KR101550352B1 - Admixtures composition for concrete utilizing sintered dust - Google Patents
Admixtures composition for concrete utilizing sintered dust Download PDFInfo
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- KR101550352B1 KR101550352B1 KR1020140051167A KR20140051167A KR101550352B1 KR 101550352 B1 KR101550352 B1 KR 101550352B1 KR 1020140051167 A KR1020140051167 A KR 1020140051167A KR 20140051167 A KR20140051167 A KR 20140051167A KR 101550352 B1 KR101550352 B1 KR 101550352B1
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/06—Combustion residues, e.g. purification products of smoke, fumes or exhaust gases
- C04B18/08—Flue dust, i.e. fly ash
- C04B18/084—Flue dust, i.e. fly ash obtained from mixtures of pulverised coal and additives, added to influence the composition of the resulting flue dust
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/02—Agglomerated materials, e.g. artificial aggregates
- C04B18/022—Agglomerated materials, e.g. artificial aggregates agglomerated by an organic binder
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/14—Waste materials; Refuse from metallurgical processes
- C04B18/141—Slags
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/14—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
- C04B28/16—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements containing anhydrite, e.g. Keene's cement
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Civil Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Combustion & Propulsion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
Description
본 발명은 소결더스트를 활용한 콘크리트용 혼화재 조성물에 관한 것으로, 더욱 상세하게는 포틀랜드 시멘트와 같은 시멘트 성분에 혼합되면 콘크리트의 압축강도를 향상시키며, 콘크리트의 초기반응속도가 향상되어 증기양생의 속도를 증가시키고, 분말도가 높기 때문에 콘크리트의 유동성을 증가시켜 성형틀에서 탈형이 잘 되도록 하며, 탈형 후에는 표면이 매끄러운 콘크리트를 제공한다.
The present invention relates to an admixture composition for concrete using sintered dust, and more particularly, to a concrete admixture composition which improves the compressive strength of concrete when mixed with a cement component such as Portland cement, And increase the fluidity of the concrete due to the high degree of the powder, so that the demoulding can be performed well in the forming mold, and the surface is smooth after the demoulding.
콘크리트는 시멘트 조성물과 물과의 반응으로 경화되어 생성되는 수경성 반응물로, 콘크리트는 사용되는 물의 양에 따라서 작업성에 차이가 날뿐만 아니라 경화 후의 압축 강도, 경화 시간, 내구성 등의 물리, 화학적 특성이 다르게 나타난다.Concrete is a hydraulic reaction product produced by curing by the reaction of cement composition with water. Concrete is not only different in workability depending on the amount of water used, but also has physical and chemical properties such as compressive strength, curing time and durability after curing appear.
일반적으로, 물의 사용량이 증가하면 콘크리트의 유동성이 증가하여 작업성이 향상되지만 압축 강도 등이 저하되어 균열이 발생하거나 내구성이 저하되는 문제점이 있다.Generally, when the amount of water used is increased, the flowability of concrete is increased to improve workability, but the compressive strength and the like are lowered to cause cracks or durability.
따라서, 콘크리트 제조 시에 물의 사용량은 가능한 적은 것이 바람직하지만, 작업성을 유지하기 위하여 일정한 범위 내에서 물의 사용은 피할 수가 없는데, 상기의 문제점을 해소하기 위해 콘크리트에는 시멘트, 물, 골재 이외에 혼화재(admixtures)가 추가적으로 사용되고 있는데, 혼화재는 콘크리트의 물리적 및 화학적 특성을 변화시키고 작업성을 유지 및 개선시키기 위하여 시멘트 조성물에 첨가되는 물질을 통칭한다.Therefore, it is desirable to minimize the amount of water used in the concrete production. However, in order to maintain the workability, it is inevitable to use water within a certain range. In order to solve the above problems, the admixtures ) Is additionally used. The admixture generally refers to a substance added to the cement composition in order to change the physical and chemical properties of the concrete and to maintain and improve the workability.
