KR101086851B1 - Waterproof material composition and manufacture of same - Google Patents

Abstract

PURPOSE: A waterproof material composition and a method for manufacturing the same are provided to improve the adhesion and the durability of the composition without a primer by including silica, high early-strength Portland cement, powdered polymer, anhydrous gypsum, silica fume, a water reducing agent, CSA, and a powdered antifoaming agent. CONSTITUTION: A waterproof material composition includes 45-50 weight% of silica, 33-37 weight% of high early-strength Portland cement, 3-9 weight% of powdered polymer, 1.5-3 weight% of anhydrous gypsum, 1.5-3 weight% of silica fume, 1-3 weight% of a water reducing agent, 1.5-3.5 weight% of calcium sulfur aluminate(CSA) cement, and 1.5-3 weight% of a powdered antifoaming agent. A method for manufacturing the waterproof material composition implements a dry stirring process for 15-20 minutes after the silica, the high early-strength Portland cement, the powdered polymer, the anhydrous gypsum, the silica fume, the water reducing agent, the CSA cement, and the powdered antifoaming agent are successively mixed.

Description

Waterproofing material composition and manufacturing method thereof {WATERPROOF MATERIAL COMPOSITION AND MANUFACTURE OF SAME}

The present invention relates to a waterproofing material composition and a method for manufacturing the same, wherein the three cements, the water reducing agent, the anhydrous gypsum, the silica sand, the silica fume, the powder antifoaming agent, the CSA and the powder polymer satisfying the Portland specification have an adhesive composition, characterized in that a constant mixing ratio. And it is excellent in durability and easy to install, and does not require a primer, but also relates to a waterproof composition and a method for producing the excellent waterproofing performance by a single application.

Compositions made of concrete, such as buildings, are often exposed to the natural environment. In this case, the concrete composition is easily weathered by contact with moisture or acid rain in the air, and its appearance is also unsightly, resulting in shortening of the life of the composition.

In particular, in cold weather, the moisture contained in the concrete composition freezes, thus increasing the volume of the whole composition and decreasing the volume again when thawed. Repeating this process of increasing and decreasing volume causes concrete to corrode, loses its beautiful appearance and greatly shortens the life of the composition itself. Furthermore, the presence of moisture on the surface of the concrete composition causes the growth of microorganisms, which also causes corrosion of the concrete and shortens the life of the composition itself.

For these reasons, it is necessary to prevent the water from penetrating or wetting the concrete composition, thereby extending the life of the concrete composition and maintaining a beautiful appearance, and also to the economic benefit of using the composition for a long time. have.

The waterproofing method of buildings can be largely classified into liquid waterproofing using cement, sheet waterproofing using synthetic polymers, waterproofing of coating film, and waterproofing asphalt, and have unique areas according to the materials used. In particular, liquid waterproofing using cement is mainly applied to the basement and indoor waterproofing of apartment houses, general stores, and detached houses. Cement liquid waterproofing means adding waterproofing liquid to cement and mortar to express waterproofing to impart water repellency and water tightness of hardened body. There are five major methods used to express these characteristics.

First, the method of increasing the resistance to permeation by densifying the hardening body by activating the initial hydration reaction of cement, such as sodium silicate, calcium chloride, alumina silicate.

Second, a method of increasing the watertightness of tissues by converting calcium hydroxide, which is a soluble hydrate of cement, into an insoluble salt, or by transferring to calcium silicate hydrate.

Third, a method for preventing absorption by forming a water-repellent, impermeable film in the cured body.

Fourth, the method of waterproofing by reducing the required amount by improving the workability, thereby increasing the water-tightness of the cured body to densify.

Fifth, there is a method of physically filling the pores of the hydrated tissue by adding fine mineral powder, such as silica fume, fly ash, silica-alumina fine powder, and the like.

