KR101632170B1

KR101632170B1 - surface repair and cross section recovery method for concrete structure using resin mortar

Info

Publication number: KR101632170B1
Application number: KR1020150089953A
Authority: KR
Inventors: 이은숙; 이영회
Original assignee: 이은숙
Priority date: 2015-06-24
Filing date: 2015-06-24
Publication date: 2016-06-22

Abstract

The present invention relates to a method for preventing the deterioration of the load-bearing capacity and durability of a structural body due to progress of deterioration of concrete such as neutralization, There is no aggregate reaction and it is advantageous for prevention of the damage of road facilities, and it has no chemical reaction even with strong acid such as sulfuric acid. It is advantageous for sewage treatment plant, wastewater treatment plant, sewer pipe repair, and tight watertightness It is advantageous for structures that behave like bridges by suppressing impact, vibration absorption and cracking due to the elasticity of elastic resin. It is a resin that is resistant to ultraviolet rays and resistant to weathering due to complete waterproofing. Surface repair and section repair method of concrete structures using mortar The purpose is to provide.
According to an aspect of the present invention, there is provided a method of repairing a surface of a concrete structure using resin mortar, comprising: chipping a surface of a concrete structure; High pressure cleaning of the chipping portion of the concrete structure; Applying a sphere reinforcing agent to the surface of the high pressure cleaned concrete structure; Wherein the primer coating agent is composed of 80% by weight of resin mortar and 20% by weight of latex powder, and the resin mortar is a mixture of (a) A binder resin constituting a urethane acrylate resin as a first binder resin and a polymethylmethacrylate resin as a second binder resin, (b) sand, and (c) a filler, wherein the urethane acrylate resin and polymethylmethacrylate Wherein the resin is mixed with a binder resin in a ratio of 10 to 60:90 to 40 parts by weight and the filler is composed of calcium carbonate, talc or both, and the resin mortar is mixed with hydroxyethyl methacrylate (Hydroxy ethyl methacrylate, HEMA) resin, and the sand is composed of two or more types of sand having different particle sizes Or the sand is composed of sand having a particle diameter in the range of 0.2 mm to 0.4 mm, sand having a particle diameter in the range of 0.4 mm to 0.8 mm, or a mixture thereof, wherein the sand contains saline, And 1 to 20 parts by weight based on 100 parts by weight of the resin mortar. The gravel is added to the resin mortar, and the gravel has a particle diameter ranging from 2 mm to 15 mm. The particle diameter of the calcium carbonate is in a range of 10 to 80 μm Ti [OCH (CH ₃ ) ₂ ] ₄ } and isopropyl alcohol (Ti [OCH (CH ₃ ) ₂ ] ₄ ) are added to the surface of the primer coating agent. 0.57 mol / l of titanium dioxide (TiO ₂ ) sol prepared with isopropyl alcohol [(CH ₃ ) ₂ CHOH], tetraethyl orthosilicate tetraethoxysilane (C ₈ H ₂ O ₄ Si) manufactured by propyl alcohol _{(Isopropyl alcohol) [(CH 3} ) 2 CHOH] Silica _{(SiO 2) sol 0.44mol / ℓ} , zinc acetate (Zn acetate) [Zn (C 2 H 3 O 2) 2] a zinc oxide (ZnO) sol 0.5mol / ℓ, and silver (Ag) solution is prepared from each (TiO ₂ ) sol, silica (SiO ₂ ) sol, zinc oxide (ZnO) sol and silver (Ag) solution in the form of an aqueous solution or powder, TiO ₂₎ characterized in that the sol 50%, silica (SiO ₂₎ sol 40%, zinc oxide (ZnO) sol 9% and a silver (Ag) photocatalyst is applied a predetermined thickness consisting of a 1% ratio of an aqueous solution or powder-compound treated with do.
According to another aspect of the present invention, there is provided a method of recovering a section of a concrete structure using resin mortar, comprising: chipping a deteriorated portion of a concrete structure; Removing the rust of the reinforcing bar of the deteriorated portion; Washing the rust removal portion of the reinforcing bar at a high pressure; Applying a sphere reinforcing agent to the deteriorated portion of the high pressure cleaned concrete structure; Applying a primer coating agent to the surface of the spherical reinforcing agent; Applying a cross-sectional restorative to the surface of the primer coating; Wherein the primer coating agent is composed of 80% by weight of resin mortar and 20% by weight of latex powder, and the resin mortar is a (a ) A binder resin constituting a urethane acrylate resin as a first binder resin and a polymethylmethacrylate resin as a second binder resin (b) sand and (c) a filler, wherein the urethane acrylate resin and polymethyl methacrylate The resin composition according to claim 1, wherein the mixing ratio of the resin to the resin is in the range of 10 to 60:90 to 40 parts by weight, and the filler is composed of calcium carbonate, Talc or both, Hydroxy ethyl methacrylate (HEMA) resin is added, and the sand is composed of two or more kinds of sand having different particle diameters Or the sand is composed of sand having a particle diameter in the range of 0.2 mm to 0.4 mm, sand having a particle diameter in the range of 0.4 mm to 0.8 mm, or a mixture thereof, wherein the sand contains saline, And 1 to 20 parts by weight based on 100 parts by weight of the resin mortar. The gravel is added to the resin mortar, and the gravel has a particle diameter ranging from 2 mm to 15 mm. The particle diameter of the calcium carbonate is in a range of 10 to 80 μm Wherein the talc has a particle diameter in the range of 50 탆 to 200 탆, wherein the cross-sectional restorer comprises 40 to 60% by weight of silica sand, 10 to 25% by weight of calcium sulfoaluminate, 10 to 25% 0.15 to 5 wt% of a fluidizing agent, 0.05 to 5 wt% of a curing retarder, 0.5 to 10 wt% of an acrylic resin, and 2 to 10 wt% of an elastic resin, wherein titanium isopropoxide (Titanium isopropoxide) {Ti [OCH (CH 3) 2] 4} and isophthaloyl Peel alcohol _{(Isopropyl alcohol) [(CH 3} ) 2 CHOH] a titanium dioxide _{(TiO 2) sol 0.57mol / ℓ} , erroneous hit the tetra silicate tetra oxy silraen _{(Tetraethyl orthosilicate Tetraethoxysilane) (C 8} H 2 0O 4 Si prepared as ) And 0.47 mol / l of silica (SiO ₂ ) sol prepared from isopropyl alcohol [(CH ₃ ) ₂ CHOH] and zinc acetate [Zn (C ₂ H ₃ O ₂ ) ₂ ] (TiO ₂ ) sol, silica (SiO ₂ ) sol, zinc oxide (ZnO) sol, and silver (Ag) solution were prepared, ) it is made composite by processing an aqueous solution or powder form as a solution, compared to titanium dioxide this weight (TiO ₂₎ sol 50%, silica (SiO ₂₎ sol 40%, and zinc oxide (ZnO) sol 9% is (Ag) 1 % Ratio or a photocatalyst in powder form is applied to a certain thickness.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surface repair and cross section recovery method for a concrete structure using a resin mortar,

The present invention relates to a method for repairing and repairing a concrete structure using a resin mortar, and more particularly, to a method for repairing and repairing a concrete structure, in which deterioration of concrete such as neutralization, The present invention relates to a method for repairing a surface of a concrete structure and a method for repairing a section of the concrete structure.

