KR102188769B1 - Acid-resistant epoxy paint composition for concrete structures, and construction method using the same - Google Patents

Abstract

The present invention relates to an acid-resistant epoxy paint composition for a concrete structure and a construction method using the same. The present invention, in an acid-resistant construction method of an underground structure, includes: a pretreatment step of removing foreign substances from the surface of the concrete structure; a surface treatment and cross-section restoration mortar step after breaking the cracked and severely corroded surface of the concrete structure; a first epoxy layer coating step of coating by laminating first acid-resistant epoxy paint layers made of novolac-modified epoxy paint on the surface-treated concrete structure; and a second epoxy layer coating step of coating a second acid-resistant epoxy paint layer made of novolac-modified epoxy paint on the first acid-resistant epoxy paint layer. As a result, an antifouling function can be increased as the surface of a coating film is provided with a slip property, and an added herbaceous liquid extracted from plants adheres to the surface so as to block pollutants and root eating of microorganisms penetrating the concrete surface.

Description

Acid-resistant epoxy paint composition for concrete structures, and construction method using the same}

The present invention relates to an acid-resistant epoxy paint composition for a concrete structure and a construction method using the same, and more specifically, a microbe that imparts slip properties to the surface of the coating film and adheres to the surface by adding a herbaceous extract extracted from a plant to penetrate the concrete surface. The present invention relates to an acid-resistant epoxy coating composition for concrete structures and a construction method using the same to increase the antifouling function because it blocks the roots of the body and contaminants.

Concrete structures, especially underground water passages through which water flows, and sewage culverts are long-term enclosed humid environments, the generation of various gases such as carbon dioxide and sulfur dioxide, chemical elements caused by sewage containing microorganisms, and repeated friction between water and suspended solids. This causes damage to the concrete surface. In particular, deterioration, erosion, and corrosion of concrete due to chemical reactions of sewage and sewage may cause problems that may lead to the risk of collapse of the structure.

Accordingly, in the relevant technical field, it improves acid resistance, alkali resistance, and water resistance to increase the durability and lifespan of structures that are corroded by various harmful chemical gases, as well as increase the slip property of the coating film surface, and root corrosion and contamination of various microorganisms. There is a need for technology development to prevent adhesion of substances.

Korean Patent Application No. 10-2008-0025846 (2008.03.20) "METHOD FOR CONSTRUCTING OF CHEMICAL-RESISTANT UNDERGROUND STRUCTURE"

The present invention is to solve the above problems, and the antifouling function is increased because it is attached to the surface by adding a herbaceous extract extracted from plants and blocking the roots of microorganisms penetrating into the concrete surface. It is to provide an acid-resistant epoxy coating composition for concrete structures and a construction method using the same.

In addition, the present invention is more rapidly corroded and deteriorated than external concrete due to the rooting of sulfurous acid gas, carbon dioxide gas, and microorganisms generated in buildings such as sewage culverts, underground waterways, sewage pipes, agricultural waterways, wastewater tanks, and animal manure treatment tanks. Therefore, in order to prevent the possibility of collapse of the structure, an acid-resistant epoxy coating composition for concrete structures to protect the concrete structure and to prevent corrosion by constructing a composition with stronger acid resistance than the conventional neutral flame protection paint, and It is to provide a construction method using this.

However, the objects of the present invention are not limited to the above-mentioned objects, and other objects that are not mentioned will be clearly understood by those skilled in the art from the following description.

In order to achieve the above object, the construction method using an acid-resistant epoxy paint composition for a concrete structure according to an embodiment of the present invention is a pretreatment step of removing foreign substances from the surface of the concrete structure in the acid-resistant construction method of an underground structure. ; Surface treatment and cross-section restoration mortar step after breaking the cracked and highly corroded surface of the concrete structure; A first epoxy layer coating step of coating by laminating a first acid-resistant epoxy paint layer made of a noblock-modified epoxy paint on the surface-treated concrete structure; And a second epoxy layer coating step of coating a second acid-resistant epoxy coating layer made of a noblock-modified epoxy coating on the first acid-resistant epoxy layer coating layer. It may be characterized in that it includes a.

