KR101602892B1 - Expansion joints using the resin mortar repair and reinforcement method - Google Patents

Abstract

The present invention provides a method for repairing and reinforcing an expansion joint equipment part using resin mortar, which is advantageous to prevent salt damage to road facilities not responsive to calcium chloride without an alkali aggregate reaction, secures perfect watertightness as a dense polymer assembly without an air gap, suppresses generation of impact, vibration absorption, and crack due to elasticity of an elastic resin so as to be advantageous to a structure that behaves such as a bridge or the like, fundamentally prevents freezing damage by realizing perfect watertightness, is resistant to ultraviolet rays, and has strong wear resistance to weathering, by applying resin mortar to an aged portion of an expansion joint equipment part. In order to achieve the above objective, the method for repairing and reinforcing an expansion joint equipment part using resin mortar according to the present invention comprises the steps of: cutting bridge pavement where expansion joint equipment is installed; fracturing reinforced concrete of the cut portion of the pavement; cleaning the fractured portion of reinforced concrete with high-pressure water; applying a strengthening agent to the fractured portion of reinforced concrete cleaned with the high-pressure water; applying resin mortar to a surface of the strengthening agent; and applying a primer coating agent to a surface of the resin mortar.

Description

BACKGROUND OF THE INVENTION Field of the Invention [0001] The present invention relates to a method for repairing and repairing sound field dents using a resin mortar,

More particularly, the present invention relates to a method of repairing and reinforcing an expansion joint using a resin mortar for applying resin mortar to an aged portion of an expansion joint.

Generally, the expansion joint provided in the clearance spaces of the slab and the slab is installed in the discontinuity part of the bridge, and when the temperature changes, the shrinkage and expansion of the bridge overhead structure, the rotation and movement by the live load during the vehicle passing, And the shrinkage of the bridge due to the shrinkage of the bridges, compensates the bridges to ensure the running characteristics of the vehicle, and prevents water from entering into the lower structure. It is important for the durability of the entire bridge It is a major part of the bridge that plays the role.

Before the development of the steel type in the past, almost all of the expansion joints were used as rubber type. Since the steel type expansion joint device was introduced in the 90s, recently, the steel type expansion joint with superior durability In the case of small bridges with small elongation, rubber type expansion joints are still applied.

As shown in FIG. 1, a conventional bridge expansion joint device is shown using a stretch joint 30 for connecting a bridge slab 10 having a predetermined clearance space to an adjacent slab 20, A plurality of reinforcing steel pieces 32 are embedded in the joint 30 to be seated on the fixture after concrete 40 and 50 provided at the corresponding ends of the bridge slab 10 and the adjacent slab 20, The both ends are tightly fixed by the anchor bolts 60 protruding upward from the later-type concrete 40, 50.

The expansion joint device thus installed frequently wears and breaks the rubber, and has a short life span due to frequent maintenance, so that it is being replaced with another joint member. In this replacement process, the existing joint joint / Since the repairing time from the dismantling of the slab to the installation of the expansion joint device and the curing of the concrete requires a long period of time, it causes traffic disruption, which causes enormous economic loss and inconvenience.

Registration No. 10-0427908 (Apr. 4, 2004)

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to solve the above-mentioned problems, and it is an object of the present invention to provide a method and apparatus for coating a resin mortar on an aged portion of an expansion joint device, It is a compact polymer combination that ensures perfect watertightness that can not penetrate water because there is no pore. It is advantageous for structures that behave like bridges by suppressing shock, vibration absorption and cracking due to elasticity of elastic resin resin. It is an object of the present invention to provide a method for repairing and reinforcing a sound reinforcement using resin mortar which is resistant to ultraviolet rays and has high wear resistance due to weathering.

In order to accomplish the above object, there is provided a method of repairing and reinforcing a sound expansion joint using a resin mortar according to the present invention, comprising the steps of: cutting a bridge package installed with an expansion joint; Crushing a portion of the reinforced concrete in which the package is cut; Washing the crushed concrete portion with high-pressure water; Applying a sphere reinforcing agent to the crushed concrete crushing area washed with the high-pressure water; Applying resin mortar to the surface of the sphere reinforcing agent; Applying a primer coating agent to the surface of the resin mortar; 0.57 mol / l TiO2 sol (sol) prepared from Ti [OCH (Cl3) 2] 4 and (CH3) 2 CHOH on the surface of the primer coating, 0.44 mol SiO2 sol made from (C8H20O4Si) and (CH3) / l and ZnO (sol) prepared from Zn (C2H3O2) 2, 0.50 mol / l of at least one metal ion selected from the group consisting of Ag, Zn and Cu, (sol) 40%, ZnO sol 9%, and 1% or more of at least one metal ion selected from Ag, Zn, and Cu is applied to the photocatalyst at a predetermined thickness.

As described above, the repairing and reinforcing method of the expansion joint using the resin mortar according to the present invention has the following effects.

First, the present invention can adjust the curing rate during repair and reinforcement of the sound field cushion, and it is easy to mix and construct the resin mortar, easy to repair and re-work, can be installed at the temperature of -5 ° C to + 50 ° C , It can be applied to the requirements of the site.

