KR101745501B1 - Repair and reinforcement for concrete structures - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a repair reinforcement material of a concrete structure in which a molten vitrification powder and a cell rock are mixed together for finishing or repairing a surface of a concrete structure such as a building, an underground structure, a shoulder bridge structure, After drying, it does not release any toxic substances and odor, does not cause lifting phenomenon and cracks, suppresses radiation of harmful components such as formaldehyde, has excellent water resistance, and has excellent heat resistance. And to a repair reinforcement material of a concrete structure in which a molten vitrification powder and a cell rock are mixed in which physical properties such as heat insulation, water resistance, flame retardancy, chemical resistance, weather resistance and antifouling property are improved.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a repair reinforcement material of a concrete structure in which a molten vitrification powder and a cell rock are mixed together for finishing or repairing a surface of a concrete structure such as a building, an underground structure, a shoulder bridge structure, After drying, it does not release any toxic substances and odor, does not cause lifting phenomenon and cracks, suppresses radiation of harmful components such as formaldehyde, has excellent water resistance, and has excellent heat resistance. And to a repair reinforcement material of a concrete structure in which a molten vitrification powder and a cell rock are mixed in which physical properties such as heat insulation, water resistance, flame retardancy, chemical resistance, weather resistance and antifouling property are improved.

Conventional methods of finishing the surface of a concrete structure include a method in which after the construction of the concrete using the concrete, the finishing material such as the functional paint, the paint or the wood is re-applied or the concrete structure such as the underground structure, the shoulder bridge structure or the bridge is exposed A variety of techniques have been sought for imparting functionalities such as heat insulation, water resistance, heat resistance, flame retardancy, chemical resistance, weather resistance or antifouling property to the surface of a concrete structure that has been applied in the form of a concrete.

In addition, due to the development of chemical engineering, paint compositions are gradually being replaced by environmentally friendly substances. The water-based paint applied on the inner wall of the residential space of the building simply forms a coating on the wall of the cement so as to give an aesthetic effect. In recent years, water-soluble paints having functions such as heat insulation, water resistance, heat resistance, flame retardancy, chemical resistance and weather resistance have been demanded in addition to basic performance in consideration of improvement in quality of life, stability of housing culture,

Korean Patent Registration No. 10-0610457 discloses a composition for waterborne paints having excellent stain resistance and elasticity, and Korean Patent Laid-Open No. 1999-014598 discloses a waterborne coating composition for heat insulation of crack-following buildings have.

However, these paints do not exhibit excellent waterproofing performance and durability.

In addition, although various permeable coating and waterproofing agents are currently on the market, many problems are exposed in their effects and durability. In other words, permeable coating waterproofing agents such as polystyrene, polyvinyl chloride and water-soluble vinyl chloride and vinylidene chloride emulsion, which are the main solvent types, give an unnatural gloss to the building when they are applied on the outer wall or roof, It is easily aged due to the influence of weathering, shortening the life span and weathering easily and losing its performance.

On the other hand, the oil-based paints contain a large amount of aromatic solvents such as benzene, toluene and xylenes, which contain toxic substances such as VOC and lead, heavy metals, benzene, toluene and xylene, which are harmful to the human body. Not only does it comply with air quality regulations, it also causes paint wall swelling and discoloration. For example, Aqua Seal (product name), a penetration-resistant coating waterproofing agent, and Liquid Plastics (trade name), a product of Britain Elp and Ais Co., Ltd., which are products of silicone resin, manufactured by Nippon Steel Chemical Co., Ltd., cause swelling and discoloration of the wall when sprayed on paint walls due to the use of petroleum- Bring it.

In addition, the emulsion-type permeable coating water repellent agent using paraffin wax as raw material has a low production cost, but it is known that the yellowing effect of the emulsifier is caused by the emulsifier and the abrasion resistance is low and the effect is not maintained for a long time.

In addition, the water-based paint contains ammonia and formaldehyde. In the case of field workability, the coating composition is poorly adherent, so that the raw liquid flows down before penetration and drying to the mother body. Thus, properties such as heat insulation, waterproofness, heat resistance, flame retardancy, chemical resistance and weather resistance It has a disadvantage in that there are many weaknesses in the protection of the life of the building and the application of the repair.

In addition, fluorine compound-based paints have excellent performance in various aspects, but they are far more expensive than other products.

In recent years, as the quality of life has improved, the stability of the residential culture and the importance of health have been emphasized. Therefore, a technology that can solve indoor air pollution by harmful volatile organic compounds (VOC) is needed. Conventional waterproofing agents are designed and produced as oil-based paints to satisfy basic performance, but they lack the environmentally friendly performance because they do not have enough regulations for volatile organic compounds (VOC) that cause sick house syndrome.

The epoxy resin and urethane resin are excellent in flexibility, stretchability, dustproofness and stain resistance, and can be used in a variety of applications, such as epoxy resin, urethane resin, and vinyl resin. Has excellent workability and fast drying property, has excellent initial adhesion strength, is excellent in water resistance, and can be used in a large amount of various fillers.

However, most epoxy and urethane flooring products contain volatile organic compounds, and there are fatal adverse effects on the human body such as risk of worker's environment at construction, long-term risk exposure of constructors and users due to continuous volatilization of residual solvent after construction In addition, it is very vulnerable to fire after work due to volatile solvents and fire after construction, and there is a problem of fire that can cause a large accident due to a large amount of poisonous gas generated in case of fire.

