KR101122038B1 - Ultra light aerated concrete composition and method of wall using the same - Google Patents

Abstract

PURPOSE: An ultra-light aerated concrete composition and a manufacturing method of the ultra-light aerated concrete wall using thereof are provided to remarkably improve a subsidecibility, thereby increasing manufacturing efficiency. CONSTITUTION: An ultra-light aerated concrete composition comprises 60-90 weight% of cement and 10-40 weight% of mixed cement. The mixed cement comprises 0.05-0.2weight% of water reducing agent out of 100.0weight% of the mixed cement, 90-99weight% steel-type mixed cement slurry and 1-10weight% of a foaming agent. The steel-type mixed cement slurry is manufactured by agitating 50-80 weight% of the steel-type mixed cement which has been pulverized to powder with fineness of 4000-5000cm/g and 20-50 weight% of water. The water reducing agent is a mixture of one or more than one type selected from compounds including a lignin sulfonate compound, a polymelamine sulfonate compound, a polynaphthalene sulfonate compound, and a polycarboxylic acid compound. The foaming agent includes an animal nature foaming agent and a vegetable foaming agent.

Description

Ultra-light foamed concrete composition and method for producing ultra-light foamed concrete wall using the same {Ultra light aerated concrete composition and method of wall using the same}

The present invention relates to an ultralight foamed concrete composition composed of cement, slag, and water sensitizer using a binder of foamed concrete made mainly of a foaming agent mainly containing animal proteins, and a method for producing ultra-light foamed concrete walls using the same.

Most buildings, such as multi-family houses, officetels or commercial buildings, are divided into sections as needed and are commonly referred to as walls. The type of wall is a wet wall that is supplied from a manufacturer with concrete, and is constructed on a mold. On the contrary, the wall is already assembled at the factory and assembled at the site due to air shortening, construction cost reduction, and environmental resource protection. Construct.

These walls are hollow products in the extruded panels, products using lightweight mortar or lightweight concrete using lightweight aggregates, most of which is limited in the range of 1300 to 2000kg / m ³ . In this case, the inefficiency of the transport occurs due to the excessive weight of the drywall itself, and the installation accuracy is low, and the danger of falling is always present in the situation where the construction of the construction site has to rely on manual work due to the limited space in the construction site. It is fraught with problems and causes excessive load of high-rise buildings.

In order to improve the above problems, Korean Patent Publication No. 10-0874945 discloses a light insulation mortar and a construction method using the same. Lightweight insulation mortar composition and water comprising 30 to 60 parts by weight of extruded foamed styrofoam and 135 to 600 parts by weight of cement, 135 to 300 parts by weight of ceramic, 400 to 500 parts by weight of ocher, and 400 to 500 parts by weight of zeolite 270 to 390 parts by weight, including a curing composition comprising any one or more of the sealant-based silicate 2.5 to 3.5 parts by weight, 2.5 to 3.5 parts by weight of the flexible acrylic monomer, 2.5 to 3.5 parts by weight of natural latex, and lightweight thermal insulation mortar A lightweight insulating mortar having a composition and a cured composition in a weight ratio of 3.9: 1 to 4.9: 1 is proposed and a construction method using the same. However, it is disclosed a method that mixed with cement mortar using extruded foamed styrofoam, zeolite, etc. foamed in the form of sand grains as a lightweight aggregate,

Korean Patent Publication No. 10-1020653 discloses a method for producing an inorganic cement-based lightweight panel. The compound number is 40 per 100 parts by weight of dry mortar comprising 25 to 45% by weight of Portland cement and 55 to 75% by weight of ferrite. To 50 parts by weight, 0.05 to 0.2 parts by weight of animal foaming agent for forming a waste hole, 0.1 to 2 parts by weight of a naphthalene-based fluidizing agent, 0.01 to 0.1 parts by weight of a polysaccharide thickener, and a step of forming the mixture into a mold. It is included. It describes the technology for manufacturing panels using perlite as a lightweight aggregate,

