KR102063118B1 - A concrete structures seismic reinforcing and repairing composition and the seismic reinforcing and repairing method thereof - Google Patents

Abstract

The present invention relates to a polyurea repairing agent composition for waterproof, corrosion resistance, and seismic reinforcement of a concrete structure; and a method for repairing a concrete structure using the same. The polyurea repairing agent composition of the present invention comprises: a polyurea resin; an acrylic polymer; an elastomer; an inorganic reinforcing material; an additive; at least one kind of reinforcing fiber material; and an appropriate amount of mixed water.

Description

A concrete structures seismic reinforcing and repairing composition and the seismic reinforcing and repairing method

The present invention relates to a waterproof structure, waterproofing method, seismic reinforcement polyurea repair composition and concrete structure repair method using the same, more specifically 1,6-hexane diisocyanate (HDI), isophorone diisocyanate (IPDI), At least one selected from methylene bis (p-cyclohexyl isocyanate) (H12 MDI), toluene diisocyanate (TDI), naphthalene diisocyanate (NDI), methylenediphenyl diisocyanate (MDI), and toluene diisocyanate (TODI) Polyurea resins comprising a polyisocyanate motif and a curing agent comprising butanediol (BD), ethylenediamine (ED), methylenebischloroaniline (MOCA), ethylene glycol (EG), hexanediol (HD); Acrylic polymer which emulsified-polymerized the monomer containing methyl methacrylate (MMA), 2-ethylhexyl acrylate (2-EH), acrylic acid (AAc), and 2-hydroxyethyl methacrylate (2-HEMA); Elastomers including ethylene vinyl acetate (EVA) and SBR latex; An inorganic reinforcing material comprising a silica gel powder generated during a silica gel manufacturing process and a waste artificial marble powder obtained by grinding waste artificial marble; Additives including quickeners, curing accelerators, and dispersants; At least one reinforcing fiber material selected from glass fiber, steel fiber, polyester fiber, nylon fiber, polypropylene (PP) fiber, cellulose fiber and carbon fiber; It relates to a concrete structure waterproofing, anticorrosion, earthquake-resistant reinforcement polyurea repair composition comprising a suitable amount of water; and a concrete structure repair method using the same.

In general, reinforced concrete structures are threatened not only to durability of the concrete structure but also to structural safety due to deterioration such as neutralization, salt damage, chemical erosion, freeze-thawing, and poor construction, resulting in concrete dropping and steel corrosion.

Therefore, if the deterioration of such a concrete structure continues, there is a risk that will eventually lead to the collapse of the structure, it is necessary to continuously manage and repair.

That is, peeling, defects, cracks, etc. of concrete structures facilitate the movement of deterioration factors, thereby facilitating the progress of deterioration. Therefore, in order to secure safety and performance of reinforced concrete structures, repair is performed at the early stage of deterioration to suppress further progress of deterioration. It is necessary to improve the durability.

Accordingly, conventionally, a method of constructing a waterproofing or anticorrosive concrete is known by constructing a protective film by applying a resin material such as epoxy or urethane to the concrete surface, and a polyurea waterproofing and repairing method for coating a polyurea resin is widely used. have.

The polyurea is generally a resin produced by a chain reaction of an isocyanate prepolymer and an amine. The polyurea has a wide range of applications because it has a fast drying time and exhibits excellent physical properties as compared with conventional epoxy or urethane.

For example, polyurea is used for surface protection and flooring of chemical tanks, piping, pipes, steel pipes, various rebar and concrete structures, ships, chemical plants, oil refineries, power plants, water treatment facilities, and the like.

As the prior art related to the waterproofing and repairing method of the polyurea, 30 to 54% by weight of a water-soluble polyurea resin, 15 to 20% by weight of an alkaline aqueous solution, and sieving in Korea Patent Registration 10-0976831 (Registration date August 12, 2010) Pigment 15-20 wt%, Pigment 3-10 wt%, Functional filler 10-20 wt%, UV stabilizer 1-2 wt%, Defoamer 1-2 wt%, Adhesion promoter 1-2 wt%, The water-soluble Polyurea resin is based on 100 parts by weight of water-soluble polyurea resin, 20 to 35 parts by weight of polyether amine, 5 to 15 parts by weight of amine terminated epoxy prepolymer (ATEP), 5 to 10 parts by weight of aliphatic isocyanate (aliphatic isocyanate) Part, DMBA (dimethylol butaionic acid) 0.5 to 2.0 parts by weight, chain extender 1 to 3 parts by weight, TEA (triethylamine) 0.5 to 1.5 parts by weight, water-soluble poly for protecting concrete structures, characterized in that composed of 40 to 68 parts by weight Urea resin coating compositions are known.

In addition, Korean Patent Application Publication No. 10-2018-0117002 (published October 26, 2018) discloses a polyurea composition for improving the structural performance of a concrete structure including polyurea and carbon nanotubes.

