KR20180075747A - Composition for White Cement - Google Patents
Composition for White Cement Download PDFInfo
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- KR20180075747A KR20180075747A KR1020160179141A KR20160179141A KR20180075747A KR 20180075747 A KR20180075747 A KR 20180075747A KR 1020160179141 A KR1020160179141 A KR 1020160179141A KR 20160179141 A KR20160179141 A KR 20160179141A KR 20180075747 A KR20180075747 A KR 20180075747A
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- furnace slag
- blast furnace
- powder
- present
- white cement
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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
- C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
- C04B22/06—Oxides, Hydroxides
- C04B22/062—Oxides, Hydroxides of the alkali or alkaline-earth metals
- C04B22/064—Oxides, Hydroxides of the alkali or alkaline-earth metals of the alkaline-earth metals
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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
- C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
- C04B22/08—Acids or salts thereof
- C04B22/14—Acids or salts thereof containing sulfur in the anion, e.g. sulfides
- C04B22/142—Sulfates
- C04B22/143—Calcium-sulfate
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/80—Optical properties, e.g. transparency or reflexibility
- C04B2111/802—White 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
Abstract
Description
본 발명은 백색 시멘트 조성물에 관한 것이다. 보다 상세하게는, 본 발명은 고로 슬래그 미분말을 주재료로 하고, 압축강도가 우수하며, 경화속도가 빠르고 백색도가 뛰어난 친환경적인 백색 시멘트 조성물에 관한 것이다. 고로 슬래그 미분말을 주재료로 사용함으로써 제조 원가를 크게 줄일 수 있으며 친환경적인 백색 시멘트 조성물에 관한 것이다.The present invention relates to a white cement composition. More particularly, the present invention relates to an environmentally friendly white cement composition having a blast furnace slag fine powder as a main material, excellent compressive strength, fast curing speed and excellent whiteness. The present invention relates to an environmentally friendly white cement composition which can significantly reduce manufacturing cost by using blast furnace slag fine powder as a main material.
백색 시멘트는 일반 포틀랜드 시멘트의 2차 제품으로 건물의 미관을 위해 내외장재로, 끝마감 바름, 물갈기시공 외에도 인조대리석, 각종 건축마감재의 2차 제품 등에 주로 사용되고 있다. 백색 시멘트를 제조하기 위해서는 순도 높은 재료(Fe2O3<0.35)와 별도의 추가적인 공정(가열 시 더 높은 온도 및 급냉 과정)이 필요하다. White cement is a secondary product of general Portland cement. It is mainly used for interior and exterior materials for the beauty of the building, besides the end curtain, water grind, artificial marble and secondary products of various construction finishes. To manufacture white cement, an additional process (higher temperature and quench process on heating) is required in addition to the higher purity material (Fe2O3 <0.35).
또, 포틀랜드시멘트 생산 기술을 기반으로 하기 때문에 고순도 석회석(CaCO3)을 고온(1450℃ 이상)으로 소성하여 CaO와 CO2로 분리하는 기본 과정을 거치므로 다량의 에너지소비와 함께 이산화탄소(CO2)를 발생시키는 대표적인 에너지 과소비형 공해유발 산업이다. In addition, since it is based on Portland cement production technology of high purity limestone (CaCO 3) a high temperature by firing (more than 1450 ℃) so mounted to the basic process of separating into CaO and CO 2 carbon dioxide with a large amount of energy consumption (CO 2) Is a typical energy-consuming pollution-inducing industry.
또한, 상기 백색 포틀랜드 시멘트는 그 원료인 납석, 형석 등의 천연자원 국내부존이 절대 부족하여 현재 우리나라에서 생산되지 않고 전량 중국 등에서 수입해 사용하고 있는 현실이다.In addition, the above-mentioned white portland cement is not produced in Korea currently, but is imported from China and the like, because the natural resources such as pyrophyllite, fluorite and the like are in short supply in the domestic market.
