KR102068714B1 - rapid hardening repair and reinforcement mortar having resisting neutralization and Method of repair and reinforcement of concrete structure using the same - Google Patents

Abstract

The present invention relates to a repair and reinforcement construction method of a concrete structure and a repair and reinforcement mortar used therein, and more specifically, prevents corrosion of reinforced concrete without performing a surface reinforcing agent coating process for improving surface strength of a construction part during repair and reinforcement construction of the concrete structure. In addition, according to the present invention, efficient repair and reinforcement of the concrete structure can be possible.

Description

Rapid hardening repair and reinforcement mortar having resisting neutralization and Method of repair and reinforcement of concrete structure using the same

The present invention relates to a repair reinforcement construction method of the concrete structure and a repair reinforcement mortar used therein, and more specifically, if the surface reinforcing agent coating (application) process for improving the surface strength of the construction site during the repair reinforcement construction of the concrete structure In addition, the present invention relates to a repair method for reinforcing concrete structures, which can prevent corrosion of reinforced concrete and enable efficient reinforcement of concrete structures, and mortar used therein.

Generally, the reinforced concrete structure includes a concrete member and reinforcing bars installed to reinforce strength within the concrete member. Such reinforced concrete structures are used in bridges, tunnels, underground roadways, covered structures, etc., and are deteriorated by the quality of concrete and steel bars, environmental factors, and physical factors.

Although it is known that concrete structures can be used semi-permanently, from recent studies and studies of existing structures, concrete structures also deteriorate with changes over time, and they lose their original function, especially when decades have not passed. Cases are often reported. In concrete structures due to corrosion ^by-this way if the concrete used or reinforced concrete structure using the Maritime not remove salt from degradation shorten the RC life position on the shore has a chloride penetration from the outside (Cl) The damage is reported to be serious.

Further, to the ice or snow in the winter a salt in the chloride ion spray road (Cl ^-) sikimyeo also corrode the reinforcement penetrates into the reinforced concrete structures such as bridges, if so reinforced is corrosive rust on the surface due to the rust expanded Cracks occur in the reinforced concrete structure and degeneration proceeds.

Conventionally, in the repair of structures deteriorated by chlorine ions, a method by coating an organic surface coating agent, a method using a nitrite-based rust preventive agent, and a method of inhibiting reinforcing steel using a corrosion inhibitor and a silicate impregnator have been mainly used. The anticorrosive method by coating the organic surface coating agent has an effect of blocking the penetration of chlorine ions and carbon dioxide from the outside by forming a coating film with an acrylic or epoxy coating on the concrete or mortar surface. However, such a method has a problem that peeling, dropping, etc. due to change over time due to the use of a mother material and a heterogeneous material is deteriorated, resulting in a decrease in performance and penetration of chlorine ions and carbon dioxide.

On the other hand, the reinforcement corrosion suppression method by the rust inhibitor and the silicate-based impregnating agent can increase the alkalinity around the reinforcing bar to delay the corrosion rate to obtain a more reinforcement corrosion inhibitory effect, but when applying the silicate-based impregnating agent on the concrete surface, By not penetrating the depth of penetration, by penetrating only the surface, there is a problem in which the alkalinity increase over the entire concrete interior is substantially very unclear.

Korea Patent Registration No. 10-1166792 (Notice date 2012.07.26) Korea Patent Registration No. 10-1193022 (Notice date 2012.10.22)

Accordingly, the present inventors have made diligent research efforts to overcome the problems of the prior arts. As a result, when a specific modified siloxane is introduced as a cement mortar component, the present inventors can effectively prevent corrosion of reinforced concrete by chlorine ions. The present invention was completed by knowing a new simplified reinforcement construction method and an optimal cement mortar composition and composition ratio applied thereto, which can secure excellent physical properties without additional surface reinforcement treatment on the concrete structure portion of the construction site.

Repair reinforcement construction method of the concrete structure of the present invention for solving the above problems is a step of checking and examining the repair target site of the concrete structure; 2 steps of chipping and cleaning the damaged concrete structure; Anti-rusting the chipped and washed areas with a rust inhibitor; 4 steps of primer treatment of the anti-rust treatment site; 5 steps of applying the neutralized fast-hard maintenance reinforcement mortar to the primer treated site; And 6 steps of curing and curing before mortar curing.

As a preferred embodiment of the present invention, in the reinforcement construction method of the concrete structure of the present invention, step 2 may further perform a process for removing the rust of the reinforcing bars, if there are exposed reinforcement from the concrete structure after chipping and cleaning. .

 As a preferred embodiment of the present invention, the repair reinforcement construction method of the concrete structure of the present invention may not be subjected to additional surface reinforcement coating treatment on the repair reinforcement site after step 6.

As a preferred embodiment of the present invention, the rust preventive agent of the three-stage as a one-component rust preventive agent, may include an epoxy resin, usually portland cement, silicone oil, nitrite, sodium gluconate, water reducing agent and water.

As a preferred embodiment of the present invention, the rust preventive agent 15 to 25% by weight epoxy resin, usually 50 to 65% by weight of Portland cement, 8 to 15% by weight of silicone oil, 1 to 3.5% by weight of nitrite, sodium gluconate 0.5 to 2.0% by weight, a reducing agent 0.2-1.5% by weight and the balance of water may be included.

In one preferred embodiment of the present invention, the primer of step 4 is an aqueous acrylic resin; Calcium sulfoaluminate having a powder degree of 2,500-7,000 cm ² ; Cellulose thickeners; Cryoprotectants; Antifoaming agents; And water;

In one preferred embodiment of the present invention, the aqueous acrylic resin of the primer component comprises at least one selected from hydroxyethyl acrylate, hydroxyethyl methacrylate, ethyl hexaacrylate, butyl acrylate and butyl metal acrylate can do.

In a preferred embodiment of the present invention, in the reinforcement construction method of the concrete structure of the present invention, the neutralization fast-hard maintenance reinforcement mortar comprises 10 to 30 parts by weight of water, with respect to 100 parts by weight of mortar, the mortar is mixed cement ; Modified siloxane powder containing a porous powder on which a modified siloxane emulsion is supported; Fine powder fillers; Reemulsified powder resins; Water reducing agents; Reinforcing fibers; Silica sand; Room temperature fast curing binder; Fluorine-based water repellents; Swelling agents and neutralizing agents; may be included.

As a preferred embodiment of the present invention, the mortar is based on 100 parts by weight of mixed cement, 0.05 to 1 part by weight of modified siloxane powder, 3 to 10 parts by weight of fine powder filler, 0.5 to 5.0 parts by weight of reemulsifying powder resin, 0.05 ~ 0.50 parts by weight, reinforcing fibers 0.005 to 0.100 parts by weight, silica sand 120 to 250 parts by weight, room temperature fast curing binder 10 to 18 parts by weight, fluorine-based water repellent 0.01 to 0.20 parts by weight, expanding agent 0.001 to 0.100 parts by weight and neutralizing agent 0.5 to 2.0 It may include parts by weight.

