KR101095381B1 - Cement mortar composite with excellent durability to acid and heat insulation, manufacturing method of finishing material for the floor, and manufacturing method of block - Google Patents

Abstract

PURPOSE: A cement mortar composition, and a method for manufacturing flooring materials and a method for manufacturing blocks using the same are provided to improve the intensity, the fluidity, the elasticity, the adhesive, and other characteristics of the composition by using an acid-resistance cement-based binder and polymer emulsion of high durability. CONSTITUTION: A cement mortar composition includes 25-60 weight% of a cement-based binder, 0.1-15 weight% of polymer emulsion, and 35-70 weight% of fine aggregate. The polymer emulsion includes 70-95 weight% of acryl emulsion, 1-10 weight% of polyvinyl acetate latex, 1-10 weight% of siloxane emulsion, and 0.1-10 weight% of aminoplast. The cement-based binder includes 10-50 weight% of ordinary cement, 5-30 weight% of alumina cement, 0.5-15 weight% of calcium sulfo-aluminate, 0.5-15 weight% of hollow silica powder, 0.1-15 weight% of blast furnace slag, 0.1-15 weight% of bottom ash, and 0.01-3 weight% of hollow nylon fiber. The fine aggregate includes 40-80 weight% of silica, 5-30 weight% of dolomite, 1-20 weight% of biotite, 1-20 weight% of sericite, and 1-20 weight% of lightweight aggregate.

Description

Cement mortar composite with excellent durability to acid and heat insulation, manufacturing method of finishing material for the floor, and manufacturing method of block}

The present invention relates to an environmentally friendly cement mortar composition having excellent acid resistance and excellent thermal insulation, a method of manufacturing a floor finishing material and a method of manufacturing a block using the same, and more particularly, by using an acid resistant cement-based binder, a polymer emulsion having excellent durability, and the like. The present invention relates to a cement mortar composition having excellent high fluidity, elasticity, adhesive strength and durability, particularly acid resistance and excellent heat retention, a method of manufacturing a floor finishing material using the same, and a method of manufacturing a block.

In general, cement-based finishing method refers to the floor finishing method using cement mortar. Cement mortar generally means a finishing material for concrete structures by mixing aggregates and cement in an arbitrary ratio at concrete construction sites, and mixing water to give a certain viscosity.

Aging of concrete structures means that concrete does not perform its original function and its properties deteriorate with time due to neutralization, salt damage, east sea, chemical erosion, alkali aggregate reaction, fatigue, weathering, and fire.

Chemical corrosion is a general term for the aging phenomenon in which concrete is subjected to chemical reactions from the outside, and the hydration products constituting the cement hardened body are deformed or decomposed and lose their binding ability.

In general environment, there is a small probability of chemical corrosion problem, and organic matter contained in domestic sewage, etc. reacts by bacteria to produce sulfate ions, which in turn erodes concrete, or is caused by acid substances such as hot spring zone or acid rain. In many cases, the concrete floor is eroded by acidic substances from livestock manure. Structures subject to chemical corrosion include chemical structures, food factories, related structures such as barn floors, soil contamination and underground structures in hot springs, sewage-related sewer pipes and covered structures.

Chemical corrosion is easy to be confused with the aging phenomenon caused by the neutralization, east sea, and salt sea.In addition, the structure is cast with the existing repair mortar instead of sulfuric acid-resistant repair mortar. Durability frequently decreases frequently.

Therefore, there is an urgent need to develop a composition used for repair work such as a barn floor, sewage conduit, and a covered structure that is highly likely to cause chemical corrosion separately from acid, neutralization, east sea, and salt sea, and a method of manufacturing a flooring material using the same.

On the other hand, livestock manure is made of very strong acid so that the concrete Erosion is frequently occurring, and farming difficulties are being raised such that livestock are buried in foot-and-mouth disease, dead or frozen due to disease. In order to solve this problem, it is necessary to maintain the warmth of the barn. It is necessary to suppress erosion.

The problem to be solved by the present invention is to use the acid-resistant cement-based binder and polymer emulsion having excellent durability, etc. It is excellent in strength and durability, especially acid resistance to prevent concrete corrosion due to chemical erosion such as barn floor, sewer pipe used to Significantly reduce maintenance costs, and use fine aggregates containing dolomite, biotite, biotite, silica siliceous sand, etc., which have excellent far-infrared effects. To provide a superior cement mortar composition, a method for producing a floor finishing material having excellent acid resistance and thermal insulation using the same and a method for producing a block.