In order to achieve the above object, the acid-resistant epoxy coating composition for a concrete structure according to an embodiment of the present invention is a silicone and siloxanes, low silicone and siloxanes, as a first functional component to improve the wettability and slip property for "antifouling function" in the epoxy resin. By mixing and adding boiling point hydrogen treated naphtha, 2-methoxy-1-methylethyl acetate, and oct-1-ene in a weight ratio of 2 to 3: 0.3 to 0.4: 0.1 to 0.2: 0.05 to 0.07, the slip property is increased and contamination with microorganisms It may be characterized by lowering the adhesion of the material.

The acid-resistant epoxy coating composition for a concrete structure according to an embodiment of the present invention and a construction method using the same, are applied to the surface of the coating film and attach to the surface by adding wood vinegar extract extracted from plants, and the root of microorganisms penetrating the concrete surface. As it blocks pollutants, it provides an effect that can increase the antifouling function.

In addition, the acid-resistant epoxy coating composition for a concrete structure according to another embodiment of the present invention and a construction method using the same, are sulfurous acid generated in buildings such as sewage culverts, underground waterways, sewage pipes, agricultural waterways, wastewater tanks, and animal manure treatment tanks. Corrosion and deterioration proceed more rapidly than external concrete due to the rooting of gas, carbon dioxide gas, and microorganisms, and to prevent the possibility of collapse of the structure, a composition with stronger acid resistance than the conventional neutral flame protection paint is constructed. Thus, it provides the effect of protecting the concrete structure and preventing corrosion.

1 is a view showing a construction method using an acid-resistant epoxy coating composition for a concrete structure according to an embodiment of the present invention.

Hereinafter, a detailed description of a preferred embodiment of the present invention will be described with reference to the accompanying drawings. In the following description of the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, a detailed description thereof will be omitted.

1 is a view showing a construction method using an acid-resistant epoxy coating composition for a concrete structure according to an embodiment of the present invention. Referring to FIG. 1, the surface treatment (S11), the cross-section restoration mortar (S12), the first acid-resistant epoxy coating composition composition application (S13), and the second acid-resistant epoxy coating composition composition application (S14) may be performed in this order.

First, a process of surface treatment (S11) will be described.

A step of surface-treating the surface of a concrete structure connected to a sewage pipe, agricultural waterway, wastewater tank, animal manure treatment tank, etc. at high pressure, and may further include arranging construction parts such as deteriorated or damaged parts of the concrete structure. Specifically, after removing foreign substances on the surface to be constructed, arranging the surface with a grinder or the like, cleanly cleaning using a high pressure pressure or the like, and if necessary, a primer or the like may be applied to the construction site first.

More specifically, the concrete structure is porous and a physical wedge effect can be expected, so it is quite good as a basis for the coating, but a certain amount of frontal treatment is required to ensure adhesion between concrete and acid-resistant epoxy paint composition, paint, etc. . Among these, the removal of materials that do not adhere to the coating material or materials that become flaws in the coating film after construction is scrapped off the surface. Another purpose of the face treatment is to ensure a continuous coating by removing defects on the surface. The irregularities in the deteriorated area should be treated flat, especially in the underground structure, the surface damaged by chemicals should be pecked until normal concrete comes out, and the salts on the surface should be thoroughly removed.

If water-soluble salts are present, they are pre-coated with high permeability such as polyurethane, and they are immersed in water like a sewer or swelling is likely to occur under high-humidity conditions. Therefore, if necessary, the salts must be sufficiently removed by washing with jet water.

Next, look at the cross-section restoration mortar (S12) process.

That is, a mortar composition is filled in the concrete structure that has been washed in step (S11), and the filled mortar composition is cured, so that the concrete structure is filled and cured with a mortar composition having excellent physical properties such as durability on the cross section of the concrete structure. It can provide an effect that can extend the life of the product.

Here, as a step of filling (reinforcing) the mortar composition in the cleaned construction site, various discharging equipment can be used, and if the area is small, it can be performed directly by a person, and the filled mortar composition can be cured for a certain period of time. Concrete structures can be repaired and reinforced. At this time, if necessary, various finishing materials such as a coating agent may be further applied to the reinforced area.

Next, it looks at the process of applying the first acid-resistant epoxy coating composition (S13).

