared by mixing, for example, 25% by weight of ceramic, 50% by weight of resin emulsion and 20% by weight of silica airgel, and adding 10 parts by weight of water thereto.

A pair of test specimens (1 m (width) * 1 m (length) * 10 cm (thickness)) were prepared in order to examine the effect of the mixed surface treatment materials at these ratios. The surface treatment material is applied and coated, and the other test piece is not treated separately.

The test specimens coated with the surface treatment material were found to have no temperature change. However, the test specimens coated with the surface treatment material were found to have no temperature change, but the other specimen Confirmed that the temperature was changed by an external heat source. After the pair of test specimens were allowed to stand for 30 days, it was confirmed that there was no crack in the specimen to which the surface treatment material was applied and in the other specimen, It was confirmed that cracks occurred.

As another example of the surface treatment material, 25 to 45% by weight of silicate, 50 to 70% by weight of a mineral powder emitting far infrared rays, and 2 to 5% by weight of a curing agent may be mixed.

The silicate (silicate) is used as a desiccant and has an excellent water removing effect. When less than 25% by weight is mixed, the moisture-proofing effect is weak. When the amount exceeds 45% by weight, the moisture- So that the amount of far-infrared radiation is small and the bonding strength is weak.

The mineral powder that emits far infrared rays may be used alone or as a mixture of two or more of germanium, elvan, jade and loess. Various particle sizes of 50 to 250 mesh may be used. When less than 50 wt% is mixed, the far infrared ray emissivity is small If they are mixed in an amount exceeding 70% by weight, the bonding strength may be weakened.

The mineral powder that emits far-infrared rays may be a mixture of 40 wt% of germanium having a particle size of 50 to 60 mesh, 30 wt% of elvan, 20 wt% of jade and 10 wt% of loess.

The curing agent is used for the purpose of shortening the coating time of the material. When the curing agent is mixed in less than 2% by weight, the curing time can not be shortened. When the curing agent is mixed in more than 5% by weight, .

According to another example, the surface treating agent may be used by mixing 5 to 15 parts by weight of water, if necessary.

Here, 15 to 25 parts by weight of silica airgel may be mixed with 100 parts by weight of the surface treatment material.

The surface treatment material of this other example may be formed in the same manner and thickness as the surface treatment material according to an example to form the coating layer.

The repair and reinforcement method of eco-friendly earthquake-proof reinforced concrete structure through this process is to repair and reinforce the damaged part of the concrete structure by using the inorganic polymer mortar composition, thereby improving the adhesive force, maintaining high strength and improving bending strength and durability So that the construction can be carried out quickly.

Also, by attaching the inorganic polymer mortar composition to a part of the branch-type reinforcing bar 10 so as to enclose the remaining part of the concrete structure, adhesion strength and durability can be improved and seismic performance can be increased.

In addition, it has an advantage of high workability by satisfying the high strength adhesion strength by improving adhesion by the combination of the base and the curing agent.

Meanwhile, in the process of repairing and reinforcing the concrete structure, if the damaged portion is large or damaged at the side or bottom of the structure, a process of installing a stretchable mold so that the shape of the inorganic mortar composition applied can be maintained And the like.

This will be described in detail with reference to FIGS. 7 to 10. FIG.

FIG. 7 is a view showing an example in which a retractable formwork is installed in a repair and reinforcement method of an environmental friendly anti-seismic reinforced concrete structure according to the present invention, and FIG. 8 is a view showing a retractable formwork in a repair and reinforcement method of an environment- FIG. 9 is a sectional view of a wood for explaining the expansion and contraction plate in the method of repairing and reinforcing an eco-friendly seismic strengthening concrete structure according to the present invention, and FIG. 10 is a cross- Fig. 7 is a view showing an example in which the extensible plate of the die form is deformed.

7, in the step (f), when the application of the subject to the surface of the base concrete structure is completed, the space to be filled with the inorganic polymer mortar composition mixed with water and the curing agent In step (g), an inorganic polymer mortar composition mixed with water and a curing agent is applied to the inside and outside of the extensible mold 30 so that the composition can be maintained in a constant shape until the composition is completely cured.

At this time, in the step (g) of the stretch forming mold 30, a part of the plurality of stretch forming molds 30 is installed in advance so that the composition can be easily applied, The mold 30 can be installed.