In Korean Patent Publication No. 10-0545158, a foaming agent composition for foam concrete is provided, and the foaming agent composition for a conventional lightweight foam concrete composed of aluminum sulfate, polyvinyl alcohol, vegetable oil, formaldehyde and fatty alcohol, The foaming agent composition is further mixed with a glycol component as a dihydric alcohol and aluminum hydroxide, the mixture is 18 to 24% by weight of the aluminum sulfate, 2 to 6% by weight of the polyvinyl alcohol, the vegetable oil 10 to 20% by weight, the formaldehyde is 0.5 to 5% by weight, 0.5 to 5% by weight of the glycol component as the dihydric alcohol, the aluminum hydroxide is characterized in that 2 to 10% by weight and the remainder is fatty alcohol. This discloses a technique relating to the composition of the vegetable foaming agent of aerated concrete used for the ondol floor,

Korean Patent Publication No. 10-0290502 discloses light foamed concrete using feldspar and its manufacturing method, including about 50 to 90 parts by weight of cement and about 10 to 50 parts by weight of feldspar of about 60 to 120 , Lightweight foam concrete is about 50 to 90 parts by weight of cement, and about 10 to 50 parts by weight of feldspar to add a raw material of about 40 to 60 parts by weight of water based on cement to make a slurry, the slurry is produced by a foaming agent By adding a predetermined amount of bubble groups and kneading for a predetermined time, a manufacturing technique has been proposed. This discloses a technique for manufacturing a lightweight foam concrete using feldspar as a lightweight aggregate.

Korean Patent Publication No. 10-0120101 discloses a method for manufacturing lightweight foamed concrete, and relates to a method for manufacturing lightweight foamed concrete using waste aggregates and waste papers as light aggregates. A method of manufacturing lightweight foam concrete by mixing a ceiling material, a waste paper slurry pulverized with water, and a waste paper slurry calcined in a powder state with water and cement, and injecting and mixing a foamed animal protein foaming agent diluted thereto. Is presented. It discloses a method for manufacturing lightweight foam concrete using waste paper and waste building materials as lightweight aggregates,

Publication No. 10-5067729 discloses 16 kg of lightweight aggregate polyshell, which is composed of crushed and processed EVA (Ethyrene Vinyl Acetate) synthetic resin into 5mm particles, and then added fiber to the cement slurry mixed with air bubbles. Finally, a method of manufacturing high-insulation foam concrete, which is characterized in that the manufacturing of lightweight foam concrete through the step of mixing (Mixing) is presented, which is a lightweight foam concrete with a light aggregate of poly shell, bond pole, etc. Manufacturing method is described,

The publication No. 10-0550827 discloses a well-being panel using foamed concrete, but 30 to 60 parts by weight of lime material, 20 to 50 parts by weight of siliceous material, 5 to 8 parts by weight of vegetable fiber, metakaolin 5 On both sides of the foamed concrete panel composed of ˜20 parts by weight, 5-10 parts by weight of foamed vermiculite, 1-5 parts by weight of foaming agent and 30-100 parts by weight of water, 100 parts by weight of germanium powder, 20-40 parts by weight of earth hardener and water 40 It consists of a plurality of functional gravel added to ~ 60 parts by weight in one piece, the functional gravel has a ball shape having an empty space therein, the soil hardening agent alone or talc, bentonite, silica sand, calcium carbonate, zeolite Absorbent resin consisting of inorganic powder mixed with two or more kinds, crosslinked product of polyacrylate, polyacrylamide, polyethylene oxide, hydroxyethyl cellulose (hydro A well-being panel using foamed concrete, characterized by consisting of water-soluble polymers selected solely or mixed with two or more kinds of xy ethyl cellulose), has been proposed, which integrates functional gravel containing ion-emitting materials on both sides of foamed concrete. Is public,

Patent Publication No. 10-0292037 discloses a composition for light-insulating foamed concrete, but the technique is disclosed, characterized in that 0.1 to 0.2% by weight of vegetable foaming agent, 62 to 65% by weight of cement, the remaining water composition. It can be seen that the technology regarding the optimum composition by using the vegetable foaming agent is disclosed.