Particularly, epoxy flooring has a large amount of bisphenol A and volatile environmental harmful compounds (VOCs 44mg / kg) and a large amount of lead (70mg / kg) which is a heavy metal and has a serious effect on human body (breast cancer, erectile dysfunction, testicular cancer (VOCs) are more than 11 times the standard value (4mg / kg). These compounds cause toxic gas emission at the topic, causing many people to suffer damage. The use of organic flooring is regulated.

The epoxy and urethane floors have excellent water resistance on the surface but are likely to be weakly peeled off under water pressure and have a problem with long-term adhesive force due to water content and expansion / contraction ratio, and are simple in artificial color and design, And there is a problem that the image must be constructed at a temperature of 5 degrees or higher.

That is, the epoxy and urethane based flooring is insufficient in resistance due to the concrete surface behavior as shown in the following figure and maintains only the state of adhesion to the concrete floor due to the adhesive property of the flooring itself. As time passes, It is difficult to adapt to the heat change due to rupture, peeling and drop-off phenomenon with the bottom surface. In places where high temperature and water are used, As a result, there is a risk that the flash point is diffused when a fire occurs, and there is no air permeability, and the secondary deterioration phenomenon is accelerated by the difference in elastic modulus.

As a material for solving environmental and physical problems of the epoxy and urethane flooring and preventing the generation of dust on the parking lot floor, a cement-based color hardner is used in which a pigment for imparting color to the cement component and a certain additive are added , It is advantageous in that the cost is low and the air can be shortened by the batch construction. However, since there is no surface smoothness and water penetration is easy, and after a certain period after the application, There is a problem that whitening phenomenon occurs, and continuous research and development is required to solve this problem.

Thus, the "repair and reinforcement of concrete structure" of Patent No. 10-1180060 has been disclosed. However, the above-mentioned structure is not perfect to reinforce lifting phenomenon and crack after construction, and also to reduce consumption of fly ash and flooring The second environmental pollution can not be prevented.

1. Domestic Registration No. 10-1180060 2. Domestic Registration No. 10-0610457 3. Korean Patent Publication No. 1999-014598

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide a concrete reinforcing steel reinforced with concrete which contains volatile organic compounds (VOC) harmful to human bodies, or which is excellent in heat insulation, water resistance, heat resistance, flame retardancy, It is a main object of the present invention to provide a solution point to the problem that the physical properties are insufficient.

In addition, the present invention provides a cosmetic composition which is quick in drying, free from any harmful substances emitted or odor after operation, and does not cause lifting phenomenon or cracking, and can provide a beautiful appearance and inhibits the radiation of harmful components such as formaldehyde And has excellent water resistance and excellent heat resistance, so as to promote flame retarding function.

In addition to this, it is aimed to protect the surface of concrete by using molten vitrification powder and to prevent neutralization etc. in order to prevent shortening of life due to aging of aged concrete.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

The repair and reinforcement material of the concrete structure according to the present invention comprises 60 to 80 parts by weight of cement, 20 to 50 parts by weight of an acrylic copolymer resin, 0.5 to 3 parts by weight of silica airgel, and polyether ether ketone 1 to 10 parts by weight of a polyether ether ketone copolymer resin; A mixture A comprising 0.1 to 5 parts by weight of carbon nanotubes (CNT) having an average diameter of 50 to 100 nm, 0.5 to 3 parts by weight of a dispersant, and 0.3 to 1 part by weight of a defoaming agent;

10 to 30 parts by weight of aromatic polyamide fibers, 10 to 30 parts by weight of molten vitrification powder, 20 to 30 parts by weight of celluloses and 10 to 30 parts by weight of a resin curing agent, based on 100 parts by weight of water,

And a mixture C comprising 50 parts by weight of the mixture A and 50 parts by weight of the mixture B is constituted.

Further, the present invention is characterized in that the aromatic polyamide fiber is an aramid fiber.

In addition, the molten glass powder is characterized in that the wastewater is uniformly mixed in the ratio of 7: 3 wt% to the bottom ash obtained from the municipal waste incinerator and the fly ash.

The present invention is characterized in that the molten vitrification powder is obtained by raising the temperature to 10 ° C per minute to 1,400 ° C, holding it for 1 hour, and then quenching at 600 ° C or lower.

A method of constructing a concrete structure according to the present invention includes: a pretreatment step of washing and cleaning the surface of a cracked concrete structure;

A priming step of applying a primer for priming to the surface of the concrete structure treated with the preprocessing step;

60 to 80 parts by weight of cement, 20 to 50 parts by weight of an acrylic copolymer resin, 0.5 to 3 parts by weight of silica airgel, 100 parts by weight of a polyether ether ketone ( 1 to 10 parts by weight of a polyether ether ketone copolymer resin, 0.1 to 5 parts by weight of a carbon nanotube (CNT) having an average diameter of 50 to 100 nm and an average length of 1 to 30 占 퐉, 0.5 to 3 parts by weight of a dispersant, And 0.3 to 1 part by weight of a mixture A or a mixture C is applied to the mixture.

10 to 30 parts by weight of an aromatic polyamide fiber, 10 to 30 parts by weight of a molten vitrified powder, 20 to 30 parts by weight of a cellar, 10 to 30 parts by weight of a resin curing agent, 0.1 to 3 parts by weight of a mixture B, and 50 parts by weight of a mixture B of 50 parts by weight.

According to the present invention having the above-described characteristics, it is possible to prevent the dust from being blown, to prevent the dust from being blown and to prevent the release of any harmful substances, There is no effect.

In addition, there is also an effect that no lift-off phenomenon or cracking occurs on the concrete surface after repair work.