The present invention comprises 25 to 60% by weight of cement-based binder, 0.1 to 15% by weight of polymer emulsion and 35 to 70% by weight of fine aggregate, wherein the polymer emulsion is 70 to 95% by weight of acrylic emulsion to improve the bonding strength and adhesion between inorganic materials. 1 to 10% by weight of polyvinylacetate latex for improving adhesion and heat resistance, 1 to 10% by weight of siloxane emulsion for improving acid and alkali resistance and 0.1 to 10% by weight of aminofrast emulsion for improving strength and durability It provides a cement mortar composition excellent in acid resistance and thermal insulation comprising a.

The cement binder is usually 10 to 50% by weight cement, 5 to 30% by weight alumina cement, 0.5 to 15% by weight calcium sulfoaluminate, 0.5 to 15% by weight hollow silica powder, 0.1 to 15% by weight blast furnace slag, bottom ash 0.1 to 15% by weight and 0.01 to 3% by weight hollow nylon fibers.

The fine aggregate may comprise 40 to 80% by weight of silica siliceous sand, 5 to 30% by weight, dolomite 1 to 20% by weight, biotite 1 to 20% by weight and light aggregate 1 to 20% by weight.

The polymer emulsion may further include a mixture of starch and methylcellulose in a weight ratio of 0.2 to 0.4: 0.6 to 0.8 in order to provide cohesive force and material separation resistance to form a stable concrete structure. And a mixture of methylcellulose is preferably contained in the polymer emulsion 0.1 to 5% by weight.

The polymer emulsion may further include an antifoaming agent for increasing the strength and durability by removing bubbles in the polymer emulsion, the antifoaming agent is preferably contained in the polymer emulsion 0.01 to 2% by weight.

The polymer emulsion may further include a reducing agent for reducing the water-cement ratio to improve strength and durability, and the reducing agent is preferably contained in the polymer emulsion in an amount of 0.01 to 2% by weight.

The cement-based binder may further include a retarder in order to secure workability for a predetermined time and to delay rapid curing, and the retardant is preferably contained in the cement-based binder 0.01 to 2% by weight.

The cement-based binder may further include a reducing agent for reducing the water-cement ratio to improve strength and durability, and the reducing agent is preferably contained in the cement-based binder in an amount of 0.01 to 2% by weight.

In addition, the present invention, the step of pouring the cement mortar composition to a mold formwork, 5-30% by weight of the cement-based binder, 1-30% by weight of the polymer emulsion, dolomite 1-25% on top of the cement mortar composition poured %, 1 to 25% by weight of biotite, 1 to 25% by weight of biotite, 0.1 to 15% by weight of titanium oxide (TiO ₂ ) and 0.1 to 10% by weight of carbon black is poured in a thickness of 0.5 to 3 cm And, vibrating and compressing the poured composition, and forming a floor finish by surface finishing and drying the molded result to form a floor finish having excellent acid resistance and thermal insulation.

In addition, the present invention includes the steps of pouring the cement mortar composition into a mold form, vibrating and compressing the molded cement mortar composition, and forming a block by surface finishing and drying the formed product Provided is a method for producing a block having excellent acid resistance and thermal insulation.

According to the cement mortar composition according to the present invention, by using an acid-resistant cement-based binder and a polymer emulsion excellent in durability, high flowability, elasticity, adhesive strength, strength and durability are greatly improved.

In addition, by using a cement-based binder, it is excellent in strength and durability, especially acid resistance, which can prevent corrosion of concrete due to chemical erosion such as the bottom of a barn and sewage pipes, thereby significantly reducing the maintenance cost used therein. .

In addition, by using fine aggregates in which dolomite, biotite, biotite, silica siliceous sand, etc. having excellent far-infrared effect are mixed, excellent heat retention and strength, and excellent durability against acid, salt, and the like.

In addition, the use of carbon black, etc., in the manufacture of floor finishing materials ensures excellent thermal conductivity and thermal insulation. The use of titanium oxide ensures self-cleaning function and contributes to maintaining the environment-friendly livestock and reducing livestock mortality. There is a number.

Hereinafter, preferred embodiments of the present invention will be described in detail. However, the following embodiments are provided to those skilled in the art to fully understand the present invention, and may be modified in various forms, and the scope of the present invention is limited to the embodiments described below. It doesn't happen.

Environmentally friendly cement mortar composition having excellent thermal insulation and durability according to a preferred embodiment of the present invention is 25 to 60% by weight cement-based binder, and 0.1 to 15% by weight polymer emulsion for improving pot life, workability, elasticity, flowability and durability %, And 35 to 70 weight% of fine aggregates.

