KR102434601B1 - Composition of high elastic putty with enhanced crack resistance and antibacterial, and CRS-D construction method using the same - Google Patents

Abstract

The present invention relates to an eco-friendly high-elasticity putty composition with enhanced crack resistance and antibacterial properties, and a CRS-D crack repair method using the same. According to the present invention, with respect to 100 to 150 parts by weight of an acrylic binder for crack resistance, adhesiveness, and waterproofness, the eco-friendly high-elasticity putty composition comprises: 10 to 50 parts by weight of a first filler made of precipitated calcium carbonate having an average particle diameter of 1 to 10 μm, a BET specific surface area of 8 to 20 m^2/g, and a pore volume of 15 to 35 cm^3/g; 20 to 80 parts by weight of a second filler made of a composite containing zeolite or diatomite supported with at least one metal hydroxide selected from a group consisting of calcium hydroxide (Ca(OH)_2), magnesium hydroxide (Mg(OH)_2), and barium hydroxide (Ba(OH)_2); 30 to 100 parts by weight of a third filler made of an unsaturated polyester resin or a polyurethane composite for high elasticity; and 10 to 100 parts by weight of an antibacterial material for antibacterial properties. The acrylic binder is composed of an acrylic emulsion : silicate = 1 to 1.5 : 0.3 to 0.8 in a weight ratio. According to the present invention, the eco-friendly high-elasticity putty composition provides enhanced crack resistance and antibacterial properties.

Description

Eco-friendly high elastic putty composition having improved crack resistance and antibacterial properties and CRS-D crack repair method using the same

The present invention relates to an eco-friendly high elasticity putty composition and a crack repair method using the same, and more particularly, to an eco-friendly high elasticity putty composition having improved crack resistance and antibacterial properties, and a CRS-D crack repair method using the same.

Concrete is a discontinuous, anisotropic and inhomogeneous hardening body made by mixing cement, aggregate, water and other admixture materials, and its physical and chemical properties are very diverse and complex.

Such concrete has many voids and microcracks from the manufacturing stage due to hydration reaction, bleeding, heat of hydration, plastic shrinkage, and different characteristics of materials. The microcracks generated during the manufacturing stage grow into cracks.

As such, cracks in concrete structures are caused by various factors and factors, and the effects on concrete structures are also varied.

In addition, cracks can be classified into cracks due to material factors constituting concrete, cracks due to design errors, cracks due to poor construction, and cracks due to load action. It affects the lowering of load carrying capacity due to corrosion of reinforcing bars, lowering of watertightness and airtightness, and aesthetics.

Cracks occurring in a concrete structure significantly degrade the performance of concrete when severe, and further lose its role as a structure, shortening its lifespan. In addition, it is the main cause of deterioration of all functions such as the strength and durability of the structure, causing serious problems in the safety and usability of the structure, and various studies are being conducted in the industry to prevent this.

Republic of Korea Patent Publication No. 10-1744500 Republic of Korea Patent Publication No. 10-2283133

An object of the present invention is to provide an eco-friendly, high-elasticity putty composition having improved crack resistance and antibacterial properties, and a CRS-D crack repair method using the same, as devised in consideration of and solving the conventional problems described above.

The present invention provides an eco-friendly, high-elasticity putty composition and CRS-D crack repair using the same, which makes it strong against vibration as well as contraction and expansion of a concrete structure by high elastic elongation, and has excellent elongation and adhesion strength to improve crack resistance. The purpose is to provide a technique.

The present invention maximizes the antibacterial effect and deodorization effect through the grafting of an eco-friendly antibacterial material and adjuvant, thereby preventing mold and bacteria from occurring in the concrete structure, and through this, it is possible to prevent cracks even after long-term use. An object of the present invention is to provide an eco-friendly high-elasticity putty composition and a CRS-D crack repair method using the same.