In a preferred embodiment of the present invention, the mixed cement of the mortar component may include portland cement and alumina cement in a weight ratio of 1: 0.05 to 0.2.

In a preferred embodiment of the present invention, the modified siloxane powder contains a porous powder carrying a modified siloxane emulsion, the modified siloxane emulsion is a siloxane compound, a silane having an amino group comprising a compound represented by the following formula (1) The coupling agent, ethoxylate secondary alcohol, nonionic surfactant, and water may be mixed and hydrolyzed.

[Formula 1]

In Formula 1, R ¹ is -COOH or -COOR, R ² is -OH or -CH ₃ , m is an integer of 1 to 100, n is an integer of 0 to 100, m and n are m> n To satisfy.

In a preferred embodiment of the present invention, the siloxane-based compound may further include polydimethylsiloxane (polydimethylsiloxane).

In a preferred embodiment of the present invention, the siloxane-based compound may include a compound represented by the formula (1) and polydimethylsiloxane (PDMS, polydimethylsiloxane) 1: 0.05 to 0.3 by weight.

As a preferred embodiment of the present invention, the room temperature fast curing binder is 10 to 20% by weight magnesium cement, 10 to 25% by weight tricalcium aluminate, 7 to 15% by weight ethylene vinyl acetate-vinyl chloride copolymer resin, methyl acrylate 5 to 10% by weight of butyl acrylate copolymer resin, 2 to 5% by weight of sodium alginate, 1 to 5% by weight of polyethylene oxide, 0.1 to 2% by weight of calcium nitrite and the remaining amount of gypsum.

Another object of the present invention relates to the neutralization fast-hard maintenance reinforcement mortar used in the reinforcement construction method of the concrete structure, including mortar and water, the mortar is mixed cement; Modified siloxane powder containing a porous powder on which a modified siloxane emulsion is supported; Fine powder fillers; Reemulsified powder resins; Water reducing agents; Reinforcing fibers; Silica sand; Room temperature fast curing binder; Fluorine-based water repellents; Swelling agent; And a neutralizing agent.

In the neutralizing fast-hardening maintenance-reinforced mortar according to the present invention, the modified siloxane mixed in the mortar chemically fixes the chlorine ions, and the fixed modified siloxane and the chlorine ion form the microstructure by the filling effect to prevent corrosion of the rebar. May block or delay penetration of hazardous materials. This can achieve the effect of extending the life of the reinforced concrete structure longer. In addition, when repairing the corroded reinforced concrete using the mortar according to the repair reinforcement construction method of the concrete structure according to the present invention, it is possible to omit the surface reinforcement treatment process, which is a post-process which was performed in the existing repair method, to reduce the cost. And the process can be simplified, and the construction can be made by a customized process for the construction target, which is advantageous in terms of durability and improvement in durability and durability compared to other construction methods.

1 is a photograph showing the construction and the construction sequence to repair and reinforce the interior of the tunnel of the concrete structure according to the reinforcement construction method of the present invention.

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

Repair reinforcement construction method of the concrete structure of the present invention step 1 to check and investigate the repair target site of the concrete structure; 2 steps of chipping and cleaning the damaged concrete structure; Anti-rusting the chipped and washed areas with a rust inhibitor; 4 steps of primer treatment of the anti-rust treatment site; 5 steps of applying the neutralized fast-hard maintenance reinforcement mortar to the primer treated site; And 6 steps of curing and curing before mortar hardening. Unlike the reinforcement construction method of the existing concrete structure, an additional surface reinforcement coating treatment process is not essential to the reinforcement portion after step 6 and is omitted. What can be done is a construction method that has the advantage of shortening the overall construction period.

Referring to Figure 1, the first step is to check the repair target site in order to check the repair and reinforcement construction degree and the correct construction site when the concrete structure (A of Figure 1) where a crack site, concrete deterioration site, etc. occurs And investigating (see B of FIG. 1).

Then, step 2 is a step of performing a high pressure water wash on the chipped site after chipping the repair target site identified and irradiated in step 1. At this time, the chipping and washing method can be carried out through a general method in the art (see C, D of Figure 1).

At this time, if there are rebar exposed from the concrete structure after chipping and washing, it can be carried out by the general method performed in the art to remove the rust of the reinforcing bar (see FIG. 1E).

The third step is the construction to prevent the chipping and washed parts with a rust inhibitor, the rust inhibitor may be used a common rust inhibitor in the art, preferably epoxy resin, ordinary portland cement, silicone oil, nitrite, gluconic acid One-part anticorrosive agents including sodium, water sensitizers and water can be used.

As the epoxy resin in the rust inhibitor component, a diglycidyl epoxy resin and / or a triglycidyl epoxy resin may be used, preferably a weight average molecular weight of 350 to 3,000, and more preferably a weight average. It is preferable to use a diglycidyl epoxy resin having a molecular weight of 1,200 to 2,500. In addition, the epoxy resin content is 15 to 25% by weight, preferably 18 to 25% by weight, more preferably 18 to 23% by weight of the total weight of the rust preventive agent.

Portland cement content of the rust preventive component is usually 50 to 65% by weight, preferably 50 to 60% by weight, more preferably 50 to 55% by weight, and if the general portland cement content is less than 50% by weight of the concrete structure And there may be a problem that the adhesion of the rust-prevented site is falling, and if it exceeds 65% by weight, the viscosity of the rust-preventing agent may be difficult to prevent the construction of the rust preventive treatment.

Silicone oil of the rust inhibitor component is an oil-like nonvolatile fluid liquid mainly composed of organopolysiloxane, and is used to increase the water resistance and antifouling resistance of the rust inhibitor, and the content thereof is 8 to 15% by weight of the total weight of the rust inhibitor. It is preferable to use 8 to 13% by weight, more preferably 8 to 10% by weight. At this time, if the silicon oil content is less than 8% by weight may not increase the water resistance, pollution resistance, and if used in excess of 15% by weight may reduce the compatibility, miscibility between the other components in the rust preventive use within the above range Good to do.

The nitrite of the rust inhibitor component serves to prevent the corrosion of the steel by chemically reacting with chlorides generated or introduced into or out of the concrete structure, the nitrite may be used at least one selected from lithium nitrite and calcium nitrite, Preferably calcium nitrite can be used. And, the nitrite content may include 1 to 3.5% by weight, preferably 1.5 to 3.0% by weight, more preferably 2.0 to 3.0% by weight of the total weight of the rust preventive agent. At this time, if the nitrite content is less than 1.0% by weight, the rust prevention effect may be reduced, and the use of more than 3.5% by weight is excessive use, rather it may cause a problem of lowering the physical properties of the rust inhibitor itself by breaking the harmony between the compositions in the rust inhibitor. .