In addition, Korean Patent Registration No. 10-1926654 (Dec. 03, 2018) discloses at least one kind or two or more kinds of esters of aliphatic monocarboxylic acids having 12 to 24 carbon atoms and monools having 1 to 10 carbon atoms. An isocyanate group-terminated urethane prepolymer containing a plasticizer having a viscosity of 20 mPa · s or less and having an isocyanate group-containing compound reacted with a polyoxypropylene polyol and triylene isocyanate or 4,4'-diphenylmethane diisocyanate, and an aromatic polyamine This 4,4'- methylenebis (2-chloroaniline), bismethylthio toluene diamine and diethyl toluene diamine are selected from the group consisting of one or two or more thereof, and the plasticizer is contained in an amount of 1 to 30% by weight based on the total amount of the composition. With respect to 100 parts by weight of the main body including%, ester type urethane resins, hydraulic powders, aggregates, and mixed materials are essential components. The ester-type urethane resin is a water-soluble resin or an aqueous emulsion mainly composed of an ester- or polyester-type urethane resin component, is a self-emulsifying or forcible emulsion type, and the ester-type urethane resin has an average particle diameter of 20 μm. 10 parts by weight of an adjuvant consisting of 1 to 20% by weight of the ester-type urethane resin (solid content) / hydraulic powder ratio and 1 to 25% by weight of the ester-type urethane resin (solid content) / aggregate. Polyurea resin compositions are known which are characterized in that they are mixed.

In addition, Korean Patent Registration No. 10-1928330 (registration date December 06, 2018), in the defect repair method of a concrete building including an asphalt waterproof layer using polyurea, (1) the concrete base layer and the concrete base layer containing concrete Performing a joint cutting of the pressed concrete layer to release moisture formed on the waterproof layer on the waterproof layer including the asphalt sheet formed on the waterproof layer and the pressed concrete layer formed on the waterproof layer (s100) (2) the joint Cutting is cut to form a grid pattern, the step of installing a mosquito net sack on the joint cut surface (s110); (3) forming a debase at a point where the joint cut surface on which the mosquito net holder is installed crosses (s120); and (4) the mosquito net holder includes a support plate and a support, and is pressed against the upper surface of the mosquito net holder. Coating a primer on an upper layer of the concrete layer (s130); and (5) forming a urethane layer on the pressed concrete layer on which the primer is coated (s140); and (6) the following reaction scheme 1 on the urethane layer Polyurea can be formed by a reaction such as

Scheme 1

When the urea is sprayed, the reaction is carried out at a high temperature to increase the ambient temperature, the reaction proceeds at a temperature of 60-77 ℃ can be changed to water vapor by evaporating the water disposed on the asphalt waterproof layer Water is formed on the asphalt waterproof layer is discharged through the joint forming region through the mosquito net sack, discharged through the de-base (s150); And (7) adding a sunscreen on the polyurea layer (s160) is known for a repair method of a concrete building comprising an asphalt waterproof layer using a polyurea.

However, the conventional techniques related to the waterproofing and repairing method of the polyurea are merely to construct the waterproofing and anticorrosion method of the concrete by forming the protective film by constructing the polyurea resin composition on the concrete surface, and to be used as the seismic reinforcement and repairing material of the concrete structure. There was a problem that could not be.

On the other hand, earthquakes are the most dramatic of the natural disasters and the terrible phenomena that cause human and property damage. The history has been recorded along with the history of mankind. Has happened about 20 times.

Although such earthquakes occur mainly in earthquake zones in the Jijinbal region, seismologists generally believe that they can occur anywhere on the Earth's surface, although there is a difference in magnitude and frequency. There has been a lot of seismic activity historically, especially earthquakes involving many damages, such as the Pohang and Gyeongju earthquakes in 2018, and it is an important time to actively deal with earthquakes.

However, most domestic reinforced concrete structures. Underground structures, joint premises, water supply facilities, underground exterior walls, parking lots, railway structures, roadbeds, road pavements, etc., have many problems in seismic exposure because they do not reflect seismic design.

In order to solve the above problems, the earthquake resistance method of the concrete facility has been torn down all the structures made of reinforced concrete, and then seismic reinforcement work is performed by overlaying high-strength concrete to endure the earthquake on the frame. Although the situation is essentially made, the method of overlaying concrete cannot guarantee the stability due to the attachment problem between the new mortar and the aged concrete, and there is a problem in that the weight is increased.

In addition, as the vacuum method of concrete facilities, sheet method and shear reinforcement using mainly sheet-based fiber materials. Nonflammable FRP Reinforcement. Although it is largely divided into seismic methods using composite materials reinforcement and siliceous powder type seismic reinforcement materials, it is difficult to secure the seismic resistance according to the problems of new and structural defects of sheet-based method and adhesion of concrete structure to reinforcement materials. There was a difficult problem.