In addition, it can suppress the radiation of harmful components such as formaldehyde, has excellent water resistance, and is excellent in heat resistance, so that a flame retardant function is added.

In addition, the present invention can be used not only in reinforcing strength but also in promoting recycling by mixing recycled glass obtained by blending wastewater generated in a glass factory with fly ash and floor material incinerated with polyamide fibers and general municipal waste, There is also an effect of preventing secondary pollution.

In addition, a glassy coating layer is formed on the concrete surface to improve the high absorption rate, and at the same time, the heat insulating property and the physical performance are excellent.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a process chart showing a process of molten vitrification powder of an ash sample. FIG.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail with reference to the accompanying drawings. It should be understood, however, that the appended drawings illustrate only the contents and scope of technology of the present invention, and the technical scope of the present invention is not limited thereto. Also. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the technical idea of the present invention based on these examples.

The present invention relates to a repairing and reinforcing material for a concrete structure used for finishing or repairing a surface of a concrete structure such as a building, an underground structure, a shoulder bridge structure or a pier, To a repairing reinforcement of a concrete structure having a function such as antifouling property by dissipation.

The repair and reinforcement material of the concrete structure according to the present invention comprises 60 to 80 parts by weight of cement, 20 to 50 parts by weight of an acrylic copolymer resin, 0.5 to 3 parts by weight of silica airgel, 1 to 10 parts by weight of a polyether ether ketone copolymer resin, 0.1 to 5 parts by weight of a carbon nanotube (CNT) having an average diameter of 50 to 100 nm and an average length of 1 to 30 占 퐉, 0.5 to 3 parts by weight of a dispersant, 0.3 to 1 part by weight of a mixture A,

10 to 30 parts by weight of an aromatic polyamide fiber, 10 to 30 parts by weight of a molten glass powder, 20 to 30 parts by weight of a cellar, 10 to 30 parts by weight of a resin curing agent, and 0.1 to 3 parts by weight of a fluidizing agent, In the same ratio.

Specifically, the cement can be a general portland cement made of lime (CaO), silica (SiO 2), alumina (Al 2 O 3) and iron oxide (Fe 2 O 3), and microcement having a smaller particle size than ordinary cement can be used, Among these components, alumina cement further containing an alumina component may be used. In this case, when alumina cement is used, a material containing a predetermined amount of gypsum may be used for the purpose of correcting the strength due to the expansion of the alumina cement.

In this case, the cement is preferably contained in a composition ratio of 60 to 80 parts by weight with respect to 100 parts by weight of water included in the present invention. If the cement is contained in an amount of less than 60 parts by weight, the composition ratio of the cement is insufficient, The adhesive strength and the strength of the repair reinforcement according to the present invention can not be stably adhered to the surface of the concrete structure. On the other hand, when the amount exceeds 80 parts by weight, the adhesive strength and strength are excellent, .

In addition, the acrylic copolymer resin is a constitution for increasing the adhesive force of the repair reinforcement along with the cement so that the repair reinforcement of the concrete structure according to the present invention has a predetermined elastic force.

That is, if the adhesive force to the surface of the concrete structure is provided only by the cement, the elasticity of the hardened repairing reinforcement applied to the surface of the concrete structure may be insufficient, causing cracks in the repairing reinforcement due to shrinkage of the repairing reinforcement or vibration of the concrete structure , The acrylic copolymer resin realizes an effect of providing a predetermined elastic force to the repair reinforcing material and providing water repellency to the repair reinforcing material through the characteristics of the polymer resin and generally provides an adhesive force to the base adjusting material including the acrylic copolymer resin Can be increased as the same composition.

In the present invention, it is preferable to use an aqueous acrylic copolymer resin or a silicone-modified acrylic copolymer emulsion resin obtained by copolymerizing an ethylenic unsaturated group, an alkoxy or hydroxy group-containing silane compound.

If the acrylic copolymer resin is contained in the repair reinforcement of the concrete structure in an amount of less than 20 parts by weight based on 100 parts by weight of water, not only the elasticity of the repair reinforcement by the acrylic copolymer resin is insufficient, It is preferable that the amount of the reinforcing material is more than 20 parts by weight because the adhesion to the surface (base adjusting material) is lowered. If the amount exceeds 50 parts by weight, the viscosity of the repair reinforcing material increases, And 20 to 50 parts by weight based on 100 parts by weight of the reinforcing steel.

The airgel is a supersaturated material prepared by allowing the gel to maintain the nano-pore structure by drying the wet gel synthesized by the sol-gel reaction without any shrinkage under a supercritical condition in which there is no gas-liquid interface or by other methods , And has excellent heat insulating properties.

In addition, the present invention can impart the heat insulating property of the silica airgel to the repair reinforcement according to the present invention by including the silica airgel made of silicone having excellent economical efficiency into the aerated reinforcement.

In connection with the above, it is preferable that silica aerogels manufactured by various methods are all available and are included in the repair reinforcement at a composition ratio of 0.5 to 3 parts by weight with respect to 100 parts by weight of water.

If silica aerogels are included in the repair reinforcing material at less than 0.5 part by weight, the heat insulating property by the repair reinforcing material tends to be insignificant. If the amount exceeds 3 parts by weight, the heat insulating property is excellent. However, , It is preferable to have a composition ratio in the above range.

The polyether ether ketone copolymer resin is a linear aromatic polymer in which the structure is repeatedly formed or a copolymer resin having the above structure as a basic structure and has a melting point of about 343 DEG C, The reinforcing steel of the present invention has a heat resistance that can withstand the fire.