However, the prior art as described above uses a method of adding a lightweight aggregate, such as foamed styrofoam ball or perlite foamed to the cement mortar in order to reduce the weight, but as the addition amount increases due to a sharp drop in strength and increase in the setting time Although it shows a limitation that it is less than the weight reduction, another conventional technique is to increase the stability of the foaming agent used for foam concrete to induce weight reduction, but when using one type of Portland cement, foam concrete that must be formulated in a high unit quantity Due to the increase in the setting time, the foam group mixed with the pre-foaming, the vesicle phenomenon is large during the curing process, showing the problem of sedimentation and density separation according to the upper and lower positions.

In order to solve this problem, the development of ultra-light drywall composition is required.

Therefore, compared to the conventional drywall composition, by manufacturing the ultra-lightweight drywall having a density of 700kg / m ³ or less by using a mixed cement of foamed concrete as a binder of foam concrete, transporting by self weight, on-site assembly process with increased production efficiency There is a need for the development of ultra-light drywall to solve the problem.

If only one type of Portland cement is used as the foam concrete binder, cement condensation is delayed due to excessive water cement ratio (usually 70 to 80% by weight of cement), which causes the mixed foam group to become largely defoamed. This is called subsidence caused by parcels. If the settlement is not improved, weight reduction becomes difficult. Therefore, in the present invention, the cement paste is structural matrix is formed before the bubble group mixed by using the coarse rigid cement to form the settlement phenomenon to eliminate the phenomenon.

It is an object of the present invention to manufacture ultra-light drywall using crude mixed cement as a binder of aerated concrete, and to provide a composition of a factory-produced drywall product for improving production efficiency and early shipment.

In addition, another object of the present invention is to provide a method for producing an ultra-light drywall using a crude mixed cement as a binder of the foam concrete.

In order to achieve the above object, the present invention comprises a cement mixture composed of 60 to 90% by weight of cement, 10 to 40% by weight of slag, and 0.05 to 0.2 parts by weight of a water reducing agent based on 100 parts by weight of the mixed cement. becomes, fineness 4000 ~ 5000cm ² / g pulverized to, and the the mixture was stirred for 20 pulverized joganghyeong cement 50-80% by weight of water to 50% by weight prepared joganghyeong cement slurry and said joganghyeong cement slurry from the grinding mill It comprises an ultra-light foamed concrete wall composition, characterized in that the foamed concrete prepared by mixing and stirring 90 to 99% by weight, and foaming agent 1 to 10% by weight into a mold for curing.

In another aspect, the present invention is a method for producing the ultra-light dry wall, 50 to 80% by weight, the mixed water is 20 to 50% by weight of the crude steel mixed cement composition and the manufacturing method prepared by the manufacturing method in the volume of 1M ³ In the first step of preparing a cement slurry by mixing and stirring, the animal foaming agent containing a polypeptide compound as a main component or the vegetable foaming agent containing a polyacrylate compound as a main component is diluted with water at a ratio of 1: 25 to 50% by weight. Thereafter, the second step prepared by foaming by compressed air, the third step of mixing and stirring 90 to 99% by weight of the cement slurry prepared in the first step and the bubble group prepared in the second step at a ratio of 1 to 10% by weight Step, to provide a method for producing an ultra-light dry wall, characterized in that it comprises a fourth step of curing by injecting the foamed concrete prepared in the third step into a molding die To the problem solution means another object of the present invention.