The polymer emulsion is used to improve pot life, workability, elasticity, flowability and durability, acrylic emulsion for inducing bonding between inorganic materials, polyvinylacetate latex for improving adhesion, toughness and heat resistance, and improved acid resistance. Siloxane emulsions, and aminoplast emulsions for improving strength and durability. In addition, the polymer emulsion may further include a mixture of starch and methyl cellulose in a weight ratio of 0.2 to 0.4: 0.6 to 0.8 to provide a cohesive force and material separation resistance to form a stable concrete structure. . In addition, the polymer emulsion may further include an antifoaming agent to remove the bubbles in the polymer emulsion to increase the strength and durability. In addition, the polymer emulsion may further include a water reducing agent to reduce the water-cement ratio to improve strength and durability.

The polymer emulsion is preferably contained 0.1 to 15% by weight in the cement mortar composition. When the content of the polymer emulsion is more than 15% by weight, the viscosity is lowered, so that material separation is likely to occur, and the hydration reaction may be delayed to lower the early compressive strength and lower the price competitiveness. And when the content of the polymer emulsion is less than 0.1% by weight, toughness, fluidity and durability may be lowered.

When the acrylic emulsion is contained in the polymer emulsion, the bonding strength, adhesion and durability between the inorganic substances are improved. The acrylic emulsion is preferably contained in the polymer emulsion 70 to 95% by weight. When the content of the acrylic emulsion is less than 70% by weight, the effect of improving the bonding strength, adhesion and durability between the inorganic substances is weak, the content of the acrylic emulsion is 95% by weight If the percentage is exceeded, it is difficult to expect further adhesion and durability improvement effects and it is not economical.

The polyvinylacetate latex is used to improve the adhesion and heat resistance of the cement mortar composition. The polyvinylacetate latex is preferably incorporating 1 to 10% by weight in the polymer emulsion. When the content of the polyvinylacetate latex exceeds 10% by weight, the performance of the cement mortar composition may be improved but the price may be lowered. If the content of vinyl acetate latex is less than 1% by weight, the workability of the cement mortar composition is improved, but the strength and durability may be degraded.

The siloxane emulsion is used to lower the viscosity of the cement mortar composition to maintain workability as well as to improve ductility properties. In addition, it is excellent in acid and alkali resistance to improve the strength. The siloxane emulsion is preferably incorporating 1 to 10% by weight in the polymer emulsion. When the content of the siloxane emulsion exceeds 10% by weight, the performance of the cement mortar composition may be improved, but the price competitiveness may be reduced, and the content of the siloxane emulsion may be reduced. If less than 1% by weight, the workability of the cement mortar composition is improved, but acid resistance and strength may be reduced.

The aminoplast emulsions are used to improve the strength and durability of cement mortar compositions. The aminoplast emulsion is preferably incorporating 0.1 to 10% by weight in the polymer emulsion. When the content of the aminoplast emulsion exceeds 10% by weight, the performance of the cement mortar composition may be improved but the price may be lowered. If the content of the frost emulsion is less than 0.1% by weight, the strength and durability of the cement mortar composition may be lowered.

The starch and methyl cellulose mixture may contribute to forming a stable concrete structure by providing fluidity, cohesive force and material separation prevention, and incidentally, such as preventing water contamination and protecting steel reinforcement of concrete structure by excellent cohesion. It can be effective. The starch and methylcellulose mixture is preferably contained in the polymer emulsion 0.1 to 5% by weight. When the content of the starch and methyl cellulose mixture exceeds 5% by weight, the viscosity of the cement mortar composition may be increased, and workability may be reduced.When the content of the starch and methyl cellulose mixture is less than 0.1% by weight, the cement The workability of the mortar composition is improved, but material separation may occur. The starch and methyl cellulose mixture is a mixture of starch and methyl cellulose in a weight ratio of 0.2 to 0.4: 0.6 to 0.8 in order to give a cohesive force and preventing material separation to form a stable concrete structure desirable.

The antifoaming agent is used to increase the strength and durability by removing bubbles in the polymer emulsion. In addition, when the antifoaming agent is added to the polymer emulsion may impart an air entrainment effect to improve workability and pot life. It is preferable that the said defoaming agent is contained 0.01 to 2 weight% in a polymer emulsion. The antifoaming agent may be an alcoholic antifoaming agent, a silicone antifoaming agent, a fatty acid antifoaming agent, an oil antifoaming agent, an ester antifoaming agent, an oxyalkylene antifoaming agent, or the like. The silicone antifoaming agent includes dimethylsilicone oil, polyorganosiloxane, fluorosilicone oil and the like. The fatty acid antifoaming agent includes stearic acid, oleic acid and the like. The oil-based defoamer includes kerosene, animal and vegetable oils, castor oil and the like. The ester antifoaming agent may include solitol trioleate, glycerol monoricinoleate, and the like. Examples of the oxyalkylene antifoaming agent include polyoxyalkylene, acetylene ethers, polyoxyalkylene fatty acid esters, polyoxyalkylene alkylamines, and the like. The alcoholic antifoaming agent includes glycol and the like.