혼화재를 사용함으로써 콘크리트의 물리적 특성은 크게 변화, 개선될 수 있는데, 예를 들면 혼화재에 함유로 인해 콘크리트의 내구성은 물론 내후성 및 내화학성이 크게 향상되고 있으며, 동절기와 같은 저온 환경, 수중 등과 같은 극한 환경, 60층 이상의 초고층 빌딩의 건축 환경 등에서 콘크리트를 타설하기 위해서는 혼화재를 첨가한 개량령 콘트리의 사용이 필수적이라고 할 수 있다.The physical properties of the concrete can be greatly changed and improved by using the admixture. For example, due to the inclusion of the admixture, the durability of the concrete is greatly improved and the weatherability and chemical resistance are greatly improved. In the cold environment such as the winter season, In order to place concrete in the environment, the construction environment of skyscrapers over 60 stories, it is necessary to use the modified concret tree with the addition of mixed material.
종래에는 콘크리트의 수화열을 낮추고, 내화학성, 내열성 및 수밀성을 향상시키기 위해 슬래그분말이나 플라이 애시가 주로 사용되었는데, 상기의 성분이 함유된 콘크리트는 초기응결속도가 더디기 때문에 거푸집 존치기간이 길어져 제조공정의 효율성이 저하되는 문제점이 있었다.
Conventionally, slag powder or fly ash has been mainly used for lowering the hydration heat of concrete and improving chemical resistance, heat resistance and watertightness. Since the initial condensation speed of the concrete containing the above components is slow, There is a problem that the efficiency is lowered.
본 발명의 목적은 콘크리트의 압축강도를 향상시키며, 콘크리트의 초기반응속도를 향상시켜 증기양생의 속도를 증가시키는 소결더스트를 활용한 콘크리트용 혼화재 조성물을 제공하는 것이다.An object of the present invention is to provide a concrete admixture composition using sintered dust which improves the compressive strength of concrete and improves the initial reaction speed of concrete to increase the speed of steam curing.
본 발명의 다른 목적은 분말도가 높기 때문에 콘크리트의 유동성을 증가시켜 성형틀에서 탈형이 잘 되도록 하며, 탈형 후에는 표면이 매끄러운 콘크리트를 제공하는 소결더스트를 활용한 콘크리트용 혼화재 조성물을 제공하는 것이다.Another object of the present invention is to provide a concrete admixture composition using sintered dust, which has a high degree of powderiness to increase the fluidity of concrete to facilitate demoulding in a forming mold and provide smooth concrete after demoulding.
본 발명의 또 다른 목적은 천연무수석고의 사용량을 줄여 제조비용을 절감할 수 있는 소결더스트를 활용한 콘크리트용 혼화재 조성물을 제공하는 것이다.
Another object of the present invention is to provide an admixture composition for concrete using sintered dust which can reduce the use amount of natural anhydrite and reduce manufacturing cost.
본 발명의 목적은 슬래그 미분말, 플라이 애시, 소결더스트 및 천연무수석고로 이루어지는 것을 특징으로 하는 소결더스트를 활용한 콘크리트용 혼화재 조성물을 제공함에 의해 달성된다.The object of the present invention is achieved by providing an admixture composition for concrete utilizing sintered dust, which is characterized by comprising slag powder, fly ash, sintered dust and natural anhydrous gypsum.
본 발명에 바람직한 특징에 따르면, 상기 소결더스트를 활용한 콘크리트용 혼화재 조성물은 슬래그 미분말 50 내지 60 중량%, 플라이 애시 20 내지 30 중량%, 소결더스트 15 내지 20 중량% 및 천연무수석고 2 내지 4 중량%로 이루어지는 것으로 한다.According to a preferred aspect of the present invention, the admixture composition for concrete using the sintered dust includes 50 to 60 wt% of slag fine powder, 20 to 30 wt% of fly ash, 15 to 20 wt% of sintered dust, and 2 to 4 wt% of natural anhydrous gypsum %.
본 발명의 더 바람직한 특징에 따르면, 상기 소결더스트를 활용한 콘크리트용 혼화재 조성물은 슬래그 미분말 55 중량%, 플라이 애시 25 중량%, 소결더스트 17 중량% 및 천연무수석고 3 중량%로 이루어지는 것으로 한다.According to a further preferred feature of the present invention, the admixture composition for concrete utilizing the sintered dust is composed of 55% by weight of slag fine powder, 25% by weight of fly ash, 17% by weight of sintered dust and 3% by weight of natural anhydrous gypsum.