According to the present invention, when one type of Portland cement is used as the foam concrete binder, cement condensation is delayed due to excessive water cement ratio (typically, 70 to 80% by weight of the cement), and thus, the mixed air bubbles are depleted. This phenomenon is large, and this is called settling caused by the vesicles.

As a result, roughness of about 20% is improved compared to the conventional foam concrete composition, thereby reducing the defoaming phenomenon and significantly increasing the settling rate, thereby making it possible to manufacture an ultra-lightweight drywall. Can greatly improve the problems of transportation, on-site assembly process.

In order to achieve the above object, the present invention is a mixed cement composed of 60 to 90% by weight of cement, 10 to 40% by weight of slag,

100 parts by weight of the mixed cement, including a reducing agent 0.05 to 0.2 parts by weight, pulverized in the grinding mill to 4000 ~ 5000cm ² / g, 50 ~ 80% by weight of the mixed crude steel cement and water 20 ~ 50 It is prepared by injecting a hard concrete mixed cement slurry prepared by stirring by weight percent, foamed concrete prepared by mixing and stirring 90-99 wt% of the crude steel mixed cement slurry and 1-10 wt% of the foaming agent into a molding mold to cure it. The present invention relates to an ultralight foamed concrete composition and a method for producing an ultralight foamed concrete wall using the same.

The present invention is to manufacture the ultra-lightweight wall using a mixed steel cement as a binder of aerated concrete, the composition of the factory-produced drywall product for improving production efficiency and early shipment, and the ultra-light foamed concrete composition to manufacture the same and the ultra-light foamed concrete using the same It is related with the manufacturing method of a wall.

Hereinafter, terms used in the present invention will be defined as follows.

1) Cement: Cement is usually manufactured by the process of calcining and grinding raw materials such as clay, iron ore, limestone, and silica at a temperature of 1200 ~ 1400 ℃.

Types are usually portland cement, crude steel portland cement, crude steel portland cement, medium heat portland cement, sulfate resistant portland cement, white portland cement.

Cement used in the present invention can be used a variety of mixed cements, such as one kind of portland cement, slag cement, crude steel cement, can be selected in consideration of economical efficiency. The cement may be included in the cement composition of 60 to 90% by weight of the cement composition containing slag.

2) Mixed cement: 10: 40% by weight of reactive pozzolanic materials such as blast furnace slag, high activity volcanic ash or acid clay, and fly ash generated from boiler combustion of thermal power plant. It refers to cement manufactured by mixing with Portland cement in proportion. The type includes blast furnace cement, silica cement, and fly ash cement. The difference from portland cement includes hardening mechanism by pozzolanic reaction, so the heat of hydration generated during hardening is low, condensation is slow and initial strength is low, but long-term age is similar to portland cement.

Mixed cement of the present invention is composed of 60 to 90% by weight of cement, 10 to 40% by weight of slag.

3) Crude steel mixed cement: Crude steel portland cement or crude steel portland cement are suitable for the manufacture of products for early strength, but it is difficult to manufacture economically secured walls due to the high unit cost.

Therefore, in the present invention, to produce a crude steel-type mixed cement which can represent economical manufacturing cost while showing the roughness to compensate for the phenomenon that the initial curing is delayed due to the slow hydration reaction that is a disadvantage of the mixed cement.

Usually 60 to 90% by weight of the Portland cement and 10 to 40% by weight of the slag powder of 3500 to 4000cm ² / g raw materials, the admixture is a lignin sulfonate compound, polymelamine sulfonate compound, polynaphthalansulfonate compound, It refers to a powder produced at 4000 to 5000 cm ² / g by pulverizing after mixing 0.05 to 0.2% by weight of a polycarboxylic acid-based compound alone or two or more mixed.

In the crude steel mixed cement of the present invention, a mixed cement is prepared from 60 to 90% by weight of cement and 10 to 40% by weight of slag, and 0.05 to 0.2 parts by weight of a water reducing agent is added to 100 parts by weight of the mixed cement to prepare a crude mixed cement. .