An eco-friendly high-elasticity putty composition having improved crack resistance and antibacterial properties according to the present invention for achieving the above object is based on 100 to 150 parts by weight of an acrylic binder for crack resistance, adhesion and waterproofness; 10 to 50 parts by weight of a first filler made of light calcium carbonate having an average particle size of 1 to 10 μm, a BET specific surface area of 8 to 20 m 2 /g, and a pore volume of 15 to 35 cm 3 /g; Calcium hydroxide [Ca(OH) ₂ ], magnesium hydroxide [Mg(OH) ₂ ] and barium hydroxide [Ba(OH) ₂ ] In a composite containing at least one metal hydroxide supported zeolite or diatomaceous earth 20 to 80 parts by weight of the second filler; 30-100 parts by weight of a third filler made of an unsaturated polyester resin or polyurethane composite for high elasticity; 10 to 100 parts by weight of an antimicrobial material for antibacterial properties; and the acrylic binder is characterized in that it consists of a weight ratio of acrylic emulsion: silicate = 1-1.5: 0.3-0.8.

Here, the acrylic emulsion may be a liquid nano acrylic emulsion having a specific gravity of 1.02 and a solid content of 40 to 60%, and the silicate may be a liquid nano silicate having a specific gravity of 1.01 and a solid content of 2 to 3%.

Here, the acrylic emulsion has a composition in which silane is mixed in order to have crack resistance, increased adhesion, and high permeability, and the acrylic emulsion: silane = 1-1.2: It may be mixed in a weight ratio of 0.2-0.3. .

Here, the antimicrobial material may include at least one antimicrobial powder selected from volcanic stone powder, oyster shell powder, and loess powder; one type of sawdust selected from cypress, cypress, and cedar; essential oils; Doedoe consisting of a mixture containing, the antibacterial powder: sawdust: essential oil = 1-1.5: 0.2-0.5: mixed in a weight ratio of 0.1-0.5, the essential oil is eucalyptus, German chamomile, cedarwood, cinnamon, bergamot, It may be at least one selected from lemon, cypress, rose geranium, lemongrass, juniper berry, tea tree, peppermint, rosemary, sandalwood, ginger, lavender, thyme, neroli, palmanosa, citronella, and clove.

Here, each of the volcanic stone powder, oyster shell powder, and loess powder for use as the antibacterial powder is pulverized to a particle size of 0.5 to 1 mm, washed with water or distilled water, and at a temperature of 90 to 110 ° C. for 12 to 24 hours. It is a configuration processed by evaporating to dryness and performing heat treatment by calcination at a temperature of 900 to 1200° C. for 2 to 3 hours; The antibacterial powder is a mixture of volcanic stone powder, oyster shell powder, and loess powder, which has been calcined, in a weight ratio of volcanic stone powder or oyster shell powder: loess powder = 6-9: 1-4, and the mixture is stirred and stirred. The mixture composition may be heat-treated at a temperature of 110 to 150° C. for 2 to 3 hours, and pulverized to a particle size of 0.05 to 0.3 mm.

Here, the polyurethane composite is an amino group (-NH ₂ ) in a composite obtained by reacting a polyol mixed with a bio-polyester polyol and a petroleum polyol in a weight ratio of 4-5: 5-6 with phenyl isocyanate. It is a composition in which the introduced cellulose crystals are added and mixed; The bio-polyester polyol, azelaic acid (azelaic acid), adipic acid (adipic acid), sebacic acid (sebasic acid), at least one or more of the acid system of isophthalic acid (isophthalic acid), and isosorbide (isosorbide) , 1,3-propanediol (1,3-propanediol) is a composition prepared by synthesizing at least one type of alcohol, and the petroleum polyol may be polytetramethylene ether glycol. .

In addition, the CRS-D crack repair method using the eco-friendly high-elasticity putty composition having improved crack resistance and antibacterial properties according to the present invention for achieving the above object is a crack repair method for cracks in the structure, Cleaning the construction part having the cracked part cleanly; Applying mortar to the construction part to work on the ground; Filling or applying a high-elasticity putty agent to the construction part on which the ground work is completed with a mortar; includes, wherein the high-elasticity putty is an eco-friendly high-elasticity putty composition having improved crack resistance and antibacterial properties having the configuration described above characterized in that

Here, the mortar is SBR (Styrene Butadiene Ruber) or a synthetic polymer of silicone or a super fast polymer of polyurea epoxy composite resin, or a polymer that can use both the synthetic polymer and super fast polymer; polyvinyl alcohol (PVA) fibers; Including; and may be composed of 20 to 80 parts by weight of polyvinyl alcohol fiber and 5 to 30 parts by weight of natural cellulose based on 100 to 120 parts by weight of the polymer.

