KR101634367B1 - Concrete waterproofing method using resin mortar - Google Patents

Concrete waterproofing method using resin mortar Download PDF

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KR101634367B1
KR101634367B1 KR1020150089955A KR20150089955A KR101634367B1 KR 101634367 B1 KR101634367 B1 KR 101634367B1 KR 1020150089955 A KR1020150089955 A KR 1020150089955A KR 20150089955 A KR20150089955 A KR 20150089955A KR 101634367 B1 KR101634367 B1 KR 101634367B1
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resin
weight
sand
mortar
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이은숙
이영회
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이은숙
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    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62Insulation or other protection; Elements or use of specified material therefor
    • E04B1/64Insulation or other protection; Elements or use of specified material therefor for making damp-proof; Protection against corrosion
    • E04B1/644Damp-proof courses
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04DROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
    • E04D11/00Roof covering, as far as not restricted to features covered by only one of groups E04D1/00 - E04D9/00; Roof covering in ways not provided for by groups E04D1/00 - E04D9/00, e.g. built-up roofs, elevated load-supporting roof coverings
    • E04D11/02Build-up roofs, i.e. consisting of two or more layers bonded together in situ, at least one of the layers being of watertight composition

Abstract

The purpose of the present invention is to provide a concrete waterproofing method using resin mortar. The concrete waterproofing method using resin mortar is easily constructed and has excellent waterproofing performance. To achieve the purpose, according to the present invention, the concrete waterproofing method using resin mortar comprises: a step of processing and cleaning a surface of a concrete structure; a step of applying a primer coating on the surface of the concrete structure; a step of installing glass fiber on the primer coating; a step of mixing a motor resin and a cross section restoring agent to be applied on the surface of the primer coating; a step of applying the primer coating on the surface; and a step of applying a photocatalyst on the surface of the primer coating.

Description

{Concrete waterproofing method using resin mortar}

The present invention relates to a waterproofing method for concrete structures using resin mortars. Specifically, the present invention relates to a concrete waterproofing method using resin mortar. Specifically, a primer coating agent is applied to a concrete structure in an amorphous form, To a concrete structure waterproofing method using resin mortar.

In general, waterproofing works are performed to form a waterproof layer on the surface of the structure in order to prevent moisture from penetrating into the interior of the building, such as a roof, a floor, and an underground parking lot.

This type of waterproofing can be divided into roof, interior, water birds and underground waterproofing in buildings, and in case of roof waterproofing, asphalt waterproofing, sheet waterproofing, urethane waterproofing and rubber asphalt waterproofing have been applied.

In the conventional waterproofing method, a waterproofing liquid is added to the concrete in the process of aging the concrete, and then a roof is formed, or a waterproofing liquid is used for laminating and then finishing using a sheet or the like.

 However, even after such a waterproofing construction, corrosion of concrete due to lack of maintenance after completion of construction and problems such as leakage occur, and the problem is being researched.

Leakage is the first signal to notify the performance degradation of the structure, and it is also the main cause of inconvenience in the use of residential life and facilities.

The repair cost due to the leakage is 2 ~ 3 times the initial construction cost but it is difficult to repair the leak completely, and the leakage and leakage are repeated over time. have.

The conventional waterproofing method is divided into an exposure waterproofing method and an unexposed waterproofing method. Among them, the most commonly used waterproofing method is a waterproofing method using a polyurethane waterproofing material having excellent elasticity and elongation and a sheet waterproofing method using a sheet.

Specifically, the method used in the exposure waterproofing method is as follows.

First, elastic urethane coating waterproofing method

Second, soft epoxy coating waterproofing method

Third, inorganic elastic film waterproofing method

Fourth, rubberized asphalt coating waterproofing method

Fifth, rubber film coating waterproofing method

Sixth, there is a composite sheet waterproofing method.

First, elastic urethane 3mm thick coating waterproofing method is the most widely used construction method. It has elasticity and excellent elongation, so that even when cracks occur in the concrete, the waterproof layer is excellent in water resistance because there is no crack.