4) Crude mixed cement effect: If the slag mixture is more than the range of the present invention, the roughness does not appear even if the powder degree is increased, if less than the range, the economic effect is weak.

In general, when only the Portland cement and the slag is mixed to produce a powder of 4000-5000 cm ² / g, the specific surface area becomes high, and a lot of kneaded water is required to secure workability. Accordingly, the roughness is halved, and the admixture is used to reduce the increase of the kneading water. When the use of the admixture is more than the scope of the invention, the water and the mixed cement particles are separated by excessive fluidity, and when less than the scope of the invention, the effect of reducing the kneaded water is weak.

Therefore, crude steel composite cement was manufactured which is more economical than crude steel portland cement while supplementing the disadvantages of mixed cement.

The ultralight wall composition of the present invention is characterized in that it comprises a rough mixed cement, water, foaming agent.

Slag is a by-product produced during the steelmaking and steelmaking process, and the shape thereof includes lumps, pulverized fine powder, powder slag mixed with pulverized fine powder and gypsum, and may include 10 to 60% by weight of the mixed cement.

The sensitizer can be used singly or in combination of two or more kinds of lignin sulfonate compound, polymelamine sulfonate compound, polynaphthalansulfonate compound, pullicarboxylic acid compound, etc. It is more preferable if it is mixed.

The prepared crude mixed cement is pulverized into a powder of 4000 ~ 5000cm ² / g using a grinding mill.

If the cement and slag are pulverized first and then mixed, if manufactured with the same powder, the roughing performance is less effective than that after pulverization after mixing. This is because uniform mixing is difficult and the granulation rate of the particles is not continuous and the filling rate is low.

The foaming agent used in the present invention is any foaming agent selected from animal and vegetable foaming agents as follows.

1) Animal foaming agent is composed of polypeptide compound, and it refers to a natural high molecular substance that degrades keratin of animal. Good foam stability makes it suitable for construction on tall or thick structures. The use of animal foaming agents is preferred for lightweight walls.

2) Vegetable foaming agent refers to a foaming agent prepared by adding a bubble stabilizer, a viscous agent, etc. to a surfactant as a polyacrylate compound. Foam is weak compared to animal foam, but has excellent fluidity and is suitable for construction of a thin and wide area.

division Animal foaming agent Vegetable foaming agent chief ingredient Animal blood, casein and gelatin Polyacrylate System Physical properties pH7, specific gravity 1.2, pale yellow pH7, Specific Gravity1.12, White Bubble type Independent bubble Bubble Advantages Good elasticity
Good stability Have a big gun
Excellent workability Disadvantages stink
Causes of corrosion
Long term preservation difficulty Weaker than animal

In addition, the present invention is the first step to prepare a crude steel mixed cement slurry by mixing and stirring 50 to 80% by weight of crude steel mixed cement, 20 to 50% by weight water based on the production of 1M ³ , the foaming agent and water 1 : Dilution of 25 to 50% by weight, followed by foaming by compressed air in a second step, 90 to 99% by weight of the crude steel mixed cement slurry prepared in the first step and the bubble group prepared in the second step The third step of mixing and stirring at a ratio of 1 to 10% by weight, and the fourth step of curing by injecting the foamed concrete prepared by the third step into a molding die.

When manufacturing the crude mixed cement slurry, the crude mixed cement prepared by the method of manufacturing the crude mixed cement composition can be selected in the range of 50 to 80% by weight, and when less than this range is used, the effect of early strength is low and the compressive strength is low. If it loses the function of the wall, and higher than the range, it is difficult to secure the filling time of the mold. Water may be used that does not affect the cement hardening, and in order to ensure the target roughness and filling properties in the mold, it is preferable to add 20 to 50% and stir with a dedicated mixer.