Here, the mortar is, cement per second or Portland cement 10 to 30 parts by weight; 0.1-5 parts by weight of polycarboxylic acid-based powder as a high-performance water reducing agent; further comprising, wherein the super-fast cement is CaO 51.4%, SiO ₂ 11.9%, Al ₂ O ₃ 12.9%, SO ₃ 13.5%, Fe ₂ O ₃ 2.4 %, MgO 1.7%, TiO ₂ 0.6%, K ₂ O is a component containing 0.5%, and the density is 2.90 to 2.95 g / ㎤, the high-performance water reducing agent has a density of 0.5 to 1.06 g / ㎤, pH 5.5 to 7.5. have.

Here, the synthetic polymer, in the case of SBR (Styrene Butadiene Ruber), consists of 60 to 70% by weight of styrene and 30 to 40% by weight of butadiene, and has a density of 1.00 to 1.12 g/cm 3 , pH 8 to 8.2, and a viscosity of 20 to 30 cps. (at 25°C), the surface tension is 30-40 dynes/cm at 25°C; The super-fast polymer has a viscosity of 14 to 15 cps (at 25° C.), and may be a two-component type that is mixed with a curing agent in a weight ratio of 1:1.

According to the present invention, it is possible to provide an eco-friendly, high-elasticity putty composition having improved crack resistance and antibacterial properties, and a CRS-D crack repair method for repairing cracks in a structure using the same.

According to the present invention, it is possible to secure high elastic elongation through a suitable design of the components and formulations of the raw materials used, and through this, it is possible to exhibit excellent properties in the contraction and expansion of the concrete structure as well as vibration, and to have excellent elongation and adhesion strength. By doing so, the usefulness of improving crack resistance can be achieved.

According to the present invention, it is possible to maximize the antibacterial effect and deodorization effect through grafting of an eco-friendly antibacterial material and an auxiliary agent, so that mold and bacteria can be prevented from occurring in the concrete structure, and through this, it can be used for a long time in the crack repair site. It is also possible to achieve the usefulness of preventing the occurrence of cracks.

1 is a flowchart showing a CRS-D crack repair method using an eco-friendly high-elasticity putty composition having improved crack resistance and antibacterial properties according to an embodiment of the present invention.

Preferred embodiments of the present invention will be described with reference to the accompanying drawings, and the purpose and configuration of the present invention and its features will be better understood through such detailed description.

The eco-friendly high elasticity putty composition having improved crack resistance and antibacterial properties according to an embodiment of the present invention is based on 100 to 150 parts by weight of the acrylic binder, 10 to 50 parts by weight of the first filler, 20 to 80 parts by weight of the second filler, and the third 30-100 parts by weight of a filler and 10-100 parts by weight of an antibacterial material.

The acrylic binder is intended to implement crack resistance, adhesiveness, waterproofness, etc., and a composition in which silicate is mixed with an acrylic emulsion is preferable.

For example, the acrylic binder may be formulated in a weight ratio of acrylic emulsion: silicate = 1-1.5: 0.3-0.8.

At this time, the acrylic emulsion preferably uses a liquid nano acrylic emulsion having a specific gravity of 1.02 and a solid content of 40 to 60%, and the silicate preferably uses a liquid nano silicate having a specific gravity of 1.01 and a solid content of 2 to 3%, Through this, physical properties such as crack resistance, adhesion, and waterproofness can be further improved.

When the acrylic binder is used as a high-elastic putty agent, it has crack resistance and serves to induce initial adhesion and curing acceleration. In the acrylic emulsion, a composition including a hydroxyl group is more preferable to enhance crack resistance.

For example, the acrylic emulsion may be hydroxyethyl acrylate, hydroxyethyl methacrylate, or the like.

As an example, the nano silicate is prepared by immersing layered aluminum silicate in an ethylene oxide polymer resin solution so that the solvent penetrates the interlayer of the silicate to disperse the silicate layer, and the silicate is dispersed in the polymer resin solution during the drying process. and may be in the form of particles having a diameter of 1 to 2 microns.