In general, the concrete structure is deteriorated due to the deterioration of concrete such as neutralization, deformation, and corrosion due to environmental factors and deterioration of durability of materials used. Therefore, the load-bearing capacity and durability of the structure are lowered and safety is lowered. It is required to properly repair and reinforce the deteriorated concrete in order to recover the section and improve the durability of the concrete.

Conventional techniques widely used for maintenance and reinforcement of concrete structures include epoxy resin mortar and polymer cement mortar.

Epoxy resin mortar is hard to cure at low temperature due to high temperature dependency at curing, because workability and working time vary depending on compounding ratio of the base and curing agent, and thermal expansion coefficient is about 2 to 4 times that of concrete. There is a disadvantage that the amount of deformation due to high temperature is large.

In addition, the polymer cement mortar is superior to the epoxy resin mortar in terms of the integration with the sphere. However, since the thickener is added to improve the adhesion of the repair material, the surface and friction force inside the transportation hose are increased during the machine construction using the spray equipment, The clogging is required to improve the workability because the molar discharge rate is decreased and the construction speed is lowered and the trowel workability is poor depending on the kind of polymer and the amount of addition, and the thickness of the casting is relatively thin.

Patent No. 10-0846159 (Jul. 2008) Patent No. 10-0909997 (July 23, 2009) Patent No. 10-1105490 (2012.01.05)

SUMMARY OF THE INVENTION Accordingly, 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 structure which is deteriorated in bearing capacity and durability of a structural body due to deterioration of concrete such as neutralization, It is applied to the deteriorated part with resin mortar and is free from alkali aggregate reaction because it does not react with calcium chloride. It is advantageous for prevention of salting of road facilities and has no chemical reaction even with strong acid such as sulfuric acid and is advantageous for sewage treatment plant, wastewater treatment plant, , It is a compact polymer combination that ensures perfect watertightness due to the absence of pores due to the absence of pores and elasticity of the elastic resin, which suppresses shock, vibration absorption and cracking, and is advantageous for structures such as bridges. Resistant to ultraviolet rays and resistant to abrasion due to weathering To provide a concrete surface maintenance and repair section method using a mortar is not its purpose.

According to an aspect of the present invention, there is provided a method of repairing a surface of a concrete structure using resin mortar, comprising: chipping a surface of a concrete structure; High pressure cleaning of the chipping portion of the concrete structure; Applying a sphere reinforcing agent to the surface of the high pressure cleaned concrete structure; Wherein the primer coating agent is composed of 80% by weight of resin mortar and 20% by weight of latex powder, and the resin mortar is a mixture of (a) A binder resin constituting a urethane acrylate resin as a first binder resin and a polymethylmethacrylate resin as a second binder resin, (b) sand, and (c) a filler, wherein the urethane acrylate resin and polymethylmethacrylate Wherein the resin is mixed with a binder resin in a ratio of 10 to 60:90 to 40 parts by weight and the filler is composed of calcium carbonate, talc or both, and the resin mortar is mixed with hydroxyethyl methacrylate (Hydroxy ethyl methacrylate, HEMA) resin, and the sand is composed of two or more types of sand having different particle sizes Or the sand is composed of sand having a particle diameter in the range of 0.2 mm to 0.4 mm, sand having a particle diameter in the range of 0.4 mm to 0.8 mm, or a mixture thereof, wherein the sand contains saline, And 1 to 20 parts by weight based on 100 parts by weight of the resin mortar. The gravel is added to the resin mortar, and the gravel has a particle diameter ranging from 2 mm to 15 mm. The particle diameter of the calcium carbonate is in a range of 10 to 80 μm Ti [OCH (CH ₃ ) ₂ ] ₄ } and isopropyl alcohol (Ti [OCH (CH ₃ ) ₂ ] ₄ ) are added to the surface of the primer coating agent. 0.57 mol / l of titanium dioxide (TiO ₂ ) sol prepared with isopropyl alcohol [(CH ₃ ) ₂ CHOH], tetraethyl orthosilicate tetraethoxysilane (C ₈ H ₂ O ₄ Si) manufactured by propyl alcohol _{(Isopropyl alcohol) [(CH 3} ) 2 CHOH] Silica _{(SiO 2) sol 0.44mol / ℓ} , zinc acetate (Zn acetate) [Zn (C 2 H 3 O 2) 2] a zinc oxide (ZnO) sol 0.5mol / ℓ, and silver (Ag) solution is prepared from each (TiO ₂ ) sol, silica (SiO ₂ ) sol, zinc oxide (ZnO) sol and silver (Ag) solution in the form of an aqueous solution or powder, TiO ₂₎ characterized in that the sol 50%, silica (SiO ₂₎ sol 40%, zinc oxide (ZnO) sol 9% and a silver (Ag) photocatalyst is applied a predetermined thickness consisting of a 1% ratio of an aqueous solution or powder-compound treated with do.
According to another aspect of the present invention, there is provided a method of recovering a section of a concrete structure using resin mortar, comprising: chipping a deteriorated portion of a concrete structure; Removing the rust of the reinforcing bar of the deteriorated portion; Washing the rust removal portion of the reinforcing bar at a high pressure; Applying a sphere reinforcing agent to the deteriorated portion of the high pressure cleaned concrete structure; Applying a primer coating agent to the surface of the spherical reinforcing agent; Applying a cross-sectional restorative to the surface of the primer coating; Wherein the primer coating agent is composed of 80% by weight of resin mortar and 20% by weight of latex powder, and the resin mortar is a (a ) A binder resin constituting a urethane acrylate resin as a first binder resin and a polymethylmethacrylate resin as a second binder resin (b) sand and (c) a filler, wherein the urethane acrylate resin and polymethyl methacrylate The resin composition according to claim 1, wherein the mixing ratio of the resin to the resin is in the range of 10 to 60:90 to 40 parts by weight, and the filler is composed of calcium carbonate, Talc or both, Hydroxy ethyl methacrylate (HEMA) resin is added, and the sand is composed of two or more kinds of sand having different particle diameters Or the sand is composed of sand having a particle diameter in the range of 0.2 mm to 0.4 mm, sand having a particle diameter in the range of 0.4 mm to 0.8 mm, or a mixture thereof, wherein the sand contains saline, And 1 to 20 parts by weight based on 100 parts by weight of the resin mortar. The gravel is added to the resin mortar, and the gravel has a particle diameter ranging from 2 mm to 15 mm. The particle diameter of the calcium carbonate is in a range of 10 to 80 μm Wherein the talc has a particle diameter in the range of 50 탆 to 200 탆, wherein the cross-sectional restorer comprises 40 to 60% by weight of silica sand, 10 to 25% by weight of calcium sulfoaluminate, 10 to 25% 0.15 to 5 wt% of a fluidizing agent, 0.05 to 5 wt% of a curing retarder, 0.5 to 10 wt% of an acrylic resin, and 2 to 10 wt% of an elastic resin, wherein titanium isopropoxide (Titanium isopropoxide) {Ti [OCH (CH 3) 2] 4} and isophthaloyl Peel alcohol _{(Isopropyl alcohol) [(CH 3} ) 2 CHOH] a titanium dioxide _{(TiO 2) sol 0.57mol / ℓ} , erroneous hit the tetra silicate tetra oxy silraen _{(Tetraethyl orthosilicate Tetraethoxysilane) (C 8} H 2 0O 4 Si prepared as ) And 0.47 mol / l of silica (SiO ₂ ) sol prepared from isopropyl alcohol [(CH ₃ ) ₂ CHOH] and zinc acetate [Zn (C ₂ H ₃ O ₂ ) ₂ ] (TiO ₂ ) sol, silica (SiO ₂ ) sol, zinc oxide (ZnO) sol, and silver (Ag) solution were prepared, ) it is made composite by processing an aqueous solution or powder form as a solution, compared to titanium dioxide this weight (TiO ₂₎ sol 50%, silica (SiO ₂₎ sol 40%, and zinc oxide (ZnO) sol 9% is (Ag) 1 % Ratio or a photocatalyst in powder form is applied to a certain thickness.