However, since the urethane coating waterproofing method has good waterproof property when a coating film having a thickness of 3 mm or more is formed, the water penetrates into the water due to the permeability and permeability of the urethane when the waterproof layer is less than 3 mm, The problem of water penetration can be solved.

Secondly, the soft epoxy waterproofing method is excellent in waterproof property even though it has good waterproofing property even though it is coated once. However, since it is aged with ultraviolet rays, it is impossible to waterproof the outdoor space and it is widely used for waterproofing of basement, drinking water and water tank.

Third, the inorganic elastic film waterproofing method is to mix the soft acrylic resin with the Portland cement to form a coating film about 3 mm in thickness and waterproof.

However, according to the waterproofing method, since the polymerization is released and reduced to acrylic acid at the place where the water is floated, the concrete surface is oxidized due to the neutralization reaction with the concrete, thereby causing the problem that the coating layer is peeled off from the oxide layer.

Therefore, this method is unsuitable for roof waterproofing.

Fourth, the rubberized asphalt coating waterproofing method is a method of waterproofing the asphalt by mixing rubber with water and then cementing it.

However, the rubberized asphalt coating film can not be used for external exposure and waterproofing even if it is used for internal unexposed waterproofing due to aging and cracking due to exposure to ultraviolet rays and easy generation of air pockets.

Fifth, the waterproofing method of rubber film is a method of melting rubber in solvent and synthesized with synthetic resin, and this method is also suitable for bridging and non-visible waterproofing than rooftop waterproofing because it is weak to ultraviolet rays.

Sixth, the composite sheet method is a method in which a rubberized asphalt sheet or a synthetic rubber sheet is laid on the entire surface of concrete, urethane resin is applied to the joint area, and glass fiber is bonded together. It is excellent in durability and can be secured with a waterproof layer having a uniform thickness as a whole.

However, it is difficult to apply waterproofing to complicated areas, and it is impossible to achieve complete bonding at the joints between the sheets. As a result, water leakage occurs due to cracks, and partial repair is difficult when water leakage occurs. There is a problem that the waterproof layer does not stick to the floor and is excited and the condensation phenomenon is severe and the mother body is corroded.

Particularly, the air pocket phenomenon caused by moisture evaporation in concrete is also caused by the expansion of the air layer sealed by the pinhole or mortar peeling of the surface concrete in addition to the moisture of the concrete matrix.

In addition, since the stretch concrete has a high water content and the concrete itself has an alkaline property, there is a problem that peeling may occur due to poor adhesion when an epoxy primer or a urethane primer used conventionally is used.

In other words, conventionally, there is a problem that the water content is high in the wet concrete or the winter construction on the roof-exposed waterproofing construction of the concrete building, and there is a problem that the adhesion failure due to the moisture causes the flooding, cracks or air pockets and the waterproofing film is permeated to oxidize or aging the concrete structure There is a problem that the waterproofing material promotes concrete and neutralization reaction.

Registration No. 10-1027595 (Mar. 30, 2011)

SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a method of coating a concrete structure with a primer coating agent in an amorphous form, The present invention provides a concrete structure waterproofing method using a resin mortar so as to exhibit a simple construction property, an excellent waterproof function, an excellent adhesion function, a crack resistance, and a chemical resistance waterproof effect.