That is, when the repair reinforcing material of the concrete structure includes an organic-based composition such as an acrylic copolymer resin, the heat-resistant property may be deteriorated due to the organic composition which is vulnerable to heat. In the polyether ether ketone according to the present invention, The copolymer resin exerts the effect of solving the above problems.

In connection with the above, the polyetheretherketone copolymer resin has an excellent flame retardancy because the melting point of the polyetheretherketone copolymer resin is higher than that of a general synthetic resin as described above, so that the repair reinforcement material of the concrete structure according to the present invention does not contain any additional flame retardant And exhibits an effect of improving the chemical resistance of the repair reinforcement material of the concrete structure due to the characteristics of the aromatic polymer.

The polyetheretherketone copolymer resin is preferably included in the repair reinforcement of the concrete structure in a composition ratio of 1 to 10 parts by weight based on 100 parts by weight of water. At this time, if the polyetheretherketone copolymer resin is contained in an amount of less than 1 part by weight, the composition ratio is insignificant, and the improvement in physical properties such as heat resistance, flame retardancy, and chemical resistance of the repairing reinforcement of the concrete structure by the polyetheretherketone copolymer resin becomes somewhat insufficient However, if the amount exceeds 10 parts by weight, there arises a problem that the adhesive strength of the repair reinforcing material of the concrete structure is lowered by the acrylic copolymer resin, so that it is preferable that the composition ratio is in the above range.

In addition, the polyetheretherketone copolymer resin included in the repair reinforcement of the concrete structure of the present invention can be used either in a liquid state or in a solid state (powder state). At this time, the solid polyetheretherketone copolymer resin preferably has an average particle size of 100 to 600 nm in order to induce smooth mixing with other compositions contained in the repair reinforcement material of the concrete structure.

At this time, if the average particle size of the polyetheretherketone copolymer resin is less than 100 nm, the particle size of the polyetheretherketone copolymer resin is excessively small, and it is easy to disperse the water as a solvent and cement and acrylic copolymer resin as the main adhesive composition And when the average particle size exceeds 600 nm, the particle size is excessively large, so that a foreign body feeling for other composition of the repair reinforcement material of the concrete structure is generated, and at the same time, the concrete structure of the repair reinforcement material of the finished concrete structure It is preferable to use those having an average particle size within the above-mentioned range.

In addition, the present invention can be configured such that the repair reinforcement material of the concrete structure having the above-described structure further comprises 0.5 to 5 parts by weight of a polyfluoroethylene-based copolymer resin per 100 parts by weight of water.

Specifically, the polyfluoroethylene-based copolymer resin is a copolymer resin containing a composition commonly known as " Teflon ", which is excellent in heat resistance that can withstand a long period of time even at a high temperature of about 260 DEG C or more and has flame retardancy And has excellent chemical resistance to contaminants having acidity or basicity, so that the above properties can be imparted to the repair reinforcement of the concrete structure according to the present invention .

At this time, the polyfluoroethylenic copolymer resin contained in the repair reinforcing material of the concrete structure can be either a liquid state or a solid state (powder state). When a solid state resin is used, the polyether etherketone copolymer resin It is preferable to use those having an average particle size within the same range as the average particle size.

It is preferable that the polyfluorinated ethylene copolymer resin is constituted so as to have a composition ratio within 0.5 to 5 parts by weight with respect to 100 parts by weight of water contained in the repair reinforcement of the concrete structure. If the amount of the polyfluoroethylenic copolymer resin is less than 0.5 parts by weight, the composition ratio is insufficient, and the improvement in physical properties such as heat resistance, flame retardancy, and chemical resistance of the repair reinforcing material of the concrete structure caused by the polyfluoroethylene- However, if the amount exceeds 5 parts by weight, improvement in physical properties by the poly (ethylenecopolymer) copolymer resin is more excellent, but economical efficiency is lowered, and adhesion of the repair reinforcing material of the concrete structure by the cement and acrylic copolymer resin is decreased It is preferable to have the composition ratio in the above range.

In addition, the carbon nanotube (CNT) of the present invention is a tube-shaped carbon-bonded body having six nano-sized hexagons each having a nano-sized diameter ranging from 50 to 100 nm, (Detachability) is less than that of a carbon black having a plate-like structure, durability is excellent, and all the elements (carbon) constituting the carbon nanotubes are exposed on the surface. There are many carbon atoms to induce the reaction, and when the carbon black reacts with the contaminants to generate a certain electrostatic reactivity, it has an electrostatic dissipation capacity superior to carbon black.

At this time, the electrostatic dissipation capacity of the concrete structure repairing reinforcement by the carbon nanotube prevents the contaminants such as dust from adhering to the surface of the repair reinforcement according to the present invention applied to the concrete structure due to the electrostatic effect, The antifouling property of the maintenance reinforcing material can be improved.

The carbon nanotubes according to the present invention preferably have a size of 50 to 100 nm. When the carbon nanotubes have a size of less than 50 nm, the particle size is too small. Thus, water as a solvent of the concrete structure repair reinforcement, It is difficult to induce smooth dispersion of the copolymer resin, silica airgel and polyether ether ketone. When the size exceeds 100 nm, the carbon ratio (carbon density) of the carbon nanotubes to the repair reinforcement decreases, There is a problem that the static electricity dissipating capacity of the reinforcing material becomes insufficient.

When the average length of the carbon nanotubes is less than 1 mu m, the length of the carbon nanotubes is excessively short, And when the average length of the carbon nanotubes exceeds 30 탆, the length of the carbon nanotubes is excessively long, so that the carbon nanotubes are tangled with each other and are not easily dispersed It is preferable to have an average length within the above range, but it is not necessary to be limited to such a length.