As described above, the surface repair and section repair method of the concrete structure using the resin mortar according to the present invention has the following effects.

First, the present invention is an eco-friendly material in which microorganisms can live.

That is, the present invention is an eco-friendly material which minimizes the use of cement, has an antibacterial property of purifying the water, has a microorganism as a natural-friendly material, and has an effect of generating negative ions by a non-toxic and harmless resin ceramic material.

In particular, it has been found that heavy metal components such as cadmium (Cd), lead (Pb), mercury (Hg) and hexavalent chromium (Cr ⁶ ⁺ ), and halogen components such as bromine (Br) and chlorine (Cl) .

In addition, the present invention is advantageous in that it burns when continuously applying high heat from the outside, but burns off within 16 seconds if the heat source is lost, and does not burn by itself.

Second, the present invention is a fast-setting hard material capable of controlling the curing rate.

That is, the present invention can control the curing speed according to the maintenance position of the concrete structure, can be easily combined with resin mortar, easy to repair and rework, can be installed at the temperature of -5 ° C to + 50 ° C, It can be applied to meet the requirements of.

Particularly, since the present invention is based on resin mortar, it is possible to control the curing time of 1 hour or 1 hour to 2 days after repairing the surface of the concrete structure and restoration of the section, which is advantageous for emergency repair and reinforcement work in the urban area.

Third, the present invention is a high-strength material with high performance and long life.

That is, the present invention is an integrated super-concrete which has three times as high rigidity as conventional high-strength concrete, has a strong durability of a triple mesh without voids, and has no cracks and is resistant to external impact and abrasion, It is excellent in drying shrinkage and crack prevention.

Particularly, the resin mortar according to the present invention has a molecular bonding structure of at least 98% in molecular reactivity and has a triple mesh structure free of voids to realize ultrahigh strength, abrasion resistance and watertightness, and has a compressive strength of 80 MPa, a tensile strength of 6.22 MPa, It is a high strength material of Mpa.

Fourth, the present invention is a high-performance, long-life chemical resistant and durable (watertight) material.

In other words, the present invention is advantageous in preventing chloride attack on road facilities because there is no alkali aggregate reaction due to no reaction with calcium chloride, and there is no chemical reaction even with strong acid such as sulfuric acid, and is advantageous for sewage treatment plant, wastewater treatment plant, sewer pipe repair, It has a perfect watertightness that water can not permeate because there is no pore. It is advantageous for structures acting like bridges by suppressing impact, vibration absorption and cracking due to elasticity of elastic resin, It is strong against ultraviolet rays and has a strong resistance to abrasion due to weathering.

Fifth, the present invention is a high-performance, long-life, high-adhesion material.

The resin mortar according to the present invention has an excellent adhesion to other structures as well as the maintenance and reinforcement of the section of the concrete structure, so that there is no come off or exfoliation after the construction (adhesion strength: 21.6 kgf / Lt; 3 >).

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a process diagram showing a repair process of a concrete structure using a resin mortar according to the present invention;
2 is a process diagram showing a process of recovering a section of a concrete structure using resin mortar according to the present invention.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

[Surface finish]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a process diagram showing a repair process of a concrete structure using a resin mortar according to the present invention. FIG.

As shown in this figure, the method of repairing a concrete structure using resin mortar according to the present invention comprises: chipping a surface of a concrete structure; High pressure cleaning of the chipping portion of the concrete structure; Applying a sphere reinforcing agent to the surface of the high pressure cleaned concrete structure; And applying a primer coating agent to the surface of the spherical reinforcing agent.

That is, the surface repair method of concrete structures using the resin mortar according to the present invention is to repair the surface of the concrete structure by sequentially performing the chipping step of the concrete structure, the high pressure washing step, the step of applying the concrete reinforcing agent, and the step of applying the primer coating agent.

Here, the step of chipping the concrete structure chipping the surface of the concrete structure.