Second, the present invention is advantageous for urgent maintenance and reinforcement work in the urban area because it is possible to control the curing time of 1 hour or 1 hour and 2 days in the expansion joint by using resin mortar as a mainstay.

Third, the present invention is an integrated super-concrete having a three-fold superhigh stiffness of a conventional high-strength concrete, a three-mesh network without porosity, a crack-free superconcrete structure, a strong abrasion resistant against external impact and abrasion, It is excellent in drying shrinkage and crack prevention.

Fourth, the present invention provides a polymer composite structure having a molecular reactivity of at least 98%, which realizes ultra-high strength, abrasion resistance and water tightness by maintaining a three-mesh network structure free from voids and has a high strength material having a compression strength of 80Mpa, a tensile strength of 6.22Mpa, and a flexural strength of 15.5Mpa to be.

Fifth, the present invention is advantageous for prevention of salt attack on road facilities because there is no alkali aggregate reaction due to no reaction with calcium chloride, and it is advantageous for sewage treatment plant, wastewater treatment plant, sewage pipe repair and the like due to no strong chemical reaction such as sulfuric acid. 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.

Sixth, the present invention has an effect of not causing maintenance and reinforcement of the expansion joint device and also adhesion to other structures, so that it does not cause come off or exfoliation after installation (adhesion strength: 21.6 kgf / ㎤ ).

1 is a perspective view showing a state in which a conventional expansion joint is installed in an oil circulation part,
FIG. 2 is a process diagram showing a process of repairing and reinforcing an expansion joint using a resin mortar according to the present invention. FIG.

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

FIG. 2 is a process diagram illustrating a process of repairing and reinforcing an expansion and contraction of a sound field using a resin mortar according to the present invention.

As shown in the figure, the method of repairing and reinforcing a stretched shrunk sound field using resin mortar according to the present invention comprises the steps of cutting a bridge package provided with an expansion joint device; Crushing a portion of the reinforced concrete in which the package is cut; Washing the crushed concrete portion with high-pressure water; Applying a sphere reinforcing agent to the crushed concrete crushing area washed with the high-pressure water; Applying resin mortar to the surface of the sphere reinforcing agent; Applying a primer coating agent to the surface of the resin mortar; 0.57 mol / l TiO2 sol (sol) prepared from Ti [OCH (Cl3) 2] 4 and (CH3) 2 CHOH on the surface of the primer coating, 0.44 mol SiO2 sol made from (C8H20O4Si) and (CH3) / l and ZnO (sol) prepared from Zn (C2H3O2) 2, 0.50 mol / l of at least one metal ion selected from the group consisting of Ag, Zn and Cu, (sol) 40%, ZnO sol 9% and 1% or more of at least one metal ion selected from Ag, Zn, and Cu to a predetermined thickness.

That is, the repairing and reinforcing method of the stretched shrunk mortar using the resin mortar according to the present invention includes the steps of cutting the pavement of the bridge, crushing the reinforced concrete, washing the high pressure water, applying the reinforcing agent, applying the resin mortar, applying the primer coating, And the application step is carried out sequentially to repair and reinforce the expansion joint.

Here, the bridge pavement cutting step cuts the bridge pavement in which the expansion joint is installed.

Subsequently, the crushing step breaks the reinforced concrete at the portion where the bridge pavement is cut.

Then, in the high-pressure water washing step, the crushed concrete portion is washed with high-pressure water.

Subsequently, the step of applying the spherical reinforcing agent is carried out by applying a spherical reinforcing agent composed of silicate to the crushed concrete crushing site washed with high-pressure water.

Here, the silicate is a generic term for neutral salts in which hydrogen of various silicates is substituted with metal atoms, and is a compound containing an anion in which 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.

Subsequently, the resin mortar applying step applies resin mortar to the surface of the spheroid strengthening 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 blending ratio of the acrylate resin and the polymethyl methacrylate resin is 10 to 60: 90 to 40 parts by weight.

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 containing 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 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 to 0.4 mm, sand having a particle diameter in the range of 0.4 to 0.8 mm, or a mixture thereof.

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 to 0.4 mm and sand having a particle diameter in the range of 0.4 to 0.8 mm may be mixed in 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.

Especially, Arabic soil contains SiO ₂ and CaCO ₃ unlike domestic soil, especially silica-based soil containing a large amount of 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 to 1000 mu m, preferably about 3 to 50 mu m. 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 .

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 appropriate 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 that affects the strength of the applied layer, it is preferable that the particle size is in the range of about 2 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, and the particle size of the talc is in the range 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 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 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.

Particularly, in the present invention, a curing accelerator may be added in order to accelerate the curing of the binder resin and the curing agent to improve the density of the coating layer.

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.

The standards and test results of the above-mentioned high-fire chemical elements 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

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.

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.

Next, in the step of applying the primer coating agent, a primer coating agent composed of 80 wt% of resin mortar and 20 wt% of latex powder is applied on the surface of the resin mortar.