본 발명은 이러한 문제점을 해결하기 위한 것으로, 산업부산물인 제철소 부산물인 고로 슬래그 미분말에 저가의 혼화제를 상온(20~30℃)에서 혼합하여 제조함으로써 에너지 사용량과 CO2 발생량을 기존 포틀랜드 백색시멘트 대비 10% 이하로 줄일 수 있고 자원을 재활용한 에너지 친환경 시멘트 조성물의 제조방법을 개발하였다.The present invention solves this problem by mixing a low cost blend of blast furnace slag powder, which is a by-product of the steel industry by-product, at room temperature (20 to 30 ° C), thereby reducing energy consumption and CO 2 generation from 10 %, And recycled resources, and developed a method for producing an energy-eco-friendly cement composition.
상기 본 발명의 목적을 달성하기 위한 백색 시멘트 조성물은 고로 슬래그 75~85중량%, Ca(OH)2 5~15중량%, 경질 CaCO3 3~8중량%, 및 석고 3~8중량%를 포함하는 것을 특징으로 한다. The white cement composition for achieving the object of the present invention comprises 75 to 85% by weight of blast furnace slag, 5 to 15% by weight of Ca (OH) 2 , 3 to 8% by weight of hard CaCO 3 , and 3 to 8% by weight of gypsum .
본 발명의 백색 시멘트 조성물은 우수한 압축강도와 백색도를 나타내며, 에너지 사용량과 CO2 발생량을 기존 포틀랜드 시멘트 대비 10% 이하로 줄일 수 있고 자원을 재활용한 친환경 조성물이다. The white cement composition of the present invention exhibits excellent compressive strength and whiteness and is an eco-friendly composition which can reduce energy consumption and CO 2 generation amount to less than 10% of conventional portland cement and recycle resources.
본 발명은 고로 슬래그 75~85중량%, Ca(OH)2 5~15중량%, 경질 CaCO3 3~8중량%, 및 석고 3~8중량%를 포함하는 백색 시멘트 조성물에 관한 것이다. The present invention relates to a blast furnace slag comprising 75 to 85% by weight of blast furnace slag, Ca (OH) 2 5 to 15 wt%, hard CaCO 3 3 to 8 wt%, and gypsum 3 to 8 wt%.
상기 고로 슬래그 미분말은 제철공정에서 발생하는 고로 슬래그를 건조하고 분쇄하여 생산되는 공산품으로서, KS 규격(KS F 2563)이 제정되어 있으며, 시중에 유통되고 있는 공산품이다. 본 발명의 백색 시멘트 조성물의 주성분이다. 상기 고로 슬래그 미분말은 상기 분말도(비표면적) 3000~8,000㎠/g이고, 고로 슬래그 미분말 중의 산화제이철 함량이 고로 슬래그 미분말의 전체 중량에 대해 0.5 중량% 미만인 것이 바람직하다. 입자크기가 이보다 크면 대기 중에 노출되는 표면적이 충분하지 못하여 그 백색도가 충분한 수준이 되지 않는다. 분말도가 너무 높을 경우 초기 활성도는 좋으나 장기강도가 상대적으로 부족하여 사용상 바람직하지 않다. 따라서 본 발명에서는 충분한 분말도와 강도를 가진 고로 슬래그 미분말을 사용하는 것이 바람직하다. 고로 슬래그 미분말의 분말도(비표면적)가 3000㎠/g미만이면 대기 중에 노출되는 면적이 적어 백색도가 충분치 않아 백색무기결합재로 사용하기에 적합하지 않으며, 분말도(비표면적)가 8,000㎠/g을 초과하면 초기 활성도는 충분한 반면 장기 강도가 부족하여 소정의 목적을 달성할 수가 없다. 또, 산화제이철(Fe2O3) 성분 0.5 중량% 미만인 것이 바람직하다. 산화제이철(Fe2O3) 성분이 0.5 중량% 이상이면 고로 슬래그의 분말도가 충분하다 하더라도 고로 슬래그 자체의 색상이 갈색을 띄기 때문에 원재료로 사용하기에 적합하지 않다. The blast furnace slag fine powder is a manufactured article produced by drying and pulverizing blast furnace slag generated in a steel making process, and it is a commercial product which has been established in the KS standard (KS F 2563) and is distributed on the market. It is the main component of the white cement composition of the present invention. It is preferable that the blast furnace slag fine powder has the above powder