In this case, it may be prepared in a form having a certain directionality through a process of imparting electrical polarity to the nano-silicate particles using a surfactant.

In addition, the acrylic emulsion can have a composition in which silane is added and mixed in order to have crack resistance, increased adhesion, and high permeability. have.

The first filler uses light calcium carbonate to secure better crack resistance, and to form a coating film and a stable putty layer.

The first filler has an average particle diameter of 1 to 10 μm with respect to light calcium carbonate, a BET specific surface area of 8 to 20 m 2 /g, and a pore volume of 15 to 35 cm 3 /g. It is possible to maintain mechanical strength, including tensile strength, while increasing the mixability.

The second filler is calcium hydroxide [Ca(OH) ₂ ], magnesium hydroxide [Mg(OH) ₂ ] and barium hydroxide [Ba(OH) ₂ ] zeolite or diatomaceous earth supported by at least one metal hydroxide selected from the group consisting of It can be composed of a composite comprising a, and can have excellent plastic deformation resistance while improving adhesion.

The second filler chemically reacts with the cement component of the existing concrete surface to have a strong adhesive strength with the base surface, thereby improving adhesion.

In the second filler, zeolite or diatomaceous earth may exert an antibacterial effect such as preventing mold or bacteria, and may increase crack resistance.

The third filler is intended to have high elasticity, and any one of an unsaturated polyester resin or a polyurethane composite may be selected.

The third filler can provide strong characteristics against vibration as well as contraction and expansion of the concrete structure by supporting to secure elongation due to high elasticity.

The unsaturated polyester resin may be prepared by condensation reaction of maleic anhydride, phthalic anhydride, and propylene glycol to secure elongation due to high elasticity.

The polyurethane composite is a polyol obtained by mixing biopolyester polyol and petroleum polyol in a weight ratio of 4 to 5: 5 to 6 in order to secure elongation due to high elasticity and impart tensile strength to phenyl isocyanate. It may be a mixture prepared by adding cellulose crystals introduced with an amino group (-NH ₂ ) to the complex reacted with.

The bio-polyester polyol includes at least one of an acid system of azelaic acid, adipic acid, sebasic acid, and isophthalic acid, and isosorbide, At least one of alcohol-based 1,3-propanediol may be synthesized.

As the petroleum polyol, polytetramethylene ether glycol may be used.

Here, the cellulose crystal into which the amino group (-NH ₂ ) is introduced is surface-modified by introducing an amino group (-NH ₂ ) into the cellulose crystal using 3-triethoxysilylpropylamine (3-aminopropyltriethoxysilane) as a coupling agent. it could be

Here, the amino group (-NH ₂ ) introduced into the cellulose crystal serves to form a strong urea bond at the interface with the isocyanate group (-NCO) of phenyl isocyanate, and through this, high elasticity for the polyurethane composite In addition, it is possible to provide the advantage of increasing the tensile strength.

The antimicrobial material is intended to exhibit antibacterial properties, and may be configured to include antibacterial powder, sawdust and essential oil.

The antibacterial material may be a mixture of antibacterial powder: sawdust: essential oil = 1-1.5: 0.2-0.5: 0.1-0.5 by weight ratio of mixing.

The antimicrobial powder may be at least one selected from volcanic stone powder, oyster shell powder, and loess powder.

At this time, the antibacterial powder includes volcanic stone powder, oyster shell powder, and loess powder, respectively, ground to a particle diameter of 0.5 to 1 mm, washed with water or distilled water, and evaporated for 12 to 24 hours at a temperature of 90 to 110 ° C. It may be processed by drying and heat treatment by calcination at a temperature of 900 to 1200° C. for 2 to 3 hours.

In addition, the antibacterial powder may be a mixture of two or more types of volcanic stone powder, oyster shell powder, and loess powder that have been calcined in the form as described above.

For example, volcanic stone powder or oyster shell powder: loess powder = 6~9: It may be a composition mixed with a weight ratio of 1~4. After heat treatment for 2 to 3 hours under temperature conditions, it may be pulverized to a particle size of 0.05 to 0.3 mm.

Here, the mixture composition may be heated and stirred when stirring.

The sawdust may be made of one selected from cypress, arborvitae, and cedar.