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

The photocatalyst was prepared by dissolving 0.57 mol / L TiO2 sol prepared from Ti [OCH (Cl3) 2] 4 and (CH3) 2 CHOH, 0.44 mol / L SiO2 sol prepared from C8H20O4Si and (CH3) , At least one metal ion selected from Ag, Zn, and Cu was supported on 0.50 mol / l of a ZnO sol prepared from Zn (C2H3O2) 2, and 50% of a TiO2 sol, ) 40%, 9% ZnO sol (sol) and 1% or more of at least one metal ion selected from Ag, Zn, and Cu.

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

That is, the above-mentioned photocatalyst forms titanium dioxide (TiO2) ultrafine particles having excellent photocatalytic activity and supports at least one of metal ions of Ag, Zn, and Cu, thereby being excited in the valence band by irradiation of ultraviolet rays, The photochemical reaction is sufficient at a small amount of ultraviolet energy by suppressing the recombination of electrons in the electron hole in the earliest time in the valence band and maximizing the active point of the photochemical reaction. The deodorizing effect, the protective effect, and the sterilizing effect can be further exerted by the sterilization mechanism.

As described above, the repairing and reinforcing method of the expansion joint using the resin mortar according to the present invention is capable of controlling the curing rate during repair and reinforcement of the sound field dent, and is convenient for the resin mortar mixing and construction, It is easy to re-work and it is possible to install in the season of -5 ℃ ~ + 50 ℃.

Further, according to the present invention, curing time of one hour or one hour and two days can be adjusted in the expansion joint by using resin mortar as a main material.

The present invention relates to a super-rigid three-fold superstructure of a conventional high-strength concrete, a three-ply net having no durability, a crack-free integral super-concrete, a strong abrasion resistant against external impact and abrasion, Excellent shrinkage and crack prevention.

The present invention also provides a polymer composite structure having a molecular reactivity of at least 98%, which realizes an ultra-high strength, abrasion resistance and water tightness by maintaining a three-mesh network structure free from voids and has a high compressive strength of 80 MPa, a high tensile strength of 6.22 MPa and a flexural strength of 15.5 MPa to be.

Further, the present invention is advantageous for prevention of 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, sewage pipe repair, And the elasticity of the elastic resin suppresses the impact, vibration absorption and cracking due to the elasticity of the elastic resin. Therefore, it is advantageous for a structure that behaves like a bridge, and by realizing the complete waterproofing, And has a strong resistance to abrasion due to weathering.

In addition, the present invention has an effect that it is excellent in adhesion and adhesion to other structures as well as maintenance and reinforcement of the expansion joint device, so that there is no come off or exfoliation after installation (adhesion strength: 21.6 kgf / ㎤ ).

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: Repairing and strengthening method of sound expansion joints using resin mortar

Claims (11)

Cutting the bridge package with the expansion joint;
Crushing a portion of the reinforced concrete in which the package is cut;
Washing the crushed concrete portion with high-pressure water;
Applying a sphere reinforcing agent to the crushed concrete crushing area washed with the high-pressure water;
Applying resin mortar to the surface of the sphere reinforcing agent;
Applying a primer coating agent to the surface of the resin mortar;
0.57 mol / l TiO2 sol (sol) prepared from Ti [OCH (Cl3) 2] 4 and (CH3) 2 CHOH on the surface of the primer coating, 0.44 mol SiO2 sol made from (C8H20O4Si) and (CH3) / l and ZnO (sol) prepared from Zn (C2H3O2) 2, 0.50 mol / l of at least one metal ion selected from the group consisting of Ag, Zn and Cu, a step of applying a photocatalyst having a composite treatment of 40% of sol (sol), 9% of ZnO sol (sol) and 1% of at least one metal ion selected from Ag, Zn and Cu to a certain thickness. Repair and Reinforcement Method of New Construction of Sound Field Chamber. The method according to claim 1,
Wherein said concrete reinforcing agent is composed of silicate. The method according to claim 1,
Wherein the primer coating agent is composed of 80% by weight of resin mortar and 20% by weight of latex powder. The method according to claim 1 or 3,
The resin mortar comprises (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, wherein the urethane acrylate Wherein the mixing ratio of the resin to the polymethyl methacrylate 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. Repair and Reinforcement Methods for Sound Field Chambers. 5. The method of claim 4,
And a third binder resin is added to the resin mortar with a hydroxy ethyl methacrylate (HEMA) resin. 5. The method of claim 4,
Wherein the sand is composed of 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 to 0.4 mm, sand having a particle diameter in the range of 0.4 to 0.8 mm, Repair and Reinforcement Method of New Construction of Sound Field Chamber using Resin Mortar. The method according to claim 6,
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. 5. The method of claim 4,
Wherein the gravel is added to the resin mortar and the particle size of the gravel is in the range of 2 to 15 mm. 5. The method of claim 4,
Wherein the calcium carbonate has a particle diameter in the range of 10 to 80 mu m. 5. The method of claim 4,
Wherein the talc has a particle diameter ranging from 50 to 200 mu m.

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