Korea Patent Registration 10-0976831 (Registration Date August 12, 2010) Korean Patent Publication No. 10-2018-0117002 (published 26 October 2018) Korea Patent Registration 10-1926654 (Registration date December 03, 2018) Korea Patent Registration 10-1928330 (Registration date December 06, 2018)

The present invention is to solve the above problems 1,6-hexane diisocyanate (HDI), isophorone diisocyanate (IPDI), methylene bis (p-cyclohexyl isocyanate) (H12 MDI), toluene diisocyanate (TDI) At least one polyisocyanate motif selected from naphthalene diisocyanate (NDI), methylenediphenyl diisocyanate (MDI), and toluene diisocyanate (TODI) and butanediol (BD), ethylenediamine (ED), methylenebischloroaniline ( Polyurea resin containing the hardening | curing agent containing MOCA), ethylene glycol (EG), hexanediol (HD); Acrylic polymer which emulsified-polymerized the monomer containing methyl methacrylate (MMA), 2-ethylhexyl acrylate (2-EH), acrylic acid (AAc), and 2-hydroxyethyl methacrylate (2-HEMA); Elastomers including ethylene vinyl acetate (EVA) and SBR latex; An inorganic reinforcing material comprising a silica gel powder generated during a silica gel manufacturing process and a waste artificial marble powder obtained by grinding waste artificial marble; Additives including quickeners, curing accelerators, and dispersants; At least one reinforcing fiber material selected from glass fiber, steel fiber, polyester fiber, nylon fiber, polypropylene (PP) fiber, cellulose fiber and carbon fiber; To provide a concrete structure waterproofing, anticorrosive, earthquake-resistant reinforcement polyurea repair composition and a concrete structure repair method using the same.

The present invention, 1,6-hexane diisocyanate (HDI), isophorone diisocyanate (IPDI), methylene bis (p-cyclohexyl isocyanate) (H12 MDI), toluene diisocyanate (TDI), One or more polyisocyanate motifs selected from naphthalene diisocyanate (NDI), methylenediphenyl diisocyanate (MDI), buttoluene diisocyanate (TODI), butanediol (BD), ethylenediamine (ED), methylenebischloroaniline (MOCA) Polyurea resin containing a curing agent comprising;), ethylene glycol (EG), hexanediol (HD); Acrylic polymer which emulsified-polymerized the monomer containing methyl methacrylate (MMA), 2-ethylhexyl acrylate (2-EH), acrylic acid (AAc), and 2-hydroxyethyl methacrylate (2-HEMA); Elastomers including ethylene vinyl acetate (EVA) and SBR latex; An inorganic reinforcing material comprising a silica gel powder generated during a silica gel manufacturing process and a waste artificial marble powder obtained by grinding waste artificial marble; Additives including quickeners, curing accelerators, and dispersants; At least one reinforcing fiber material selected from glass fiber, steel fiber, polyester fiber, nylon fiber, polypropylene (PP) fiber, cellulose fiber and carbon fiber; A suitable amount of water mixture; concrete structure comprising a waterproofing, anticorrosive, earthquake-resistant reinforcement polyurea repair composition is to solve the problem.

The silica gel powder is a solution of the problem is to dry the silica gel particles having a particle size of 20-500 kPa contained in the capture smoke generated in the closed space during the silica gel manufacturing process.

The waste artificial marble powder is pulverized waste artificial marble to fill the voids in the concrete, improve the water-tightness and waterproofness of the concrete to improve the long-term durability of the concrete, the powder is 5,000cm ² / g or more to solve the problem By means.

The concrete structure waterproofing, anticorrosion, earthquake-resistant reinforcement polyurea repair composition further comprises at least one selected from UV blockers, Hauyne (Hauyne) as a means of solving the problem.

The UV barrier agent is to improve the UV shielding and weather resistance of the concrete rooftop structure, it is to be added to less than 2% by weight of the total weight of the polyurea repair agent composition for waterproofing, anticorrosion, earthquake-resistant reinforcement of the concrete structure as a means of solving the problem.

Hauyne reinforces the roughness of concrete and finally forms ultra-fine micrometer-sized ettringite colloidal hydrate crystals through reaction with water molecules used as blending water to fill and harden micropores. In order to reduce the time shrinkage and drying shrinkage, it is to be used as a solution to the problem to be used in 0.5 ~ 1.0% by weight of the total weight of the polyurea repair agent composition for waterproofing, anticorrosion, seismic reinforcement of the concrete structure.

The quickener is to promote the rapid curing of the waterproof structure, anticorrosion, earthquake-resistant reinforcement polyurea repair composition, the solution of one or more selected from sodium carbonate (Na2CO3), sodium aluminate (NaAlO2), calcium hydroxide. By means.

The curing accelerator is to shorten the curing time of the polyurea repair agent composition for waterproofing, anticorrosion, and seismic reinforcement of the concrete structure, so that the work is completed early, DMA (dimethyl aniline), Co-octate (cobalt octate), DMPT At least one selected from (N, N-Dimethyl-p-toluidine) is a solution for the problem.