The essential oils are eucalyptus, german chamomile, cedarwood, cinnamon, bergamot, lemon, cypress, rose geranium, lemongrass, juniper berry, tea tree, peppermint, rosemary, sandalwood, ginger, lavender, thyme, neroli, palmanosa, It may be at least one selected from citronella and cloves.

As described above, the antibacterial material having a composition containing antibacterial powder, sawdust and essential oil maximizes the antibacterial and deodorizing effect during construction to prevent mold and bacteria from occurring in the concrete structure. It can also prevent cracks from occurring.

In addition, in the present invention, it is possible to have a configuration in which one or more selected from the group consisting of a thickener, a thickening stabilizer, a pH adjuster, a plasticizer, an antifoaming agent, and an antiseptic agent is further added.

As described above, 50 to 100 parts by weight of the first filler, 20 to 60 parts by weight of the second filler, 10 to 30 parts by weight of the third filler, 10 to 100 parts by weight of the antibacterial material with respect to 100 to 150 parts by weight of the acrylic binder. The eco-friendly high-elasticity putty composition having improved crack resistance and antibacterial properties according to the present invention can be prepared with an eco-friendly high-elasticity putty agent that satisfies a specific gravity of 1.45±0.05 and a viscosity of 140000±10000.

In addition, it can be used to repair cracks in concrete structures by manufacturing an eco-friendly high-elasticity putty that satisfies 650% elongation and tensile strength of 1.1Mpa or more. can do.

Hereinafter, the effects of the configuration of the present invention will be described in more detail through Examples and Comparative Examples. The present embodiment is merely an embodiment for describing the present invention in more detail, and the scope of the present invention is not limited by these embodiments.

In Examples, high elasticity putty agents were prepared by blending and mixing the ingredients in Table 1 below, and Comparative Examples were prepared in a form that did not include a third filler or an antibacterial material, and only an acrylic emulsion was used as an acrylic binder.

ingredient Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Acrylic binder (parts by weight) 100 100 100 100 100 First filler (parts by weight) 10 10 10 10 10 Second filler (parts by weight) 50 50 50 50 50 Third filler (parts by weight) 50 70 100 20 Antibacterial material (parts by weight) 30 30 30 30

Here, in Examples 1 to 3 and Comparative Example 1, acrylic emulsion: silicate = 1 to 0.5 in the weight ratio of acrylic binder in the acrylic binder, and silane was added to the acrylic emulsion only in Example 3, but in a ratio of 1: 0.3 They were mixed in a weight ratio, and in Comparative Example 2, only an acrylic emulsion was used without using silicate in the acrylic binder.

Here, with respect to the antimicrobial material in Examples and Comparative Examples, the antibacterial powder: sawdust: essential oil = 1: 0.3: 0.2 weight ratio was equally mixed, and oyster shell powder was used as the antibacterial powder, and only in Example 2, the antibacterial powder was used. Oyster shell powder: loess powder = 6 : 1 by weight was mixed and used.

(Test example: measurement of mechanical properties)

The mechanical properties of elongation, tensile strength, and adhesion strength were measured for the high elasticity putty prepared with the composition as in Examples 1 to 3 and Comparative Examples 1 to 2, and the results are shown in Table 2 below.

Elongation was measured at 7 days of age according to Korean Industrial Standard KS F 3211, and tensile strength and adhesion strength were measured according to Korean Industrial Standard KS F 4042-02 after 28 days of repair work.

division Elongation (%) Tensile strength (Mpa) Adhesive strength (Mpa) Example 1 652 2.1 2.6 Example 2 681 1.8 2.6 Example 3 697 1.3 2.9 Comparative Example 1 439 1.9 2.1 Comparative Example 2 358 2.2 1.9

As shown in Table 2, it can be seen that the composition having the high elasticity putty composition according to the present invention exhibits superior mechanical properties in terms of elongation and adhesion strength compared to the comparative example.

In the present invention, it has the purpose of making the concrete structure resistant to contraction and expansion as well as vibration during crack repair by securing high elastic elongation, which shows that this can be sufficiently achieved.

In addition, antimicrobial evaluation was performed on the above-described Examples and Comparative Examples, and the results are shown in Table 3.