A first acid-resistant epoxy paint layer may be formed by laminating a first acid-resistant epoxy paint composition made of a noblock-modified epoxy paint on the face-treated concrete structure by performing the cross-section restoration mortar (S12).

The first acid-resistant epoxy paint composition used here uses an acid-resistant epoxy paint with excellent chemical resistance, acid resistance, and alkali resistance to block chemical elements and maximize the neutral flame damage prevention function of the product. In addition, the first acid-resistant epoxy coating composition imparts a slip property on the surface of the coating film and adheres to the surface by adding a herbaceous liquid extracted from plants, thereby blocking the roots of microorganisms and contaminants penetrating the surface of the concrete structure, thereby increasing the antifouling function.

Silicone and siloxanes, low boiling point hydrogen treated naphtha, 2-methoxy-1-methylethyl acetate, oct-1-ene as the first functional ingredients to improve slip and wettability for the "antifouling function" of the first acid-resistant epoxy coating composition By mixing and adding in a weight ratio of 2 to 3: 0.3 to 0.4: 0.1 to 0.2: 0.05 to 0.07, the adhesion of microorganisms and contaminants can be lowered by increasing the slip property.

In addition, by adding polyether modified dimethylpolysiloxane and polyalkylene glycol alkylene ether acetate in a weight ratio of 2 to 3: 1 to 1.2 as a second functional ingredient for the "waterproof function" of the first acid-resistant epoxy paint composition, microbes and contaminants by increasing slip properties It can reduce the adhesion of and prevent cratering.

In addition, polyether modified, hydroxy-fuctional polydimethylsiloxane is 3 to 3 as a third functional ingredient, which is the "solvent-free additive (oil-soluble, UV-curable paint and silicone surface additive for printing ink)" of the first acid-resistant epoxy paint composition. 4: By adding in a weight ratio of 0.5 to 1, it is possible to improve material wettability, prevent cratering, and increase surface slip properties.

In addition, by adding wood vinegar liquid (vegetable wood vinegar liquid) as a fourth functional component of the first acid-resistant epoxy coating composition, it is possible to provide microbial root erosion prevention, deodorization effect, and anti-fungal effect.

Here, the first functional ingredient, the second functional ingredient, the third functional ingredient, and the fourth functional ingredient are respectively 3 to 4: 1.7 to 2.5: 1.6 to 2.3: 1.2 to 1.5 weight ratio of the total 100 of the first acid-resistant epoxy coating composition described later. It is preferable to mix 2.5 to 3.5 parts by weight based on parts by weight.

The first acid-resistant epoxy coating composition is an acid-resistant epoxy coating resin, comprising: bisphenol F-based Formaldehyde; oligomeric reaction products with 1-chloro-2,3-epoxypropane and phenol; Or a mixture of these is used, and it is generally Formaldehyde polymer with (chloromethyl)oxirane and phenol; (Butoxymethyl)oxirane; Or a mixture thereof, or Formaldehyde polymer with (chloromethyl)oxirane and phenol; 2,2-Bis(4'-glycidyloxyphenyl)propane; Alternatively, a mixture thereof may be used, and the content may be 20 to 30 parts by weight.

In addition, the first acid-resistant epoxy coating composition is an acid-resistant epoxy coating resin, comprising: phenol noblock-based Formaldehyde; oligomeric reaction products with 1-chloro-2,3-epoxypropane and phenol; Or a mixture thereof, and alternatively, Formaldehyde polymer with (chloromethyl)oxirane and phenol is used, or Phenol polymer with formaldehyde; glycidyl ether; Or a mixture thereof may be used, and the content may be 20 to 30 parts by weight.

The viscosity modifier is propylene glycol monomethyl ether; Water; Acetic acid, PM-Isomer; A weight ratio of 1 to 2: 1.1 to 1.2: 0.5 to 0.6 is mixed and used, and the weight ratio between acetic acid and PM-Isomer is 0.9 to 1.2: 1.1 to 1.3, but benzyl alcohol can be used as a general rule, and the content is It may be 3 to 8 parts by weight.

The pigment may have an amount of 3 to 8 parts by weight.