The water reducing agent is used to reduce the water-cement ratio to improve strength and durability and to secure the fluidity of the polymer emulsion. The addition of a water reducing agent to the polymer emulsion reduces the water-cement ratio. The water reducing agent is preferably contained in 0.01 to 2% by weight in the polymer emulsion. The water reducing agent may be a polycarboxylic acid-based, melamine-based or naphthalene-based water reducing agent, but naphthalene-based and melamine-based may reduce the strength of the composition and lower workability and pot life compared to the polycarboxylic acid-based strength of the composition, It is preferable to use a polycarboxylic acid type reducing agent that does not lower workability and pot life.

The cement-based binder usually includes cement, alumina cement, calcium sulfoaluminate hardwood, hollow silica powder, blast furnace slag, bottom ash and hollow nylon fibers. The cement binder is usually 10 to 50% by weight cement, 5 to 30% by weight alumina cement, 0.5 to 15% by weight calcium sulfoaluminate, 0.5 to 15% by weight hollow silica powder, 0.1 to 15% by weight blast furnace slag, bottom It is preferable to contain 0.1 to 15% by weight of ash and 0.01 to 3% by weight of hollow nylon fibers. The cement-based binder may further include 0.01 to 2% by weight of a reducing agent for improving the strength and durability by reducing the water-cement ratio. In addition, the cement-based binder may further comprise 0.01 to 2% by weight of a retarder to secure workability for a predetermined time and delay the rapid curing.

The normal cement is preferably used to meet the KS standards. The normal cement is preferably contained 10 to 50% by weight in the cement-based binder.

The alumina cement is used to improve chemical resistance, in particular acid resistance. The alumina cement is preferably contained 5 to 30% by weight in the cement binder. Increasing the weight ratio of the alumina cement shows fast curing properties, when the content is less than 5% by weight, the strength and acid resistance is lowered, and when it exceeds 30% by weight, good physical properties can be obtained due to the fast curing properties, but the manufacturing cost It is not economical because it is high.

The calcium sulfoaluminate is an inorganic quick-hard mineral material which is added to increase hydration reactivity and suppress cracking. When calcium sulfoaluminate is contacted with water, it reacts with water to form ettringite hydrate, which is mixed with cement. When it is possible to obtain excellent compressive strength in a short time. The calcium sulfoaluminate is preferably contained in 0.5 to 15% by weight in the cement binder. Increasing the weight ratio of the calcium sulfoaluminate exhibits fast curing characteristics. If the content is less than 0.5% by weight, the effect of suppressing strength and cracking is insignificant. It is not economical due to the high production cost.

The hollow silica powder, blast furnace slag and bottom ash are used to improve latent hydraulic properties, long-term strength development and durability. As the weight ratio of hollow silica powder, blast furnace slag and bottom ash increases, premature strength decreases, but long-term strength expression and durability increase. The hollow silica powder is preferably contained in the cement binder binder 0.5 to 15% by weight. In addition, the blast furnace slag is preferably contained 0.1 to 15% by weight in the cement binder. In addition, the bottom ash is preferably contained 0.1 to 15% by weight in the cement-based binder.

The water reducing agent is used to improve the strength and durability by reducing the water-cement ratio of the cement mortar composition. The water reducing agent may use a polycarboxylic acid-based, melamine-based, aminosulfonic acid-based or naphthalene-based fluidizing agent. Melamine-based or naphthalene-based sensitizers are less effective in improving strength and durability than polycarboxylic acid sensitizers, do not have a significant effect of reducing the water-cement ratio, and when mixed with polymer emulsions, foaming occurs, resulting in poor miscibility. There are disadvantages. Therefore, it is preferable to use a polycarboxylic acid type reducing agent, and it is preferable that 0.01-2 weight% is contained in a cement type binder.

The retardant may be used to secure workability for a certain time and delay the hardening. The retarder is preferably contained in 0.01 to 2% by weight in the cement binder. As the retardant, generally well-known substances can be used, for example, sugars such as glucose, glucose, dextrin, gluconic acid, malic acid, citric acid, citric acid or salts thereof, aminocarboxylic acids or their Salts, phosphonic acids or derivatives thereof, polyhydric alcohols such as glycerin, and the like.