When the composition ratio of the carbon nanotubes is less than 0.1 part by weight based on 100 parts by weight of water, the adhesion of the contaminants such as dust to the surface of the repair reinforcement decreases due to the static electricity, The dispersion force between the carbon nanotube particles can not be sufficiently induced. If the amount exceeds 5 parts by weight, the adhesion strength of the repair reinforcing material of the concrete structure may be deteriorated. Therefore, it is preferable that the composition ratio is 0.1 to 5 parts by weight.

The aromatic polyamide fiber (PA) according to the present invention is also called nylon resin and is a kind of engineering plastics, and is a crystalline plastic having excellent mechanical properties, particularly impact resistance, and is a polyamide acid amide bond [-CO-NH-] It is a linear polymeric substance constituting the backbone by repetition. At this time, aramid fibers are used in the present invention, which is also excellent in abrasion resistance, abrasion resistance, chemical resistance, oil resistance and the like. It absorbs moisture and lowers mechanical strength, but increases flexibility and impact resistance.

Therefore, it is preferable that the aramid fibers have a composition ratio within a range of 10 to 30 parts by weight with respect to 100 parts by weight of water contained in the repair reinforcement of the concrete structure. If the aramid fiber is contained in an amount of less than 10 parts by weight, the impact resistance is weak. If the aramid fiber is contained in an amount exceeding 30 parts by weight, the aramid fiber improves the physical properties more effectively, but the economic efficiency is lowered and the adhesive strength with concrete is weakened .

The cell rock according to the present invention is a natural insect resin which is used in everyday life by extracting insect body fluids and minerals having a size of 0.5 mm called Lac living in Kusmi and Rain-Tree of India and Thailand.

The celllock is the only insect resin that is harmless to the human body and approved by the FDA as a natural resin, and is widely used as a coating agent. It is used as an adhesive material because of its good adhesion to various materials. In addition, it is excellent in oil resistance and moisture-proofing effect, and has an excellent effect in minimizing damage such as chemical hypersensitivity and sick house syndrome.

Therefore, it is preferable to have a composition ratio within 20 to 30 parts by weight with respect to 100 parts by weight of water contained in the repair reinforcement material of the concrete structure. At this time, if the cell lock is contained in an amount of less than 20 parts by weight, the adhesive strength is weak and the moisture-proofing effect is poor. If the cell lock is contained in an amount exceeding 30 parts by weight, the property improvement by cell lock is more excellent. And after drying after repairing is fast, there is no release or odor of any harmful substances after work, no lifting phenomenon or cracking occurs, and the emission of harmful components such as formaldehyde is suppressed, the water resistance is excellent, And it has an effect of promoting flame retarding function.

In addition, the molten vitrification powder according to the present invention is formed by mixing floor glass and fly ash generated in a glass factory by collecting flooring and fly ash generated in an incinerator for incinerating general municipal waste.

As shown in FIG. 1, according to the process of the molten vitrification powder of the incineration ash, fly ash and fly glass as fly ash were mixed at a ratio of 7: 3 wt%, and the mixture was heated at a rate of 10 ° C. per minute, Mix for a while. When the temperature is lowered below 600 ° C, molten vitrification powder is produced.

That is, in the bottom ash obtained by incineration of municipal waste, and is mainly composed of SiO ₂ and Al ₂ O ₃ of sand forms the principal component, and the carbon and the like that occur in the alkaline earth metal oxide and the high temperature incineration process exists in the sub-configurations.

In addition, the fly ash is mainly composed of CaO, unlike the bottom ash, contains a large amount of Cl components, and a large amount of heavy metals is not negligible.

As mentioned above, heavy metal components generated during the incineration of general wastes occur at the normal level. When they are mixed with wave glass which is broken at the glass factory, these heavy metals are neutralized. Therefore, only a trace amount of these heavy metals is detected in the molten vitrified powder do.

Therefore, pollutants generated during the incineration process can be prevented, thereby protecting the natural environment.

It is preferable that the molten vitrification powder has a composition ratio within a range of 10 to 30 parts by weight based on 100 parts by weight of water. If the amount of the molten vitrification powder is less than 10 parts by weight, a warping phenomenon occurs in the curing process and the recycling rate of the waste material is lowered. When the amount of the molten vitrification powder is more than 30 parts by weight, the impact resistance is deteriorated and the strength with respect to the concrete is lowered. .

The molten vitrification powder thus obtained is excellent in strength, excellent in moisture resistance and impact resistance.

The repair and reinforcement material of the concrete structure according to the present invention may further contain 0.1 to 3 parts by weight of at least one dispersion inducing agent selected from the group consisting of lithium, sodium, potassium, beryllium, magnesium and calcium having an average particle size of 100 to 300 nm, .

Since the dispersion inducer easily emits electrons and the size of the element is smaller than that of the carbon nanotubes, the surface of the carbon nanotubes can be easily accessed, and the dispersion inducing agent that emits electrons instantaneously induces a polarization phenomenon on the surface of the carbon nanotubes, The effect of increasing the dispersibility of nanotube particles (because of the relaxation of van der Waals forces, which is the chemical cohesion force between carbon nanotube particles and carbon nanotube particles).