Sodium gluconate in the rust inhibitor component serves to delay the setting rate of the rust preventive agent, the content of which is 0.5 to 2.0% by weight, preferably 0.8 to 2.0% by weight, more preferably 1.0 to And 2.0 weight percent. At this time, if the sodium gluconate content is less than 0.5% by weight, the anti-corrosive agent condensation may occur too quickly, and it may be difficult to manage the anti-corrosive agent during construction.If the amount thereof exceeds 2.0% by weight, the anti-corrosive agent may be applied and the condensation rate may be delayed. It may be a problem to increase the overall reinforcement construction period is recommended to use within the above range.

Among the rust inhibitors, the sensitizer serves to increase the miscibility with other compositions by improving the dispersibility of Portland cement in the rust inhibitor, and as the sensitizer, a clay dispersant, lignosulfonate, hydroxylated carboxylate and One or more selected from carbohydrates can be used. And, the content of the reducing agent may include 0.2 to 1.5% by weight, preferably 0.5 to 1.2% by weight, more preferably 0.5 to 1.0% by weight of the total weight of the rust inhibitor, and if the content of the reducing agent is less than 0.2% by weight Too little use does not mean to use it, the content of the water content of more than 1.5% by weight is used in the above range because there is no increase in miscibility between compositions due to excessive use.

Then, the rust preventive agent is mixed with the mixture of the epoxy resin, usually Portland cement, silicone oil, nitrite, sodium gluconate, water reducing agent and water before the rust preventive treatment, and then subjected to the rust prevention treatment through a common method in the art Can be. At this time, the content of water is the remainder in the total weight of the rust inhibitor except the content of the other composition.

Next, in the construction method of the present invention, the fourth step is to perform a primer treatment for improving the adhesion to the concrete structure of the five stages of the neutralization fast-hard maintenance reinforcement mortar, protection of the rust prevention site, the four steps of the primer The general cement construction primers used in the art can be used, but preferably an aqueous acrylic resin; Calcium sulfoaluminate; Cellulose thickeners; Cryoprotectants; Antifoaming agents; And water; may be applied (or coated) to the rust-prevented site using a primer including water (see F of FIG. 1).

As the aqueous acrylic resin in the primer component, one or more selected from hydroxyethyl acrylate, hydroxyethyl methacrylate, ethyl hexaacrylate, butyl acrylate and butyl metal acrylate may be used. One or more selected from oxyethyl acrylate and hydroxyethyl methacrylate can be used.

In addition, the calcium sulfoaluminate powder is preferably 2,500 ~ 7,000 cm ² powder, preferably 2,500 ~ 5,000 cm ^{2 It} is used, the usage amount is 20 to 40 weight by weight based on 100 parts by weight of the aqueous acrylic resin Part is preferably 20 to 35 parts by weight, more preferably 25 to 35 parts by weight.

As the cellulose thickener, one or more selected from among carboxymethyl cellulose and methyl cellulose may be used to improve the viscosity of the primer. And, the amount of the use is preferably 1 to 10 parts by weight, preferably 1 to 7 parts by weight, more preferably 1 to 5 parts by weight with respect to 100 parts by weight of the aqueous acrylic resin, the amount is too small If excessive, it may be difficult to process the primer because it does not secure the proper viscosity of the primer.

The cryoprotectant serves to improve the initial strength of the primer and lower the freezing temperature, it is possible to use a conventional cryoprotectant for primers used in the art, preferably 5 to 10% by weight of the modified naphthalene condensate, 25 ~ acetate It can be used comprising 40% by weight, 5-20% by weight of potassium phosphate and the balance of propyl cellosolve. The amount of the cryoprotectant is preferably used in an amount of 0.1 to 5 parts by weight, preferably 0.2 to 3.5 parts by weight, and more preferably 0.5 to 2.5 parts by weight, based on 100 parts by weight of the aqueous acrylic resin. It can be used within the above range because it can reduce the adhesion between the neutralizing and fast-hardening reinforcement.

The antifoaming agent in the primer component is used to prevent the generation of bubbles generated during the preparation and construction of the primer, and is not particularly limited, can be used a general antifoaming agent used in the art, the amount of the use is 100 parts by weight of the aqueous acrylic resin With respect to, it is preferable to use 0.01 to 1 parts by weight, preferably 0.02 to 0.50 parts by weight, more preferably 0.02 to 0.20 parts by weight.

And water is 40-80 weight part with respect to 100 weight part of aqueous acrylic resin, Preferably it is good to use 40-70 weight part.

Next, in the construction method of the present invention, step 5 is a process of applying the neutralized fast-hard maintenance reinforcement mortar to the primer-treated site, the coating method can be used a general method used in the art.

The neutralizing fast-hardening reinforcement mortar is to improve and improve the cross-sectional recovery mortar disclosed in the applicant's Patent No. 10-1166792 through a long research and experiment, the existing cross-sectional recovery mortar can be omitted the rust prevention process However, there is a problem that there is a limit to the reinforcement construction target using this. That is, when a large amount of Cl ⁻ component is contained in the concrete structure, it is insufficient to obtain a sufficient anti-rust effect. Accordingly, the present invention, while performing the anti-corrosion process during the reinforcement construction, has developed a neutralized fast-hard maintenance reinforcement mortar that can omit the surface treatment process as follows.

The neutralization fast-hard maintenance reinforcement mortar of the present invention may include 10 to 30 parts by weight of water, preferably 15 to 25 parts by weight, based on 100 parts by weight of mortar. Here, the mortar means a mortar component which is not mixed with water.

And, the mortar is mixed cement; Modified siloxane powder containing a porous powder on which a modified siloxane emulsion is supported; Fine powder fillers; Reemulsified powder resins; Water reducing agents; Reinforcing fibers; Silica sand; Room temperature fast curing binder; Fluorine-based water repellents; Swelling agents and neutralizing agents.

Among the mortar components, the mixed cement includes portland cement (KS L 5201) and alumina cement (KS L5205). In addition, the portland cement may be used at least one selected from one kind of ordinary cement, two kinds of medium heat cement, three kinds of crude steel cement, four kinds of low heat cement and five kinds of sulfate resistant cement, preferably one kinds of ordinary cement. And five or more sulfate resistant cements. As the alumina cement, it is preferable to use three kinds of alumina cements in terms of initial compressive strength of the maintenance-reinforced mortar. When the three types of Portland cement, five types of sulfate resistant cement and three kinds of alumina cement are used, the mixing ratio thereof is 1: 0.5 to 1.5: 0.05 to 0.2 weight ratio of one type of Portland cement, five kinds of sulfate resistant cement and alumina cement. 1: 0.80 ~ 1.20: 0.10 ~ 0.15 It is advantageous to use in weight ratio in terms of usability with other compositions, mechanical properties of mortar and chemical resistance.