The fine aggregate preferably includes 40 to 80% by weight of silica siliceous sand, 5 to 30% by weight of dolomite, 1 to 20% by weight of biotite, 1 to 20% by weight of mica, and 1 to 20% by weight of light aggregate. In general, aggregates are divided into fine aggregates and coarse aggregates, and coarse aggregates mean aggregates exceeding 5 mm in particle size, and fine aggregates in the following are used to mean aggregates having a particle diameter of 5 mm or less as compared with coarse aggregates. By using fine aggregates in which dolomite, biotite, biotite, silica siliceous sand, etc. having excellent far-infrared effect are mixed, it is excellent in heat retention and strength, and excellent in durability against acid, salt, and the like.

The silica siliceous sand is preferably a particle size of No. 6 to No. 8 yarn (0.05 to 0.6 mm). If the particle size of the siliceous silica sand is larger than this, there is a fear that the fluidity of the floor finish is lowered, if it is smaller than this may reduce the workability of the floor finish. Silica silicate sand is preferably contained 40 to 80% by weight in the fine aggregate.

The dolomite, biotite, and biotite are aggregates that emit far-infrared rays and are used to increase far-infrared rays from the cement mortar composition to enhance bioactivity. The dolomite is preferably contained 5 to 30% by weight in the fine aggregate. In addition, the biotite is preferably contained 1 to 20% by weight in the fine aggregate. In addition, the biotite is preferably contained 1 to 20% by weight in the fine aggregate.

The lightweight aggregate is used to improve the thermal insulation effect of the cement mortar composition. The lightweight aggregate preferably includes at least one of pumice, expanded clay, expanded shale, expanded slag prepared by quenching coal ash or slag. Hereinafter, light aggregate is used to mean a fine aggregate having a specific gravity of 2.0 or less as a low specific gravity among fine aggregates. These lightweight aggregates usually have a specific gravity of about 1.6. Light weight aggregate has the characteristics of light weight, excellent insulation and sound insulation. The light weight aggregate is preferably contained 1 to 20% by weight in the fine aggregate.

Hereinafter, a method for producing a cement mortar composition according to a preferred embodiment of the present invention.

Cement mortar composition according to a preferred embodiment of the present invention is 25 to 60% by weight of the cement-based binder, 35 to 70% by weight of the aggregate and 0.1 to 15% by weight of the polymer emulsion by mixing in a continuous mixer or the like for a predetermined time (for example 1 to 10 For a minute).

Hereinafter, a method of manufacturing a factory-type floor finish using the cement mortar composition described above is provided.

According to a preferred embodiment of the present invention, there is provided a method for manufacturing a factory-type floor finishing material, in which the above-mentioned cement mortar composition is poured into a mold formwork, and 5-30% by weight of the cement-based binder described above on the cement mortar composition. 1 to 30% by weight of the polymer emulsion, 1 to 25% by weight, dolomite 1 to 25%, biotite 1 to 25%, biotite 1 to 25% by weight, titanium oxide (TiO ₂ ) 0.1 to 15% by weight and carbon black 0.1 to 10% by weight And pouring the mixed composition to a thickness of 0.5 to 3 cm, forming and shaking the poured composition by vibrating and compressing it, and surface finishing and drying the formed product to form a floor finish. Factory product type floor finishing material refers to floor finishing material that is manufactured industrially in factories and can be used in construction sites, civil works, barns, etc. The use of carbon black, etc., in the manufacture of floor finishing materials ensures excellent thermal conductivity and thermal insulation. The use of titanium oxide ensures self-purifying function, which contributes to maintaining the environment of the livestock and reducing livestock mortality. .

According to a preferred embodiment of the present invention, a method of manufacturing a block includes: pouring the cement mortar composition into a mold form, vibrating and compressing the poured cement mortar composition, and surface finishing and drying the formed product. To form a block. Here, the block means a block product which is manufactured industrially in factories and the like, including a pavement block, a road pavement block, a retaining wall block, a river bank block, a building block, and the like.

Hereinafter, examples of the cement mortar composition according to the present invention are described in more detail, and the present invention is not limited to the following examples.

≪ Example 1 >

Cement mortar composition was prepared by stirring 45% by weight cement-based binder, 45% by weight aggregate and 10% by weight polymer emulsion in a continuous mixer for 2 minutes.