To verify the antibacterial performance, a minimum growth inhibitory concentration (MIC) test was conducted, and the minimum growth inhibitory concentration (MIC) was measured in KS 4403 Annex 2 「Minimum growth inhibitory concentration (MIC) of inorganic fungicides against sulfur oxidizing bacteria). It carried out according to the measurement method. First, a test cell solution was prepared according to the characteristics of the sulfur-oxidizing bacteria, and each test well added by concentration was prepared and sealed, followed by high-pressure steam sterilization. Samples according to Examples and Comparative Examples were prepared, and 1 mL of a culture dilution was inoculated to adjust the total amount to 100 mL. The inoculated sample was placed in a rotary incubator controlled at a temperature of 30° C. and 150 rpm and cultured for 4 weeks. In Table 3 below, blue means that the test bacteria do not proliferate, and yellow means that the test bacteria proliferate.

division Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 0 days blue blue blue blue blue 2 days blue blue blue blue blue 1 week blue blue blue yellow blue 4 weeks blue blue blue yellow blue

As shown in Table 3, in Comparative Example 1, which did not use the antibacterial material, it showed that the test bacteria were proliferated after 1 week, and in Examples 1 to 3 and Comparative Example 2 using the antibacterial material, blue was applied for 4 weeks. This shows that the test bacteria do not proliferate.

Meanwhile, FIG. 1 is a flowchart illustrating a CRS-D crack repair method using an eco-friendly, high-elasticity putty composition having improved crack resistance and antibacterial properties according to an embodiment of the present invention.

Referring to FIG. 1, in the CRS-D crack repair method for a cracked part of a structure, using the eco-friendly high-elasticity putty composition having the improved crack resistance and antibacterial properties described above, a high-elasticity putty for manufacturing an eco-friendly high-elasticity putty A first manufacturing step (S10), a cleaning step (S20) of cleaning the construction part having a cracked part of the structure, a mortar-king operation step (S30) of applying mortar to the construction part and performing a ground work (S30), and a ground work with mortar It includes a crack stop operation step (S40) of filling or applying a high-elasticity putty agent to the completed construction part.

At this time, in the present invention, crack resistance can be further strengthened by working in advance of the mortalizing operation step (S30) prior to the crack stop operation step (S40).

The mortar used in the mortar-king operation step (S30) has high strength, high-performance expansion, non-shrinkage, antibacterial, and anti-rust functions, and can provide a synergistic effect on crack resistance.

In the high-elasticity putty preparation step (S10), an eco-friendly high-elasticity putty agent is prepared by using an eco-friendly high-elasticity putty composition having improved crack resistance and antibacterial properties, which has already been described in detail above.

The mortar used in the mortar-king operation step (S30) may be composed of 20 to 80 parts by weight of polyvinyl alcohol fiber and 5 to 30 parts by weight of natural cellulose based on 100 to 120 parts by weight of the polymer.

As the polymer, SBR (Styrene Butadiene Ruber) or a synthetic polymer of silicone or a super fast polymer of polyurea epoxy composite resin, or both the synthetic polymer and super fast polymer may be used.

At this time, in the case of SBR (Styrene Butadiene Ruber), the synthetic polymer consists of 60 to 70% by weight of styrene and 30 to 40% by weight of butadiene, and has a density of 1.00 to 1.12 g/cm 3 , pH 8 to 8.2, and a viscosity of 20 to 30 cps (25 ℃), it is preferable to use a surface tension of 30 to 40 dynes/cm at 25°C.

It is preferable to use a two-component type polymer that has a viscosity of 14 to 15 cps (at 25° C.) and is blended with a curing agent in a weight ratio of 1:1.

In the case of using both the synthetic polymer and the super fast polymer, it can be blended in a weight ratio of synthetic polymer: super fast polymer = 1 to 2: 0.5 to 1.5.

The polyvinyl alcohol (PolyVinyl Acohol; PVA) fiber exhibits excellent alkali resistance and can exhibit an anchor effect such as providing a physical bonding force through the uneven surface of the fiber surface.

The natural cellulose is a water-insoluble material, and provides a function of preventing mortar cracking and reducing shrinkage, preventing mortar sagging and improving rheology, and can provide an effect of shortening working time.

