KR101792062B1 - Pumice Stone as Alternative to Flyash for Cement Admixtures and Concrete Composition Using the Same - Google Patents
Pumice Stone as Alternative to Flyash for Cement Admixtures and Concrete Composition Using the Same Download PDFInfo
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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
- C04B28/02—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 hydraulic cements other than calcium sulfates
- C04B28/021—Ash cements, e.g. fly ash cements ; Cements based on incineration residues, e.g. alkali-activated slags from waste incineration ; Kiln dust cements
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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
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/02—Granular materials, e.g. microballoons
- C04B14/04—Silica-rich materials; Silicates
- C04B14/06—Quartz; Sand
- C04B14/062—Microsilica, e.g. colloïdal silica
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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
- C04B18/12—Waste materials; Refuse from quarries, mining or the like
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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
- C04B22/0093—Aluminates
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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
- 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
- C04B22/147—Alkali-metal sulfates; Ammonium sulfate
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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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- Y02W30/93—
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- Chemical & Material Sciences (AREA)
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- Organic Chemistry (AREA)
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- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
Description
본 발명은 폐자원의 하나인 석탄경석의 적극적인 재활용을 위한 기술로서, 석탄경석의 플라이애시 대체용 시멘트 혼화재로서의 적용성에 관한 것이다. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technology for positively recycling coal pumice which is one of waste resources, and its applicability as a cement admixture for replacing fly ash of coal pumice.
광산에서 석탄을 캐는 과정에서 석탄에 돌이 많이 섞이면 버리게 되는데, 이를 석탄경석이라고 부른다. 석탄경석은 크게 채광과정에서 발생되는 굴진경석과 선탄공정에서 발생되는 선탄경석으로 구분하기도 한다. 통상 석탄경석은 기준열량 2,000kcal/kg 이하의 폐석과 함께 저열량 석탄을 포함하고 있으며, 경제성을 이유로 관심받지 못한 채 광산 근처에 쌓아두는 실정이다. In the process of picking coal from a mine, when the coal is mixed with a lot of stones, it is called coal pumice. The coal pumice is divided into the pumped pumice generated in the mining process and the pumice generated in the shipbuilding process. Generally, coal pumice contains low-calorific coal with a reference calorie of 2,000 kcal / kg or less and accumulates it in the vicinity of a mine without being interested because of economical efficiency.
국내에서 석탄경석은 1980년대 말부터 1990년 초까지 폐광된 석탄광산에 약 2억톤이 적치되어 있고, 현재 가동중인 5개 탄광에서 연간 70만톤 이상 발생하는 것으로 추정된다. 그런데 석탄경석을 그대로 방치하면 인근 하천의 중금속 오염 및 적치사면 붕괴 등 문제를 일으킨다. 이에 따라 관련법을 제정하여 광해복구사업을 통해 관리하고 있다. 광해복구사업에 따르면 석탄경석은 다른 곳에 버릴 수도 없는데, 특히 강원도는 국내 총 적치량의 80%에 달하는 석탄경석이 쌓여 있어 상당한 골칫거리가 되고 있다. In Korea, coal pumice is estimated to be about 200 million tonnes in abandoned coal mines from the late 1980s to early 1990s, and more than 700,000 tons annually in five coal mines currently in operation. However, if the coal pumice is left untouched, it causes problems such as heavy metal contamination in the nearby rivers and collapse of the slope. Accordingly, related laws have been enacted and managed through photonics restoration projects. According to the mining recovery business, coal pits can not be discarded elsewhere. In particular, Gangwon-do has become a serious problem because coal pits, which account for 80% of the total amount in Korea, are piled up.
한편 플라이애시는 화력발전소에서 발생하는 부산물로서, 1980년대까지 주로 해안 매립용으로 사용되어 왔으나, 이후 현재까지 경제성과 산업 부산물의 재활용이라는 측면에서 콘크리트의 품질개선과 시멘트 대체를 위한 혼화재료로 적극 활용되고 있다. 콘크리트에서 플라이애시는 수화열 감소, 수밀성 및 내구성의 증가 등에 기여하지만, 강도 발현율이 낮고 건조수축이 커지는 단점을 나타낸다.Fly ash is a by-product from coal-fired power plants and has been mainly used for coastal landfilling until the 1980s, but since then it has been actively used as an admixture for improving the quality of concrete and replacing cement in terms of economic efficiency and recycling of industrial by- . In concrete, fly ash contributes to decrease hydration heat, increase watertightness and durability, but it has a disadvantage of low strength development rate and large drying shrinkage.
본 발명은 폐자원의 하나인 석탄경석의 적극적인 재활용을 위해 개발된 것으로서, 석탄경석을 플라이애시를 대체하는 혼화재로 활용할 수 있는 방안을 제공하는데 기술적 과제가 있다.The present invention has been developed for aggressive recycling of coal pumice which is one of the waste resources, and there is a technical problem to provide a method for utilizing coal pumice as an admixture replacing fly ash.