본 발명의 더욱 바람직한 특징에 따르면, 상기 슬래그 미분말은 에이징 처리된 제강 슬래그로 이루어지는 것으로 한다.According to a further preferred feature of the present invention, the slag fine powder is made of steelmaking slag subjected to aging treatment.
본 발명의 더욱 더 바람직한 특징에 따르면, 상기 슬래그 미분말은 이산화규소 35.16 중량%, 산화알루미늄 14.92 중량%, 산화철 0.4 중량%, 산화마그네슘 4.29 중량% 및 산화칼슘 42.86 중량%가 함유되는 것으로 한다.According to a still further preferred feature of the present invention, the slag fine powder contains 35.16% by weight of silicon dioxide, 14.92% by weight of aluminum oxide, 0.4% by weight of iron oxide, 4.29% by weight of magnesium oxide and 42.86% by weight of calcium oxide.
본 발명의 더욱 더 바람직한 특징에 따르면, 상기 플라이 애시는 이산화규소 56.27 중량%, 산화알루미늄 23.36 중량%, 산화철 7.28 중량%, 산화마그네슘 1.31 중량%, 산화칼슘 4.27 중량% 및 삼산화황 3.18 중량%가 함유되는 것으로 한다.According to a further preferred feature of the present invention, the fly ash contains 56.27% by weight of silicon dioxide, 23.36% by weight of aluminum oxide, 7.28% by weight of iron oxide, 1.31% by weight of magnesium oxide, 4.27% by weight of calcium oxide and 3.18% .
본 발명의 더욱 더 바람직한 특징에 따르면, 상기 소결더스트는 제철 소결 공정에서 발생하는 것으로, 분말도가 8000 내지 10000 cm2/g인 것으로 한다.According to an even more preferred feature of the present invention, the sintered dust is generated in a sintering process of iron and has a powdery figure of 8000 to 10000 cm 2 / g.
본 발명의 더욱 더 바람직한 특징에 따르면, 상기 소결더스트는 밀도가 2.8g/cm2인 것으로 한다.According to an even more preferred feature of the present invention, the sintered dust has a density of 2.8 g / cm < 2 >.
본 발명의 더욱 더 바람직한 특징에 따르면, 상기 소결더스트는 이산화규소 10.9 중량%, 산화알루미늄 5.73 중량%, 산화철 16.1 중량%, 산화마그네슘 3.09 중량%, 산화칼슘 41.2 중량% 및 삼산화황 2.05 중량%가 함유되는 것으로 한다.According to an even more preferred feature of the present invention, the sintered dust comprises 10.9% by weight of silicon dioxide, 5.73% by weight of aluminum oxide, 16.1% by weight of iron oxide, 3.09% by weight of magnesium oxide, 41.2% by weight of calcium oxide and 2.05% .
본 발명의 더욱 더 바람직한 특징에 따르면, 상기 천연무수석고는 이산화규소 1.15 중량%, 산화알루미늄 0.03 중량%, 산화철 0.04 중량%, 산화마그네슘 0.15 중량%, 산화칼슘 39.95 중량% 및 삼산화황 55 중량%가 함유되는 것으로 한다.
According to an even more preferred feature of the present invention, the natural anhydrous gypsum contains 1.15% by weight of silicon dioxide, 0.03% by weight of aluminum oxide, 0.04% by weight of iron oxide, 0.15% by weight of magnesium oxide, 39.95% by weight of calcium oxide and 55% .
본 발명에 따른 소결더스트를 활용한 콘크리트용 혼화재 조성물은 콘크리트의 압축강도를 향상시키며, 콘크리트의 초기반응속도를 향상시켜 증기양생의 속도를 증가시키는 탁월한 효과를 나타낸다.The admixture composition for concrete using the sintered dust according to the present invention has an excellent effect of increasing the compressive strength of the concrete and increasing the speed of the initial curing of the concrete to increase the speed of steam curing.