surface (specific surface area) of 3000 to 8,000 cm 2 / g, and the oxidant ferrite content in the blast furnace slag fine powder is less than 0.5 wt% based on the total blast furnace slag fine powder. If the particle size is greater than this, the surface area exposed to the atmosphere is not sufficient and the whiteness is not sufficient. When the powdery degree is too high, the initial activity is good, but the long-term strength is relatively inadequate for use. Therefore, in the present invention, it is preferable to use a blast furnace slag powder having sufficient powder and strength. When the blast furnace slag powder (specific surface area) is less than 3000 cm < 2 > / g, the area exposed to the atmosphere is small and the whiteness is not sufficient. Therefore, the blast furnace slag powder is not suitable for use as a white inorganic binder. , The initial activity is sufficient while the long-term strength is insufficient to achieve the predetermined purpose. It is also preferable that the content of the oxidizing agent ferrous (Fe 2 O 3 ) component is less than 0.5% by weight. If the content of the oxidizing agent (Fe 2 O 3 ) is 0.5% by weight or more, even though the blast furnace slag has a sufficient degree of powder, the blast furnace slag itself is not suitable for use as a raw material because its color is brown.
수산화칼슘(Ca(OH)2)은 알칼리 촉진제, 즉 경화 활성화제로 사용되며, 5~15중량% 함유되는 것이 바람직하다. 5중량% 이하로 사용되는 경우에는 기포 발생이 현저히 줄어들고 강도가 저하되며, 15중량% 이상인 경우에는 기포 형상이 일정하지 않고 백화현상이 나타나며 표면에 팽창균열이 발생하고 결합재의 결합력이 저하된다.Calcium hydroxide (Ca (OH) 2 ) is used as an alkali promoter, i.e., a curing activator, and is preferably contained in an amount of 5 to 15% by weight. When it is used in an amount of less than 5% by weight, the formation of bubbles is remarkably reduced and the strength is lowered. When the amount is more than 15% by weight, the bubble shape is not uniform, whitening occurs, expansion cracks are generated on the surface,
탄산칼슘은 5~8중량%로 배합되는 것이 바람직하고, 경질 탄산칼슘을 사용하여야 한다. 본 발명의 경질 탄산칼슘은 본 발명의 백색 시멘트 조성물의 강도 강화제로 사용되며, 이 경질 탄산칼슘에 의해 강도와 백색도가 모두 향상되는 것을 발견하였다. 또한 분말도가 5000㎠/g 이상인 것을 사용하여야 하고, 특히 분말도 5000~10000㎠/g인 경질 탄산칼슘을 사용하는 것이 바람직하다. The calcium carbonate is preferably blended in an amount of 5 to 8% by weight and hard calcium carbonate should be used. The hard calcium carbonate of the present invention is used as a strength enhancer of the white cement composition of the present invention, and it has been found that the hard calcium carbonate improves both strength and whiteness. Also, it is preferable to use a powder having a degree of powder of 5000 cm 2 / g or more, particularly preferably a hard calcium carbonate having a powder of 5000 to 10000 cm 2 / g.