The animal foam used in the foam production of the foaming agent of the present invention has a polypeptide protein structure, as shown in the structural formula, wherein R refers to an lipophilic molecule which is insoluble in water and is familiar with oil components, and an anionic interface among COO ^- carboxyl groups. As an active agent, it has excellent foaming ability, NH is an amine and improves the stability of bubbles after mixing with cement, it is also characterized by liquid animal foaming agent with neutral pH of pH7 and pale yellow with specific gravity 1.2.

The vegetable foaming agent has a polyacrylate-like structure as in the formula, wherein R is a lipophilic molecule which is insoluble in water and is intimate with oil components. The ethylene oxide of (CH ₂ CH ₂ O) ₃ is 2 mol and 5 The mole is included in the range. SO ₃ ^- Na ⁺ in the structure exhibits the properties of an anionic surfactant which dissolves in water and increases the bubble generating ability. In addition, a liquid vegetable foaming agent having a neutral pH of pH 7 and a specific gravity of 1.12 is diluted with water at a ratio of 1: 25 to 50% by weight, and then passed through a foam tube with 3.5 to 4.5 kg / cm 2 of compressed air. If the dilution ratio of water and foaming agent is low, the foamed foam cell is enlarged, foaming strength is bad, and foaming becomes easy. If the dilution ratio of foaming agent is high, foaming cell is small, foaming strength is high and the cohesion of foam group is increased. This makes it difficult to stir with the cement slurry.

The crude steel mixed cement slurry prepared in the first step is mixed with 90 to 99% by weight and the bubble group prepared in the second step in a ratio of 1 to 10% by weight. The mixing ratio of the bubble group is a factor directly affecting the weight reduction, and it is an important technique for the weight reduction that it does not settle even when mixing a large amount of bubble groups. Stirring is preferably in the range of 100 to 1000 RPM per minute, the stirring blade is efficient in the twin shaft system. If the stirring speed is too fast, defoaming may occur when stirring.

It is preferable to use a hydraulic or fluid rotor type pump to transfer the bubble slurry manufactured by the third step manufacturing process to the molding die, and to fill the injection hose down to the bottom of the molding die. Material separation can be prevented. The bubble slurry produced according to the present invention ensures sufficient filling properties, and thus it is possible to economically manufacture the vibrating table or the vibrating mechanism such as the rod vibrator without using separately.

It should be possible to move to the curing room within 20 minutes after filling the mold, and since vibration and movement may cause settlement, care should be taken. Initialization starts from 3 to 8 hours after stirring and termination is completed within 5 to 10 hours. The initial and final time can be adjusted in range depending on the amount of crude mixed cement used and should be adjusted according to the production process.

Separation in the mold is possible if the compressive strength of 2kg / ㎠ or more, which can be adjusted within 7 to 15 hours after the mold filling. This should also be optimized for the production process.

Hereinafter, preferred examples are provided to aid the understanding of the present invention, but the following examples are merely for exemplifying the present invention, and various changes and modifications within the scope and spirit of the present invention are apparent to those skilled in the art. It is natural that such variations and modifications fall within the scope of the appended claims.

Examples 1-4

Based on the production of the volume of 1M ³ , to prepare a crude steel mixed cement slurry by mixing and stirring the crude steel mixed cement 300 ~ 500kg, water 150 ~ 250kg (step 1)

After diluting by adding 0.51 ~ 0.75kg of foaming agent and 25 ~ 37kg of water, it is prepared by foaming with compressed air of 3.5 to 4.5kg / ㎠ (second step)

Ultra-light bubbles by mixing and stirring (the third step) the bubble group prepared by mixing the foamed mixed slurry of 450 ~ 900kg and the foaming agent and water prepared in the above and foamed with 25.5 ~ 37.7kg in a stirrer of 100 to 1000 RPM revolutions per minute After the concrete composition 1M ³ is prepared, the ultra-light foamed concrete composition prepared in the third step is injected into the mold by a hydraulic pump or a fluid rotor type pump and cured (fourth step).