As shown in FIG. 8, the extensible form 30 is provided in a form to surround the outer surface of the composition to be constructed in step (g) so as to guide the concrete surface to its original shape. 31, a reinforcing bar 33, and an extensible plate 40.

The form plate 31 is a structure temporarily installed to form a concrete structure in a predetermined shape and dimensions, and is formed in a plate shape, and a central groove 32 is formed in the form of a wedge in the middle.

The mold plate 31 is a mold for determining the shape and dimensions of the concrete before the inorganic polymer mortar composition is applied. Since the shape of the concrete surface restored by the mold is determined, It is preferable that it is made of a material which does not exist.

For example, the form plate 31 may be made of a hard fiber board, a synthetic resin, an aluminum panel, a steel plate, or the like depending on a concrete structure for maintenance and reinforcement, Of course, can be made of a mixed material.

8, the central groove 32 has a shape that is widened inward at an intermediate portion of the form plate 31, and the extensible plate member 40, which will be described later, is fitted in the space.

At this time, the area occupied by the central groove 32 may be smaller than the area occupied by the plate-shaped form plate 31, as shown in the accompanying drawings.

Thus, when the form plate 31 is provided on the concrete surface, the center groove 32 is formed on the restored surface, and the extensible plate material 40, which will be described later, is formed on the outer side of the form plate 31, It is possible to prevent the composition applied to the restored portion from being sagged downward due to gravity in the process of curing the applied composition.

The reinforcing bar 33 is installed on the rear face of the form plate 31 so as to surround the edge of the form plate 31 and functions to prevent the form plate 31 from being warped due to various environmental factors such as moisture .

According to the design conditions, the reinforcing bar 33 is coupled in the form of wrapping the rim of the form plate 31, as shown in FIG. 8, and a vertical or transverse shape crossing the middle part of the form plate 31 Needless to say, the reinforcing bars can be further installed.

Accordingly, the form plate 31 can be supported more stably against bending.

The extensible plate member 40 is inserted into the center groove 32 and performs a function of expanding and contracting outwardly of the form plate 31. The extensible plate member 40 is formed by cutting wood in a plate shape corresponding to the center groove 32, 41 is directed toward the center groove 32 side of the extensible form 30 and the extensible face 42 formed opposite the attachment face 41 is brought into contact with the inorganic polymer mortar composition applied in step g) Is fitted into the center groove (32) so as to face the outside of the extensible form (30).

9, the attaching surface 41 of the extensible plate 40 is formed so as to extend outwardly from the wooden plate close to the depth of the wood in the state that the wooden plate is attached to the attachment surface 41 and the extensible surface 42, (42) means the water depth of the wood and the inside of the board of distant wood.

This is to utilize the properties of the treated wood, because the treated wood mainly has a property of flexing the expanded surface 42 to have a convex shape.

In other words, the treated wood generally has few knots outside the board on which the attachment surface 41 is formed and is good in texture. On the other hand, since the board in which the expansion and contraction surface 42 is formed is hard and has less shrinkage, , A deformation is made that the boat comes out toward the plane.

In addition, since the wood has a property of being curved so as to have a convex shape toward a wet surface rather than a dry surface, the composition to be applied to the concrete surface in step (g) can be obtained by mixing a hardener and water, The elastic surface 42 of the elastic member 42 sucks a predetermined amount of water by a predetermined amount of water mixed in the composition and the elastic surface 42 is wetted by the moisture more than the attachment surface 41, It becomes a tendency to bend.

Accordingly, in the present specification, a form plate 31 is provided at a portion for repairing and reinforcing the surface of concrete, and an extensible plate material having a property of bending convexly outward to the center groove 32 formed in the form plate 31 40, the elastic sheet member 40 has a property of curving convexly toward the composition side, as shown in FIG. 10, after the composition is applied in the step (g) It is possible to prevent it from being sagged downwardly.

That is, as shown in FIG. 7, when the damaged position of the structure is formed on the side surface or the lower side of the concrete structure, in order to solve the problem of difficulty in maintaining the shape due to the property that the composition flows downward before being cured, It is preferable to minimize the flow of the composition due to the bending property of the expansion and contraction plate 40 during the curing process of the composition, So that it can be restored more easily in the form of

Further, when the inorganic polymer mortar composition mixed with the water and the curing agent prepared in step (g) is cured, the installed and retractable molds 30 are removed to complete the repair and reinforcement of the damaged concrete structure .