That is, the chipping of the concrete structure is minimized by the pneumatic type hammer, not the hydraulic hammer, and the impact on the existing concrete structure should be minimized. In order to improve the bonding force, (Breaking) and grinding of the surface of the grinder are mixed with the chipping (shearing and pecking) to apply the new and old concrete joint.

The high pressure cleaning step then cleans the chipping portion of the concrete structure with a cold / hot water high pressure washer.

Subsequently, the step of applying the spherical reinforcing agent is performed by applying a spherical reinforcing agent composed of a silicate to the deteriorated portion of the high-pressure washed concrete structure.

Wherein the silicate is a generic term for neutral salts in which the hydrogen of various silicic acids is replaced with metal atoms and wherein the one or more silicon center atoms are surrounded by a negatively charged ligand.

And is represented by the general formula xM ^I ₂ O ySiO ₂ (M is a monovalent metal). It is produced in large quantities in the natural world and occupies most of the crust as the main component of the ammonite mineral, and exists in other bodies. Aluminum salts, iron salts, calcium salts, magnesium salts and alkali salts are the most common.

In general, the melting point is low, and when the dissolved one is cooled, it is easy to form the glass. It is not soluble in acids and alkalis, but it is decomposed by fluoric acid.

Structurally, the tetrahedron of [SiO ₄ ] ^4- is a unit, which is regularly arranged, and cations enter into the gap to form crystals.

The silicon cations are strongly bound to four oxygen atoms.

The strong bonds they make are mostly covalent bonds. Within the silicate anion, oxygen is arranged in four spherical forms to occupy the narrowest space.

The four oxygen atoms are arranged at the corners of the tetrahedron, and the relatively small silicon cations are located in the center of the tetrahedron formed by oxygen, so that the silicate is in the form of tetrahedron. Silicates are characterized by their high ionic stability.

Silicates are frequently used in everyday life, and glass, refractory, cement, ceramics, etc., which are the subjects of ceramics, all use the specificity of silicates.

Particularly, it is preferable to add 25 wt% of water to 75 wt% of silicate.

Then, in the step of applying the primer coating agent, a primer coating agent composed of 80% by weight of resin mortar and 20% by weight of latex powder is applied to the surface of the spherical reinforcing agent.

Here, the resin mortar is composed of (a) a urethane acrylate resin as a first binder resin, (b) a binder resin constituting a polymethylmethacrylate resin as a second binder resin, and (c) a filler, The mixing ratio of the urethane acrylate resin and the polymethyl methacrylate resin is in the range of 10 to 60: 90 to 40, and the filler is composed of calcium carbonate, talc or both.

That is, the resin mortar is composed of a binder resin, sand, and a filler.

Here, the binder resin is composed of a urethane acrylate resin as a first binder resin and a polymethylmethacrylate resin as a second binder resin, and the mixing ratio of the urethane acrylate resin and the polymethylmethacrylate resin is 10 to 60 : 90 to 40 weight ratio. Hydroxyethyl methacrylate (HEMA) resin is added to the binder resin as a third binder resin.

That is, the urethane acrylate resin can impart durability to a spherical reinforcing agent formed of resin mortar.

The urethane acrylate resin is a hybrid resin having both urethane and acrylate characteristics.

These urethane acrylate resins are generally prepared by polymerization of a urethane prepolymer with a hydroxyalkyl acrylate.

The urethane prepolymer is formed by a polymerization reaction of a polyol and isocyanate, and the types thereof are various.

Examples of the hydroxyalkyl acrylate include methyl methacrylate, 2-hydroxyethylmethacrylate, n-butyl acrylate, and the like.

The content of the binder resin including the urethane acrylate resin and the polymethyl methacrylate resin is preferably in the range of about 20 to 60 parts by weight based on 100 parts by weight of the resin mortar composition.

If the content of the binder resin is less than 20 parts by weight, the sand particles can not be bonded properly due to insufficient mixing with the sand. If the content of the binder resin exceeds 60 parts by weight, bleeding may occur after curing.

In the resin mortar described above, in addition to the urethane acrylate resin as the first binder resin, a polymethyl methacrylate resin may be used as the second binder resin.

At this time, the blending ratio of the urethane acrylate resin as the first binder resin and the polymethylmethacrylate resin as the second binder resin is preferably about 10 to 60: 90 to 40, but is not limited thereto .

By mixing polymethyl methacrylate with urethane acrylate, the strength of the concrete structure filled with the resin mortar can be improved.

In addition, in the resin mortar, in addition to the urethane acrylate resin and the polymethyl methacrylate resin, a hydroxyl ethyl methacrylate (HEMA) resin may be additionally used as the third binder resin for reinforcing the strength of the concrete structure .

The sand may be composed of two or more kinds of sand having different particle diameters, or the sand may be composed of sand having a particle diameter in the range of 0.2 mm to 0.4 mm, sand having a particle diameter in the range of 0.4 mm to 0.8 mm, do.

In particular, the sand includes saline, and the salt content is 1 to 20 parts by weight based on 100 parts by weight of the sand.

That is, the sand may affect the workability in the field work of the resin mortar according to the particle size or the roughness of the sand particles. Therefore, the sand having the appropriate particle size or roughness according to the surface condition of the concrete structure in which the resin mortar is used Is preferably used.

Particularly, in the present invention, it is possible to mix two or more kinds of sand having different particle diameters in order to reduce the voids between the sands as much as possible and to increase the durability by increasing the meshing phenomenon between the sands.

For example, sand having a particle diameter in the range of 0.2 mm to 0.4 mm and sand having a particle diameter in the range of 0.4 mm to 0.8 mm may be mixed at a weight ratio of 1: 1.

In addition, the sand containing salt may be used.

This is because the salt in the sand can be absorbed by the aforementioned urethane acrylate resin, so that the strength of the coating layer is not affected.

However, the content of saline in the sand is preferably in the range of 1 to 20 parts by weight based on 100 parts by weight of the sand.

In addition, the salt-containing sand can be used in the soil of the Arab and African regions (ex. UAE etc.), especially in the desert region.

In particular, Arabic soils contain silica (SiO ₂ ) and CaCO ₃ unlike domestic soils, especially silica-based soils containing much silica (SiO ₂ ).

These silica-based Arabian soils, especially desert sand, are small in size and can reduce porosity, which can increase the strength of concrete structures.

For example, the particle size of the above-described desert sand may be about 1 탆 to 1000 탆, preferably about 3 탆 to 50 탆.