After filling the mold, the mold was cured for 7 to 15 hours, and when the compressive strength of 2kg / cm 2 or more was expressed, the mold was separated to prepare an ultralight foam concrete wall.

Experimental Example

1) Comparative example of cement and mixed cement

Comparison of setting time according to cement and mixed cement ratio division One kind of normal
Portland cement Slag High Performance Supervisor system Comparative example 100% -

B × 0.1%

100.0 Example 1 80 20% 100.0 Example 2 60 40% 100.0 Example 3 20 80% 100.0 4 - 100% 100.0

Comparison results of setting time according to cement and mixed cement ratio Item

Powder
(Cm 2 / g)
Setting time
First closing Comparative Example 1 One kind of normal
Portland cement 3200 3:50 6:15 Example 1 Mixed cement 4500 3:00 5:20 Example 2 Mixed cement 4500 4:40 8:00 Example 3 Mixed cement 4500 7:00 18:25 4 Mixed cement 4500 Not measurable Not measurable

Comparison of Condensation and Physical Properties According to Powder Level division One kind of normal
Portland cement Slag High Performance Supervisor system Comparative Example 1

80%


20%


B × 0.1%
100.0 Example 1 100.0 Example 2 100.0 Example 3 100.0 Example 4 100.0

Comparison of Condensation and Physical Properties According to Powder Level Item Powder
(Cm 2 / g)
Setting time Compressive strength
importance First closing 1 day 3 days
7 days
28 days Comparative example
One Class 1 Ordinary
Portland cement 3200 3:50 6:15 98 223 275 345 3.15
Example 1 Mixed cement
3200 3:45 6:20 85 210 277 355 3.14
Example 2 Mixed cement
4000 3:20 5:45 102 221 283 362 3.14
Example 3 Mixed cement
4500 3:00 5:20 108 232 286 365 3.14
Example 4 Mixed cement
5000 2:45 5:00 115 245 307 373 3.14

2) Experimental example of aerated concrete

Comparison of Bubble Concrete Mixing Ratio and Characteristics According to Mixed Cement Usage division
Mixed cement Mixed water W / B Bubble gun Sum bubble
Slurry density bubble
Dry density
(kg) (L) (kg) (%) (L) (L) (ton / m3) Comparative Example 1 300 95.5 150 50 754.5 1000 0.49 0.37 Example 1 350 111.5 175 50 713.5 1000 0.56 0.42 Example 2 400 127.4 200 50 672.6 1000 0.63 0.47 Example 3 450 143.3 275 50 581.7 1000 0.74 0.52 Example 4 500 159.2 250 50 590.8 1000 0.78 0.58

High performance powder mixing cement and mixed material performance comparison experiment division W / C
(%) 24H compressive strength
(kgf / cm2) 24H adhesive strength
(kgf / cm2) Remarks OPC 55 2.6 1.2 2 interface drop, 1 mother attachment OPC + Supervisor 45 6.7 1.7 All three attachment High Powder Coating Cement 55 9.1 1.8 All three attachment OPC + NaCl 1% 55 4.8 1.3 All three attachment OPC + K2SO4 1% 55 3.4 1.1 Both are interfacial

Test result of finish board adhesion strength according to curing time division Compressive strength
(kgf / cm2) Adhesion strength
(kgf / cm2) Moisture content
(%) Dry density
(g / cm3) Example 1 1 hours 5.2 2.4 15 0.63 Example 2 2 hours 6.7 2.3 15 0.63 Example 3 3 hours 7.5 2.5 14 0.62 Example 4 6 hours 8.4 2.8 14 0.62

Comparison of the Invention and the Prior Art division Prior art Example 1 Flow (mm) Not measurable 200 Bubble Slurry Density (g / cm 3) 700 800
Compressive strength (kgf / ㎠) 24H 5.7 8.3 5 days 18 23 Steam Curing 22 28 Adhesion Strength (kgf / ㎠) 24H 1.3 2.1 Moisture content (%) 13 20 Dry density (g / cm3) 0.72 0.56