Most of the waterproofing materials for cement currently used are a combination of various components for achieving the above-mentioned performance. That is, a method of adding a hardening accelerator, a surfactant, a polymer resin, and an active silica fine powder to a high fatty acid metal salt subject mainly to impart water repellency (Patent Publication 79-621, 87-1543, 90-5403), to a high fatty acid metal salt solution. A method for preparing a film forming aid such as a polymer resin, a plasticizer, a curing accelerator, and a paraffin (Patent Publications 83-20, 84-2177, 82-2073), and a higher fatty acid for improving its dispersibility in higher fatty acid metal salts. And a method of adding a surfactant such as a polyhydric alcohol ester or a naphthalene sulfonic acid formaldehyde high condensate system (Japanese Patent Publication 54-124021).

Most of the waterproofing compositions shown up to now are prepared by adding a fatty acid-based metal salt for imparting water repellency as a basic composition, and adding a curing accelerator, a dispersing agent, a polymer resin, etc. to enhance the strength and watertightness of the cured product.

However, these waterproof materials contribute to the waterproofing of the cement, but the formation of the target waterproof layer is accompanied by the following problems in terms of materials and methods of use.

Since most of the waterproof material in powder form is mixed with cement and mortar in the field, the difference in specific gravity between the materials themselves, the phenomenon of floating on the surface when mixing with water due to the heterogeneity of the mixing, the deterioration of the waterproof performance due to the ubiquity of the ingredients, Problems such as deterioration of the surface and inhomogeneity of performance occur. In addition, the components of the fatty acid metal salt system to be used have a disadvantage in that the mixing time with water is difficult to work.

Liquid type waterproofing material is very good in dispersibility than powder form by diluting with water, but most of them are based on melted fatty acid metal salts with high water repellency. There is a possibility that the structure becomes porous, and the hydration of the cement is delayed, resulting in a decrease in strength and a delay in condensation. In addition, the water-repellent liquids are often absorbed by the water-repellent components in the concrete matrix to be lifted between the waterproof layer and the concrete matrix.

The waterproofing method using cement is not determined by the performance of the waterproofing material used, but only the shrinkage cracking, peeling, workability (use amount), water retention and water repellency, and compactness of the cement mortar waterproofing layer show the desired performance. Therefore, in order to waterproof the cement, the appropriate conditions for manufacturing cement mortar should be preceded in consideration of shrinkage cracking and peeling prevention, water retention, and workability. This property can not be solved only by the waterproofing material component used, it can be made by the selection of silica sand, cement compounding ratio, the use of physical properties improver and proper mixing in the mortar during waterproof construction.

However, in the past, since the mixing of the waterproofing liquid, cement and silica sand is artificially performed by the worker in the field, the waterproofing performance is influenced by various external factors such as the skill of the contractor, the conditions of use, the mixing ratio with the silica used, and the mixing property. There is a problem that a deviation occurs.

In the existing waterproof construction, the waterproof mortar finish is applied to the cement paste with a thickness of 1 to 2mm, which is mixed with the waterproofing liquid by cement alone before the mortar waterproofing to enhance the waterproofing performance. This is to supplement the performance of adhesion and compactness by applying cement paste because the density, water repellency, permeability, and adhesion to sand sand of waterproof mortar are greatly inferior. Accordingly, there is a problem of increasing the construction thickness and repeating the construction process.

Therefore, the present inventors continue to research to develop a waterproof material composition excellent in adhesion and durability than the existing waterproof mortar and easy to use so that the general public can also be used, not only need a primer, but also excellent waterproof performance by a single application. One result.

An object of the present invention is to provide an excellent waterproofing material composition excellent in adhesion and durability, easy to install, not only need a primer, but also excellent waterproofing performance by a single application.

Another object of the present invention relates to a method for producing the waterproofing material composition.

In order to achieve the above object, in the present invention, 33 to 37% by weight of three kinds of cement, 1 to 3% by weight reducing agent, 1.5 to 3% by weight of anhydrous gypsum, 45 to 50% by weight of silica sand, 1.5 to 3% by weight of silica fume, powder Anti-foaming agent provides 1.5 to 3% by weight, CSA (Calcium Sulfur Aluminate) cement 1.5 to 3.5% by weight and powder polymer 3 to 9% by weight to provide a waterproof material composition.