In addition, the mortar may have a configuration further comprising 10 to 30 parts by weight of cement per second or Portland cement, and 0.1 to 5 parts by weight of a polycarboxylic acid-based powder as a high-performance water reducing agent.

The super-velocity cement is CaO 51.4%, SiO ₂ 11.9%, Al ₂ O ₃ 12.9%, SO ₃ 13.5%, Fe ₂ O ₃ 2.4%, MgO 1.7%, TiO ₂ 0.6%, K ₂ O containing 0.5% It is a component, and it is preferable to use a material having a density of 2.90 to 2.95 g/cm 3 .

It is preferable to use the high-performance water reducing agent having a density of 0.5 to 1.06 g/cm 3 and a pH of 5.5 to 7.5.

The mortar having such a composition is a polymer mortar, and by using an eco-friendly solvent, there are no harmful substances such as formaldehyde and VOC, and a primer is unnecessary, so the working time can be shortened.

The crack stop operation step (S40) is a construction part where the environment-friendly high-elasticity putty prepared using the eco-friendly high-elasticity putty composition having improved crack resistance and antibacterial properties of the present invention is used as a mortar, and the high-elasticity putty is filled or This is the dispensing step.

The crack stop operation step (S40) may be directly processed on the construction part having cracks without performing the mortalizing operation step (S30), if necessary.

As described above, the CRS-D crack repair method using the eco-friendly high-elasticity putty composition having improved crack resistance and antibacterial properties carried out in detail in the present invention may be called 'CRS-D method'.

Accordingly, through the present invention having the above-described configuration, it is possible to provide an eco-friendly, high-elasticity putty composition having improved crack resistance and antibacterial properties and a CRS-D crack repair method using the same, and in particular, the mortar work and When crack-stop work is performed together, it can provide the advantage of further strengthening crack resistance.

The embodiments described above are only to describe preferred embodiments of the present invention and are not limited to these embodiments, and various modifications and variations by those skilled in the art within the spirit and claims of the present invention Or it will be said that the substitution of steps may be made, and this will be said to be within the scope of the technical rights of the present invention.

Claims (10)