The modified siloxane powder in the mortar component plays a role of securing corrosion resistance of the reinforcing steel in the concrete structure through securing chlorine ions while securing excellent adhesion with the primer in the fourth step and securing adhesion between the components in the mortar. This modified siloxane powder contains a porous powder on which the modified siloxane emulsion is carried.

The modified siloxane powder is the porous powder is mixed with 80 to 250 parts by weight, preferably 100 to 150 parts by weight of the porous powder with respect to 100 parts by weight of the modified siloxane emulsion and stirred at 60 to 90 ℃ for 3 to 5 hours This may be dried at 100 to 120 ° C. for about 20 to 24 hours to prepare a porous powder (modified siloxane powder) on which the modified siloxane emulsion is supported. The porous powder may use one or more selected from zeolite, silica gel and activated alumina having an average particle size in the range of 1 to 10 μm, and serves to prepare a powder by supporting a modified siloxane emulsion, the amount of which is used as a modified siloxane emulsion 100 If the amount is less than 80 parts by weight, the amount of the modified siloxane emulsion is too high, so it is difficult to prepare a powder, and if it exceeds 250 parts by weight, the concentration of the modified siloxane component may be too low.

The modified siloxane emulsion is prepared by mixing and hydrolyzing a siloxane compound, a silane coupling agent having an amino group, an ethoxylate secondary alcohol having 10 to 20 carbon atoms, a nonionic surfactant, and water.

The siloxane-based compound includes a compound represented by the following Chemical Formula 1, and the inorganic component of the concrete structure and -COOH, -COOR and / or -OH of the compound is chemically bonded to the action of the alkyl group bonded to the siloxane It can play a role of preventing water penetration.

[Formula 1]

In the general formula 1 R ¹ is -COOH or -COOR, preferably -COOH. In addition, R ² of Formula 1 is -OH or -CH ₃ , preferably -OH. And m in chemistry 1 is an integer from 1 to 100, n is an integer from 0 to 100, preferably m is an integer from 5 to 70, n is an integer from 0 to 50, more preferably m Is an integer of 5-50, n is an integer of 0-25. And m and n satisfy m> n.

In addition, the siloxane-based compound may further include polydimethylsiloxane (PDMS, polydimethylsiloxane), when using the compound represented by the formula (1) and PDMS 1: 1: 0.05 to 0.3 weight ratio, preferably 1 : It is good to mix and use by 0.1 to 0.2 weight ratio. By adding PDMS, it is possible to obtain the effect of improving salt resistance and improving the physical properties of mortar.

In addition, the siloxane-based compound is preferably a viscosity of 100 ~ 10,000 cps (25 ℃), more preferably 1,000 to 6,000 cps (25 ℃), and less than 100 cps porous powder because the viscosity is too low There may be a problem that the physical properties are not improved due to the penetration of the micro-pores, and if the use of more than 10,000 cps may have a problem that it is difficult to be supported in the porous powder because the viscosity is too high, use those having a viscosity within the above range Good to do.

In addition, the silane coupling agent having the amino group in the modified siloxane emulsion component plays a role of improving durability such as neutralization inhibition, chlorine ion immobilization, and the mechanism thereof is shown in Schemes 1 and 2. The silane coupling agent having the amino group is N- (3-trimethoxysilylpropyl) amine, N- (3-triethoxysilylpropyl) amine, N- (3-methyldimethoxysilylpropyl) amine, N- Use of at least one selected from (3-trimethoxysilylpropyl) ethylenediamine, N- (3-triethoxysilylpropyl) diethylamine and N- (3-methyldimethoxysilylpropyl) ethylenediamine It is desirable to.

Scheme 1

Scheme 2

In Reaction Scheme 1 and Scheme 2, R ¹ , R ² and R ³ are the same as or different from each other, R ¹ is a silanol group, R ² and R ³ is a C ₁ ~ C ₁₂ aliphatic alkyl group, silanol group or hydrogen 1 type selected from atoms.

The modified siloxane emulsion is 45 to 60% by weight of the siloxane compound, 10 to 25% by weight of the silane coupling agent, 5 to 15% by weight of the ethoxylate secondary alcohol and 0.5 to 5% by weight of the nonionic surfactant and the balance It may be prepared by mixing water to hydrolyze, preferably 48 to 55% by weight of the siloxane compound, 12 to 22% by weight of the silane coupling agent, 7 to 10% by weight of the ethoxylate secondary alcohol and nonionic It can be prepared by hydrolysis by mixing 1.5 to 3.5% by weight of the surfactant and the balance of water. In this case, when the siloxane compound is out of 45 to 60% by weight, the anti-corrosion effect may be lowered or sufficient adhesion and mechanical properties of mortar may not be secured. When the amount of the silane coupling agent exceeds 10 to 25% by weight, There may be a problem that the chlorine ion immobilization effect is low or the modified siloxane emulsion is gelled.

The amount of the modified siloxane powder is preferably 0.05 to 1 parts by weight, preferably 0.10 to 1.00 parts by weight, more preferably 0.35 to 1.00 parts by weight, based on 100 parts by weight of the mixed cement, and the amount of the modified siloxane powder is 0.05 parts by weight. If less than parts, there may be no sufficient anti-corrosion effect increase and no surface strengthening of the reinforcement-reinforced mortar, and using more than 1 part by weight is uneconomical.

The fine powder filler of the mortar component is a filler composed of fine gypsum and slag, and when the mortar composition for cross-sectional recovery is cured, the micropore is filled to densify the tissue, improve the durability of the mortar for cross-sectional recovery and chemical erosion by sulfate or chloride ion It serves to protect the concrete structure by, the fine powder filler is preferably in terms of improving the durability of mortar to use a powder of 6,000 ~ 10,000 cm ² / g. In addition, the amount is preferably 3 to 10 parts by weight, preferably 4 to 8.5 parts by weight based on 100 parts by weight of the mixed cement, and when the amount is less than 3 parts by weight, the compressive strength is low because the structure is not dense. When used in excess of 10 parts by weight, the amount of use of other components may be relatively decreased, which may cause deterioration of other physical properties.

Among the mortar components, reemulsifying powder resin forms a polymer film during the mortar hardening process to prevent evaporation of water to prevent plastic shrinkage, and improves durability by blocking harmful substances such as water or carbon dioxide from outside after hardening. It plays a role. The re-emulsifying powder resin is not particularly limited, but polyvinyl alcohol vinyl acetate (polyvinylalcohol vinylacetate); And vinyl acetate, vinyl versatate polymer; It is preferable to use one or more selected from among them. In addition, the amount of use is preferably 0.5 to 5 parts by weight, preferably 0.5 to 3 parts by weight, more preferably 0.75 to 2.0 parts by weight, based on 100 parts by weight of the mixed cement, in which case less than 0.5 parts by weight is used. When the polymer film is formed, the bonding is weak, and there may be a problem in that the harmful substance blocking effect and durability improvement contribution are lowered, and when used in excess of 5 parts by weight, it may interfere with the curing of the mortar and cause adverse effects.