As the above-mentioned principle, the dispersion inducing agent of the present invention increases the dispersibility of the carbon nanotubes and the acrylic copolymer resin and the polyether ether ketone copolymer resin, which are high molecular materials, and thus the carbon nanotube can be effectively mixed with the repair reinforcing material . In addition, the present invention can surely obtain the effect of the above-mentioned composition by directly using a pure composition such as lithium, sodium, potassium, beryllium, magnesium, calcium, etc. However, considering the economical efficiency, an inorganic compound containing a large amount of the above- It is possible.

In connection with the above, using the dispersion inducing agent having an average particle size of 100 to 300 nm has a relatively large nanoparticle size and can induce a uniform dispersing power with the acrylic copolymer resin and the polyether ether ketone copolymer resin, This is because it is as close to the size of the tube as possible and can play an intermediate role in inducing a constant dispersion force with the carbon nanotubes.

In addition, when the composition ratio of the composition of any one or more of lithium, sodium, potassium, beryllium, magnesium and calcium or the inorganic compound containing the composition is less than 0.1 part by weight with respect to 100 parts by weight of water, The dispersion strength between the carbon nanotube particles through the carbon nanotube particles is insufficient. When the amount of the carbon nanotube particles exceeds 3 parts by weight, the adhesion strength of the repair reinforcement material of the concrete structure is lowered, so that it is preferable to have a composition ratio of 0.1 to 3 parts by weight.

In connection with the above, the repair reinforcing material of the concrete structure according to the present invention comprises the polyetheretherketone copolymer resin (when the polyfluoroethylenic copolymer resin is further contained, the polyfluoroethylenic copolymer resin is included) It is preferable to include a certain dispersing agent so as to be uniformly dispersed in other compositions of the repair reinforcement of the concrete structure.

In this case, the dispersant is contained in a composition ratio of 0.5 to 3 parts by weight with respect to 100 parts by weight of water. When the dispersant is contained in an amount of less than 0.5 part by weight, the composition ratio is insufficient, And if it exceeds 3 parts by weight, there is a possibility of adversely affecting the adhesive strength of the acrylic copolymer resin. Therefore, it is preferable to maintain the composition ratio within the above range.

The dispersant may be a generally used organic dispersant, but the present invention is not limited thereto. Examples of the dispersant include 2-2-2-methoxyethoxy ethoxy acetic acid, 5-methoxypentyl Examples thereof include 5-methoxypentyloxyacetic acid, 3,6,9-trioxadecane acid, palmitic acid, stearic acid, benzoic acid, acid, propionic acid, sodium polyacrylate, ammonium polyacrylate, cetyltrimethyl ammonium bromide (CTAB), polyacrylic sodium salt, dodecyl It is preferable to use one or more dispersing agents selected from the group consisting of dodecyl benzene sulfonate and sodium dodecyl sulfate (SDS).

A dispersant of this type is a carboxylic acid (R-COOH) that can be easily adsorbed to a polyetheretherketone copolymer resin (including a polyfluorinated ethylenic copolymer resin when a polyfluorinated ethylenic copolymer resin is further contained). Carboxylic acid, R-COO, carboxylate, alcohol, glycol, RNH3 + ammoniumate, sodium salt (R-Na +; sodium an alkyl (-R) or alkoxy (-OR) carbon chain which includes a functional group selected from the group consisting of a salt, sulfonate (R-SO3-) and sulfate (SO42-) Is a surfactant.

The dispersant of the present invention having the above structure has affinity with the polyetheretherketone copolymer resin so that the polyetheretherketone copolymer resin is adsorbed on the surface of the dispersant to have a functional group capable of being effectively dispersed in water as a solvent, Since a carbon compound such as alkyl (-R) or alkoxy (-OR) in a chain form which allows the molecular self-structure generated by adsorption of the ether ether ketone copolymer resin to be stable in a solvent is bonded, And exhibits excellent dispersibility and stability as compared with that of Comparative Example.

The antifoaming agent may be a conventional antifoaming agent corresponding to a water-soluble surfactant. The antifoaming agent may be used to remove bubbles which may be generated by curing the cement and acrylic copolymer resin contained in the repair reinforcement of the concrete structure according to the present invention.

If the amount of the antifoaming agent is less than 0.3 part by weight based on 100 parts by weight of the water contained in the repairing reinforcement of the concrete structure, the composition ratio of the antifoaming agent is insignificant and the bubble removing effect is somewhat insufficient. When the amount is more than 1 part by weight, However, it is preferable to be included in the repair reinforcement of the concrete structure at a composition ratio of 0.3 to 1 part by weight because the cost is low.

The resin curing agent is preferably constituted so as to have a composition ratio within a range of 10 to 30 parts by weight with respect to 100 parts by weight of water. If the resin curing agent is less than 10 parts by weight, it may take a long time for curing or a partial curing defect If the amount of the resin curing agent is more than 30 parts by weight, rapid curing may cause generation of heat, distortion of color distortion, and the like, which may hinder normal curing.

In addition, the fluidizing agent is a concrete with high fluidity by adding a high-performance water reducing agent (fluidizing agent) excellent in the dispersibility of cement particles to ordinary concrete. It has workability such as cracking without any change in concrete quality, It is possible to reduce the unit quantity and the amount of unit cement and thus to prevent temperature cracking.

Accordingly, when the amount of the fluidizing agent is less than 0.1 part by weight based on 100 parts by weight of water, the effect of preventing the cracking of the bubbles is insufficient due to insufficient composition ratio of the fluidizing agent. When the amount exceeds 3 parts by weight, To 3 parts by weight of the reinforcement material of the concrete structure.

On the other hand, since a small amount is required for use as a repair reinforcing material, the fluidizing agent may be omitted since there is no significant problem of cracking as well as not requiring the pressurization by a pump.