By performing the process of installing and removing the extensible form 30, when the damaged position of the concrete structure is on the side or the lower side, the composition to be applied is minimized by the load, thereby improving the restoring force of the damaged portion And the durability can be improved by satisfying the high strength compression strength by the repair and reinforcement.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It can be seen that branch substitution, modification and modification are possible.

10: branch type reinforcing bar 20: elastic reinforcing material
30: Elastic die 31: Die plate
32: center groove 33:
40: extensible plate 41: mounting surface
42:

Claims (8)

(a) a surface treatment step of treating a surface of a concrete;
(b) a rust-rust-rust-preventive treatment step of removing the rust of the reinforcing bar exposed to the outside of the concrete and applying a rust-removing type rust inhibitor;
(c) an anti-rust inhibiting treatment step in which a coating type rust inhibitor is mixed with a cement powder and applied to a reinforcing bar exposed to the outside of the concrete;
(d) an alkaline recovery rust-preventive treatment step of applying a penetrating rust-preventive agent to the surface of the concrete to restore the alkaline resistance;
(e) installing a tubular reinforcing bar (10) on the concrete surface;
(f) an adhesion strengthening treatment step of applying a subject to the concrete surface;
(g) an inorganic-based polymer mortar composition mixed with water and a curing agent to effect construction; And
(h) a surface finishing step of applying a surface treatment material to the concrete surface,
The subject used in the step (f)
5 to 30% by weight of fine silica, 5 to 30% by weight of calcium carbonate, 4 to 30% by weight of color pigment, 1 to 30% by weight of extender pigment, 0.1 to 2% by weight of a barrier agent, 0.1 to 3% by weight of a polymerization accelerator, To 2% by weight of a dispersant, 0.1 to 0.5% by weight of a dispersant, and 20 to 45% by weight of an adhesion promoter.
The method according to claim 1,
The step (a)
(a1) a surface treatment step of piercing the steel bar to expose the steel bar using a hand tool or a power tool, and removing dirt and laitance;
(a2) an exponential reapplication step of applying the primer cement so as to cure the portion of the concrete which requires the leaking portion and the rupture index treatment; And
(a3) a washing and catching step of washing and catching high-pressure water using a high-pressure sprinkler on the surface of the concrete; and (e) repairing and reinforcing the eco-friendly seismic strengthening concrete structure.
The method according to claim 1,
The branch type reinforcing bar 10 installed in the step (e)
One end is formed in the form of a date, and the other end is formed in the form of a plurality of branches extending,
Wherein one end of the branched type reinforcing bars 10 is inserted into the perforated space of the concrete and the other end of the reinforced concrete reinforced concrete structure 10 is positioned inside the inorganic polymer mortar composition to be constructed in step g) Repair and Rehabilitation Method.
delete The method according to claim 1,
The subject
1 to 10% by weight of an additive,
The additive
A method for repairing and reinforcing an eco-friendly seismic strengthening concrete structure, which comprises at least one of a defoaming agent, a flame retardant, a dispersant, a plasticizer, an antioxidant and a surfactant.
The method according to claim 1,
The inorganic polymer mortar composition used in step (g)
A polymeric resin of from 0.5 to 1% by weight, a silica fume of from 1.3 to 2% by weight, potassium hydroxide of from 5.9 to 29% by weight, a defoaming agent of from 0.1 to 3.5% by weight 0.1 to 3.5% by weight of a fiber reinforcing material, 5 to 10% by weight of silica airgel and 2 to 3% by weight of metakaolin,
15 to 20 parts by weight of water and 5 to 10 parts by weight of a curing agent are mixed with 100 parts by weight of the mixed inorganic polymer mortar composition.
The method of claim 6,
The curing agent to be mixed with the inorganic polymer mortar composition in the step (g)
Which is a peroxide hardening agent, for repairing and reinforcing an eco-friendly seismic strengthening concrete structure.
The method of claim 6,
The step (g)
(g1) mixing 15 to 20 parts by weight of water with respect to 100 parts by weight of the mixed inorganic polymer mortar composition, mixing the curing agent in a ratio of 1: 1, and then performing the primary application; And
(g2) mixing 15 to 20 parts by weight of water with respect to 100 parts by weight of the inorganic polymer mortar composition on the surface of the step (g1), and then performing secondary application to recover the cross-section Repair and Rehabilitation Method of Environment - Friendly Seismic Retrofit Concrete Structures.

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