In order to achieve the above another object, in the present invention, as a method of manufacturing the waterproofing material composition, by mixing the components in the compounding order of silica sand-three cement-powder polymer-anhydrite-silica fume-reducing agent-CSA-powder defoamer Provided is a method for producing a waterproofing material composition, characterized in that the gunbi beam is performed at a low speed of 20 rpm for 15 to 20 minutes.

The waterproofing composition according to the present invention has excellent adhesiveness and durability compared to the existing waterproof mortar, and can be applied by a brush, a plastering knife, or a spray, and thus can be easily constructed by the general public. It is expected to be very useful in the art by reducing the labor cost and air due to excellent waterproof performance.

The technical terms and scientific terms used in the present invention can be construed as meaning ordinary meanings understood by those of ordinary skill in the art without departing from the scope of the present invention.

The waterproofing material composition of the present invention is 33 to 37% by weight of three kinds of cement, 1 to 3% by weight, gypsum 1.5 to 3%, silica sand 45 to 50%, silica fume 1.5 to 3% by weight, powder antifoam 1.5 to 3% %, 1.5 to 3.5% by weight of Calcium Sulfur Aluminate (CSA) cement and 3 to 9% by weight of powdered polymer.

The three kinds of cement used in the waterproofing composition of the present invention satisfy the specifications of three kinds of crude steel of Portland cement of KS L 5201, so the seven days strength of one kind of cement is expressed in three days, so construction that requires shortening of air is required. Of course, when the secondary product is applied, there is an advantage of lowering the manufacturing cost by improving mold rotation rate and curing cost. In particular, it is characterized by expressing high strength during middle stage nursing. In the present invention, Chemius Korea Co., Ltd. using the Portland cement specifications are shown in Table 1 below.

division division KS Standard Properties Powder 3,300 or more 3,000 Setting time First minute 60 or more 340 Termination (time) below 10 8:30
Compressive strength
kgf / ㎠ 3 days 130 or more 160 7 days 250 or more 230 28 days 280 or more 360 91 days 310 and above 530
Mineral composition

(%) C₃S - 47 C₂S - 21 C₃A 8 or less 11 C₄AF - 9 C₄S + C₃A 58 or less -

The main components of Portland cement are calcium oxide (CaO), silica (SiO 2), aluminum oxide (Al 2 O 3), and ferric oxide (Fe 2 O 3) .The raw materials containing these components are properly mixed and pulverized and then fired in a clinker. It is pulverized by adding an appropriate amount of gypsum. Cement can be manufactured as long as a cement main component exists in a suitable ratio. However, in reality, it is impossible for only these components to be present in an appropriate ratio. Therefore, by using several raw materials, additional components such as magnesium oxide (MgO), alkali (K2O, Na2O), and sulfuric anhydride (SO3) other than the main components are also present. Done. Its raw material is as follows.

① Limestone Raw Material

It is the most necessary raw material for cement production, accounting for about 95% of cement raw materials. Limestone can be used as the main component of CaCO3 content of about 80% (CaO 45%) or more. In addition to the main component, some other components such as SiO 2, Al 2 O 3, Fe 2 O 3, and MgO are included. Limestone differs in its composition by distribution area, but limestone for cement production needs to be suitable for firing conditions.

② Clay material (clay)

This raw material is used to supplement SiO2, Al2O3, Fe2O3, which are needed for cement production. In general, it is required to have a high SiO2 content, abundant Al2O3, low MgO and alkali content, and good crushability.

③ Silica Raw Material

This raw material is used as a supplement when the amount of SiO 2 is insufficient in clay raw materials. It is used to make cement with high silica rate, such as medium heat portland cement or low heat portland cement. Silica raw material is preferably a high SiO2 component of 80% or more, and particularly good grinding properties and reactivity. The sand contains about 70% SiO2.