Based on 100 to 150 parts by weight of an acrylic binder for crack resistance, adhesion and waterproofness;
10 to 50 parts by weight of a first filler made of light calcium carbonate having an average particle size of 1 to 10 μm, a BET specific surface area of 8 to 20 m 2 /g, and a pore volume of 15 to 35 cm 3 /g;
Calcium hydroxide [Ca(OH) ₂ ], magnesium hydroxide [Mg(OH) ₂ ] and barium hydroxide [Ba(OH) ₂ ] In a composite containing at least one metal hydroxide supported zeolite or diatomaceous earth 20 to 80 parts by weight of the second filler;
30-100 parts by weight of a third filler made of an unsaturated polyester resin or polyurethane composite for high elasticity;
10 to 100 parts by weight of an antibacterial material for antibacterial properties; includes,
The acrylic binder is an acrylic emulsion: silicate = 1 to 1.5: eco-friendly high elasticity putty composition having improved crack resistance and antibacterial properties, characterized in that consisting of a weight ratio of 0.3 to 0.8. The method of claim 1,
The acrylic emulsion is a liquid nano acrylic emulsion having a specific gravity of 1.02 and a solid content of 40 to 60%,
The silicate is an eco-friendly high elasticity putty composition having improved crack resistance and antibacterial properties, characterized in that it is a liquid nano silicate having a specific gravity of 1.01 and a solid content of 2 to 3%. The method of claim 1,
The acrylic emulsion has a composition in which silane is mixed in order to have crack resistance, increased adhesion and high permeability,
The acrylic emulsion: silane = 1 to 1.2: Eco-friendly high elasticity putty composition having improved crack resistance and antibacterial properties, characterized in that it is mixed in a weight ratio of 0.2 to 0.3. The method of claim 1,
The antibacterial material is
at least one antibacterial powder selected from volcanic stone powder, oyster shell powder, and loess powder;
one type of sawdust selected from cypress, cypress, and cedar;
essential oils; Do not consist of a mixture comprising
The antibacterial powder: sawdust: essential oil = 1-1.5: 0.2-0.5: mixed in a weight ratio of 0.1-0.5,
The essential oils are eucalyptus, german chamomile, cedarwood, cinnamon, bergamot, lemon, cypress, rose geranium, lemongrass, juniper berry, tea tree, peppermint, rosemary, sandalwood, ginger, lavender, thyme, neroli, palmanosa, An eco-friendly, high-elasticity putty composition having improved crack resistance and antibacterial properties, characterized in that at least one selected from citronella and cloves. 5. The method of claim 4,
Each of volcanic stone powder, oyster shell powder, and loess powder for use as the antibacterial powder,
pulverized to a particle size of 0.5 to 1 mm,
Wash with water or distilled water,
Evaporated to dryness for 12 to 24 hours at a temperature of 90 to 110 ° C,
processing by performing heat treatment by calcination at a temperature of 900 to 1200° C. for 2 to 3 hours;
The antibacterial powder,
For the volcanic stone powder, oyster shell powder, and loess powder that have been calcined, volcanic stone powder or oyster shell powder: loess powder = 6~9: 1~4 by weight,
Agitating the mixture,
Heat treatment of the stirred mixture composition at a temperature of 110 ~ 150 ℃ for 2-3 hours,
An eco-friendly, high-elasticity putty composition having improved crack resistance and antibacterial properties, characterized in that it is pulverized to a particle diameter of 0.05 to 0.3 mm. The method of claim 1,
The polyurethane composite,
Biopolyester polyol and petroleum polyol were mixed with phenyl isocyanate in a weight ratio of 4-5: 5-6 by adding and mixing cellulose crystals introduced with an amino group (-NH ₂ ) to the complex. composition;
The bio-polyester polyol,
At least one of an acid system of azelaic acid, adipic acid, sebasic acid, and isophthalic acid, and isosorbide, 1,3-propanediol (1,3-propanediol) is a composition prepared by synthesizing at least one type of alcohol,
The petroleum polyol is
An eco-friendly, high-elasticity putty composition having improved crack resistance and antibacterial properties, characterized in that it is polytetramethylene ether glycol. In the crack repair method for cracks in the structure,
cleaning the construction part having the cracked part of the structure;
Applying mortar to the construction part to work on the ground;
Filling or applying a high-elasticity putty agent to the construction part where the ground work is completed with mortar; including,
The high elasticity putty agent CRS-D crack repair method, characterized in that it consists of an eco-friendly high elasticity putty composition having improved crack resistance and antibacterial properties according to any one of claims 1 to 6. 8. The method of claim 7,
The mortar is
SBR (Styrene Butadiene Ruber) or a synthetic polymer of silicone or an ultra-fast polymer of polyurea-epoxy composite resin, or a polymer that can use both the synthetic polymer and the super-fast polymer;
polyvinyl alcohol (PVA) fibers;
natural cellulose; includes,
CRS-D crack repair method, characterized in that it consists of 20 to 80 parts by weight of polyvinyl alcohol fiber and 5 to 30 parts by weight of natural cellulose with respect to 100 to 120 parts by weight of the polymer. 9. The method of claim 8,
The mortar is
10 to 30 parts by weight of cement per second or Portland cement;
0.1-5 parts by weight of polycarboxylic acid-based powder as a high-performance water reducing agent; further comprising,
The super-velocity cement is CaO 51.4%, SiO ₂ 11.9%, Al ₂ O ₃ 12.9%, SO ₃ 13.5%, Fe ₂ O ₃ 2.4%, MgO 1.7%, TiO ₂ 0.6%, K ₂ O containing 0.5% It is a component, and has a density of 2.90-2.95 g/cm 3 ,
The high-performance water reducing agent CRS-D crack repair method, characterized in that the density of 0.5 ~ 1.06g / ㎤, pH 5.5 ~ 7.5. 9. The method of claim 8,
The synthetic polymer is
In the case of SBR (Styrene Butadiene Ruber), it consists of 60~70% by weight of styrene and 30~40% by weight of butadiene, but has a density of 1.00~1.12g/cm3, pH 8~8.2, viscosity 20~30cps (at 25℃), surface tension 30-40 dynes/cm at 25°C;
The superfast polymer is
CRS-D crack repair method, characterized in that it is a two-component type having a viscosity of 14 to 15 cps (at 25° C.) and blended with a curing agent in a weight ratio of 1:1.

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