분말도가 이보다 낮으면 본 발명의 시멘트 조성물의 백색도와 압축 강도가 떨어지게 된다. 본 발명에 사용되는 경질 탄산 칼슘은 이산화탄소를 포집한 것을 사용한다. 또한, 상기 경질 탄산칼슘의 배합량은 상기 석고의 배합량과 동일하거나 유사한 것이 바람직하다If the degree of the powder is lower than this, the whiteness and compressive strength of the cement composition of the present invention are lowered. The hard calcium carbonate used in the present invention is one obtained by collecting carbon dioxide. It is preferable that the blending amount of the hard calcium carbonate is the same as or similar to the blending amount of the gypsum
석고는 천연석고 또는 탈황석고 등으로서, 이수, 반수, Ⅲ형 무수 또는 Ⅱ형 무수 등 어떤 형태로든 이용이 가능하다. 현재 일반 폐기물로 분류되어 있는 폐인산 석고의 경우 국내 비료공장에서 부산물로서 연간 약 200만 톤 이상이 배출되고 있으며, 약 2천만톤 가량의 폐석고가 적치장에 적치되어 있다. 따라서 이러한 폐석고의 처리문제가 심각한 문제로 대두되고 있는 실정인바, 본 발명에서는 중화 또는 하소 등의 간단한 전처리를 통해 쉽게 이용이 가능하다. 본 발명에서는 이러한 석고를 시멘트 전체 3~8%를 혼화한다. 이때 석고를 3중량% 이하로 혼화하는 경우에는 시멘트의 강도가 충분히 발현되지 않고 반대로 석고를 과량 혼화할 경우에는 고로 슬래그와 반응하지 못한 여분의 석고가 수화생성물 사이에 응집상태로 존재하면서 이들의 결합력을 약화시키기 때문에 오히려 강도가 떨어지게 된다. 따라서, 본 발명에서는 석고를 3~8중량%를 첨가하는 것이 바람직하다.The gypsum is natural gypsum or desulfurization gypsum, and it can be used in any form such as irrigation, half-life, anhydrous form III or anhydrous form II. In the case of pulpite gypsum currently classified as general waste, about 2 million tons of by-product is emitted annually from the domestic fertilizer factory, and approximately 20 million tons of waste rock is accumulated in the stockpile. Therefore, the problem of disposal of such waste rocks is becoming a serious problem, and the present invention can be easily used by simple pretreatment such as neutralization or calcination. In the present invention, such gypsum is mixed with 3 to 8% of the whole cement. In this case, when the gypsum is mixed with less than 3 wt%, the strength of the cement is not sufficiently developed. On the contrary, when the gypsum is excessively mixed, the extra gypsum that has not reacted with the blast furnace slag is aggregated between the hydration products, So that the strength is lowered. Therefore, in the present invention, 3 to 8 wt% of gypsum is preferably added.
실시 예 1Example 1
분말도 4500㎠/g의 고로 슬래그 미분말 80kg, 수산화칼슘 10kg, 분말도 5050㎠/g의 경질 탄산칼슘 5kg, 석고 5kg을 상온에서 강제식 믹서로 균질하게 혼합하여 백색 시멘트 조성물을 제조하였다. 제조된 시료를 이용하여 백색도 시험 등 KS L 5204 : 2012(백색 포틀랜드 시멘트) 규격에 정해진 물리성능 시험을 실시하였다.A white cement composition was prepared by homogeneously mixing 80 kg of a blast-furnace slag powder having a particle size of 4500 cm < 2 > / g, 10 kg of calcium hydroxide, 5 kg of hard calcium carbonate having a powderity of 5050 cm2 / g, and 5 kg of gypsum at room temperature with a forced mixer. The manufactured samples were subjected to physical performance tests as specified in the KS L 5204: 2012 (white Portland cement) standard, such as whiteness test.