The present invention may also be configured such that the repair reinforcement of the concrete structure further comprises 1 to 5 parts by weight of stone having a certain average particle size with respect to 100 parts by weight of water.

Specifically, the stone may be a general one used for improving heat insulation, heat resistance and flame retardancy, such as vermiculite or perlite, and the average particle size preferably has an average size of 150 to 400 μm. If the average particle size is less than 150 탆, the size of the stone particles as an inorganic substance is too small to disperse the acrylic copolymer resin contained in water as a solvent. When the average particle size exceeds 400 탆, the size of the stone particles becomes excessively large, It is preferable to have an average particle size in the above range.

If the stone is contained in an amount less than 1 part by weight with respect to 100 parts by weight of water in the repairing reinforcement of the concrete structure, the effect of imparting the material by the stone is insignificant, so that it is preferably contained in 1 part by weight or more, more preferably 5 parts by weight It is apprehended that the stiffness of the acrylic copolymer resin may be lowered because the stone is excessively contained in the repair reinforcing material of the concrete structure.

The construction method using the repair reinforcement of the concrete structure of the present invention thus constructed will be described in more detail as follows.

First, the mixture A, which is the repair and reinforcement material of the concrete according to the present invention, and the mixture C in which the mixture A and the mixture B are mixed at the same ratio are prepared.

The mixture A is prepared by mixing 60 to 80 parts by weight of cement, 20 to 50 parts by weight of an acrylic copolymer resin, 0.5 to 3 parts by weight of silica airgel, 0.5 to 3 parts by weight of a polyether ether ketone 0.1 to 5 parts by weight of carbon nanotubes (CNT) having an average diameter of 50 to 100 nm and an average length of 1 to 30 占 퐉, 0.5 to 3 parts by weight of a dispersant, 0.3 to 1 part by weight of a defoaming agent By weight.

The mixture B is prepared by mixing 10 to 30 parts by weight of an aromatic polyamide fiber, 10 to 30 parts by weight of molten vitrification powder, 20 to 30 parts by weight of a cellar, 10 to 30 parts by weight of a resin curing agent, By weight and 0.1 to 3 parts by weight of a fluidizing agent.

And the mixture C is prepared by mixing 50 parts by weight of the mixture A and 50 parts by weight of the mixture B, respectively.

In order to construct the cracked concrete surface with the repair reinforcing material of the concrete structure manufactured as described above,

The pretreatment step is carried out to clean the surface of the cracked concrete structure by the first stage construction.

The second stage construction step is performed to apply the underground adjustment material to the surface of the concrete structure subjected to the pre-treatment step.

60 to 80 parts by weight of cement, 20 to 50 parts by weight of an acrylic copolymer resin, 0.5 to 3 parts by weight of silica airgel, 0.1 to 3 parts by weight of a polyether ether ketone, 0.1 to 5 parts by weight of a carbon nanotube (CNT) having an average diameter of 50 to 100 nm and an average length of 1 to 30 占 퐉, 0.5 to 3 parts by weight of a dispersant, and 0.3 to 0.3 parts by weight of a defoamer 0.3 ~ 1 part by weight of the mixture A,

10 to 30 parts by weight of aromatic polyamide fibers, 10 to 30 parts by weight of molten vitrified powder, 20 to 30 parts by weight of celluloses and 10 to 30 parts by weight of resin curing agent are contained in 100 parts by weight of water And a mixture C in which the mixture B is mixed with the mixture A in 50 parts by weight: 50 parts by weight.

In addition, according to the judgment of a person skilled in the art, the repair reinforcing material of the concrete structure according to the present invention may be prepared by adding a common additive such as a thickener, a pH adjusting agent, a resin hardener, an inducing agent or a hardener to a composition ratio within a range that does not impair the physical properties of the concrete structure It will be obvious.

Hereinafter, preferred embodiments 1 and 2 of the present invention will be described in detail with reference to the accompanying drawings.

[Example 1]

1. To 100 kg of ion-exchanged water, 2.5 kg of 5-methoxy pentyloxy acetic acid as a dispersant and 0.7 kg of an antifoaming agent (SPKORIA, cp-701) were added and stirred.

2. 6 kg of polyetheretherketone (VICTREX, PEEK 150P) is milled to have an average particle size of 300 nm.

3. 70 kg of Portland cement (Hyundai Cement), 30 kg of water-based acrylic resin, 1.5 kg of silica airgel, 5 kg of polyether ether ketone having been subjected to the 2nd step treatment and 5 kg of an average diameter of 70 nm and an average length of 20 탆 2 kg of carbon nanotubes (CNT, H chemistry) are added and mixed with stirring to produce a repair reinforcement material for the concrete structure.

[Example 2]

1. To 100 kg of ion-exchanged water, 2.5 kg of 5-methoxy pentyloxy acetic acid as a dispersant and 0.7 kg of an antifoaming agent (SPKORIA, cp-701) were added and stirred.

2. 6 kg of polyetheretherketone (VICTREX, PEEK 150P) is milled to have an average particle size of 300 nm.

3. 2 kg of magnesium carbonate are milled to have an average particle size of 200 nm.

4. 70 kg of Portland cement (Hyundai Cement), 30 kg of water-based acrylic resin, 1.5 kg of silica airgel, 5 kg of polyether ether ketone having been treated in step 2, 70 kg of an average diameter of 70 nm and an average length of 20 탆 2 kg of carbon nanotubes (CNT, H chemistry) and 1.5 kg of magnesium carbonate treated in the third step are added and stirred to prepare a repair reinforcement material for a concrete structure.