In the case of such small-sized desert sand, the cost of coating the concrete structure may be reduced because few voids between the sands can be used and the cost of sand is low.

Examples of the sand include white sand, silica sand, and the like.

Among them, silica sand is preferably used.

The silica sand is composed of quartz grains and is formed by weathering of acidic rocks. Its chemical composition is mainly composed of anhydrous silica (SiO ₂ ).

If such sand is contained too much in the resin mortar, the porosity of the applied layer of the final concrete structure may increase, leading to a decrease in strength.

For this reason, it is preferable to include the sand in an amount ranging from about 10 to 78 parts by weight based on 100 parts by weight of the resin mortar, but is not limited thereto.

On the other hand, in addition to the above-mentioned sand, gravel may be further added as an additional substance.

At this time, the kind and the particle diameter of the gravel used in the present invention are not particularly limited.

However, since the particle size of the gravel is closely related to the porosity which affects the strength of the coating layer, it is preferable that the particle size is in the range of about 2 mm to 15 mm.

If the particle size of the gravel is less than 2 mm, the strength of the formed coating layer is increased but the porosity may become clogged and the permeability may become poor. If the particle size of the gravel is more than 15 mm, the permeability of the formed coating layer is increased The porosity can be increased and the strength can be reduced.

However, in order to compensate the strength of the coating layer, it is preferable to suitably mix the following fillers, for example, fine particles such as talc or calcium carbonate to appropriately reduce the voids.

On the other hand, in the resin mortar of the present invention, a filler for removing fine voids formed between the sand particles is constituted.

The filler is composed of calcium carbonate, Talc or both, and the particle diameter of the calcium carbonate is in the range of 10 to 80 mu m, and the talc has a particle diameter of 50 to 200 mu m.

By filling the microvoids with such a filler, the strength of the formed coating layer can be increased.

Such fillers include calcium carbonate and talc, such as talc.

Calcium carbonate is an ore mainly composed of CaCO ₃ , which contains about 56% of CaO _{3 and} about 44% of CO ₂ , and is composed of Al ₂ O ₃ , SiO ₂ , Fe ₂ O ₃ And a trace amount of impurities.

The calcium carbonate is classified into heavy calcium carbonate produced by simple physical processing and light calcium carbonate produced by chemical recrystallization.

Among them, heavy calcium carbonate excellent in physical properties and processability and low in cost is preferably used.

The particle size of such calcium carbonate is not particularly limited.

However, when calcium carbonate having a too large particle size is used, the gap between the sand particles can not be properly filled, and the void of the coating layer increases, so that the strength of the coating layer can be lowered.

In addition, a large amount of binder resin can be used by filling the gap with a binder resin instead of calcium carbonate, which may increase the manufacturing cost of the coating layer.

Therefore, it is appropriate to use calcium carbonate having a particle diameter in the range of about 10 mu m to 80 mu m.

Talc is a hydrated magnesium silicate having a water-molecule-containing silicon bonded to a magnesium atom, and its chemical composition is Mg ₃ Si ₄ O ₃ (OH) ₂ .

By mixing the talc with the sand, the voids existing between the sand particles can be filled with talc, so that the strength of the coated layer can be increased.

The particle size of the talc is not particularly limited, but it is preferable to use a talc having a medium particle size in consideration of the strength of the coating layer. For example, it is appropriate to use talc in the range of about 50 mu m to 200 mu m.

The amount of the filler is preferably about 2 to 50 parts by weight based on 100 parts by weight of the resin mortar, but is not limited thereto.

If the content of the filler is less than 2 parts by weight, the gap between the sand particles can not be filled with the filler, so that the strength of the coating layer may be lowered.

On the other hand, when the content of the filler is more than 50 parts by weight, the voids between the sand particles may be clogged too much by the filler, resulting in poor water permeability.

In addition to the above-mentioned components, the resin mortar of the present invention may contain optional additives such as a hardening accelerator, a surface conditioner, a viscosity modifier, a thickener, an antioxidant, an ultraviolet ray inhibitor, a defoamer, a fire retardant, a fiber reinforcing material, a mineral admixture, May be further included.

These additives may be added to the resin mortar in an amount known in the art.

It is noted that the resin mortar can be produced by mixing a urethane acrylate resin as the first binder resin, a curing agent, sand and a filler.

Among these additives, the standards for high-fire chemical elements and the test results are shown in Tables 1 and 2 below.

SiO ₂

Al ₂ O ₃ + Fe ₂ O ₃
CaO + MgO
Na ₂ + K ₂ O
SO ₃
23% or more

9% or more
More than 50%
Less than 1%
Less than 6%

High fire chemical element standard (specification)

SiO ₂

Al ₂ O ₃ + Fe ₂ O ₃
CaO + MgO
Na ₂ + K ₂ O
SO ₃
25.20%

13.02%
57.67%
0.94%
1.94%

High fire chemical analysis test result (test report)

Further, the fiber reinforcing material is made of polypropylene fiber, and about 600 to 8.5 million fibers are distributed three-dimensionally in a block / mortar < 1 > m < 3 > It increases the resistance ability against various block performance inhibitors such as impact, breakage, abrasion, pitcher, corrosion and frost damage, thereby enhancing the quality of the block as a whole.

material

Polypropyline
importance

0.91
Tensile Strength (Mpa)

300 or more
Tensile elongation (%)

25 or less
Elastic modulus (Mpa)

More than 3,000
Melting point (캜)

160 ℃ or more
Acid resistance

Very high (inert)
Alkali resistance

Very high (inert)

Physical Properties of Fiber Reinforcement

In addition, blast furnace slag and silica fume are used as mineral admixtures to replace dense blocks with high functionality (high tensile strength, high durability, high flowability), and they are used at a weight ratio of 20% and 5% of the block mixture.

Specific surface area
(Cm < 2 > / g)

importance

Activity index

Chemical composition (%)
7 days
28th
91 days

SiO ₂
Al ₂ O ₃
Fe ₂ O ₃
CaO
MgO
SO ₃

LOI
5962
2.91
115
137
142
34.81
16.19
0.47

41.25
8.05
0.16
0.32

Physical and Chemical Properties of Blast Furnace Slag

Wetting amount
(%)

Specific surface area
(Cm < 2 > / g)

importance

Chemical composition (%)

SiO ₂

C
Fe ₂ O ₃
Al ₂ O ₃
Na ₂ O ₃
K ₂ O
MgO
0.1

20,000
2.05
92
1.2
2.4
1.3
0.1
1.2
0.4

Physical and chemical properties of silica fume

color

chief ingredient
Solid content (%)
pH
importance
% Reduction rate
Bleeding amount ratio (%)
bitumen

naphthalene
Sulfonate system

40 ± 2
7.0 ± 1.0
1.20 0.02
23
51

Physical Properties of High Performance Water Reducing Agent

Meanwhile, 35 to 40% by weight of granulated stone sludge is added to 100% by weight of the resin mortar.