실시 예 2Example 2
분말도 4500㎠/g의 고로 슬래그 미분말 85kg, 수산화칼슘 7kg, 분말도 5050㎠/g의 경질 탄산칼슘 4kg, 석고 4kg을 상온에서 강제식 믹서로 균질하게 혼합하여 백색 시멘트 조성물을 제조하였다. 제조된 시료를 이용하여 백색도 시험 등 KS L 5204 : 2012(백색 포틀랜드 시멘트) 규격에 정해진 물리성능 시험을 실시하였다.85 kg of blast furnace slag powder of 4500 cm 2 / g powder, 7 kg of calcium hydroxide, 4 kg of hard calcium carbonate of 5050 cm 2 / g powder and 4 kg of gypsum were homogeneously mixed at room temperature with a forced mixer to prepare a white cement composition. The manufactured samples were subjected to physical performance tests as specified in the KS L 5204: 2012 (white Portland cement) standard, such as whiteness test.
실시 예 3Example 3
분말도 4500㎠/g의 고로 슬래그 미분말 75kg, 수산화칼슘 13kg, 분말도 5050㎠/g의 경질 탄산칼슘 6kg, 석고 6kg을 상온에서 강제식 믹서로 균질하게 혼합하여 백색 시멘트 조성물을 제조하였다. 제조된 시료를 이용하여 백색도 시험 등 KS L 5204 : 2012(백색 포틀랜드 시멘트) 규격에 정해진 물리성능 시험을 실시하였다.A white cement composition was prepared by uniformly mixing 75 kg of blast furnace slag with a powder density of 4500 cm < 2 > / g, 13 kg of calcium hydroxide, 6 kg of hard calcium carbonate of 5050 cm 2 / g powder and 6 kg of gypsum at room temperature with a forced mixer. The manufactured samples were subjected to physical performance tests as specified in the KS L 5204: 2012 (white Portland cement) standard, such as whiteness test.
비교 예 1Comparative Example 1
분말도 4500㎠/g의 고로 슬래그 미분말 75kg, 수산화칼슘 13kg, 분말도 3050㎠/g의 경질 탄산칼슘 6kg, 석고 6kg을 상온에서 강제식 믹서로 균질하게 혼합하여 백색 시멘트 조성물을 제조하였다. 제조된 시료를 이용하여 백색도 시험 등 KS L 5204 : 2012(백색 포틀랜드 시멘트) 규격에 정해진 물리성능 시험을 실시하였다.75 kg of blast furnace slag powder of 4500 cm 2 / g, 13 kg of calcium hydroxide, 6 kg of hard calcium carbonate of 3050 cm 2 / g of powder and 6 kg of gypsum were homogeneously mixed at room temperature with a forced mixer to prepare a white cement composition. The manufactured samples were subjected to physical performance tests as specified in the KS L 5204: 2012 (white Portland cement) standard, such as whiteness test.
물리 성능 시험방법 및 결과Physical performance test methods and results
아래 표 1에 나타낸 바와 같이 각각의 시험은 KS 및 ISO 시험표준에 의해 실시하였다.Each test was conducted according to KS and ISO test standards as shown in Table 1 below.
시험 명 시험 방법Test name Test method
시료채취 KS L 5101Sampling KS L 5101
분말도 KS L 5106Powder type KS L 5106
안정도 KS L 5107Stability KS L 5107
응결시간 KS L 5108Coagulation time KS L 5108
압축강도 KS L ISO 679Compressive strength KS L ISO 679
백색도 KS L 5113Whiteness degree KS L 5113
아래 표 1에는 KS 규격의 기준, 그리고 본 발명의 실시예의 시험성과를 나타내었다.Table 1 below shows the standards of the KS standard and the test results of the embodiments of the present invention.
1Comparative Example
One
Blaine 방법Powder figure (specific surface area)
Blaine method
상기 표에서 알 수 있는 바와 같이, 본 발명의 실시 예의 경우 KS 규격을 만족할 뿐 아니라 우수한 강도와 백색도를 나타낸다. As can be seen from the above table, the embodiment of the present invention not only satisfies the KS standard but also exhibits excellent strength and whiteness.
Claims (3)
Blast furnace slag 75 to 85% by weight, Ca (OH) 2 5 to 15 wt%, hard CaCO 3 3 to 8 wt%, and gypsum 3 to 8 wt% are mixed at 20 to 30 캜.
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