In the mortar component, the water reducing agent is used to secure the fluidity of the mortar and prevent durability degradation that may occur due to the use of the modified siloxane emulsion, and it is preferable to use a naphthalene sulfonic acid water reducing agent and / or a riboic acid water reducing agent. It is good to use 0.05-0.50 weight part with respect to 100 weight part of mixed cement, Preferably 0.10-0.40 weight part. At this time, if the amount of the reducing agent is used less than 0.05 parts by weight may not be able to see a sufficient durability reduction prevention effect, when used in excess of 0.50 parts by weight rather than the amount is used because the curing is delayed and the durability may be lowered within the above range It is preferable to use.

The reinforcing fiber of the mortar component is to improve the tensile strength of the mortar, to increase the tensile stress during plastic shrinkage and dry shrinkage, to impart crack resistance that may occur in long-term age, and to improve the construction thickness when spraying It is for. At this time, the amount of use is preferably 0.005 to 0.100 parts by weight, preferably 0.01 to 0.07 parts by weight with respect to 100 parts by weight of the mixed cement, and when used below 0.005 parts by weight, sufficient tensile strength improvement effect cannot be seen. If there is a problem, when used in excess of 0.100 parts by weight, it is preferable to use within the above range because it may not be well sprayed due to the agglomeration.

Among the mortar components, the silica sand has aggregate density, which reduces dry shrinkage that may occur during hardening, and also increases the stiffness of the mortar, and is an aggregate component, which is used in an amount of 120 to 250 based on 100 parts by weight of mixed cement. It is preferable to use a weight part by weight, Preferably it is 150-200 weight part.

The room temperature fast-hard binder in the mortar component is used to allow the mortar to cure rapidly even at room temperature after application, 10 to 20% by weight of magnesium cement, 10 to 25% by weight of tricalcium aluminate, ethylene vinyl acetate-vinyl chloride air 7-15 wt% of copolymer resin, 5-10 wt% of methyl acrylate-butylacrylate copolymer resin, 2-5 wt% of sodium alginate, 1-5 wt% of polyethylene oxide, 0.1-2 wt% of calcium nitrite and the balance What is prepared by mixing and stirring gypsum is preferably 15 to 18% by weight of magnesium cement, 15 to 20% by weight of tricalcium aluminate, 8 to 12% by weight of ethylene vinyl acetate-vinyl chloride copolymer resin, methylacrylate- 7-9% by weight of butyl acrylate copolymer resin, 2-4% by weight of sodium alginate, 1-3% by weight of polyethylene oxide, 0.5-1.0% by weight of calcium nitrite and remaining gypsum On the contrary, the produced one can be used. In addition, the amount of the room temperature fast-curing binder is used in an amount of 10 to 18 parts by weight, preferably 10 to 15 parts by weight, with respect to 100 parts by weight of mixed cement, and if the amount is less than 10 parts by weight, the amount is less. Due to the use, the effect of increasing the mortar curing rate may be insignificant, and the mortar curing time may be so fast that cracks may occur in the repaired site after curing, or the mechanical properties may be lowered.

In addition, the fluorine-based water repellent agent of the mortar component serves to prevent the deterioration of the structure caused by water penetrating into the concrete structure (waterproof effect) and to impart an anti-mold effect, and generally the components contained in the acid rain is cement hydrate and the reaction and expanding the concrete, the chloride ion contained in the salt damage (Cl ^-), using the calcium hydroxide with the chemical reaction through to elute the salt bar capable of the Republic tissue of the concrete, the fluorine-based water repellent agent in the cement water By preventing penetration, concrete durability can be improved. The amount of the fluorine-based water repellent may be used in an amount of 0.01 to 0.20 parts by weight, preferably 0.05 to 0.15 parts by weight, based on 100 parts by weight of the mixed cement. If the amount of the fluorine-based water repellent is too small, the waterproof effect may not be sufficient. It is not economical to use more than 0.20 part by weight, and the effect of the modified siloxane emulsion can be reduced, so it is preferable to use it within the above range.

Among the mortar components, the expanding agent is used to prevent cracks due to a rapid decrease in the volume of cement during curing of the mortar, but may be generally used in the art, but preferably quicklime (CaO) and alumina clinker powder (C3A ), O can be used to wingye clinker powder (CSA), anhydrite (CaSO _4), yisuseok and (CaSO ₄ · 2H ₂ O) and half of gypsum (CaSO ₄ · 1 or more kinds selected from the 1 / 2H ₂ O), Preferably, at least one selected from alumina clinker powder, Irwin-based clinker powder, dihydrate gypsum and hemihydrate gypsum may be used. The amount of the expansion agent is preferably 0.001 to 0.100 parts by weight, preferably 0.01 to 0.05 parts by weight, and more preferably 0.02 to 0.05 parts by weight based on 100 parts by weight of the mixed cement. At this time, when the amount of the inflator is less than 0.001 parts by weight, the amount of the inflator is too small to see the effect due to the use of the inflator, and when used in excess of 0.100 parts by weight, the mortar's adhesiveness, adhesion, or mortar curing is rather reduced due to the effect of the inflator. After that, since the density of the concrete may be lowered and the strength may be weakened, it is preferable to use it within the above range.

Among the mortar components, the neutralizing agent serves to prevent the reinforcing-reinforced portion and the concrete around the portion from being neutralized by deterioration of concrete properties after the reinforcement construction, and 30 to 40 wt% of the ternary acrylic copolymer and polysiloxane. 10 to 20% by weight and the residual amount of the solvent, preferably 35 to 40% by weight of the quaternary acrylic copolymer and 10 to 15% by weight of polysiloxane and the residual amount of the solvent may be included. At this time, the quaternary acrylic copolymer is a copolymer of methyl methacrylate, n-butyl methyl methacrylate, methacrylic acid and glycidyl methacrylate. The polysiloxane may include poly (methyl-phenyl) siloxane, and the solvent may include one or more selected from ethylene carbonate and diethyl carbonate. The amount of the neutralizing agent used is 0.5 to 2.0 parts by weight, preferably 0.5 to 1.6 parts by weight, and more preferably 0.7 to 1.4 parts by weight based on 100 parts by weight of the mixed cement, and the overall mortar to ensure the physical properties and repaired. Good in terms of anti-neutralization.

The neutralizing fast-hard maintenance reinforcing mortar having such a composition and composition ratio may be sprayed as shown in FIG.