The dispersant is a lignin sulfonate, polynaphthalene sulfonate, poly melamine sulfonate, poly to increase the flow by dispersing the aggregated particles by causing mutual reaction of the water-resistant, anti-corrosion, seismic reinforcement polyurea repair composition of the concrete structure At least 1 sort (s) chosen from a carboxylate is made into the solution means of a subject.

In addition, the present invention, the step of removing the foreign matter by chipping, high pressure washing the water-resistant, anti-corrosion, earthquake-resistant reinforcement and repair of the concrete structure; Concrete structure repair comprising; reinforcing and repairing by spraying the polyurea repair agent composition for waterproofing, anticorrosion, and seismic reinforcement to the waterproof, anticorrosive, earthquake-resistant reinforcement and repair of the concrete structure is removed; The construction method is the solution to the problem.

The repairing composition for seismic reinforcement of concrete structures according to the present invention is 1,6-hexane diisocyanate (HDI), isophorone diisocyanate (IPDI), methylenebis (p-cyclohexyl isocyanate) (H12 MDI), toluene diisocyanate (TDI) ), At least one polyisocyanate selected from naphthalene diisocyanate (NDI), methylenediphenyl diisocyanate (MDI), and toluene diisocyanate (TODI), butanediol (BD), ethylenediamine (ED), methylenebischloroaniline Polyurea resin containing the hardening | curing agent containing (MOCA), ethylene glycol (EG), hexanediol (HD); Acrylic polymer which emulsified-polymerized the monomer containing methyl methacrylate (MMA), 2-ethylhexyl acrylate (2-EH), acrylic acid (AAc), and 2-hydroxyethyl methacrylate (2-HEMA); Elastomers including ethylene vinyl acetate (EVA) and SBR latex; An inorganic reinforcing material comprising a silica gel powder generated during a silica gel manufacturing process and a waste artificial marble powder obtained by grinding waste artificial marble; Additives including quickeners, curing accelerators, and dispersants; At least one reinforcing fiber material selected from glass fiber, steel fiber, polyester fiber, nylon fiber, polypropylene (PP) fiber, cellulose fiber and carbon fiber; Reinforcing the seismic performance of the concrete structure, including a suitable amount of water; including, the structure of the concrete structure, the waterproof reinforcing effect, the compressive strength reinforcement by the acrylic polymer, elasticity and tensile strength reinforcement by the elastomer and reinforcing fibers This is an excellent effect to repair.

The present invention, 1,6-hexane diisocyanate (HDI), isophorone diisocyanate (IPDI), methylene bis (p-cyclohexyl isocyanate) (H12 MDI), toluene diisocyanate (TDI), naphthalene diisocyanate (NDI) , At least one polyisocyanate selected from methylenediphenyl diisocyanate (MDI), butadiene diisocyanate (TODI) and butanediol (BD), ethylenediamine (ED), methylenebischloroaniline (MOCA), ethylene glycol (EG ), Polyurea resin comprising a curing agent comprising hexanediol (HD); Acrylic polymer which emulsified-polymerized the monomer containing methyl methacrylate (MMA), 2-ethylhexyl acrylate (2-EH), acrylic acid (AAc), and 2-hydroxyethyl methacrylate (2-HEMA); Elastomers including ethylene vinyl acetate (EVA) and SBR latex; An inorganic reinforcing material comprising a silica gel powder generated during a silica gel manufacturing process and a waste artificial marble powder obtained by grinding waste artificial marble; Additives including quickeners, curing accelerators, and dispersants; At least one reinforcing fiber material selected from glass fiber, steel fiber, polyester fiber, nylon fiber, polypropylene (PP) fiber, cellulose fiber and carbon fiber; It is characterized by a technical composition of a polyurea repair agent for waterproofing, anticorrosion, and seismic reinforcement for concrete structures, including a suitable amount of water.

The silica gel powder is characterized by drying the silica gel particles having a particle size of 20-500 kPa contained in the capture smoke generated in a closed space during the silica gel manufacturing process.

The waste artificial marble powder is pulverized waste artificial marble to fill the voids in the concrete, improve the water-tightness and waterproofness of the concrete to enhance the long-term durability of the concrete, the powder composition of more than 5,000cm ² / g It features.

The concrete structure waterproofing, anticorrosion, seismic reinforcement polyurea repair composition is characterized in that it further comprises at least one selected from UV blockers, Hauyne (Hauyne).

The UV blocking agent is to improve the UV blocking and weather resistance of the concrete rooftop structure, characterized in that the addition of less than 2% by weight of the total weight of the polyurea repair agent composition for waterproofing, anticorrosion, and seismic reinforcement of the concrete structure.