또한, 분말도가 높기 때문에 콘크리트의 유동성을 증가시켜 성형틀에서 탈형이 잘 되도록 하며, 탈형 후에는 표면이 매끄러운 콘크리트를 제공하는 탁월한 효과를 나타낸다.In addition, since the degree of powder is high, the fluidity of the concrete is increased, so that the demoulding can be performed well in the forming mold, and after the demoulding, the surface exhibits a smooth concrete.
또한, 천연무수석고의 사용량을 줄여 제조비용을 절감할 수 있는 탁월한 효과를 나타낸다.
In addition, it shows an excellent effect of reducing the production cost by reducing the amount of natural anhydrous gypsum used.
이하에는, 본 발명의 바람직한 실시예와 각 성분의 물성을 상세하게 설명하되, 이는 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자가 발명을 용이하게 실시할 수 있을 정도로 상세하게 설명하기 위한 것이지, 이로 인해 본 발명의 기술적인 사상 및 범주가 한정되는 것을 의미하지는 않는다.
Hereinafter, preferred embodiments of the present invention and physical properties of the respective components will be described in detail with reference to the accompanying drawings. However, the present invention is not limited thereto, And this does not mean that the technical idea and scope of the present invention are limited.
본 발명에 따른 소결더스트를 활용한 콘크리트용 혼화재 조성물은 슬래그 미분말, 플라이 애시, 소결더스트 및 천연무수석고로 이루어지며, 슬래그 미분말 50 내지 60 중량%, 플라이 애시 20 내지 30 중량%, 소결더스트 15 내지 20 중량% 및 천연무수석고 2 내지 4 중량%로 이루어지는 것이 바람직하다.The admixture composition for concrete using the sintered dust according to the present invention comprises 50 to 60% by weight of slag fine powder, 20 to 30% by weight of fly ash, 15 to 30% by weight of sintered dust, 20% by weight and 2 to 4% by weight of natural anhydrous gypsum.
또한, 슬래그 미분말 55 중량%, 플라이 애시 25 중량%, 소결더스트 17 중량% 및 천연무수석고 3 중량%로 이루어지는 것이 더욱 바람직하다.
It is more preferable that the slag powder is composed of 55% by weight of the slag fine powder, 25% by weight of the fly ash, 17% by weight of the sintered dust and 3% by weight of the natural anhydrous gypsum.
상기 슬래그 미분말은 50 내지 60 중량%가 함유되며, 에이징 처리된 제강 슬래그로 이루어지는데, 콘크리트의 수화열을 낮추고 내화학성, 내열성 및 수밀성을 향상시키는 역할을 하는데, 더욱 상세하게는 제철소의 철 제조 공정에서 발생하는 부산물로서 용융상태의 액상상태이며, 그 목적에 따라 냉각과정을 통해 고상화시킨 후 파쇄공정을 거쳐서 양산되는데, 이처럼 제강 슬래그가 파쇄되어 미분말인 상태를 슬래그 미분말이라 하며, 그 용도에 따라 분말도를 조절할 수 있게 된다.The slag fine powder is contained in an amount of 50 to 60% by weight and is composed of steel slag subjected to aging treatment. The steel slag serves to lower the hydration heat of concrete and to improve chemical resistance, heat resistance and watertightness. More specifically, As a by-product, a by-product is in a liquid state in a molten state, and is solidified through a cooling process and then mass-produced through a crushing process in accordance with its purpose. The slag is crushed to form a fine powder, It is possible to adjust the degree of the display.
그러나, 일반적인 슬래그 미분말은 타성분에 비해 산화칼슘 성분이 많이 함유되어 있으며, 이 성분 중 자유 산화칼슘은 물과 반응하여 수산화칼슘이 형성되며, 이러한 과정이 진행되면서 체적이 팽창하게 된다.However, general slag fine powders contain a large amount of calcium oxide component compared to other components, and among these components, free calcium oxide reacts with water to form calcium hydroxide, and as the process progresses, the volume expands.