And, in the construction method of the present invention, after the plastering the mortar coated in step 5, curing (curing of FIG. 1F) can be repaired and reinforced construction of the concrete structure.

After completion of construction, the test can be completed by passing the test by testing the adhesion test of the cured mortar as shown in I of FIG. 1 (see K of FIG. 1).

Hereinafter, the present invention will be described in more detail with reference to Examples, but the following Examples are not intended to limit the scope of the present invention, which should be construed as to help the understanding of the present invention.

 EXAMPLE

Preparation Example 1 Preparation of Antirust Agent

Type 1 ordinary 5% by weight Portland cement, 21.5% by weight of diglycidyl epoxy resin having a weight average molecular weight of 1,600 to 1,800, 9.2% by weight of silicone oil, 2.6% by weight of calcium nitrite, 1.45% by weight of sodium gluconate, and carbohydrate 0.73 A rust preventive agent was prepared by mixing the wt% and the balance of water.

Preparation Example 2 Preparation of Primer

30 parts by weight of calcium sulfoalmuate having a powder degree of 2,600 to 3,800 cm ² with respect to 100 parts by weight of hydroxyethyl acrylate resin, 3.4 parts by weight of carboxymethyl cellulose as a thickener, 1.7 parts by weight of a cryoprotectant for primer and 0.1 weight of antifoaming agent. 58 parts by weight of water and water were mixed and stirred to prepare a primer.

At this time, the cryoprotectant for the primer includes 8% by weight of the modified naphthalene condensate, 34.2% by weight of acetate, 10.5% by weight of potassium phosphate, and the remaining amount of propyl cellosolve.

Example 1 Preparation of Neutralization Fast Hardening Reinforcement Mortar

1) Preparation of Modified Siloxane Emulsion

Using a high-speed stirrer at room temperature by adjusting the stirring speed to 3000 rpm suited ray Ethoxylated C ₁₅ secondary alcohol _{(C 15 ethoxylated secondary alcohol, DOW} CHEMICAL COMPANY, TERGITOL? 15-S-20) was added to 10% by weight non-ionic After adding 1% by weight of surfactant (AK Chemtech Co., Ltd. ASCO SP60), 48% by weight of siloxane compound (viscosity 4,500-4,800 cps at 25 ° C) and water were added thereto. The mixture was emulsified by stirring for 1 hour, and the stirring speed was adjusted to 100 rpm, followed by N-3- (3-trimethoxysilylpropyl) ethylenediamine (DOW CORNING, Z-6020) which is a silane coupling agent. 7.8 weight % Was added followed by hydrolysis for 2 hours to produce a modified siloxane emulsion. At this time, the content of water is the weight% of the balance in 100% by weight of the emulsion, excluding other components used in the preparation of the modified siloxane emulsion.

 [Formula 1-1]

In Formula 1-1, R ¹ is -COOH, R ² is -OH, m is an integer of 15 to 16, n is an integer of 3 to 4.

2) Preparation of Modified Siloxane Powder

115 parts by weight of a porous powder (jisimtech Co., Ltd., JST-MS40) is added to 100 parts by weight of the modified siloxane emulsion, and then stirred at 100 rpm at 80 ° C. for 4 hours, followed by drying at 110 ° C. for 24 hours. Powder was prepared.

3) mortar manufacturing

0.48 parts by weight of the modified siloxane powder of Preparation Example 1, 6.7 parts by weight of fine powder filler (manufacturer: Hanil Cement, trade name: Omega 2000), and retype type powder resin (manufacturer: Elotex trade name: FL1210) 1.2 weight parts Part, water reducing agent (manufacturer: cage brand name: Powercon 100) 0.25 parts by weight, reinforcing fiber (manufacturer: Nikon material brand name: PP Fiber) 0.032 part by weight, silica sand (manufacturer: natural history, brand name: No. 4, 5, 6 ) 176 parts by weight, 12.2 parts by weight of the fast binder, 0.10 parts by weight of fluorine-based water repellent, 0.023 parts by weight of expanding agent and 1.05 parts by weight of neutralizing agent were mixed and stirred as in Table 1 to prepare a mortar.

As the mixed cement, a mixed cement obtained by mixing five types of sulfate resistant portland cement (manufacturer: Hanil Cement) and three kinds of alumina cement (manufactured: fondu) in a weight ratio of 1: 0.03 was used.

In addition, the fast binder is 16.8% by weight of magnesium cement, 17.3% by weight of tricalcium aluminate, 10% by weight of ethylene vinyl acetate-vinyl chloride copolymer resin, 8.1% by weight of methyl acrylate-butylacrylate copolymer resin, sodium alginate 2.9% by weight, polyethylene oxide 1.5% by weight, calcium nitrite 0.8% by weight and the remaining gypsum were used by mixing and stirring.

The neutralizing agent is 34.5% by weight of a quaternary acrylic copolymer copolymerized with methyl methacrylate, n-butylmethylmethacrylate, methacrylic acid and glycidyl methacrylate, and 12.7% by weight of poly (methyl-phenyl) siloxane. And the remaining amount of diethyl carbonate (solvent) were mixed and used.

Comparative Example 1

1) Preparation of Modified Siloxane Emulsion

Federated secondary alcohol ethoxylate C ₁₅ the stirring rate using a high-speed stirrer to control at 3000 rpm in water of 40% by weight at room temperature _{(C 15 ethoxylated secondary alcohol, DOW} CHEMICAL COMPANY, TERGITOL? 15-S-20) 10 wt% 1% by weight of a nonionic surfactant (ASCO SP60), and 40% by weight of PDMS (DOW CORNING, MH-1109) having -OH were added thereto, followed by emulsification by stirring for 1 hour. , The stirring speed was adjusted to 100 rpm and 9% by weight of N-3- (3-trimethoxysilylpropyl) ethylenediamine (DOW CORNING, Z-6020) was added, followed by hydrolysis for 2 hours to denature. The siloxane emulsion was prepared.

2) Preparation of Modified Siloxane Powder

To 100 parts by weight of the modified siloxane emulsion was added 100 parts by weight of a porous powder (jisimtech Co., Ltd., JST-MS40), and stirred for 4 hours at 80rpm at 100rpm, dried at 110 ℃ for 24 hours to modify the modified siloxane Powder was prepared.

3) Cement mortar manufacture

Comparative Example 1 was prepared by mixing 0.20 parts by weight of the modified siloxane powder prepared above with respect to 100 parts by weight of the cement mortar having the composition of Table 3 to prevent the corrosion of the reinforced concrete.

Examples 2 to 7 and Comparative Examples 2 to 5

Using the same composition as in Example 1 to prepare a mortar composition for repairing the concrete structure, Examples 2 to 7 and Comparative Examples 2 to 5 were carried out to have a composition as shown in Tables 1 to 2.