As a dispersant, BUTYL GLYCOL ETHER can be used as a butyl cellosolve series, and it is generally a high molecular weight block copolymer with pigment affinic groups; 2-methoxy-1-methylethyl acetate; Dipropylene glycol monomethyl ether; n-butyl acetate; Or a mixture thereof, or Copolymer with acidic groups Phosphoric acid; Fatty acids, tall-oil, reaction products with 2-[(2-aminoethyl)amino]ethanol; Or a mixture thereof, or Copolymer with acidic groups; Phosphoric acid; Or a mixture thereof may be used, and the content may be 0.2 to 1.5 parts by weight.

The antifoaming agent serves to increase the adhesion of the first acid-resistant epoxy coating composition to the concrete layer by suppressing bubbles generated when the first acid-resistant epoxy coating composition is applied, and includes: Solution of foam destroying polysiloxanes; 2,6-dimethylheptan-4-one; di-isobutyl ketone; Alternatively, a mixture of these may be used, which are generally non-aqueous emulsion of fluorine modified polysiloxanes; Silicon dioxide; Or Fluorine modified polysiloxane; Cyclohexanone; Or Butadiene copolymer; Solvent naphtha (Low boiling point naphtha unspecified); 2-methoxy-1-methylethyl acetate; 2,6-di-tert-butyl-4-cresol; May be used, and the content may be 0.6 to 1 part by weight.

The defoaming agent prevents and removes bubbles from occurring when the first acid-resistant epoxy coating composition is applied, and serves to improve the manufacturing process, including foam destroying polymers, silicone free; Solvent naphtha (petroleum), light arom. (Low boiling point naphtha unspecified); 2-methoxy-1-methylethyl acetate; Alternatively, mixtures of these may be used, which are generally foam destroying polymers, silicone free; Solvent naphtha; 2-methoxy-1-methylethyl acetate; 2,6-di-tert-butyl-4-cresol; Or a mixture thereof, or Fluorine modified polysiloxane; Cyclohexanone; Or a mixture thereof, or a polyether modified methylalkyl polysiloxane copolymer; Low boiling point hydrogen treated naphtha; Oct-1-ene; 2-methoxy-1-methylethyl acetate; Alternatively, a mixture thereof may be used, and the content may be 0.1 to 0.7 parts by weight.

The leveling agent is to improve the appearance characteristics of the coating film while improving the adhesion in the composition by leveling the composition constituting the first acid-resistant epoxy coating composition to be coated flat and smoothly.Combination of high boiling aromatics, ketones, esters and a polydimethylsiloxane ; Solvent naphtha; Diisobutyl ketone; Butyl glycolate; Or a mixture thereof may be used, and the content may be 5 to 7 parts by weight.

The additive is aluminum oxide; Hydroxy aluminum; Alternatively, a mixture thereof may be used for rust prevention and corrosion resistance, and the content may be 30 to 50 parts by weight.

Silicon dioxide may be included in an amount of 0.3 to 0.5 parts by weight as an anti-settling function, and benzotriazole may be included in an amount of 0.3 to 0.5 parts by weight as an anti-yellowing function.

In addition, it may contain an amount of 0.3 to 0.5 parts by weight of Modified urea N-methyl-2-pyrrolidone.

On the other hand, the first acid-resistant epoxy coating composition may additionally include a CNT nanocomposite, a thermally conductive adhesive, and a curing agent, and includes 15 to 17 parts by weight based on 100 parts by weight of the acid-resistant epoxy coating resin of the first acid-resistant epoxy coating composition, It is preferable that the weight ratio between the CNT nanocomposite agent, the thermally conductive adhesive, and the curing agent is 15 to 16: 2 to 3: 11 to 13, and it is possible to maximize the release efficiency to the outside through the heat diffusion, heat transfer, and heat dissipation effects described later. have.

CNT nanocomposite has properties such as mechanical properties, conductivity properties, electrical conductivity, heat dissipation, high strength, weight reduction, abrasion resistance, and electromagnetic wave removal, and CNT nanocomposites have PCM capsule powder, organometallic polymer ( Polymer), a polypropylene resin composition is used to form a composite plastic resin, thereby improving adhesion, as well as heat diffusion and heat transfer by PCM capsule powder against the latent heat of the concrete surface, and the heat dissipation effect of the CNT nanocomposite. It is possible to improve the emission efficiency to the outside.