Here, the granite sludge mentioned above is a mixture of water generated in the granulated powder and 6000 cm 2 / g or more of the granulated powder.

In particular, the granite is composed of quartz, mica, and feldspar (Na ₂ O, Al ₂ O ₃ , 6SiO ₂ ). The biotite in the mica is radiated and the feldspar is very strong.

Spread more than 10m. Feldspar _{(Na 2 O, Al 2 O} 3, 6SiO 2) is a Streptococcus tetrahedron, which is a Si tetrahedron and Al tetrahedra, there is a Na ion of one equivalent of coupling for each of Al ions, these bases are crushed mineral It becomes a time substitution property.

Therefore, when the feldspar is pulverized, the amount of base substitution is increased, and when the pulverization is carried out by wet pulverization, it is discharged into water. Feldspar is different from ordinary silica sand or silica.

In the case of silica sand, the content of SiO ₂ is 90 ± 5% and the content of Al ₂ O ₃ is less than 5%. On the other hand, feldspar has a SiO ₂ content of 75~85% and an Al ₂ O ₃ content of 15~25% (Cement) is mixed with a binder (cement) to increase the initial strength and to reduce the drying shrinkage due to the expandability of the feldspar, as well as to significantly reduce the occurrence of cracks .

Particularly, the granite sludge obtained from the process of quarrying and granulating the granite waste granite and granite from the waste stone and stone sludge produced in the process of granulating the granite or from the process of quarrying the granite is precipitated (precipitation coagulant: , Solid Al ₂ O ₃ (17%)) and dried in the form of a cake.

[Recover one side]

FIG. 2 is a process diagram illustrating a process of repairing a section of a concrete structure using resin mortar according to the present invention.

As shown in this figure, the method of recovering a section of a concrete structure using resin mortar according to the present invention comprises: chipping a deteriorated portion of a concrete structure; Removing the rust of the reinforcing bar of the deteriorated portion; Washing the rust removal portion of the reinforcing bar at a high pressure; Applying a sphere reinforcing agent to the deteriorated portion of the high pressure cleaned concrete structure; Applying a primer coating agent to the surface of the spherical reinforcing agent; Applying a cross-sectional restorative to the surface of the primer coating; And applying a primer coating agent to the surface of the cross-sectional restorative material.

That is, the method of recovering a section of a concrete structure using the resin mortar according to the present invention includes a step of chipping a concrete structure, a step of removing a reinforcing bar, a step of high pressure washing, a step of applying a spherical reinforcing agent, a step of applying a primer coating, To restore the section of the concrete structure.

Here, the chipping step of the concrete structure chipping the deteriorated portion of the concrete structure.

In other words, the deterioration part of the concrete structure should minimize the impact on the existing concrete structure by the pneumatic hammer, not the hydraulic hammer, and it is necessary to minimize the impact on the existing concrete structure and to improve the bonding force, Breaking: Breaking) and grinding of the surface of the grinder are mixed with chipping (cutting and peeling).

Next, after the deteriorated portion of the concrete structure is chipped, the rust of the reinforced portion of the chipped portion of the deteriorated portion is removed by using a wire brush, sand blast, liquid honing, barrel polishing or the like, or by pickling, electrolytic pickling, chemical polishing, Electrolytic polishing or the like is used to remove it.

The high pressure cleaning step then rinses the rust removal and chipping portions of the concrete structure with a cold / hot water high pressure washer.

Structurally, the tetrahedron of [SiO ₄ ] ^4- is a unit, which is regularly arranged, and cations enter into the gap to form crystals. The silicon cations are strongly bound to four oxygen atoms. The strong bonds they make are mostly covalent bonds. Within the silicate anion, oxygen is arranged in four spherical forms to occupy the narrowest space. The four oxygen atoms are arranged at the corners of the tetrahedron, and the relatively small silicon cations are located in the center of the tetrahedron formed by oxygen, so that the silicate is in the form of tetrahedron. Silicates are characterized by their high ionic stability. Silicates are frequently used in everyday life, and glass, refractory, cement, ceramics, etc., which are the subjects of ceramics, all use the specificity of silicates.

Particularly, it is preferable to add 25 wt% of water to 75 wt% of silicate.

That is, the resin mortar is composed of a binder resin, sand, and a filler.

In addition, the sand containing salt may be used.

Especially, Arabic soil contains SiO ₂ and CaCO ₃ unlike domestic soil, especially silica-based soil containing a large amount of SiO ₂ .

For example, the particle size of the above-described desert sand may be about 1 탆 to 1000 탆, preferably about 3 탆 to 50 탆. In the case of such small-sized desert sand, the cost of coating the concrete structure may be reduced because few voids between the sands can be used and the cost of sand is low.

Examples of the sand include white sand, silica sand, and the like.

Among them, silica sand is preferably used.

The silica sand is composed of quartz grains and is formed by weathering of acidic rocks. Its chemical composition is mainly composed of silicic anhydride (anhydrous silicic acid) SiO ₂ .

Such fillers include calcium carbonate and talc, such as talc.

The particle size of such calcium carbonate is not particularly limited. However, when calcium carbonate having a too large particle size is used, the gap between the sand particles can not be properly filled, and the void of the coating layer increases, so that the strength of the coating layer can be lowered.

These additives may be added to the resin mortar in an amount known in the art.

In particular, in the resin mortar according to the present invention, a curing accelerator may be added to promote the curing of the binder resin and the curing agent to improve the compactness of the resin mortar.

As the curing accelerator, dimethyl acetamide (DMA) or the like may be used.

The curing accelerator may be included in an amount of about 4 × 10 ^-4 to about 10 × 10 ^-4 parts by weight based on 100 parts by weight of the urethane acrylate resin.

If the amount of the curing accelerator is too small, the curing of the resin mortar becomes insufficient depending on the working conditions and the physical properties of the resin mortar can not be maintained. If the content is too large, the curing of the resin mortar occurs too rapidly, Shrinkage may occur.

The urethane acrylate resin composed of the above-described components can be produced by a conventional method known in the art.