따라서, 상기와 같은 특성을 갖는 슬래그 미분말을 건설재료로 활용하기 위해서는 전처리공정을 거치게 되는데, 가장 일반적인 처리방법은 에이징(aiging)공법으로 넓은 장소에 제강슬래그를 일정기간 방치하여 잠재 팽창성을 없앤 후 사용하게 된다. 따라서 본 발명에서도 상기와 같이 에이징 처리가 된 슬래그 미분말을 사용하는 것이 바람직하다.Therefore, in order to utilize the slag fine powder having the above-mentioned characteristics as a construction material, it is subjected to a pretreatment process. The most common treatment method is to leave the steel slag in a wide place for a certain period by aging method, . Therefore, in the present invention, it is preferable to use the slag fine powder subjected to the aging treatment as described above.
상기의 과정을 통해 제조되는 슬래그 미분말은 이산화규소 35.16 중량%, 산화알루미늄 14.92 중량%, 산화철 0.4 중량%, 산화마그네슘 4.29 중량% 및 산화칼슘 42.86 중량%가 함유되며, 상기 슬래그 미분말의 함량이 50 중량% 미만이면 상기의 효과가 미미하며, 상기 슬래그 미분말의 함량이 60 중량%를 초과하게 되면 본 발명에 따른 소결더스트를 활용한 콘크리트용 혼화재 조성물의 초기 응결속도가 저하된다.
The slag fine powder produced through the above process contains 35.16% by weight of silicon dioxide, 14.92% by weight of aluminum oxide, 0.4% by weight of iron oxide, 4.29% by weight of magnesium oxide and 42.86% by weight of calcium oxide, and the content of the slag fine powder is 50% %, The effect is insignificant. If the content of the slag fine powder exceeds 60% by weight, the initial setting speed of the admixture composition for concrete using the sintered dust according to the present invention is lowered.
상기 플라이 애시는 20 내지 30 중량%가 함유되며, 콘크리트의 수화열을 낮추고 내화학성, 내열성 및 수밀성을 향상시키는 역할을 하는데, 이산화규소 56.27 중량%, 산화알루미늄 23.36 중량%, 산화철 7.28 중량%, 산화마그네슘 1.31 중량%, 산화칼슘 4.27 중량% 및 삼산화황 3.18 중량%가 함유된다.The fly ash is contained in an amount of 20 to 30% by weight and lowers the hydration heat of concrete and improves chemical resistance, heat resistance and watertightness. It is composed of silicon dioxide 56.27% by weight, aluminum oxide 23.36% by weight, iron oxide 7.28% by weight, magnesium oxide 1.31% by weight, calcium oxide 4.27% by weight and sulfur trioxide 3.18% by weight.
상기 플라이 애시의 함량이 20 중량% 미만이면 상기의 효과가 미미하며, 상기 플라이 애시의 함량이 30 중량%를 초과하게 되면 본 발명에 따른 소결더스트를 활용한 콘크리트용 혼화재 조성물의 초기 응결속도가 저하된다.
If the content of the fly ash is less than 20% by weight, the effect is insignificant. When the content of the fly ash exceeds 30% by weight, the initial coagulation speed of the admixture composition for concrete using the sintered dust according to the present invention is lowered do.
상기 소결더스트는 15 내지 20 중량%가 함유되며, 제철 소결 공정에서 발생하는 것으로, 콘크리트의 초기 강도와 반응 속도를 향상시키는 역할을 한다.The sintered dust contains 15 to 20% by weight and is generated in the iron-making sintering process and serves to improve the initial strength and reaction speed of the concrete.
또한, 상기 소결더스트는 이산화규소 10.9 중량%, 산화알루미늄 5.73 중량%, 산화철 16.1 중량%, 산화마그네슘 3.09 중량%, 산화칼슘 41.2 중량% 및 삼산화황 2.05 중량%가 함유되며, 분말도가 8000 내지 10000 cm2/g이고, 밀도가 2.8g/cm2를 나타내는데, 상기 천연무수석고와 동일한 역할을 하기 때문에, 천연무수석고의 사용량을 줄여 제조비용을 절감하는 역할을 한다.The sintered dust contains 10.9% by weight of silicon dioxide, 5.73% by weight of aluminum oxide, 16.1% by weight of iron oxide, 3.09% by weight of magnesium oxide, 41.2% by weight of calcium oxide and 2.05% by weight of sulfur trioxide, and 2 / g, a density of for indicating 2.8g / cm 2, and serves to, because the same function as the natural anhydrite, reducing the production cost savings the use of natural anhydrite.