④ Iron oxide raw material (iron ore)

This raw material is a by-product generated from steel mills and is used as the main raw material of Fe2O3 component in cement raw materials. Fe2O3 component easily combines with Al2O3 when firing clinker to facilitate firing reaction. Along with the MgO component, this is a very important component when controlling cement color.

⑤ Admixture

Used as a fluxing agent in cement production, it is used to lower the firing temperature or to increase the plasticity of raw materials when manufacturing high strength crude steel portland cement. However, care should be taken when using the product as it may cause plasticity or adverse effects on the product.

⑥ gypsum

Types of gypsum include refined gypsum, natural dihydrate gypsum, chemical anhydrous gypsum, natural anhydrous gypsum, and desulfurized gypsum. In order to control the solidification time and hardening time of cement, the small amount of gypsum is mixed with clinker to improve the stability of pulverized cement, and play a role of grinding aid and initial strength increase. If gypsum is added more than necessary, the setting time may be too late or the strength may be adversely affected. Therefore, an appropriate amount should be used, and the dosage should be adjusted according to the season.

The clinker of Portland cement is prepared by mixing and finely pulverizing raw materials of limestone, clay, silica, and iron oxide, and pre-cooling it in a firing furnace at a high temperature of about 1,250 to 1,450 ° C., followed by quenching with a cooler. In clinker, the quality of cement varies according to the difference in the formation, development, or transitional crystal lattice of clinker minerals according to the firing temperature, firing rate, and cooling method. Generally, clinker quenched by quenching at high temperature is good, but suitable calcination and cooling methods are necessary according to the properties of the raw materials (chemical conversion, powder, alkali, and other components).

Clinker mineral composition, a semi-finished product of Portland cement, is formed by the combination of four components: calcium oxide (CaO), silica (SiO 2), aluminum oxide (Al 2 O 3), and ferric oxide (Fe 2 O 3).

The clinker minerals thus formed are called alite (C3S), bellite (C2S), aluminate (C3A), and ferrite (C4AF) and affect the hydration and hardening of cement depending on the composition and structure of the clinker mineral.

In the present invention, the three types of cement are used in an amount of 33 to 37% by weight, and when the amount of the three types of cement is less than 33% by weight, the compactness of the hardened body is lowered and the resistance to permeability is lowered. Due to the use of cracks on the surface, the viscosity is increased, the workability is reduced.

An example of a water reducing agent used in the waterproofing composition of the present invention is Chemius Korea Co., Ltd. Chemius Melamine is a high performance water reducing agent mainly containing melamine-based condensates.

Anhydrous gypsum used in the waterproofing composition of the present invention can be used, for example, Chemius Korea Co., Ltd. as a crack prevention agent of cement mortar.

As the silica sand white silica sand used in the waterproofing composition of the present invention maintains a high quality of more than 98% purity has excellent strength and white color characteristics, for example, can be used Chemius Korea products.

Silica fume used in the waterproofing material composition of the present invention refers to ultra-fine particle by-products generated by mixing and floating in the exhaust gas when silicon alloys such as silicon or ferrosilicon are manufactured in an electric furnace, for example, may be used by Chemius Korea. .

Powder antifoaming agent used in the waterproofing composition of the present invention is a hydrocarbon polyglycol-based, it is possible to reduce the foam, control the excessive air volume when manufacturing or applying the building products, stable fine air to improve workability and reduce cracking It can be used, for example, Chemius Korea products.

Calcium Sulfur Aluminate (CSA) used in the waterproofing composition of the present invention is non-shrinkage, high strength, super hard cement having excellent corrosion resistance and water permeability, and corrosion resistant concrete is more resistant to acid, alkali, sewage and wastewater, seawater, etc. than general concrete. Refers to this large concrete, which is standardized by sulfate resistant cement in the US ASTM.