 [exam]

1. Adhesion (adhesion strength), water resistance, heat resistance, flame retardancy, and chemical resistance of the comparative example of the repair structure of the concrete structure manufactured in Examples 1 and 2 and the conventional repair reinforcement (Sure Coating, Super Con'c Patch) And weather resistance were respectively tested by the test methods shown in Table 1, and the results are shown in Table 1.

2. In order to test the antifouling property of the comparative example of the repair structure of the concrete structure manufactured according to Examples 1 and 2 and the conventional repair reinforcement (Sure Coating, Super Con'c Patch), the surface resistances are respectively tested.

At this time, the test method for testing the surface resistance of the repair structure of the concrete structure is not specially specified, so it was tested in accordance with KS M 3015, which specifies the method of testing the surface resistance of the thermosetting plastic.

The results are shown in Table 2 below.

[Example 3]

1. To 100 kg of ion-exchanged water, 2.5 kg of 5-methoxy pentyloxy acetic acid as a dispersant and 0.7 kg of an antifoaming agent (SPKORIA, cp-701) were added and stirred.

2. 6 kg of polyetheretherketone (VICTREX, PEEK 150P) is milled to have an average particle size of 300 nm.

3. 70 kg of Portland cement (Hyundai Cement), 30 kg of water-based acrylic resin, 1.5 kg of silica airgel, 5 kg of polyether ether ketone having been subjected to the 2nd step treatment and 5 kg of an average diameter of 70 nm and an average length of 20 탆 2 kg of carbon nanotubes (CNT, H chemistry) are added and mixed with stirring to produce a repair reinforcement material for the concrete structure.

4. 30Kg of 30Kg molten glass powder, 30Kg of polyamide fiber, 30Kg of resin hardening agent, and 2Kg of fluidizing agent are mixed with 100Kg of concrete repairing reinforcement material to produce repair reinforcement of concrete structure which does not cause floating phenomenon or cracking.

At this time, the test method for testing the surface resistance against cracking and peeling of the repair structure of the concrete structure is not specially specified, so the test was conducted according to KS M 3015 which specifies a method for testing the surface resistance of the thermosetting plastic.

The results are shown in Table 3 below.

[Example 4]

Harmful factors related to the harmful factors of the human body are stipulated specifically in Table 11-2 of the Enforcement Regulations for classification types and classification standards. That is, harmful factors are measured using chemical, physical, and biological factors.

Therefore, the test of the repair and reinforcement material of the concrete structure manufactured by the present invention was tested with chemical harmful factors, and as a result, it was found that explosive, oxidative, extreme chemical, high ignitability, flammability, gold water, high toxicity, toxic, Irritation, irritability, carcinogenicity, mutagenicity and reproductive toxicity.

[result]

As can be seen from Table 1, the repair and reinforcement of the concrete structure according to the present invention has excellent adhesion, water resistance, heat resistance, flame retardancy, chemical resistance and weather resistance as compared with conventional repair and reinforcement materials .

Also. As can be seen from [Table 2], it is found that the surface resistance is lower than that of the conventional repairing and reinforcing material, and the antifouling property by static electricity dissipation is excellent.

In particular, the repair and reinforcement of a concrete structure according to the present invention has an excellent heat resistance property as compared with a conventional repair and reinforcement material having a maximum temperature of about 7 to 15 K and a final equilibrium temperature difference in terms of heat resistance, In addition to the flame retardancy, the conventional paint has an action stopping time of about 10 to 15 minutes, and has an excellent flame retardancy.

As can be seen from [Table 2], Examples 1 and 2 according to the present invention have much lower surface resistance than the Comparative Examples and have excellent static dissipation ability, and as a result, antifouling property against contaminants such as dust It can be seen that it is excellent.

In connection with the above, Example 2 of the present invention is a case where the repairing and reinforcing material of the concrete structure according to Example 1 further includes a dispersion inducing agent, and the dispersing ability of the carbon nanotubes by the dispersion inducing agent is improved, Which is lower than the repair and reinforcement of the concrete structure according to Example 1.

Also, as shown in Table 3, it can be seen that the repair and reinforcement of the concrete structure according to the present invention has better adhesion strength than the conventional repair and reinforcement, as well as prevention of cracking and lifting .

As can be seen from Example 4, the repair and reinforcement of the concrete structure according to the present invention is not harmful to the human body.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, The present invention is not limited thereto.

Claims (4)

60 to 80 parts by weight of cement, 20 to 50 parts by weight of an acrylic copolymer resin, 0.5 to 3 parts by weight of silica airgel, 1 to 10 parts by weight of a polyether ether ketone copolymer resin A mixture A comprising 0.1 to 5 parts by weight of carbon nanotubes (CNT) having an average diameter of 50 to 100 nm, 0.5 to 3 parts by weight of a dispersant, and 0.3 to 1 part by weight of an antifoaming agent;
10 to 30 parts by weight of aromatic polyamide fibers and 10 to 30 parts by weight of water were mixed homogeneously at a ratio of 7: 3 wt% with respect to 100 parts by weight of water, and the mixture was heated at a rate of 10 DEG C per minute to a temperature of 1400 DEG C, 10 to 30 parts by weight of molten vitrification obtained by quenching at 600 DEG C or lower, 20 to 30 parts by weight of shellac, and 10 to 30 parts by weight of a resin curing agent;
Wherein the mixture A and the mixture B are mixed in a ratio of 50 parts by weight to 50 parts by weight.
The method according to claim 1,
Wherein the aromatic polyamide fiber is an aramid fiber.
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