In this case, the cement-based binder is usually cement 48.5% by weight, alumina cement 10% by weight, calcium sulfoaluminate 10% by weight, hollow silica powder 10% by weight, blast furnace slag 10% by weight, bottom ash 10% by weight, hollow nylon fiber 0.5% by weight, 0.5% by weight of retardant and 0.5% by weight of reducing agent were used in combination. Citric acid was used as the retardant. The water reducing agent used a polycarboxylic acid-based water reducing agent. The polymer emulsion was used by mixing 95% by weight acrylic emulsion, 3% by weight polyvinylacetate latex, 1% by weight siloxane emulsion, and 1% by weight aminofrast emulsion.

<Example 2>

Cement mortar composition was prepared by stirring 45% by weight cement-based binder, 45% by weight aggregate and 10% by weight polymer emulsion in a continuous mixer for 2 minutes.

In this case, the cement-based binder is usually cement 48.5% by weight, alumina cement 10% by weight, calcium sulfoaluminate 10% by weight, hollow silica powder 10% by weight, blast furnace slag 10% by weight, bottom ash 10% by weight, hollow nylon fiber 0.5% by weight, 0.5% by weight of retardant and 0.5% by weight of reducing agent were used in combination. Citric acid was used as the retardant. The water reducing agent used a polycarboxylic acid-based water reducing agent. The polymer emulsion was used by mixing 90% by weight acrylic emulsion, 5% by weight polyvinylacetate latex, 3% by weight siloxane emulsion, and 2% by weight aminofrast emulsion.

<Example 3>

Cement mortar composition was prepared by stirring 45% by weight cement-based binder, 45% by weight aggregate and 10% by weight polymer emulsion in a continuous mixer for 2 minutes.

In this case, the cement-based binder is usually cement 48.5% by weight, alumina cement 10% by weight, calcium sulfoaluminate 10% by weight, hollow silica powder 10% by weight, blast furnace slag 10% by weight, bottom ash 10% by weight, hollow nylon fiber 0.5% by weight, 0.5% by weight of retardant and 0.5% by weight of reducing agent were used in combination. Citric acid was used as the retardant. The water reducing agent used a polycarboxylic acid-based water reducing agent. The polymer emulsion was used by mixing 85% by weight acrylic emulsion, 8% by weight polyvinylacetate latex, 4% by weight siloxane emulsion, and 3% by weight aminofrast emulsion.

In order to more easily understand the characteristics of Examples 1 to 3 above, comparative examples that can be compared with the embodiments of the present invention are presented, and Comparative Examples 1 and 2, which will be described later, are commonly used cements. A mortar composition and a polymer cement mortar composition are presented.

Comparative Example 1

Normally 45% by weight cement, 45% by weight aggregate and 10% by weight water were stirred in a continuous mixer to prepare a normal cement mortar composition.

Comparative Example 2

Normally 45% by weight cement, 45% by weight aggregate and 10% by weight acrylic emulsion were stirred in a continuous mixer to prepare a polymer cement mortar composition.

The following test examples show the experimental results comparing the characteristics of the examples according to the invention with the characteristics of Comparative Examples 1 and 2 to more easily understand the characteristics of Examples 1 to 3 according to the present invention .

<Test Example 1>

In order to compare the physical properties of the cement mortar composition prepared according to Examples 1 to 3 of the present invention and the cement mortar composition prepared in Comparative Examples, the cement mortar composition of Examples 1 to 3 described above The cement mortar compositions prepared according to Comparative Example 1 and Comparative Example 2 were subjected to a compressive strength test by KS F 2405 (mortar compressive strength test method), the results are shown in Table 1 below. In addition, the flexural strength test was performed according to KS F 2408 (mortar bending test method), tensile strength test was performed according to KS F 2423 (mortar tensile test method), JIS A 6916 (base material for finishing coating material) By measuring the adhesive strength of the specimen by the results are shown in Table 1 below.

Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2
burglar
(kgf / cm2) warp 84 90 98 50 79 compression 468 492 519 429 441 Seal 48 54 6 30 40 adhesion 23 28 30 15 21

As shown in Table 1, the bending, compression, tensile and adhesive strength of the cement mortar composition (Example 1, Example 2 and Example 3) prepared according to the present invention was prepared in Comparative Examples 1 and 2 Significantly higher than the cement mortar composition.

It was confirmed that the cement mortar composition prepared according to Examples 1 to 3 of the present invention is superior in strength in comparison with the cement mortar composition prepared in Comparative Examples.