Hauyne reinforces the roughness of concrete and finally forms ultra-fine micrometer-sized ettringite colloidal hydrate crystals through reaction with water molecules used as blending water to fill and harden micropores. In order to reduce the shrinkage and drying shrinkage during the time, the concrete structure is characterized in that it is used in 0.5 to 1.0% by weight of the total weight of the waterproofing, anticorrosion, seismic reinforcement polyurea repair composition.

The fastener is for promoting the rapid curing of the waterproof structure, anticorrosion, seismic reinforcement polyurea repair composition, and at least one selected from sodium carbonate (Na2CO3), sodium aluminate (NaAlO2), calcium hydroxide of the technical configuration It features.

The curing accelerator is to shorten the curing time of the polyurea repair agent composition for waterproofing, anticorrosion, and seismic reinforcement of the concrete structure, so that the work is completed early, DMA (dimethyl aniline), Co-octate (cobalt octate), DMPT At least one selected from (N, N-Dimethyl-p-toluidine) is characterized by a technical configuration.

The dispersant is a lignin sulfonate, polynaphthalene sulfonate, poly melamine sulfonate, poly to increase the flow by dispersing the aggregated particles by causing mutual reaction of the water-resistant, anti-corrosion, seismic reinforcement polyurea repair composition of the concrete structure At least one selected from the carboxylates is characterized by a technical configuration.

In addition, the present invention, the step of removing the foreign matter by chipping, high pressure washing the water-resistant, anti-corrosion, earthquake-resistant reinforcement and repair of the concrete structure; Concrete structure repair comprising; reinforcing and repairing by spraying the polyurea repair agent composition for waterproofing, anticorrosion, and seismic reinforcement to the waterproof, anticorrosive, earthquake-resistant reinforcement and repair of the concrete structure is removed; The construction method is characterized by the technical configuration.

Hereinafter, the present invention will be described in detail with reference to embodiments of the present invention so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention.

First, the polyurea repair agent composition for waterproofing, anticorrosion, and seismic reinforcing concrete structures of the present invention is 1,6-hexane diisocyanate (HDI), isophorone diisocyanate (IPDI), methylenebis (p-cyclohexyl isocyanate) (H12 MDI ), At least one polyisocyanate selected from toluene diisocyanate (TDI), naphthalene diisocyanate (NDI), methylenediphenyl diisocyanate (MDI), and toluene diisocyanate (TODI), butanediol (BD), ethylenediamine ( Polyurea resin containing hardening | curing agent containing ED), methylenebischloroaniline (MOCA), ethylene glycol (EG), hexanediol (HD); Acrylic polymer which emulsified-polymerized the monomer containing methyl methacrylate (MMA), 2-ethylhexyl acrylate (2-EH), acrylic acid (AAc), and 2-hydroxyethyl methacrylate (2-HEMA); Elastomers including ethylene vinyl acetate (EVA) and SBR latex; An inorganic reinforcing material comprising a silica gel powder generated during a silica gel manufacturing process and a waste artificial marble powder obtained by grinding waste artificial marble; Additives including quickeners, curing accelerators, and dispersants; At least one reinforcing fiber material selected from glass fiber, steel fiber, polyester fiber, nylon fiber, polypropylene (PP) fiber, cellulose fiber and carbon fiber; A proper amount of compounding water; is configured to include.

Here, the polyurea resin is a resin having excellent chemical properties such as water resistance, chemical resistance, and salt water resistance, and mechanical properties such as abrasion resistance and impact resistance, and is a resin produced by the reaction of a polyisocyanate-based and an amine curing agent. In the present invention, as the polyisocyanate, 1,6-hexane diisocyanate (HDI), isophorone diisocyanate (IPDI), methylenebis (p-cyclohexyl isocyanate) (H12 MDI), toluene diisocyanate (TDI), naphthalene diisocyanate (NDI), methylenediphenyl diisocyanate (MDI), at least one main material selected from bit toluene diisocyanate (TODI) and butanediol (BD), ethylenediamine (ED), methylenebischloroaniline (MOCA), ethylene glycol ( EG) and a polyurea resin produced by the reaction of a curing agent comprising hexanediol (HD).

In particular, the polyurea resin has excellent physical properties such as abrasion resistance, toughness and tensile strength, elongation rate, etc. of the coating film when used as a coating material for concrete structures, and gives flexibility, and is excellent in cracks due to cracking, shrinkage, and expansion of the underlying surface. It is characterized by its excellent adhesion and waterproofness with concrete.

On the other hand, in the present invention, in addition to the coating properties of the polyurea resin for the seismic performance and strength enhancement, methyl methacrylate (MMA), 2-ethylhexyl acrylate (2-EH), acrylic acid (AAc), 2- It is a characteristic technical composition to mix and use the acrylic polymer which emulsified-polymerized the monomer containing hydroxyethyl methacrylic acid (2-HEMA), and the elastomer containing ethylene vinyl acetate (EVA) and SBR latex.