That is, the CNT nanocomposite contains 12 to 13 parts by weight, 5 to 8 parts by weight, 6 to 9 parts by weight, 23 to 25 parts by weight of PCM capsule powder, organometallic polymer, and polypropylene resin based on 100 parts by weight of CNT nanotubes. By providing a composite plastic resin formed using a composition corresponding to parts by weight, heat diffusion and heat transfer by PCM capsule powder against the latent heat of the concrete surface when forming the first acid-resistant epoxy paint composition, and heat dissipation of CNT nanotubes Through the effect, the efficiency of emission to the outside can be improved.

Thermally conductive adhesive is a thermally conductive adhesive with excellent adhesiveness and thermal conductivity that additionally contains metal nanowires.It is a thermally conductive adhesive that contains a small amount of nano-sized fine metal nanowires as a conductive filler, so that conventional thermally conductive adhesives cannot. By providing a thermally conductive adhesive that exhibits remarkably high thermal conductivity and has excellent adhesiveness and heat dissipation properties at the same time, it is possible to improve adhesion performance through thermal stabilization on the upper and lower surfaces of the reinforcing material formation surface.

The curing agent is composed of an aliphatic amine resin, an aromatic amine resin, a curing accelerator, and a non-reactive diluent in a weight ratio of 2.1 to 2.2: 1.4 to 1.5: 1.5 to 2.1: 2.5 to 3.2 parts by weight, thereby performing curing for the first acid-resistant epoxy paint composition. I can.

Next, a process of applying the second acid-resistant epoxy coating composition (S14) will be described.

According to the application of the first acid-resistant epoxy coating composition (S13), a second epoxy resin made of a noblock-modified epoxy coating may be laminated on the first acid-resistant epoxy coating layer to form a second acid-resistant epoxy coating layer.

Here, the same first functional ingredient, second functional ingredient, third functional ingredient, and fourth functional ingredient used in the first acid-resistant epoxy coating composition were respectively added in a weight ratio of 3.5 to 4.2: 1.5 to 1.8: 1.5 to 1.8: 0.8 to 0.9. 2 It is preferable to mix 1.8 to 1.9 parts by weight based on the total 100 parts by weight of the acid-resistant epoxy paint composition.

The second acid-resistant epoxy paint composition uses the same resin as the first acid-resistant epoxy paint composition, and the rest of the composition of the second acid-resistant epoxy paint composition has the same components and contents as the first acid-resistant epoxy paint composition, as a viscosity modifier, pigment, dispersant, and antifoaming agent. , Defoaming agent, leveling agent, additive, silicon dioxide, benzotriazole, Modified urea N-methyl-2-pyrrolidone, may further contain "coal tar", "additive", "hardener" .

It is preferable to include 13 to 15, 2 to 3, 11 to 12 parts by weight based on 100 parts by weight of the acid-resistant epoxy paint resin of the second acid-resistant epoxy paint composition for each of the coal tar, additives, and curing agent. , Waterproof layer crack resistance, alkali resistance can be maximized.

In other words, since the acid-resistant epoxy paint resin and coultar are ideally blended through the above-described composition ratio, it has excellent waterproofing, impact resistance, water resistance, and adhesion, so that not only has a long service life, but also has excellent salt resistance and salt caused by deicing agents in winter. Because of its excellent water-resistance, the waterproof layer has no oxidation or aging phenomenon, so it has a long life.

As additives, "fiber", "rubber material", "elasticity enhancer", "nanofiber", and "moringa liquid" can be added. Fiber, rubber material, elasticity enhancer, nanofiber, moringa liquid on the total of 100 parts by weight of additives Silver 12 to 13: 5 to 7: 2 to 5: 3 to 5: 1 to 2 in the case of a weight ratio of 1 to 2, adhesiveness, hardness, waterproof layer crack resistance, alkali resistance in the mixing ratio of the total acid-resistant epoxy paint resin, coal tar, and additives The composition ratio that can maximize the was confirmed experimentally.