상기 소결더스트의 함량이 15 중량% 미만이면 상기의 효과가 미미하며, 상기 소결더스트의 함량이 20 중량%를 초과하게 되면 콘크리트의 압축강도가 저하된다.
If the content of the sintered dust is less than 15 wt%, the above effect is insignificant. If the content of the sintered dust exceeds 20 wt%, the compressive strength of the concrete is lowered.
상기 천연무수석고는 2 내지 4 중량%가 함유되며, 콘크리트의 초기 강도와 반응 속도를 향상시키는 역할을 하는데, 이산화규소 1.15 중량%, 산화알루미늄 0.03 중량%, 산화철 0.04 중량%, 산화마그네슘 0.15 중량%, 산화칼슘 39.95 중량% 및 삼산화황 55 중량%가 함유된다.The natural anhydrous gypsum contains 2 to 4% by weight and improves the initial strength and reaction rate of the concrete. It contains 1.15% by weight of silicon dioxide, 0.03% by weight of aluminum oxide, 0.04% by weight of iron oxide, 0.15% by weight of magnesium oxide, 39.95 wt% of calcium oxide, and 55 wt% of sulfur trioxide.
상기 천연무수석고의 함량이 2 중량% 미만이면 상기의 효과가 미미하며, 상기 천연무수석고의 함량이 4 중량%를 초과하게 되면 제조비용을 증가시키게 된다.
If the content of the natural anhydrous gypsum is less than 2% by weight, the above effect is insignificant. If the content of the natural anhydrite is more than 4% by weight, the production cost is increased.
이하에서는, 본 발명에 따른 소결더스트를 활용한 콘크리트용 혼화재 조성물의 제조방법 및 그 제조방법을 통해 제조된 콘크리트의 물성을 실시예를 들어 설명하기로 한다.
Hereinafter, the method for manufacturing the admixture composition for concrete using the sintered dust according to the present invention and the physical properties of the concrete manufactured through the method will be described with reference to examples.
<실시예 1>≪ Example 1 >
포틀랜드 시멘트 427kg, 혼화재 22.5kg(슬래그 미분말 55 중량%, 플라이 애시 25 중량%, 소결더스트 17 중량% 및 천연무수석고 3 중량%), 표준사 1350kg 및 물 225L를 콘크리트 교반기에 투입하고 600rpm의 속도로 10분 동안 교반하여 콘크리트 조성물을 제조하였다.
425 kg of Portland cement, 22.5 kg of admixture (55% by weight of slag fine powder, 25% by weight of fly ash, 17% by weight of sintered dust and 3% by weight of natural anhydrous gypsum), 1350 kg of standard yarn and 225 L of water were poured into a concrete stirrer at a speed of 600 rpm The mixture was stirred for 10 minutes to prepare a concrete composition.
<실시예 2>≪ Example 2 >
포틀랜드 시멘트 405kg, 혼화재 45kg(슬래그 미분말 55 중량%, 플라이 애시 25 중량%, 소결더스트 17 중량% 및 천연무수석고 3 중량%), 표준사 1350kg 및 물 225L를 콘크리트 교반기에 투입하고 600rpm의 속도로 10분 동안 교반하여 콘크리트 조성물을 제조하였다.
405 kg of Portland cement and 45 kg of admixture (55% by weight of slag fine powder, 25% by weight of fly ash, 17% by weight of sintered dust and 3% by weight of natural anhydrous gypsum), 1350 kg of standard yarn and 225 L of water were charged into a concrete mixer, Lt; / RTI > for 1 minute to prepare a concrete composition.
<실시예 3>≪ Example 3 >
포틀랜드 시멘트 360kg, 혼화재 90kg(슬래그 미분말 55 중량%, 플라이 애시 25 중량%, 소결더스트 17 중량% 및 천연무수석고 3 중량%), 표준사 1350kg 및 물 225L를 콘크리트 교반기에 투입하고 600rpm의 속도로 10분 동안 교반하여 콘크리트 조성물을 제조하였다.