In order to accomplish the above object, there is provided a concrete structure waterproofing method using resin mortar according to the present invention, comprising: treating a surface of a concrete structure with a pneumatic hammer to break concrete, chipping and grinding the surface of a grinder; And 80% by weight of resin mortar and 20% by weight of latex powder on the surface of the pretreated concrete structure, wherein the resin mortar comprises (a) urethane acrylate resin as the first binder resin and polymethylmethacrylate as the second binder resin (B) a curing agent, (c) sand, and (d) a filler, wherein the mixing ratio of the urethane acrylate resin and the polymethyl methacrylate resin is 10 to 60:90 to 40 Wherein the curing agent is composed of benzoyl peroxide 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 is added, and the sand is composed of a mixture of two or more types of sand having different particle diameters, A sand having a particle diameter in the range of 0.4 to 0.8 mm, a sand having a particle diameter in the range of 0.4 to 0.8 mm, or a mixture thereof, wherein the sand contains saline, And 20 to 20 parts by weight of a resin mortar, wherein gravel is added to the resin mortar, the gravel has a particle diameter ranging from 2 mm to 15 mm, the calcium carbonate has a particle diameter ranging from 10 to 80 μm, Applying a primer coating composition in the range of 50 mu m to 200 mu m; Installing glass fibers on the primer coating; A mortar resin composed of 30 to 80 wt% of a primer coating agent, 0.5 to 2 wt% of a dispersant, 0.5 to 2 wt% of an admixture, 0.1 to 2 wt% of a defoamer, 18.9 to 64 wt% of a latex powder, 10 to 25% by weight of calcium sulfoaluminate, 10 to 25% by weight of Portland cement (OPC), 0.15 to 5% by weight of a fluidizing agent, 0.05 to 5% by weight of a hardening retarder, 0.5 to 5% To 10% by weight of an elastic resin and 2 to 10% by weight of an elastic resin in a ratio of 1: 1; Applying a primer coating agent to the surface to which the mortar resin and the cross-sectional restorative agent are applied; 0.57 mol / l TiO2 sol prepared from Ti [OCH (Cl3) 2] 4 and (CH3) 2 CHOH on the surface of the primer coating agent, SiO2 sol 0.44 made 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 (sol) A photocatalyst which has been subjected to a combined treatment with 40% of a sol and 9% of a ZnO sol and 1% of at least one metal ion selected from Ag, Zn and Cu is applied to a certain thickness.

As described above, the concrete structure waterproofing method using the resin mortar according to the present invention has the following effects.

First, the present invention has an easy workability.

The present invention is advantageous in that the construction equipment is simple, the one-component type is simple in construction, and is a lightweight material.

In addition, since it is cured within 1 ~ 2 hours after construction, it is possible to shorten the construction period by quick waterproofing work.

In addition, the present invention ensures low temperature curing that can be performed at a temperature of -5 ° C or lower.

Second, the present invention has excellent waterproof function.

INDUSTRIAL APPLICABILITY The present invention is excellent in water resistance and weather resistance, and is free from hardening shrinkage, and is 100% waterproof.

Third, the present invention has excellent adhesion.

INDUSTRIAL APPLICABILITY The present invention can prevent damage due to weight and heat by integrally attaching a mother body and a waterproof layer.

Fourth, the present invention is resistant to bacteremia.

The present invention does not cause cracking or breakage due to external impact or the like due to the durability and strength enhancement effect of the concrete matrix.

Fifth, the present invention has chemical resistance waterproof effect.

The present invention is excellent in strong acid and strong alkali resistance, and does not react with water and calcium chloride.

Further, the present invention is a non-toxic eco-friendly product free of heavy metal components such as cadmium (Cd) and lead (Pb).

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

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

As shown in this figure, the method of waterproofing concrete structures using resin mortar according to the present invention comprises the steps of: treating and cleaning the surface of a concrete structure; Applying a primer coating agent to the surface of the ground treated concrete structure; Coating a surface of the primer coating agent with a mortar resin and a cross-linking agent at a ratio of 1: 1; And applying a primer coating agent to the surface to which the mortar resin and the cross-sectional restorative agent are applied.

That is, the concrete structure waterproofing method using the resin mortar according to the present invention waterproofs the concrete structure by sequentially performing a base treatment step, a primer coating agent application step, a mortar resin and a cross-sectional restorative agent application step, and a primer coating agent application step.

Here, the background processing step chipping and cleaning the surface of the concrete structure.

That is, the chipping of the concrete structure deteriorates the impact of the existing concrete structure by the pneumatic hammer, not the hydraulic hammer, and it is required 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 combined with chipping to allow new and old concrete joints.