CSA cement is a crystal of ethringite (Ettringite, 3CaO, Al2O3, 3CaSO4, 32H2O), a sulfate hydrate that is highly resistant to the penetration of various ions such as SO42- and Cl- in the sewage, wastewater and seawater during the hydration reaction. It generates a large amount of corrosion resistance and water permeability is excellent.

In addition, CSA cement becomes non-shrinkable in the early stage of hydration because a large amount of needle crystals of ettringite (3CaO.Al2O3.3CaSO4.32H2O) is formed to completely fill the crystal voids in the cement structure. In addition, since CSA cement binds to an aluminate phase such as C3A contained in ordinary portland cement, which affects the initial coagulation hardening, coagulation hardening proceeds rapidly and exhibits high strength due to the expansion pressure of hydrate Ettringite. In the present invention, for example, Chemius Korea Co., Ltd. product is used.

Powder polymer used in the waterproofing material composition of the present invention is a dispersion material prepared by spray-drying the liquid resin in Vinnapas 8031H inorganic YV-based product is a product that becomes a stable liquid resin when dispersed in water. Powdered resin dispersed in water forms an irreversible polymer film that is insoluble in water after drying. It is possible to improve the adhesion tensile durability by mixing with cement, for example, in the present invention, the product of Chemicon Co., Ltd. is used.

The compounding ratio of the waterproofing material composition of the present invention is 33 to 37% by weight of three kinds of cement, 1 to 3% by weight, gypsum 1.5 to 3% by weight, silica sand 45 to 50%, silica fume 1.5 to 3% by weight, powder defoamer 1.5 to 3% by weight, 1.5 to 3.5% by weight of Calcium Sulfur Aluminate (CSA) cement and 3 to 9% by weight of powdered polymer, preferably 35% by weight of 3 kinds of cement, 2% by weight of reducing agent, 2.2% by weight of gypsum and 48% of silica sand %, Silica fume 2.1% by weight, powder defoamer 2.2% by weight, CSA (Calcium Sulfur Aluminate) cement 2.5% by weight and powder polymer 6% by weight.

The waterproofing composition of the present invention can be prepared by sufficiently carrying out the dry bib beam at a low speed of 20 rpm for 15 to 20 minutes in a blending order of silica sand-three cement-powder polymer-anhydrous gypsum-silica fume-sensitizer-CSA-powder defoamer.

The waterproofing composition according to the present invention has excellent adhesiveness and durability compared to the existing waterproof mortar, and can be applied by a brush, a plastering knife, or a spray, and thus can be easily constructed by the general public. It is expected to be very useful in the art by reducing the labor cost and air due to excellent waterproof performance.

Hereinafter, the present invention will be described in more detail by the following test examples. However, the following test examples are only for illustrating the present invention, and the scope of the present invention is not limited thereto.

Example 1 Preparation of Waterproofing Composition of the Present Invention

In accordance with the mixing ratio as shown in Table 2 below, the silicate-3 type cement-powder polymer-free gypsum-silica fume-reducing agent-CSA-powder antifoaming agent was sufficiently carried out at 20 rpm at a low speed of 20 rpm for 15 to 20 minutes to form a waterproofing material composition. Prepared.

1000kg / compound (kg) Class 3 Cement Water reducing agent Anhydrous gypsum Quartz sand Silica fume Powder Defoamer CSA Powder Polymer 350 20 22 480 21 22 25 60

Comparative Example 1

Conventional liquid waterproofing material compositions were used.

Test Example 1

After mixing 22 parts by weight of water with 100 parts by weight of the waterproofing composition of the present invention of Example 1 and mixing in a mortar mixer, the coating was applied so that the coating thickness is 2 mm to evaluate the physical properties according to the following measurement method In addition, the physical properties of the composition prepared in Comparative Example 1 were evaluated in the same manner. The test results are shown in Table 3.

[Water absorption amount measurement]

The composition of Example 1 of the present invention and Comparative Example 1 were applied to the upper end of the specimen (28 days curing) for measuring the concrete compressive strength of 10 cm in diameter.