360 kg of Portland cement, 90 kg of admixture (55% by weight of slag fine powder, 25% by weight of fly ash, 17% by weight of sintered dust and 3% by weight of natural anhydrous gypsum), 1350 kg of standard yarn and 225 L of water were charged into a concrete mixer, Lt; / RTI > for 1 minute to prepare a concrete composition.
<비교예 1>≪ Comparative Example 1 &
포틀랜드 시멘트 450kg, 표준사 1350kg 및 물 225L를 콘크리트 교반기에 투입하고 600rpm의 속도로 10분 동안 교반하여 콘크리트 조성물을 제조하였다.
450 kg of Portland cement, 1350 kg of standard yarn and 225 L of water were charged into a concrete mixer and stirred at a speed of 600 rpm for 10 minutes to prepare a concrete composition.
상기 실시예 1 내지 3 및 비교예 1을 통해 제조된 콘크리트 조성물의 3일, 7일 및 28일 후에 압축강도를 측정하여 아래 표 1에 나타내었다.The compressive strengths of the concrete compositions prepared through Examples 1 to 3 and Comparative Example 1 were measured after 3 days, 7 days, and 28 days, and the results are shown in Table 1 below.
{단, 압축강도의 측정은 UTM(Universal Testing Machine)을 이용하여 측정하였으며, 공시체는 KS F 2403의 규정에 의거하여 제조하였다.}
(However, the measurement of the compressive strength was carried out using UTM (Universal Testing Machine), and the specimen was manufactured in accordance with the provisions of KS F 2403.}
<표 1><Table 1>
위에 표 1에 나타낸 것처럼, 본 발명의 실시예 1 내지 3을 통해 제조된 콘크리트 조성물 비교예 1을 통해 제조된 콘크리트 조성물에 비해 우수한 압축강도를 나타내는 것을 알 수 있다.As shown in Table 1 above, it can be seen that the concrete composition produced through Examples 1 to 3 of the present invention exhibits excellent compressive strength as compared with the concrete composition prepared by Comparative Example 1.
또한, 본 발명에 따른 소결더스트를 활용한 콘크리트용 혼화재 조성물이 함유되어 콘크리트의 초기반응속도를 향상시켜 증기양생의 속도를 증가시키며, 콘크리트의 유동성을 증가시켜 성형틀에서 탈형이 잘 되며, 탈형 후에는 표면이 매끄러운 콘크리트가 제공되고, 천연무수석고의 사용량을 줄어들기 때문에 제조비용이 절감된다.In addition, since the admixture composition for concrete using the sintered dust according to the present invention is contained, the initial reaction speed of the concrete is improved to increase the speed of steam curing, and the fluidity of the concrete is increased, so that the mold is well demoulded, Provides a smooth surface, reduces the use of natural anhydrous gypsum, thus reducing manufacturing costs.
Claims (10)
상기 소결더스트는 제철 소결 공정에서 발생하는 것으로, 분말도가 8000 내지 10000 cm2/g이며, 밀도가 2.8g/cm2인 것을 특징으로 하는 소결더스트를 활용한 콘크리트용 혼화재 조성물.
50 to 60% by weight of slag fine powder, 20 to 30% by weight of fly ash, 15 to 20% by weight of sintered dust and 2 to 4% by weight of natural anhydrous gypsum,
Wherein the sintered dust is generated in a sintering process of iron and has a powdery figure of 8000 to 10000 cm 2 / g and a density of 2.8 g / cm 2 .
상기 소결더스트를 활용한 콘크리트용 혼화재 조성물은 슬래그 미분말 55 중량%, 플라이 애시 25 중량%, 소결더스트 17 중량% 및 천연무수석고 3 중량%로 이루어지는 것을 특징으로 하는 소결더스트를 활용한 콘크리트용 혼화재 조성물.
The method according to claim 1,
The admixture composition for concrete using the sintered dust is characterized by comprising 55 wt% of slag fine powder, 25 wt% of fly ash, 17 wt% of sintered dust, and 3 wt% of natural anhydrous gypsum .
상기 슬래그 미분말은 에이징 처리된 제강 슬래그로 이루어지는 것을 특징으로 하는 소결더스트를 활용한 콘크리트용 혼화재 조성물.