Claims (7)

In the ultra-light foam concrete composition,
Mixed cement composed of 60 to 90% by weight of cement and 10 to 40% by weight of slag,
To 100 parts by weight of the mixed cement, including a reducing agent 0.05 to 0.2 parts by weight, and pulverized in the grinding mill to a powder of 4000 ~ 5000 cm 2 / g, 50 to 80% by weight of the ground crude mixed cement and water 20 to 50 It is composed of a crude steel mixed cement slurry prepared by stirring the wt%, 90 to 99% by weight of the crude steel mixed cement slurry, and 1 to 10% by weight of the foaming agent,
The water reducing agent is any one compound selected from lignin sulfonate-based compound, polymelamine sulfonate-based compound, polynaphthalansulfonate-based compound, pulleycarboxylic acid-based compound or two or more kinds thereof,
The foaming agent includes an animal foaming agent and a vegetable foaming agent, and the animal foaming agent is a liquid protein foaming agent having a polypeptide protein structure, neutral pH 7, and pale yellow with a specific gravity of 1.2, as shown in the following structural formula.

R is a lipophilic molecule which is insoluble in water and is familiar with oil components;
COO ^- is an anionic surfactant in the carboxyl group;
NH is an amine;
The vegetable foaming agent is a liquid vegetable foaming agent having a polyacrylate-based compound as a main component and having a neutral pH7 and a white specific gravity of 1.12 as shown in the following structural formula.

R is a lipophilic molecule which is insoluble in water and is familiar with oil components;
Ethylene oxide of (CH ₂ CH ₂ O) ₃ is included in the range of 2 moles and 5 moles;
SO ₃ ^- Na ⁺ is an anionic surfactant;
Ultra-light foamed concrete composition, characterized in that the composition of any one selected from 1: 1: 25 to 50 by weight with respect to water. delete delete In the manufacturing method of the ultra-light foam concrete wall using the ultra-light foam concrete composition,
A first step of preparing a cement slurry by mixing and stirring 50 to 80 wt% of the crude steel mixed cement and 20 to 50% of the mixed cement by weight based on the volume of 1M ³ ;
A second step of diluting the foaming agent with water at a ratio of 1: 25-50% by weight, followed by foaming with compressed air of 3.5 to 4.5 kg / cm 2;
When the cement slurry prepared in the first step and the bubble group prepared in the second step are mixed and stirred at a ratio of 90 to 99% by weight of the cement slurry and 1 to 10% by weight of the bubble group, based on the production of 1M ³ . The third step;
A method of manufacturing an ultra-light foamed concrete wall using the ultra-light foamed concrete composition, characterized in that the manufacturing method comprises the fourth step of curing by injecting the foamed concrete prepared by the third step into a molding die. The method according to claim 4, wherein the third step of mixing and stirring the cement slurry prepared in the first step and the bubble group prepared in the second step is 1 to 10 of the bubble group prepared in step 2 based on the volume of 1M ³ A method of producing ultra-light foam concrete walls using an ultra-light foam concrete composition, characterized in that the mixing in a weight percent ratio, the stirring is mixed in a dedicated mixer of 100 to 1000 RPM per minute.  The method according to claim 4, wherein the fourth step of filling the foaming die foamed slurry produced by the third stage manufacturing process using a hydraulic or fluid rotor pump, the transfer hose is lowered to the bottom of the molding die The manufacturing method of the ultra-light foam concrete wall using the ultra-light foam concrete composition characterized by the above-mentioned. The ultra-light foam of claim 4, wherein the separation in the mold of the fourth step comprises compressive strength of 2 kg / cm ² or more, or ultra-light foam concrete composition characterized in that the mold is separated within 7 to 15 hours after the mold is filled. Method of manufacturing concrete walls.