First, the "fiber" is a second acid-resistant epoxy coating composition that acts as a waterproof membrane formed by a concrete bridge waterproofing material by reinforcing at least one of glass fiber, carbon fiber, aramid fiber, and basalt fiber. It can prevent the occurrence of sagging of the acid-resistant epoxy paint layer and cracks of the waterproof film, and make it excellent in heat resistance and cold resistance.

Here, the fibers form a tight structure with a fine mesh structure to prevent cracking of the concrete bridge waterproofing material and extend the lifespan.

"Rubber material" is a second acid-resistant epoxy coating layer made of a second acid-resistant epoxy coating composition and a first made of a first acid-resistant epoxy coating composition due to the bumps of the bridge surface when moving the vehicle after the asphalt is poured after the bridge surface is waterproofed. Since the acid-resistant epoxy coating layer formed of the acid-resistant epoxy coating layer can be broken, the elongation is very important and can be added.

That is, for the acid-resistant epoxy coating layer according to the present invention, since coultar is contained in the second acid-resistant epoxy coating composition, the elongation can be maximized by adding a resin containing a rubber component, and an acid-resistant epoxy excellent in waterproofing is used, and the elongation is made of tar. The elongation is very important because of frequent small-scale earthquakes, so the elongation is further increased by adding a rubber component as an additional material.

The rubber material added in the present invention may be'acrylonitrile-butadiene rubber (acrylonitrile-butadiene rubber) = NBR'.

Next, "elasticity enhancer" is added to improve the elasticity and durability of the concrete bridge surface waterproofing composition, Silica nanoparticles, Copolymers, 2-methoxy-1-methylethyl acetate, 1-mehoxy-2-propanol; Surface-treated silica nanoparticles, Copolymers, HDDA (hexamethylene diacrylate), 2,6-Di-tert-butyl-p-cresol; Silica nanoparticles, Copoylmers, 2-methoxy-1-methylethyl acetate, 1-mehoxy-2-propanol; One corresponding to one of the groups consisting of may be added.

"Nanofiber" is a cellulose nanoparticle in order to provide excellent adhesion when applying an additional layer after the acid-resistant epoxy paint layer is formed by forming finely coarse pores when the second acid-resistant epoxy paint composition is applied to form an acid-resistant epoxy paint layer. Fiber can be added. In addition, the second acid-resistant epoxy paint composition, which is an acid-resistant epoxy paint according to the present invention in which nanofibers are involved, contains a cellulose-based nanofiber additive to exhibit strong adhesion to the first acid-resistant epoxy paint composition and the upper additional layer. It prevents cracking of the coating film, which is more common in the environment of extreme temperature difference, and improves freeze-thaw resistance.

Cellulose nanofibers exhibit high adhesion by forming cyclic particles between the existing first acid-resistant epoxy paint layer and the composition for the upper additional layer (eg, asphalt composition, etc.) due to the shape of the finely rough surface. It also maintains a high elongation rate to prevent cracking.

On the other hand, in order to prevent aggregation on the main composition of the concrete structure of the cellulose nanofiber, the added curing agent preferably contains an amine-type additive to help the decomposition of cellulose when agitating the main material and the curing agent.

That is, the curing agent used together with the second acid-resistant epoxy coating composition increases the binding between the particles of the main composition. After curing, an amine type aliphatic amine curing agent, other substituted amine curing agents, aromatics to improve durability and crack resistance. It is made by mixing at least one amine-based curing agent, an acid anhydride curing agent, and an amidazole-based curing agent, but in the present invention, the curing agent is made of a polyamide-modified polyamine containing a polyamine resistant to alkalis and acids as the main curing agent.

"Moringa liquid" is preferably used for antibacterial, anti-fungal, and microbial rooting in mixing the main composition of the concrete bridge surface waterproofing material and the hardener.

Moringa solution is used by diluting the powder obtained by finely pulverizing the fiber layer of Moringa seed with distilled water in a weight ratio of 1: 2 to 3, and the moringa seed powder is used by separately pulverizing Moringa seed to use a fiber layer, but the fiber layer of Moringa seed It is preferable to use 1.5 to 2.6 denier.

Thereafter, a reinforcing grid net and a tarpaulin may be installed on the second acid-resistant epoxy paint layer.