For example, the urethane acrylate resin can be produced by mixing a urethane acrylate resin as the first binder resin, a curing agent, sand and a filler.

And, to make dense blocks of high functionality (high tensile strength, high durability, high flowability), blast furnace slag and silica fume are used as mineral admixture and substitution of 20% and 5% weight ratio of block mixture is used.

The resin mortar made of the above-mentioned components can be produced by a conventional method known in the art.

For example, it is found that the resin mortar can be produced by mixing urethane acrylate resin, sand and filler, which are the first binder resin.

The step of applying the cross-sectional restorative agent may further comprise a step of applying 40 to 60% by weight of silica sand, 10 to 25% by weight of calcium sulfoaluminate (CSA), 10 to 25% by weight of Portland cement (OPC) 0.1 to 5% by weight of a curing retarder, 0.05 to 5% by weight of a curing retarder, 0.5 to 10% by weight of an acrylic resin, and 2 to 10% by weight of an elastic resin.

That is, the above-mentioned cross-sectional restorer is composed of silica sand, Calcium Sulfo Aluminate (CSA), Portland Cement (OPC), a fluidizing agent, a hardening retarder, an acrylic resin and an elastic resin.

Here, the silica sand serves as a filler in the cross-sectional restorative material, and the grain size is not limited, but silica sand and silica sand are mixed. When the amount of the curing agent is less than 40% by weight, the effect of suppressing the shrinkage of the curing agent is insignificant and the amount of drying shrinkage can be increased, and it is uneconomical. The amount of the filler may be excessive and the fluidity and the workability may be deteriorated.

The calcium sulfoaluminate (CSA) is used in an amount of 10 to 25% by weight as an Al ₂ O ₃ component. When the calcium sulfoaluminate (CSA) is used in an amount exceeding 25% by weight, it is difficult to secure the working time owing to rapid condensation. When less than 10% by weight is used, the strength of the calcium sulfoaluminate (CSA)

The above-mentioned portland cement (OPC) is prepared by mixing the calcareous raw material and the clayey raw material in an appropriate ratio, finely pulverizing and calcining the clinker at about 1,450 ° C, and adding gypsum as a coagulation controlling agent to obtain fine lime. And anhydrous gypsum, and forms pozzolan and ettringite reactions to stabilize and stabilize the soft ground. The hydrate formed in this way exhibits high strength properties, and it is preferable to use one kind of ordinary portland cement having a powder particle size of about 3,500 to 4,200 cm < 2 > / g, preferably 10 to 25% by weight.

The fluidizing agent is used for increasing the fluidity of the cross-sectional restorative agent. For example, it may be one or more selected from the group consisting of naphthalenesulfonate type, melamine sulfonate type and polycarboxylic acid type, and is in the range of 0.15 to 5 wt% use.

The hardening retarder is for preventing rapid curing of the mixture of the cross-sectional restorative agent and includes sodium citrate, citric acid, potassium tartrate, sodium tartrate, and the like. Particularly, it is preferable to use 0.05 to 5% by weight of the above-mentioned sodium citrate.

In addition, the acrylic resin is used for improving the strength and durability of the cross-sectional restorative agent. The acrylic resin is used in an amount of 0.5 to 10 wt%. If the content of the acrylic resin is less than 0.5% by weight, the effect of improving the strength and durability may be deteriorated. If the content of the acrylic resin exceeds 10% by weight, the effect of improving the strength and durability is excellent but not economical.

The elastic resin is added to improve the chemical resistance and antibacterial property of the cross-sectional restorative agent, and it is preferable that the elastic resin includes 2 to 10% by weight in the cross-sectional restorative agent.

Subsequently, the step of applying the primer coating agent applies a primer coating agent to the surface of the cross-sectional restorative material.

Herein, since the primer coating agent has already been described in the step of applying the surface strengthening agent, the further explanation is omitted.

On the other hand, the photocatalyst is applied to the surface of the concrete structure as described above to a certain thickness.

The photocatalyst is titanium dioxide (TiO ₂ ) sol (TiO ₂ ) prepared from titanium isopropoxide {Ti [OCH (CH ₃ ) ₂ ] ₄ } and isopropyl alcohol [(CH ₃ ) ₂ CHOH] 0.57 mol / L of silica prepared from tetraethyl orthosilicate tetraethoxysilane (C ₈ H ₂ O ₄ Si) and isopropyl alcohol [(CH ₃ ) ₂ CHOH] (SiO ₂ ) and 0.5 mol / l of zinc oxide (ZnO) sol prepared from zinc acetate [Zn (C ₂ H ₃ O ₂ ) ₂ ] and silver (Ag) compared to titanium dioxide _{(TiO 2) sol, SiO 2} sol, zinc (ZnO) sol and silver (Ag) it is made of a composite processing an aqueous solution or powder form as a solution, compared to titanium dioxide this weight oxide (TiO ₂₎ sol 50%, 40% of SiO ₂ sol and 9% of zinc oxide (ZnO) sol and 1% of at least one metal ion selected from silver (Ag), zinc (Zn) and copper (Cu).

The photocatalyst having the above-described structure has the function of decomposing / removing the contaminants and NOx, SOx, and odor gas attached to the concrete structure by the photochemical reaction of the photocatalyst and sterilizing the microorganisms .

That is, the above-mentioned photocatalyst is formed by forming titanium dioxide (TiO ₂ ) ultrafine particles having excellent photocatalytic activity and supporting at least one metal ion among silver (Ag), zinc (Zn) and copper (Cu) The electrons excited by the conduction band and excited by the conduction band are prevented from recombining within a short time to the holes of the valence band to maximize the active point of the photochemical reaction so that the photochemical reaction is sufficient at a small amount of ultraviolet energy The deodorizing effect, the protective effect and the germicidal effect can be manifested by the decomposition of the malodor substance by the metal ion and the sterilizing mechanism of the microorganism.

As described above, the surface repair and section repair method of the concrete structure using the resin mortar according to the present invention is an eco-friendly material which uses the minimum amount of cement, has the effect of purifying the water of antibacterial property, and is a natural- , Non-toxic and harmless resin ceramics material has negative ion generation effect.

The present invention can adjust the curing speed according to the maintenance position of the concrete structure, can easily form the resin mortar, and is easy to repair and rework, can be installed at the temperature of -5 ° C to + 50 ° C, It can be applied to meet the requirements of.