The method according to claim 1 or 3,
Wherein the slag fine powder is composed of steel making slag subjected to aging treatment.
상기 슬래그 미분말은 이산화규소 35.16 중량%, 산화알루미늄 14.92 중량%, 산화철 0.4 중량%, 산화마그네슘 4.29 중량% 및 산화칼슘 42.86 중량%가 함유되는 것을 특징으로 하는 소결더스트를 활용한 콘크리트용 혼화재 조성물.
The method according to claim 1 or 3,
Wherein the slag fine powder contains 35.16% by weight of silicon dioxide, 14.92% by weight of aluminum oxide, 0.4% by weight of iron oxide, 4.29% by weight of magnesium oxide and 42.86% by weight of calcium oxide.
상기 플라이 애시는 이산화규소 56.27 중량%, 산화알루미늄 23.36 중량%, 산화철 7.28 중량%, 산화마그네슘 1.31 중량%, 산화칼슘 4.27 중량% 및 삼산화황 3.18 중량%가 함유되는 것을 특징으로 하는 소결더스트를 활용한 콘크리트용 혼화재 조성물.
The method according to claim 1 or 3,
Wherein the fly ash contains 56.27% by weight of silicon dioxide, 23.36% by weight of aluminum oxide, 7.28% by weight of iron oxide, 1.31% by weight of magnesium oxide, 4.27% by weight of calcium oxide and 3.18% by weight of sulfur trioxide. / RTI >
상기 소결더스트는 이산화규소 10.9 중량%, 산화알루미늄 5.73 중량%, 산화철 16.1 중량%, 산화마그네슘 3.09 중량%, 산화칼슘 41.2 중량% 및 삼산화황 2.05 중량%가 함유되는 것을 특징으로 하는 소결더스트를 활용한 콘크리트용 혼화재 조성물.
The method according to claim 1 or 3,
Wherein the sintered dust comprises 10.9% by weight of silicon dioxide, 5.73% by weight of aluminum oxide, 16.1% by weight of iron oxide, 3.09% by weight of magnesium oxide, 41.2% by weight of calcium oxide and 2.05% by weight of sulfur trioxide. / RTI >
상기 천연무수석고는 이산화규소 1.15 중량%, 산화알루미늄 0.03 중량%, 산화철 0.04 중량%, 산화마그네슘 0.15 중량%, 산화칼슘 39.95 중량% 및 삼산화황 55 중량%가 함유되는 것을 특징으로 하는 소결더스트를 활용한 콘크리트용 혼화재 조성물.The method according to claim 1 or 3,
Wherein the natural anhydrous gypsum contains 1.15% by weight of silicon dioxide, 0.03% by weight of aluminum oxide, 0.04% by weight of iron oxide, 0.15% by weight of magnesium oxide, 39.95% by weight of calcium oxide and 55% by weight of sulfur trioxide Admixture composition for concrete.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102694665B1 (en) | 2022-08-10 | 2024-08-14 | 주식회사 지안산업 | Ground solidified composition for improving soft ground |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100457419B1 (en) * | 2003-12-26 | 2004-11-16 | 주식회사한국포조텍 | Cement additives by means of slag |
| KR101359277B1 (en) * | 2012-10-26 | 2014-02-07 | 재단법인 포항산업과학연구원 | Concrete composition having improved initial strength and concrete structure prepared by the same |
| KR101359187B1 (en) | 2012-10-26 | 2014-02-07 | 재단법인 포항산업과학연구원 | Concrete composition with reduced shrinkage property and concrete structure prepared by the same |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100457419B1 (en) * | 2003-12-26 | 2004-11-16 | 주식회사한국포조텍 | Cement additives by means of slag |
| KR101359277B1 (en) * | 2012-10-26 | 2014-02-07 | 재단법인 포항산업과학연구원 | Concrete composition having improved initial strength and concrete structure prepared by the same |
| KR101359187B1 (en) | 2012-10-26 | 2014-02-07 | 재단법인 포항산업과학연구원 | Concrete composition with reduced shrinkage property and concrete structure prepared by the same |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102694665B1 (en) | 2022-08-10 | 2024-08-14 | 주식회사 지안산업 | Ground solidified composition for improving soft ground |
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