More specifically, chloride ion penetration resistance is improved by the second acid-resistant epoxy coating layer applied on the top of the first acid-resistant epoxy coating layer, and the reinforcing grid net and the tarpaulin on the top are cracked in the additional composition to be installed later. In addition to the structure that provides a buffering role that can protect the second acid-resistant epoxy paint layer, the first acid-resistant epoxy paint layer and the second acid-resistant epoxy paint layer are added before being completely cured, thereby forming each formed on the top of the concrete layer. Through the integrity of the layers, it is possible to provide the effect of reducing the damage to the asphalt layer, such as the occurrence of potholes in the summer season (rainy season, rainy season)/winter season (freezing, ice making).

In the present invention, the grid net is formed based on at least one or more of glass fiber, carbon fiber, aramid fiber, and basalt fiber, and can be automatically installed using a roller device. In addition, a non-woven fabric may be used as the waterproof fabric, and a honeycomb-shaped mesh structure may be formed according to the mesh process along with softening of the film between the heat stabilization process after stretching the non-woven fabric film. By forming such a structure, it is possible to provide flexibility and to provide a structure in which a plurality of tarpaulin films are stacked and a grid net is mounted.

The grid net used in the present invention may utilize a recycled polypropylene resin in which at least one of glass fiber, carbon fiber, aramid fiber, and Basalt fiber and a flame retardant are added to recycled polypropylene.

More specifically, polyethylene resin which is fiber reinforced plastic (FRP) by adding and mixing at least one or more of glass fiber, carbon fiber, aramid fiber, and basalt fiber among the above fibers to recycled polyethylene which is a waste synthetic resin The fiber-reinforced polyethylene resin has the advantage of being stronger than iron, lighter than aluminum, not rust, and excellent processability.

Here, the polyethylene-based raw material is 100 parts by weight of 50 to 65 parts by weight of fiber added to the resin composition consisting of 10 to 20 parts by weight of ethylene vinyl acetate copolymer (EVA) and 5 to 10 parts by weight of polyurethane based on 100 parts by weight of polyethylene. By adding and mixing 20 to 24 parts by weight of an inorganic filler and 5 to 7 parts by weight of a flame retardant to the resin, not only shows improved performance in tensile strength, flexural strength, load deformation temperature, and Izod impact strength, but also composition material Because it is inexpensive itself, it can lower the manufacturing cost.

Inorganic fillers are used to reduce the cost and increase the physical strength of the grid network, and as the types, calcium carbonate (heavy coal, hard coal), talc, mica, clay, needle-shaped inorganic powder (wallastonite, pangel or higher brand name) are used. Can

In the present invention, the grid net is formed based on at least one or more of glass fiber, carbon fiber, aramid fiber, and basalt fiber, and can be automatically installed using a roller device.

As described above, in the present specification and drawings, a preferred embodiment of the present invention has been disclosed, and although specific terms are used, this is only used in a general meaning to easily explain the technical content of the present invention and to aid understanding of the invention. , It is not intended to limit the scope of the present invention. In addition to the embodiments disclosed herein, it is apparent to those of ordinary skill in the art that other modified examples based on the technical idea of the present invention may be implemented.

Claims (2)

delete Pre-treatment step of removing foreign substances from the surface of the concrete structure to pretreatment;
Surface treatment and cross-section restoration mortar step after breaking the cracked and highly corroded surface of the concrete structure;
A first epoxy layer coating step of coating by laminating a first acid-resistant epoxy paint layer made of a noblock-modified epoxy paint on the surface-treated concrete structure; And
A second epoxy layer coating step of coating a second acid-resistant epoxy coating layer made of a noblock-modified epoxy coating on the first acid-resistant epoxy layer coating layer; The acid-resistant epoxy paint composition for concrete structures used in the acid-resistant construction method of underground structures including silicone and siloxanes, low boiling point as the first functional ingredient to improve slip and wettability for "antifouling function" in epoxy resin. By mixing and adding hydrogen treated naphtha, 2-methoxy-1-methylethyl acetate, and oct-1-ene in a weight ratio of 2 to 3: 0.3 to 0.4: 0.1 to 0.2: 0.05 to 0.07, the slip property is increased to prevent microorganisms and contaminants. Acid-resistant epoxy coating composition for concrete structures, characterized in that lowering adhesion.

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