Next, 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 coated on the surface of the base concrete structure of the concrete structure.

Here, the above-mentioned 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, (c) a curing agent, Wherein the mixing ratio of the urethane acrylate resin to the polymethyl methacrylate resin is in the range of 10 to 60:90 to 40, and the curing agent is composed of benzoyl peroxide, Calcium, talc, or both.

That is, the resin mortar is composed of a binder resin, a curing agent, 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.

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 curing agent can control the curing time of the urethane acrylate resin.

The curing agent is not limited to organic peroxide such as benzoyl peroxide (BPO) and the like.

In particular, the benzoyl peroxide not only cures the urethane acrylate resin well, but also thermally decomposes in the solvent to generate phenyl radicals and benzoate radicals to initiate polymerization of the urethane acrylate resin.

The curing agent controls the content of the curing agent according to the atmospheric temperature and the surface temperature. For example, it is preferable to mix a large amount in winter and a small amount in summer.

In consideration of this point, it is appropriate that the content of the curing agent is about 2 to 10 parts by weight based on 100 parts by weight of the resin mortar.

If the content of the curing agent is less than 2 parts by weight, curing may not occur properly. If the content of the curing agent is more than 10 parts by weight, the physical properties of the resin mortar to be formed may be deteriorated.

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.

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 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 .

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 size of the calcium carbonate is in the range of 10 mu m to 80 mu m, and the particle size of the talc is in the range of 50 mu m 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.

Particularly, in the present invention, a curing accelerator may be added to promote 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 content of the curing accelerator is too small, the curing of the coating layer is insufficient due to the working conditions, and the physical properties of the coating layer can not be maintained. If the content is too large, the curing of the coating layer occurs too rapidly, Shrinkage of the applied layer may occur.

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 a urethane acrylate resin as the first binder resin, a hardener, 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

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, after the application of the primer coating agent, a step of providing glass fiber thereon is added.

E-glass (for electric parts) and S-glass (for high strength) are used as the glass fiber, and a unidirectional rubbing type is used for the glass fiber.

Then, the mortar resin and the cross-sectional restorative agent are applied to the surface of the glass fiber by mixing the mortar resin and the cross-sectional restorative agent at a ratio of 1: 1.

The mortar resin is composed of 30 to 80% by weight of a primer coating agent, 0.5 to 2% by weight of a dispersant, 0.5 to 2% by weight of an admixture, 0.1 to 2% by weight of a defoaming agent, and 18.9 to 64% by weight of a latex powder.
That is, the mortar resin is composed of a primer coating agent, a dispersant, an admixture agent, a defoaming agent, and a latex powder.

delete

Here, the primer coating agent is composed of 80% by weight of resin mortar and 20% by weight of latex powder.

It is noted that the dispersant may be used in combination with sodium gluconate, neopentyl glycol and antifoaming agent, if necessary, while using the polycarboxylic acid-based dispersant alone in an amount of 0.5 to 2% by weight.

The polycarboxylic acid-based dispersing agent imparts a low viscosity to the matrix itself and significantly reduces the water cement ratio and improves the flowability by the cement dispersing action.

It is noted that the use of 0.5 to 2 wt% of the fibrous admixture as the admixture is most preferable from the viewpoint of efficacy and economy, but the amount of the admixture can be changed through repeated experiments.

The antifoaming agent is preferably used in an amount of 0.1 to 2% by weight for removing air bubbles which may be generated upon spraying the primer coating material or mixing the materials.

In addition, 20 wt% of latex powder is used.

On the other hand, the above-mentioned cross-sectional restorer comprises 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) 1 to 5 times by weight of a curing agent, 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 due to rapid condensation, and when less than 10% by weight is used, the strength is lowered due to the overexpansion reaction.

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.

When the latex is added in an amount of less than 2% by weight, various characteristics are poorly exhibited. When the latex is added in an amount of 10% by weight or more, the hydration reaction of the cement is hindered and the strength is lowered.