<Test Example 2>

The cement mortar composition prepared according to Examples 1 to 3 and the cement mortar composition prepared according to Comparative Example 1 and Comparative Example 2 were measured for dry shrinkage by KS F 2424 (test method for changing the length of concrete). The results are shown in Table 2 below.

Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Dry Shrinkage (× 10 ^-4 ) 0.8 0.5 0.30 2.8 1.2

As shown in Table 2 above, the cement mortar composition prepared according to Examples 1 to 3 has a reduced shrinkage effect by reducing the amount of dry shrinkage compared to the cement mortar compositions prepared according to Comparative Examples 1 and 2 I could confirm it.

<Test Example 3>

Measurement of Absorption Rate of Cement Mortar Compositions Prepared According to Examples 1 to 3 and Cement Mortar Compositions Prepared According to Comparative Examples 1 and 2 According to JIS A 1171 (Test Method of Polymer Cement Mortar) The results are shown in Table 3 below. If the absorption rate is high, if the impurities or water penetrates into the concrete, the porosity increases in the concrete, thereby causing deterioration of the structure and causing breakage.

division Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Absorption rate (%) 0.9 0.6 0.5 3.2 1.8

As shown in Table 3 above, the cement mortar composition prepared according to Examples 1 to 3 had a lower water absorption than the cement mortar compositions prepared according to Comparative Examples 1 and 2.

<Test Example 4>

Cement mortar compositions prepared according to Examples 1 to 3 and cement mortar compositions prepared according to Comparative Examples 1 and 2 were tested according to JIS A 1171 (Test Method of Polymer Cement Mortar), and the results were as follows. It is shown in Table 4 below.

Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Chloride ion penetration depth (mm) 1.1 0.9 0.6 2.2 1.6

As shown in Table 4 above, the cement mortar composition prepared according to Examples 1 to 3 has a smaller chloride ion penetration depth than that of the cement mortar compositions prepared according to Comparative Examples 1 and 2, thereby resisting salt damage. It was confirmed that this is high.

&Lt; Test Example 5 >

Cement mortar compositions prepared according to Examples 1 to 3 and cement mortar compositions prepared according to Comparative Examples 1 and 2 were tested according to JIS A 1171 (Test Method of Polymer Cement Mortar), and the results were as follows. It is shown in Table 5 below.

Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Neutralization Depth (mm) 0.7 0.4 0.2 1.8 1.0

As shown in Table 5 above, the cement mortar composition prepared according to Examples 1 to 3 has a smaller neutralization penetration depth compared to the cement mortar compositions prepared according to Comparative Examples 1 and 2, thereby showing resistance to neutralization. It was confirmed that high.

<Test Example 6>

2% of the cement mortar composition prepared according to Examples 1 to 3 and the cement mortar composition prepared according to Comparative Examples 1 and 2 according to Japanese Industrial Standards [Method for testing chemical resistance by solution deposition of concrete] The test results of the chemical resistance test were immersed in 28 days of test specimens with an aqueous solution of hydrochloric acid, 5% sulfuric acid, and 45% sodium hydroxide as a test solution.

division Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 % Change in weight Hydrochloric acid -2.0 -1.6 -1.3 -10.0 -3.1 Sulfuric acid -0.3 -0.2 0 -2.1 -0.8 Sodium hydroxide +0.6 +0.8 +1.0 +0.1 +0.4

As shown in Table 6 above, the cement mortar composition prepared according to Examples 1 to 3 shows less weight change rate for chemical resistance than the cement mortar compositions prepared according to Comparative Example 1 and Comparative Example 2. It was confirmed that the resistance to.

<Test Example 7>

The cement mortar compositions prepared according to Examples 1 to 3 and the cement mortar compositions prepared according to Comparative Examples 1 and 2 were measured according to the method specified in KS F 2456 according to the method specified in KS F 2456. 7 is shown. Freeze-thawing refers to the freezing and melting of water absorbed in the capillary to concrete, and repeated freeze-thawing causes fine cracks in the concrete structure, resulting in deterioration in durability. Table 7 shows the durability index of each of the Examples and Comparative Examples according to the freeze thaw resistance test.

division Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Durability index 91 93 94 64 90

As shown in Table 6, the cement mortar composition prepared according to Examples 1 to 3 is significantly higher durability index than the cement mortar compositions prepared according to Comparative Example 1 and Comparative Example 2, so that the durability is improved. Able to know.