Methyl methacrylate (MMA) resin used in the acrylic polymer is a colorless transparent liquid, and methacrylate is prepared by oxidizing tert-butyl alcohol (TBA) prepared using C4 oil as a raw material in a gaseous state. After the preparation, it is produced by esterification with methanol, that is, a reactive resin made to have a double carbon bond through a polymerization reaction of acrylic acid and methacrylic acid ester, and CH ₂ = C (CH ₃ ) CO ₂ CH ₃ Has the formula

Such methyl methacrylate (MMA) resin is a hard type and flexible, and durable due to the increase in the ratio of the syndiotactic structure in which the polymer chain structure shows continuous regularity when radically polymerized at low temperature. It has excellent physical properties such as heat resistance, chemical resistance, abrasion resistance, and UV safety. It also has excellent weather resistance, which is resistant to weather and climate such as sunlight, and suppresses corrosion due to external environmental changes (weather and climate change), By incorporating and integrating to improve adhesion strength and toughness, good colorability due to pigments, etc., and high thermal expansion coefficient, but because of high stability of resin, it is used in many fields because of its excellent transparency, weather resistance and colorability.

However, MMA resin starts curing when a small amount of curing agent is added in about 2 to 5% of the amount of resin, and it is a super fast curing resin which is completely cured within 1 hour after the start of curing. It is excellent in properties and can be laid and finished in a large area. When the MMA resin is used as a coating material composition, its strength is excellent after curing, but it is insufficient in cracking resistance and warpage following, as well as thermal expansion with the substrate. Due to the different characteristics, there is a problem that cracks are likely to occur when used outdoors rather than indoors.

In order to supplement the MMA disadvantage, methyl methacrylate (MMA) is mixed with 2-ethylhexyl acrylate (2-EHA), acrylic acid (AAc), and 2-hydroxyethyl methacrylate (2-HEMA). Acryl polymer that can compensate for the disadvantages of the physical properties of methyl methacrylate (MMA) can be obtained, that is, the 2-ethylhexyl acrylate (2-EHA), acrylic acid (AAc), 2-hydroxyethyl methacrylate (2 -HEMA) can strengthen the crack resistance and compressive strength of methyl methacrylate (MMA) due to its soft property after curing.

In addition, EVA (ethylene vinyl acetate) and SBR latex used in the elastomer is to strengthen the adhesion to the concrete structure, to reinforce the elasticity and tensile strength of the coating film of the concrete structure waterproof, anticorrosion, seismic resistance of the present invention To improve the seismic performance of the reinforcing polyurea repair composition.

On the other hand, in the present invention, as an inorganic reinforcing material, the silica gel powder dried silica gel particles having a particle size of 20-500Å contained in the capture smoke generated in a closed space during the silica gel manufacturing process, the silica gel powder is water Used to prevent dry shrinkage that occurs after drying.

In addition, waste inorganic marble powder, which has been pulverized waste artificial marble, is used as inorganic reinforcing material. Waste artificial marble powder is used to fill the voids in concrete and to improve the water-tightness and waterproofness of concrete to enhance the long-term durability of concrete. It is preferable to use a powder of 5,000 cm ² / g or more.

In addition, the present invention uses at least one reinforcing fiber material selected from glass fiber, steel fiber, polyester fiber, nylon fiber, polypropylene (PP) fiber, cellulose fiber and carbon fiber, the reinforcing fiber material is a concrete structure of the present invention It is used for seismic reinforcement such as crack prevention by improving the tensile strength of the waterproofing, anticorrosion, and seismic reinforcing polyurea repair agent composition.

In addition, the concrete structure waterproofing, anticorrosion, earthquake-resistant reinforcing polyurea repair composition may further comprise at least one selected from UV screening agents, howin.

In this case, the UV blocking agent is to improve the UV blocking and weather resistance of the concrete rooftop structure, it is preferable to add less than 2% by weight of the total weight of the repair composition for seismic reinforcement of the concrete structure, the Howin (Hauyne) to the earth Minerals composed of silicon, sodium, aluminum, and chlorine, which are relatively common elements, which reinforce the roughness of concrete and react with water molecules used as compound water to finally form ultrafine micrometer-sized ettringite colloidal hydrate In order to reduce the shrinkage and dry shrinkage during the filling and curing of micropores by forming crystals, it is preferable to use 0.5 to 1.0% by weight of the total weight of the polyurea repair agent composition for waterproofing, anticorrosion, and seismic reinforcement of the concrete structure.

In addition, the quickener is for promoting the rapid curing of the waterproof structure, anticorrosion, seismic reinforcement polyurea repair composition, preferably at least one selected from sodium carbonate (Na2CO3), sodium aluminate (NaAlO2), calcium hydroxide. Do.