Then, in the step of applying the primer coating agent, a primer coating agent is applied to the surface to which the mortar resin and the cross-sectional restorative agent are mixed.

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

Then, a photocatalyst is applied to a predetermined thickness on the surface of the primer coating agent.

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 structure has the function of decomposing / removing the contaminants attached to the interlocking block, NOx, SOx, odorous gas, and the like 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 concrete structure waterproofing method using the resin mortar according to the present invention is advantageous in that the construction equipment is simple, the one-component type is simple in construction, and is a lightweight material.

In addition, since it is cured within 1 ~ 2 hours after construction, it is possible to shorten the construction period by quick waterproofing work.

In addition, the present invention ensures low temperature curing that can be performed at a temperature of -5 ° C or lower.

Further, the present invention is excellent in water resistance and weather resistance, and does not show hardening shrinkage, and is 100% waterproof.

Test Methods unit Reference value Test result Test Methods Amount of water g 20 or less 0.3 Polymer cement
Mortar quality standard
(KSF4042)
Water absorption coefficient Kg (m < 2 > h 0.5) 0.5 or less 0.01 Moisture permeation resistance (Sd) m 2 or less 1.8

Further, the present invention can prevent damage due to weight and heat by integrally attaching the mother body and the waterproof layer.

Test Items unit Reference value Test result Test Methods Bond strength (standard conditions) MPa 1.0 or higher 1.4 KSF 4042
Bond strength (after warm-cold repeat) MPa 1.0 or higher 1.1

Further, the present invention does not cause cracks and breakage due to external impact or the like due to the durability and strength enhancement effect of the concrete matrix.

Test Items unit Reference value Test result Test Methods Flexural strength MPa 6 or more 21.2 KSF 4042
Length change rate % Within ± 0.15 -0.06

Further, the present invention is excellent in strong acid and strong alkali resistance, has no reaction with water and calcium chloride, and has excellent durability against deterioration of mother body and salt corrosion.

Further, the present invention is a non-toxic eco-friendly product free of heavy metal components such as cadmium (Cd) and lead (Pb).

Test Items unit Reference value Test result Test Methods Compressive strength after alkali resistance test g 20 or more 46.2 KSF 4042

Neutralization resistance Mm 2 or less 0.1 Chloride ion penetration resistance Coulombs 1,000 or less 434

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: Waterproofing method of concrete structure using resin mortar

Claims (13)