Comparative Example 6

Using the same composition as in Example 1 to prepare a mortar composition for repairing concrete structures, as a fast binder, without using a methyl acrylate-butyl acrylate copolymer resin, magnesium cement 16.8% by weight, tricalcium aluminium 17.3 wt% Nate, 10 wt% Ethylene vinyl acetate-vinyl chloride copolymer resin, 2.9 wt% Sodium Alginate, 1.5 wt% Polyethylene oxide, 0.8 wt% Calcium Nitrite and the remaining gypsum were mixed and stirred to prepare.

division
(Part by weight) Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Example 7 Mixed cement
(Weight ratio) Class 1 Portland Cement One One One One One One One 5 types of sulfate resistant cement One One One One One One 0.65 3 kinds of alumina cement 0.013 0.013 0.013 0.013 0.013 0.013 0.013 Mixed cement 100 parts by weight Modified siloxane powder Preparation Example 1 0.48 0.15 0.95 0.48 0.48 0.48 0.48 PDMS - - - 0.058 - - - Fine powder filler 6.7 6.7 6.7 6.7 6.7 6.7 6.7 Reemulsifying Powder Resin 1.2 1.2 1.2 1.2 1.2 1.2 1.2 Water reducing agent 0.25 0.25 0.25 0.25 0.25 0.25 0.25 Reinforcing fiber 0.032 0.032 0.032 0.032 0.032 0.032 0.032 Quartz sand 176 176 176 176 176 176 176 Fast hard binder 12.2 12.2 12.2 12.2 10.0 18.0 12.2 Fluorinated Water Repellent 0.10 0.10 0.10 0.10 0.10 0.10 0.10 Inflator 0.023 0.023 0.023 0.023 0.23 0.023 0.023 A neutralizer 1.05 1.05 1.05 1.05 1.05 1.05 1.05

division
(Part by weight) Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 Comparative Example 6 Mixed cement
(Weight ratio) Class 1 Portland Cement One One One One One One 5 types of sulfate resistant cement - - One One One One 3 kinds of alumina cement 0.1 0.1 - 0.013 0.013 0.013 Mixed cement 100 parts by weight Modified siloxane powder Preparation Example 1 - - 0.48 0.48 0.48 0.48 PDMS 0.90 - - - - - Fine powder filler 6.7 6.7 6.7 6.7 6.7 6.7 Reemulsifying Powder Resin 1.2 1.2 1.2 1.2 1.2 1.2 Water reducing agent 0.25 0.25 0.25 0.25 0.25 0.25 Reinforcing fiber 0.032 0.032 0.032 0.032 0.032 0.032 Quartz sand 176 176 176 176 176 176 Fast hard binder - - 12.2 8.0 20.0 12.2 Fluorinated Water Repellent - - 0.10 0.10 0.10 0.10 Inflator - - 0.23 0.23 0.23 0.23 A neutralizer - - 1.05 1.05 1.05 1.05

Experimental Example 1: Measurement of the physical properties of mortar 1

The air volume test is currently defined in KS L 3136, "Measuring Air Volume of Hydraulic Cement Mortar," but this method is a gravimetric method, which is difficult in the field application. Therefore, in consideration of the ease of measurement and precision in the field, ASTM C 780 `` A6. MORTAR AIR CONTENT TEST METHOD ”was tested according to the pressure method test method.

The compression and flexural strength of the hardened mortar were evaluated in accordance with KS F 2476, "Strength Test Method for Polymer Cement Mortar". Permeability was tested according to the test method defined in ASTM C 1202 (see Table 3), and the results are shown in Table 4.

Experiment item Measurement item Test specification Hard Mortar
Physical properties Air volume ASTM C 780 Unit weight KS F 3136 Cured Mortar
Physical properties Compressive strength KS F 2476 Flexural strength KS F 2476 Adhesive strength KS F 4716 Chlorine Ion Penetration Resistance ASTM C 1202

division Unit weight
(kg / ㎥) Air volume
(%) Compressive strength
(kgf / ㎠) Flexural strength
(kgf / ㎠) Adhesion strength
(kgf / ㎠) Chlorine Ion
Penetration resistance
(Coulombs) 1 day 7 days 28 days 7 days 28 days 7 days 28 days Example 1 2,080 5.5 85 417 579 85 98 18.3 20.4 257 Example 2 2,081 5.5 84 406 542 83 93 18.4 19.6 335 Example 3 2,078 5.6 85 418 584 83 100 18.9 20.4 235 Example 4 2,080 5.5 88 423 593 87 104 19.2 20.8 167 Example 5 2,077 5.4 58 397 554 75 94 17.2 18.4 272 Example 6 2,079 5.3 93 439 580 88 100 19.5 21.9 305 Example 7 2,080 5.5 57 410 565 82 96 16.3 18.9 298 Comparative Example 1 2,067 5.5 53 370 534 74 91 16.1 19.5 195 Comparative Example 2 2,056 6.0 51 375 496 70 85 15.8 19.6 789 Comparative Example 3 2,077 5.4 54 385 535 75 95 16.3 20.4 288 Comparative Example 4 2,078 5.4 55 380 540 75 92 19.3 21.7 227 Comparative Example 5 2,080 5.4 94 442 581 89 102 19.5 22.6 318 Comparative Example 6 2,078 5.5 85 414 582 85 97 18.0 21.3 263

Looking at the measurement results of Table 4, in Comparative Example 1 using the PDMS instead of the modified siloxane powder of Preparation Example 1, compared with Examples 1 to 7, the overall low mechanical properties value was shown, the modification In the case of Comparative Example 2 in which no siloxane powder itself was used, not only the mechanical properties but also the chlorine ion penetration resistance were very poor in comparison with Examples.

In Comparative Example 3, which did not use alumina cement in cement, the adhesion strength was lower than that of Example 1, and the results were similar to those of Comparative Example 1.

And, in Comparative Example 4 using less than 10 parts by weight of the fast-hardening binder, compared with Examples 1 and 5, the chlorine ion resistance and adhesion strength is somewhat superior, but the initial compressive strength and the compressive strength after 28 days and There was a problem of low bending strength.

In addition, in the case of Comparative Example 5 using more than 18 parts by weight of the fast-hardening binder, compared with Example 6, there was a problem that only the chlorine ion resistance is reduced rather than the mechanical properties increase effect.

In addition, in the case of Comparative Example 6 using a fast curing binder containing no methyl acrylate-butyl acrylate copolymer resin, compared with Example 1, the other physical properties are almost similar, but there was a problem that the adhesion strength is significantly lowered .

Experimental Example 2 Measurement of Mortar Physical Properties 2

After curing the mortar of Example 1 and Comparative Example 1, the evaluation was carried out according to the KS F 4042 cross-sectional recovery mortar quality standards test method, the results are shown in Table 5 below.