In addition, the curing accelerator is to shorten the curing time of the polyurea repair agent composition for waterproofing, anticorrosion, and seismic reinforcement of the concrete structure, so that the work is completed early, DMA (dimethyl aniline), Co-octate (cobaltate) , DMPT (N, N-Dimethyl-p-toluidine) is preferably one or more selected from the above, the dispersing agent is caused by the mutual reaction of the particles of the polyurea repair agent composition for waterproofing, anticorrosion, earthquake-resistant reinforcement of the concrete structure to aggregate the particles It is preferable that it is at least one selected from lignin sulfonate, polynaphthalene sulfonate, polymelamine sulfonate, polycarboxylate to disperse and increase the flow rate.

On the other hand, the concrete structure repair method of the present invention is to remove the foreign matter by chipping, high-pressure washing the surface of the concrete structure waterproof, anticorrosion, earthquake reinforcement and repair; And spraying and spraying the polyurea repair agent composition for waterproofing, anticorrosion, and seismic reinforcement to the concrete structure waterproofing, anticorrosion, and earthquake-resistant reinforcement to remove the foreign matter.

[Preparation of polyurea repair composition for waterproofing, anticorrosion, and seismic reinforcement of concrete structure of the present invention]

To 5 kg of polyurea resin reacted with a curing agent containing isophorone diisocyanate (IPDI), butanediol (BD), ethylenediamine (ED), methylenebischloroaniline (MOCA), ethylene glycol (EG) and hexanediol (HD) 2 kg of an acrylic polymer obtained by emulsion-polymerizing a monomer comprising methyl methacrylate (MMA), 2-ethylhexyl acrylate (2-EH), acrylic acid (AAc), and 2-hydroxyethyl methacrylic acid (2-HEMA); ; 1 kg of an elastomer comprising 0.5 kg of ethylene vinyl acetate (EVA) and 0.5 kg of SBR latex is mixed and comprises silica gel powder generated during the silica gel manufacturing process, and waste artificial marble powder obtained by pulverizing waste artificial marble. 3kg inorganic stiffener, 0.5kg polypropylene (PP) fiber, sodium carbonate (Na2CO3) as a fastener, DMA (dimethyl aniline) as a curing accelerator, and ligninsulfonate as a dispersant, mixed with an appropriate amount of water to waterproof, anticorrosive, and seismic A reinforcing polyurea repair composition was prepared.

Comparative Example 1

[Manufacture of conventional seismic reinforcement mortar]

100 parts by weight of Portland cement, 5 parts by weight of polyvinylacetate polymer, 5.0 parts by weight of silica fume, 1.0 part by weight of a mixture of glass and steel fibers, 5 parts by weight of a nitrate salt strength enhancer, an average diameter of about 100 μm and a dry specific gravity of 0.9 Phosphorus porous filament 45 parts by weight, neopentyl glycol shrinkage inhibitor 1.0 parts by weight, polyvinyl alcohol powder resin 5.0 parts by weight, antifoaming agent 0.3 parts by weight, calcium sulfoaluminate (CSA) and gypsum mixed in a ratio of 6: 4 Eight parts by weight of the expanding agent, 2.5 parts by weight of n-octyltriethoxy silane powdered silicone waterproofing agent were mixed to obtain a mixture. Subsequently, a first composition comprising 35 parts by weight of a cured presenter and 2 parts by weight of montmorillonite clay mineral, 1.5 parts by weight of aluminum salt and 61.5 parts by weight of water, 6 parts by weight of curing accelerator, 15 parts by weight of clay mineral, and stabilizer A second composition comprising 0.5 parts by weight and 65 parts by weight of water was obtained, followed by mixing each of them in a weight ratio of 7: 3 to obtain a composition, which was uniformly mixed with an appropriate amount of water at about 10 parts by weight to the obtained mixture as a seismic performance enhancer. To prepare a polymer mortar composition for seismic reinforcement.

[Performance evaluation]

Test specimens were prepared using the compositions prepared in [Example 1] and [Comparative Example 1], and the physical properties were measured by the following test methods, and the results are shown in [Table 1].

1) Flexural strength: KS F 2476 strength test method of polymer cement mortar

2) Compressive strength: KS F 2405 Test method for compressive strength of concrete

3) Bonding Strength: KS F 4716 Method of Testing Strength of Polymer Cement Mortars ”

4) Length change rate: Test method of length change of KS F 2424 mortar and concrete

Item Example 1 Comparative Example 1 Flexural strength (N / mm ² ) 7 days 102.2 8.8 28 days 12.8 10.4 Compressive strength (N / mm ² ) 1 day 15.5 12.3 3 days 28.4 24.2 7 days 36.7 32.5 28 days 48.8 45.4 Adhesion Strength (N / mm ² ) Standard condition 3.7 2.9 After hot and cold repeat 3.0 2.8 Length change rate (%) 3 days 0.04 0.012 7 days 0.012 0.004 14 days 0.012 -0.02 28 days 0.008 -0.025

As shown in [Table 1], the composition of [Example 1] of the present invention is very excellent in bending strength, compressive strength, and adhesive strength than [Comparative Example 1], so that the composition of the present invention is waterproof in concrete structures. It can be seen that it can be excellently used for reinforcing, anticorrosion, and earthquake resistance.