<Test Example 8>

The cement mortar composition prepared according to Examples 1 to 3 and the cement mortar composition prepared according to Comparative Example 1 and Comparative Example 2 were measured according to the method specified in KS L 9016. Indicated. Table 8 shows the thermal conductivity of each of the Examples and Comparative Examples according to the thermal conductivity test.

division Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Thermal conductivity
(W / mk) 0.50 0.51 0.51 1.15 1.05

As shown in Table 8, the cement mortar composition prepared according to Examples 1 to 3 is significantly lower thermal conductivity than the cement mortar compositions prepared according to Comparative Example 1 and Comparative Example 2, it is found that the thermal insulation is improved Can be.

As mentioned above, although preferred embodiment of this invention was described in detail, this invention is not limited to the said embodiment, A various deformation | transformation by a person of ordinary skill in the art within the scope of the technical idea of this invention is carried out. This is possible.

Claims (10)

25 to 60 wt% of cement-based binder, 0.1 to 15 wt% of polymer emulsion, and 35 to 70 wt% of fine aggregate,
The polymer emulsion is 70 to 95% by weight acrylic emulsion to improve the bonding strength and adhesion between inorganic materials, 1 to 10% by weight polyvinylacetate latex to improve adhesion and heat resistance, siloxane emulsion 1 to improve acid resistance and alkali resistance 10% by weight and 0.1-10% by weight of an aminofrast emulsion for improving strength and durability. A cement mortar composition having excellent acid resistance and thermal insulation.
According to claim 1, wherein the cement binder is usually 10 to 50% by weight cement, 5 to 30% by weight alumina cement, 0.5 to 15% by weight calcium sulfoaluminate, 0.5 to 15% by weight hollow silica powder, 0.1 to blast furnace slag A cement mortar composition having excellent acid resistance and thermal insulation, comprising 15 wt%, bottom ash 0.1-15 wt%, and hollow nylon fiber 0.01-3 wt%.
According to claim 1, wherein the fine aggregate is acid-resistant, including 40 to 80% by weight silica siliceous sand, 5 to 30% by weight, dolomite 1 to 20% by weight, biotite 1 to 20% by weight and light aggregate 1 to 20% by weight And cement mortar composition excellent in heat retention.
The method of claim 1, wherein the polymer emulsion further comprises a mixture of starch and methylcellulose in a weight ratio of 0.2 to 0.4: 0.6 to 0.8 in order to provide a cohesive force and material separation resistance to form a stable concrete structure The cement mortar composition having excellent acid resistance and thermal insulation, wherein the starch and methyl cellulose mixture is contained in the polymer emulsion in an amount of 0.1 to 5 wt% based on 100 wt% of the polymer emulsion.
The method of claim 1, wherein the polymer emulsion further comprises an antifoaming agent for removing the bubbles in the polymer emulsion to increase the strength and durability, the antifoaming agent is contained in the polymer emulsion 0.01 to 2% by weight relative to 100% by weight of the polymer emulsion Cement mortar composition excellent in acid resistance and thermal insulation.
The method of claim 1, wherein the polymer emulsion further comprises a reducing agent for improving the strength and durability by reducing the water-cement ratio, the reducing agent is contained in the polymer emulsion 0.01 to 2% by weight relative to 100% by weight of the polymer emulsion Cement mortar composition excellent in acid resistance and thermal insulation.
The method of claim 1, wherein the cement binder further comprises a retarder to secure workability for a predetermined time and to delay the rapid hardening, the retardant 0.01 to 0.01% by weight based on the cement binder in the cement binder Cement mortar composition excellent in acid resistance and thermal insulation, characterized in that 2% by weight.
According to claim 1, wherein the cement-based binder further comprises a reducing agent for improving the strength and durability by reducing the water-cement ratio, the reducing agent is contained in the cement-based binder 0.01 to 2% by weight relative to 100% by weight of the cement-based binder Cement mortar composition excellent in acid resistance and thermal insulation.
Pouring the cement mortar composition according to claim 1 on a mold formwork;
5 to 30% by weight of the cement-based binder according to claim 1, 1 to 30% by weight of the polymer emulsion according to claim 1, 1 to 25% by weight, dolomite 1 to 25% by weight, biotite 1 Casting a composition having a mixture of 25 wt% to 0.1 wt% of titanium oxide (TiO ₂ ) and 0.1 wt% to 10 wt% of carbon black to a thickness of 0.5 to 3 cm;
Vibrating and compressing the poured composition to form it; And
A method of manufacturing a floor finish having excellent acid resistance and thermal insulation, comprising the step of surface finishing and drying the molded product to form a floor finish.
Pouring the cement mortar composition according to claim 1 on a mold formwork;
Vibrating and compressing the poured mortar composition; And
A method for producing a block having excellent acid resistance and thermal insulation, comprising the step of surface finishing and drying the molded product to form a block.