Item Reference value Example 1 Comparative Example 1 Flexural strength (N / ㎡) 6.0 and above 9.3 9.0 Compressive strength (N / ㎡) 20.0 or more 55.8 53.4 Adhesion strength
(N / mm2) Standard condition 1.0 or higher 2.0 1.9 After repeated hot and cold 1.0 or higher 1.9 1.6 Alkali resistance Compressive strength over 20.0 N / ㎡ 49.7 47.4 Neutralization Resistance (mm) 2.0 or less 0.2 0.4 Permeability (g) 20.0 or less 1.57 1.60 Water Absorption Coefficient (㎏ / ㎡ · h ^0.5 ) 0.5 or less 0.020 0.031 Moisture penetration resistance (m) 2 m or less 0.97 1.20 Chloride Ion Penetration Resistance (Coulombs) 1,000 or less 257 195 Sulfuric acid resistance (5% solution, weight change rate) - 5.0 5.6 Length change (%) ± 0.15 or less -0.009 -0.011

Looking at the experimental results of Table 5, Example 1 and Comparative Example 1 both obtained the results exceeding the quality standards specified in KS F 4042. In addition, although chloride ion permeation resistance was comparatively better than that of Example 1 in Comparative Example 1, other physical properties of Example 1 showed not only mechanical properties but also overall excellent results in terms of chemical properties.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited thereto, and various modifications and changes can be made within the scope of the technical idea of the present invention, which also belong to the appended claims. It is natural.

When the reinforcement construction of the deteriorated or corroded concrete structure using the neutralizing fast-hardening reinforcement mortar of the present invention, it is possible to provide a reinforced concrete structure extending the life of the reinforced concrete structure longer, the existing reinforcement construction It can omit the surface reinforcement treatment process that has been carried out in the company, which can reduce the cost and simplify the process, and can provide economical reinforcement construction methods. It is possible to construct and reinforce various concrete structures with high economic efficiency.

Claims (10)

1 step of identifying and inspecting the repair target site of the concrete structure;
2 steps of chipping and cleaning the damaged concrete structure;
Anti-rusting the chipped and washed areas with a rust inhibitor;
4 steps of primer treatment of the anti-rust treatment site;
5 steps of applying the neutralized fast-hard maintenance reinforcement mortar to the primer treated site; And
6 stages of curing and curing before mortar curing;
The neutralization fast-hard maintenance reinforcement mortar comprises 10 to 30 parts by weight of water, based on 100 parts by weight of mortar,
The mortar is mixed cement; Modified siloxane powder containing a porous powder on which a modified siloxane emulsion is supported; Fine powder fillers; Reemulsified powder resins; Water reducing agents; Reinforcing fibers; Silica sand; Room temperature fast curing binder; Fluorine-based water repellents; Swelling agent; And a neutralizing agent;
The modified siloxane emulsion is a concrete characterized by mixing and hydrolyzing a siloxane-based compound comprising a compound represented by the following formula (1), a silane coupling agent having an amino group, an ethoxylate secondary alcohol, a nonionic surfactant and water Reinforcement construction method of structure:
[Formula 1]

In Formula 1, R ¹ is -COOH or -COOR, R ² is -OH or -CH ₃ , m is an integer of 1 to 100, n is an integer of 0 to 100, m and n are m> n To satisfy.
The method of claim 1, wherein in the second step, when there are rebars exposed from the concrete structure after chipping and washing, the process of reinforcing and strengthening the concrete structure further comprises removing the rust of the rebar.
The method according to claim 1, wherein after the sixth step, the additional reinforcement coating is not applied to the reinforcement part.
The method of claim 1, wherein the anti-corrosive agent is a one-component anti-corrosive agent, comprising epoxy resin, ordinary portland cement, silicone oil, nitrite, sodium gluconate, water reducing agent, and water.
According to claim 4, wherein the rust inhibitor 15 to 25% by weight epoxy resin, usually 50 to 65% by weight Portland cement, 8 to 15% by weight silicone oil, 1 to 3.5% by weight nitrite, 0.5 to 2.0% by weight sodium gluconate , Reinforcement construction method of the concrete structure, characterized in that it comprises a water reducing agent 0.2 ~ 1.5% by weight and the remaining amount.
The method of claim 1, wherein the room temperature fast curing binder is gypsum 20-30% by weight, tricalcium aluminate 10-20% by weight, ethylene vinyl acetate-vinyl chloride copolymer resin 2-5% by weight, methyl acrylate-butylacrylic Reinforcement of concrete structures comprising 5 to 10% by weight of latex copolymer resin, 2 to 5% by weight of sodium alginate, 1 to 5% by weight of polyethylene oxide, 0.1 to 2% by weight of calcium nitrite and residual magnesium cement Construction method:
The method of claim 1, wherein the mixed cement comprises Portland cement and alumina cement in a weight ratio of 1: 0.05 to 0.2,
The mortar is based on 100 parts by weight of mixed cement, 0.05 to 1 part by weight of modified siloxane powder, 3 to 10 parts by weight of fine powder filler, 0.5 to 5.0 parts by weight of reemulsifying powder resin, 0.05 to 0.50 parts by weight of reducing agent, and 0.005 to 0.100 of reinforcing fiber. Part by weight, 120 to 250 parts by weight of silica sand, 10 to 18 parts by weight of the room temperature fast binder, 0.01 to 0.20 parts by weight of the fluorine-based water repellent, 0.001 to 0.100 parts by weight of the expanding agent and 0.5 to 2.0 parts by weight of the neutralizing agent Reinforcement construction method of structure:
The method of claim 1, wherein the siloxane compound further comprises polydimethylsiloxane (polydimethylsiloxane),
Repair and reinforcement construction method of a concrete structure, characterized in that the compound represented by the formula (1) and polydimethylsiloxane (PDMS, polydimethylsiloxane) 1: 1: 0.05 to 0.3 by weight.
delete Mortar and water,
The mortar is mixed cement; Modified siloxane powder containing a porous powder on which a modified siloxane emulsion is supported; Fine powder fillers; Reemulsified powder resins; Water reducing agents; Reinforcing fibers; Silica sand; Room temperature fast curing binder; Fluorine-based water repellents; Including expanding agent and neutralizing agent,
The mixed cement includes Portland cement and alumina cement in a weight ratio of 1: 0.05 to 0.2,
The modified siloxane emulsion is a mixture of the siloxane-based compound containing a compound represented by the following formula (1), a silane coupling agent having an amino group, an ethoxylate secondary alcohol, a nonionic surfactant and water and hydrolyzed Neutralizing fast hardening reinforcement mortar;
[Formula 1]

In Formula 1, R ¹ is -COOH or -COOR, R ² is -OH or -CH ₃ , m is an integer of 1 to 100, n is an integer of 0 to 100, m and n are m> n To satisfy.

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