However, the present invention showed a slight difference in the rate of change of length, but this is presumed to be due to the organic binder content of the composition of the present invention is higher than that of {Comparative Example 1].

The above description is merely illustrative of the technical idea of the present invention, and those skilled in the art to which the present invention pertains may make various modifications and changes without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

Claims (10)

1,6-hexane diisocyanate (HDI), isophorone diisocyanate (IPDI), methylenebis (p-cyclohexyl isocyanate) (H12 MDI), toluene diisocyanate (TDI), naphthalene diisocyanate (NDI), methylene diphenyl One or more types of polyisocyanate selected from diisocyanate (MDI), bittoluene diisocyanate (TODI) and butanediol (BD), ethylenediamine (ED), methylenebischloroaniline (MOCA), ethylene glycol (EG), hexanediol Polyurea resin containing the hardening | curing agent containing (HD); Acrylic polymer which emulsified-polymerized the monomer containing methyl methacrylate (MMA), 2-ethylhexyl acrylate (2-EH), acrylic acid (AAc), and 2-hydroxyethyl methacrylate (2-HEMA); Elastomers including ethylene vinyl acetate (EVA) and SBR latex; Silica gel powder with particle size of 20-500Å, which is contained in the capture smoke generated in the enclosed space during the silica gel manufacturing process, is made by pulverizing dried artificial gel and waste artificial marble to fill voids in the concrete. Inorganic reinforcement material comprising waste artificial marble powder having a powder degree of 5,000 cm ² / g or more to improve the water-tightness and waterproof properties and to improve the long-term durability of the concrete; Additives including quickeners, curing accelerators, and dispersants; At least one reinforcing fiber material selected from glass fiber, steel fiber, polyester fiber, nylon fiber, polypropylene (PP) fiber, cellulose fiber and carbon fiber; Polyurea repair agent composition for waterproofing, anticorrosion, seismic reinforcement for concrete structures, comprising a suitable amount of water;
delete delete The method of claim 1,
The concrete structure waterproof, anticorrosion, earthquake-resistant reinforcement polyurea repair composition is a waterproof, anticorrosive, earthquake-resistant reinforcement polyurea repair composition, characterized in that it further comprises at least one selected from the HA.
The method of claim 4, wherein
The UV barrier agent is to improve the UV protection and weather resistance of the concrete roof structure, waterproof, anticorrosive, concrete structure, characterized in that added to less than 2% by weight of the total weight of the polyurea repair agent composition for earthquake reinforcement. , Polyurea repair agent composition for seismic reinforcement
The method of claim 4, wherein
Hauyne reinforces the roughness of concrete and finally forms ultra-fine micrometer-sized ettringite colloidal hydrate crystals through reaction with water molecules used as blending water to fill and harden micropores. In order to reduce the shrinkage and drying shrinkage during construction, waterproofing, anticorrosion, seismic reinforcement polyurea concrete structure, characterized in that used in 0.5 ~ 1.0% by weight of the total weight of the polyurea repair agent composition Urea repair agent composition
The method of claim 1,
The fastener is for promoting the rapid curing of the waterproof structure, anticorrosion, seismic reinforcement polyurea repair composition, characterized in that at least one selected from sodium carbonate (Na2CO3), sodium aluminate (NaAlO2), calcium hydroxide. Polyurea repair agent composition for waterproofing, anticorrosion, and seismic reinforcement of the concrete structure
The method of claim 1,
The curing accelerator is to shorten the curing time of the polyurea repair agent composition for waterproofing, anticorrosion, and seismic reinforcement of the concrete structure, so that the work is completed early, DMA (dimethyl aniline), Co-octate (cobalt octate), DMPT (N, N-Dimethyl-p-toluidine) polyurea repair composition for waterproofing, anticorrosion, seismic reinforcement of the concrete structure, characterized in that at least one selected from
The method of claim 1,
The dispersant is a lignin sulfonate, polynaphthalene sulfonate, poly melamine sulfonate, poly to increase the flow by dispersing the aggregated particles by causing mutual reaction of the water-resistant, anti-corrosion, seismic reinforcement polyurea repair composition of the concrete structure Polyurea repair agent composition for waterproofing, anticorrosion, seismic reinforcement of the concrete structure, characterized in that at least one selected from carboxylates.
Chipping and high pressure washing the site to be waterproof, anticorrosive, seismic reinforcement and maintenance of the concrete structure to remove foreign matter; Spray the polyurea repair agent composition for waterproofing, anticorrosion, and seismic reinforcement according to any one of claims 1 and 4 to 9 to the concrete structure waterproofing, anticorrosion, earthquake-resistant reinforcement and repair target site from which the foreign matter is removed. Reinforcing and repairing by spraying; Concrete structure repair method comprising the