Waterproofing mortar slurry prepared by mixing 22 parts by weight of water with the compositions of Example 1 and Comparative Example 1 of the present invention was applied to the upper end of the concrete specimen to a thickness of 2mm. Each specimen was cured in a laboratory atmosphere (temperature: 20-22 ° C.) for 27 days after application, and then dried for 24 hours in a dryer having a temperature of 80 ° C. The dried test piece was immersed in a water bath so as to immerse a depth of 5 cm with the waterproof layer as the bottom. The water absorption after immersion 1 and 24 hours was measured.

The surface was coated with epoxy to have a height of 8 to 10 cm so that water could contact only the waterproof layer of the bottom surface before the immersion, and the thickness of the dried specimen was measured before immersion.

[Water Permeation Measurement]

After fabricating and curing Example 1 and Comparative Example 1 in the same manner as the water absorption test specimen in a concrete disc (concrete specimen conditions are the same) to 15 cm in diameter and 5 cm in height, the water pressure 0.1kg / ㎠, mortar permeability for 1 hour Test in the tester. The mortar's permeability was evaluated by measuring the mortar weight before and after the permeation test after 1 hour.

[Adhesive strength measurement]

After the concrete plate was made to have a width of 30 cm and a height of 50 cm (concrete specimen conditions were the same), Example 1 and Comparative Example 1 of the present invention were formulated in the same manner as the water absorption test specimen and applied to the concrete surface. After 28 days of curing, the bond strength between the waterproof layer and the concrete was measured using a dry tensile strength tester.

[Measurement of Dry Crack Resistance at Early Age]

After the concrete plate was made to have a width of 30 cm and a height of 50 cm (concrete specimen conditions were the same), Example 1 and Comparative Example 1 of the present invention were formulated in the same manner as the water absorption test specimen and applied to the concrete surface. The coated specimen is immediately placed in a wind tunnel tester so that a wind of 3 m / sec is continuously blown for 48 hours, and then the surface state of the cured specimen is observed after 48 hours. At this time, the application area of each specimen was 20 cm wide and 40 cm long.

Evaluation of the surface condition of the cured waterproofing layer is as follows.

◎: Good without crack

○: less than 2 hair cracks within 5mm in length

△: less than 10 hair cracks within 5mm in length

▲: 10 to 20 hair cracks with a length of 5 mm or more

X: 20 or more hair cracks 5 mm or more in length generate | occur | produce

[Mortal compressive strength measurement]

Example 1 and Comparative Example 1 of the present invention were tested according to the test method of KS L 5105.

The results are shown in Table 3 below.

Water absorption (g) Permeability
(g) Adhesion strength
(kg / ㎠) Early age building
Crack resistance 28 days compressive strength
(kg / ㎠) 1 hours 24 hours Example 1 1.8 6.1 6.1 18.9 ◎ 299 Comparative Example 1 28.9 54.1 36.0 8.1 △ 212
From the results of Table 3, the waterproofing material composition of the present invention was superior to the conventional liquid waterproofing agent, and was found to have excellent adhesion strength and crack resistance.

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The waterproofing composition according to the present invention has excellent adhesiveness and durability compared to the existing waterproof mortar, and can be applied by a brush, a plastering knife, or a spray, and thus can be easily constructed by the general public. It is expected to be very useful in the art by reducing the labor cost and air due to excellent waterproof performance.

Claims (5)

delete delete Three kinds of cement 33-37% by weight, water-reducing agent, characterized in that 15 to 20 minutes of mixing by mixing in the mixing order of silica sand-cement-powder polymer-anhydrous gypsum-silica fume-sensitizer-CSA-powder defoamer To 3% by weight, anhydrous gypsum 1.5 to 3% by weight, silica sand 45 to 50% by weight, silica fume 1.5 to 3% by weight, powder defoamer 1.5 to 3% by weight, CSA (Calcium Sulfur Aluminate) cement 1.5 to 3.5% by weight and powder polymer Method for producing a waterproof material composition, characterized in that consisting of 3 to 9% by weight.
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