Treating the surface of the concrete structure with a pneumatic hammer to break the concrete, grinding the surface of the grinder with chipping and mixing, and cleaning;
And 80% by weight of resin mortar and 20% by weight of latex powder on the surface of the pretreated concrete structure, wherein the resin mortar comprises (a) urethane acrylate resin as the first binder resin and polymethylmethacrylate as the second binder resin (B) a curing agent, (c) sand, and (d) a filler, wherein the mixing ratio of the urethane acrylate resin and the polymethyl methacrylate resin is 10 to 60:90 to 40 Wherein the curing agent is composed of benzoyl peroxide 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 is added, and the sand is composed of a mixture of two or more types of sand having different particle diameters, A sand having a particle diameter in the range of 0.4 to 0.8 mm, a sand having a particle diameter in the range of 0.4 to 0.8 mm, or a mixture thereof, wherein the sand contains saline, And 20 to 20 parts by weight of a resin mortar, wherein gravel is added to the resin mortar, the gravel has a particle diameter ranging from 2 mm to 15 mm, the calcium carbonate has a particle diameter ranging from 10 to 80 μm, Applying a primer coating composition in the range of 50 mu m to 200 mu m;
Installing glass fibers on the primer coating;
A mortar resin composed of 30 to 80 wt% of a primer coating agent, 0.5 to 2 wt% of a dispersant, 0.5 to 2 wt% of an admixture, 0.1 to 2 wt% of a defoamer, 18.9 to 64 wt% of a latex powder, 10 to 25% by weight of calcium sulfoaluminate, 10 to 25% by weight of Portland cement (OPC), 0.15 to 5% by weight of a fluidizing agent, 0.05 to 5% by weight of a hardening retarder, 0.5 to 5% To 10% by weight of an elastic resin and 2 to 10% by weight of an elastic resin in a ratio of 1: 1;
Applying a primer coating agent to the surface to which the mortar resin and the cross-sectional restorative agent are applied;
0.57 mol / l TiO2 sol prepared from Ti [OCH (Cl3) 2] 4 and (CH3) 2 CHOH on the surface of the primer coating agent, SiO2 sol 0.44 made 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 (sol) A photocatalyst having a composite treatment of 40% of sol and 9% of ZnO sol and 1% or more of at least one metal ion selected from Ag, Zn and Cu is applied to a certain thickness of the concrete structure using resin mortar Waterproofing method.
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KR101773082B1 (en) 2016-09-26 2017-09-01 주식회사 한샘테크닉스 The resin composition and concrete waterproofing method using the same
KR101773799B1 (en) * 2016-09-05 2017-09-04 김명래 Concrete waterproofing method using the same and waterproof coating
KR102073932B1 (en) * 2019-02-21 2020-03-12 주식회사 씨앤에스테크 Durability improvement method of steel structure or concrete structure
CN112705185A (en) * 2020-12-29 2021-04-27 四川建筑职业技术学院 Preparation method of quartz sand/titanium dioxide composite catalyst
KR102252501B1 (en) 2020-08-28 2021-05-17 주식회사 브리텍 Heat-shielding waterproofing composition
KR102256128B1 (en) 2020-08-28 2021-05-25 (주)미래이앤씨 heat-shielding concrete structure waterproofing method
KR102257306B1 (en) 2020-08-28 2021-05-27 (주)부성이엔씨 Heat-shielding and antifouling waterproofing composition and concrete structure waterproofing paving method

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KR100869080B1 (en) * 2008-03-20 2008-11-21 (주) 테크원 Resin mortar composition and paved structure by using the composition
KR101027595B1 (en) 2010-04-15 2011-04-06 김의연 Exposure water-proofing composites of concrete constructions and complex exposure water-proofing construction method using thereof
KR101428995B1 (en) * 2014-03-06 2014-08-12 나공열 Surface Protector with Network Structure and Repairing Polymer Mortar Composite with Light Weight Aggregate for Concrete Structure Repairing System

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KR100405022B1 (en) * 2003-01-10 2003-11-07 Conclinic Co Ltd Mortar composition for repairing concrete
KR100869080B1 (en) * 2008-03-20 2008-11-21 (주) 테크원 Resin mortar composition and paved structure by using the composition
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KR101428995B1 (en) * 2014-03-06 2014-08-12 나공열 Surface Protector with Network Structure and Repairing Polymer Mortar Composite with Light Weight Aggregate for Concrete Structure Repairing System

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KR101773799B1 (en) * 2016-09-05 2017-09-04 김명래 Concrete waterproofing method using the same and waterproof coating
KR101773082B1 (en) 2016-09-26 2017-09-01 주식회사 한샘테크닉스 The resin composition and concrete waterproofing method using the same
KR102073932B1 (en) * 2019-02-21 2020-03-12 주식회사 씨앤에스테크 Durability improvement method of steel structure or concrete structure
KR102252501B1 (en) 2020-08-28 2021-05-17 주식회사 브리텍 Heat-shielding waterproofing composition
KR102256128B1 (en) 2020-08-28 2021-05-25 (주)미래이앤씨 heat-shielding concrete structure waterproofing method
KR102257306B1 (en) 2020-08-28 2021-05-27 (주)부성이엔씨 Heat-shielding and antifouling waterproofing composition and concrete structure waterproofing paving method
CN112705185A (en) * 2020-12-29 2021-04-27 四川建筑职业技术学院 Preparation method of quartz sand/titanium dioxide composite catalyst

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