In addition, the present invention is an integrated superconcrete which has three times the ultrahigh stiffness of a conventional high strength concrete, has a strong durability of a triple mesh without voids, and is free from cracks. It is strong in abrasion resistant against external impact and abrasion, It is excellent in drying shrinkage and crack prevention.

The present invention is a high-performance, long-life chemical resistant and durable (watertight) material.

In addition, the present invention is excellent in adhesion to other structures as well as maintenance and reinforcement of a concrete structure, thereby preventing the occurrence of Come off or exfoliation after application (adhesion strength: 21.6 kgf / cm3) .

The preferred embodiments described in the specification of the present invention are intended to be illustrative, not limiting, and the scope of the present invention is indicated by the appended claims, and all modifications that come within the meaning of the claims are included in the present invention. .

A: Surface repair B: Sectional restoration

Claims

Chipping the surface of the concrete structure; High pressure cleaning of the chipping portion of the concrete structure; Applying a sphere reinforcing agent to the surface of the high pressure cleaned concrete structure; Wherein the primer coating agent is composed of 80% by weight of resin mortar and 20% by weight of latex powder, and the resin mortar is a mixture of (a) A binder resin constituting a urethane acrylate resin as a first binder resin and a polymethylmethacrylate resin as a second binder resin, (b) sand, and (c) a filler, wherein the urethane acrylate resin and polymethylmethacrylate Wherein the resin is mixed with a binder resin in a ratio of 10 to 60:90 to 40 parts by weight and the filler is composed of calcium carbonate, talc or both, and the resin mortar is mixed with hydroxyethyl methacrylate (Hydroxy ethyl methacrylate, HEMA) resin, and the sand is composed of two or more types of sand having different particle sizes Or the sand is composed of sand having a particle diameter in the range of 0.2 mm to 0.4 mm, sand having a particle diameter in the range of 0.4 mm to 0.8 mm, or a mixture thereof, wherein the sand contains saline, And 1 to 20 parts by weight based on 100 parts by weight of the resin mortar. The gravel is added to the resin mortar, and the gravel has a particle diameter ranging from 2 mm to 15 mm. The particle diameter of the calcium carbonate is in a range of 10 to 80 μm Ti [OCH (CH ₃ ) ₂ ] ₄ } and isopropyl alcohol (Ti [OCH (CH ₃ ) ₂ ] ₄ ) are added to the surface of the primer coating agent. 0.57 mol / l of titanium dioxide (TiO ₂ ) sol prepared with isopropyl alcohol [(CH ₃ ) ₂ CHOH], tetraethyl orthosilicate tetraethoxysilane (C ₈ H ₂ O ₄ Si) manufactured by propyl alcohol _{(Isopropyl alcohol) [(CH 3} ) 2 CHOH] Silica _{(SiO 2) sol 0.44mol / ℓ} , zinc acetate (Zn acetate) [Zn (C 2 H 3 O 2) 2] a zinc oxide (ZnO) sol 0.5mol / ℓ, and silver (Ag) solution is prepared from each (TiO ₂ ) sol, silica (SiO ₂ ) sol, zinc oxide (ZnO) sol and silver (Ag) solution in the form of an aqueous solution or powder, TiO ₂₎ characterized in that the sol 50%, silica (SiO ₂₎ sol 40%, zinc oxide (ZnO) sol 9% and a silver (Ag) photocatalyst is applied a predetermined thickness consisting of a 1% ratio of an aqueous solution or powder-compound treated with Repair and Repair Method of Concrete Structures Using Resin Mortar.

Chipping the deteriorated portion of the concrete structure; Removing the rust of the reinforcing bar of the deteriorated portion; Washing the rust removal portion of the reinforcing bar at a high pressure; Applying a sphere reinforcing agent to the deteriorated portion of the high pressure cleaned concrete structure; Applying a primer coating agent to the surface of the spherical reinforcing agent; Applying a cross-sectional restorative to the surface of the primer coating; Applying a primer coating agent to the surface of the cross-sectional restorative material,
Wherein the primer coating agent is composed of 80% by weight of resin mortar and 20% by weight of latex powder, wherein the resin mortar comprises (a) a urethane acrylate resin as a first binder resin, and a urethane acrylate resin as a second binder resin (B) sand and (c) a filler constituting a polymethylmethacrylate resin, and the mixing ratio of the urethane acrylate resin and the polymethylmethacrylate resin is 10 to 60:90 to 40 Wherein the filler is composed of calcium carbonate, Talc or both, and a hydroxy ethyl methacrylate (HEMA) resin is added to the resin mortar as a third binder resin, Or a mixture of two or more kinds of sand having different particle diameters, or the sand is composed of sand having a particle diameter in the range of 0.2 mm to 0.4 mm, Wherein the sand comprises saline and the salt content is 1 to 20 parts by weight based on 100 parts by weight of the sand, adding gravel to the resin mortar, The grain size of the gravel is in the range of 2 mm to 15 mm, the grain size of the calcium carbonate is in the range of 10 μm to 80 μm, the grain size of the talc is in the range of 50 μm to 200 μm, 40 to 60% by weight of silica sand, 10 to 25% by weight of calcium sulfoaluminate, 10 to 25% by weight of Portland cement, 0.15 to 5% by weight of a fluidizing agent, 0.05 to 5% (OCH (CH ₃ ) ₂ ] ₄ ) and isopropyl alcohol (TiO 2) are added to the surface of the primer coating agent, and titanium isopropoxide _{) [(CH 3) 2 CHOH} ] a titanium dioxide (TiO ₂₎ sol made of a 0.57mol / , Seven-tetramethyl orthosilicate tetra oxy silraen _{(Tetraethyl orthosilicate Tetraethoxysilane) (C 8} H 2 0O 4 Si) and isopropyl alcohol _{(Isopropyl alcohol) [(CH 3} ) 2 CHOH] A silica (SiO ₂₎ made of a sol 0.44mol 0.5 mol / l of zinc oxide (ZnO) sol prepared from zinc acetate (Zn acetate) [Zn (C ₂ H ₃ O ₂ ) ₂ ] and silver (Ag) TiO ₂₎ sol, silica (SiO ₂₎ sol, zinc (ZnO) sol and silver (Ag) is made composite by processing an aqueous solution or powder form as a solution, compared to titanium dioxide this weight oxide (TiO ₂₎ sol 50%, of silica (SiO ₂ ) sol 40%, zinc oxide (ZnO) sol 9% and silver (Ag) 1%, or a powdered photocatalyst is applied to a certain thickness. Repair and section repair method.

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