상기한 기술적 과제를 해결하기 위해 본 발명은, 시멘트와 플라이애시를 포함하여 조성되는 결합재로 배합하는 시멘트 혼합물에서 플라이애시를 대체하는 시멘트 혼화재로서, 분말도 3,000~4,500㎠/g와 비중 2.3~2.7을 가지고 60±6중량%의 SiO2와 20±5중량%의 Al2O3를 함유하는 석탄경석 미분말인 것을 특징으로 하는 플라이애시 대체용 시멘트 혼화재를 제공한다. In order to solve the above technical problems, the present invention is a cement admixture replacing fly ash in a cement mixture comprising a cement and a fly ash, wherein the powder has a particle size of 3,000 to 4,500 cm 2 / g and a specific gravity of 2.3 to 2.7 And 60 to 6 wt% of SiO 2 and 20 to 5 wt% of Al 2 O 3 , based on the total weight of the cement admixture for fly ash.
나아가 본 발명은 석탄경석 미분말로 마련된 시멘트 혼화재와 시멘트를 포함하여 조성되는 결합재로 배합하는 콘크리트로서, 플라이애시 대체용 시멘트 혼화재가 결합재 총량의 1~30중량%로 포함되는 것을 특징으로 하는 콘크리트 조성물을 제공한다.Further, the present invention provides a concrete composition comprising a cement admixture prepared from coal pumice powder and a binder comprising cement, wherein the cement admixture for replacing fly ash is contained in an amount of 1 to 30 wt% to provide.
본 발명에 따르면 다음과 같은 효과가 기대된다.According to the present invention, the following effects are expected.
첫째, 폐자원의 하나인 석탄경석을 적극적으로 재활용할 수 있기 때문에 경제성을 확보하고 환경문제를 개선할 수 있다.First, coal pumice, one of the waste resources, can be recycled positively, thus securing economic efficiency and improving environmental problems.
둘째, 본 발명에 따른 석탄경석에 의한 시멘트 혼화재는 플라이애시와 비교할 때 콘크리트의 초기강도는 동등하고 장기강도는 유리하게 발현하기 때문에 내구적인 측면에서 플라이애시보다 더욱 효과적으로 적용할 수 있다. Second, the coal pumice admixture according to the present invention can be applied more effectively than fly ash in terms of durability because the initial strength of concrete is equal to that of fly ash and long-term strength is advantageously exhibited.
셋째, 콘크리트 배합에서 석탄경석에 의한 시멘트 혼화재를 알칼리 자극제와 함께 사용한다면 초기강도 증진과 유동성 향상까지 기대할 수 있다.Third, if the cement admixture by coal pumice is used together with the alkali irritant in the concrete mixture, the initial strength improvement and the fluidity improvement can be expected.
본 발명은 플라이애시를 대체할 수 있는 시멘트 혼화재에 관한 것으로, 시멘트 혼합물에서 결합재로 시멘트와 플라이애시를 포함하여 조성할 때 플라이애시를 대체하여 석탄경석을 채용한다는데 특징이 있다. 본 발명에서 시멘트 혼합물은 시멘트를 주요 결합재로 사용하는 혼합물을 통칭하며, 시멘트 페이스트, 모르타르, 콘크리트 등을 모두 포괄한다.The present invention relates to a cement admixture capable of replacing fly ash, and is characterized by adopting coal pumice as a substitute for fly ash in cement admixture including cement and fly ash as a binder. In the present invention, the cement mixture refers to a mixture using cement as a main binder, and includes cement paste, mortar, concrete, and the like.
구체적으로 본 발명에 따른 플라이애시 대체용 시멘트 혼화재는 석탄경석 미분말로서, 분말도가 3,000~4,500㎠/g이고 비중이 2.3~2.7이며, 60±6중량%의 SiO2와 20±5중량%의 Al2O3를 함유하는 것을 특징으로 한다. 이러한 석탄경석은 석탄광산에서 입수한 후 소성과정과 분쇄과정을 거쳐 준비하거나, 소성과정을 생략하고 바로 분쇄과정을 거쳐 준비할 수 있다.Specifically, the cement admixture for fly ash substitution according to the present invention is a coal pneumatic fine powder having a powder degree of 3,000 to 4,500 cm 2 / g, a specific gravity of 2.3 to 2.7, a SiO 2 content of 60 ± 6% and a SiO 2 content of 20 ± 5% Al 2 O 3 . These coal pits can be obtained from coal mines and then prepared through a calcination process and a crushing process, or can be prepared by pulverizing processes without omitting the calcination process.
실제 석탄경석의 화학적 성분을 확인한 결과 60±6중량%의 SiO2와 20±5중량%의 Al2O3를 함유하는 것으로 확인되었는데(시험예 [표 1] 참고), 이는 플라이애시의 성분 구성과 상당히 유사하다. SiO2와 Al2O3는 시멘트 구성 화합물인 C3S, C2S 등의 수화생성물인 Ca(OH)2와 서서히 반응하여 불용성 칼슘실리케이트 수화물(C-S-H gel)이나 칼슘알루미네이트 수화물(C-A-H gel)을 형성하여 그 조직을 더욱 치밀하게 만드는데, 플라이애시와 유사한 화학적 성분을 가지는 석탄경석 또한 플라이애시와 유사하게 작용할 것으로 기대된다. 실제 시험예를 통해 실험적으로 검증한 결과, 석탄경석은 플라이애시와 동등 이상의 압축강도를 발현하는 것으로 확인되었다. 이에 따라 석탄경석은 플라이애시를 대체하는 시멘트 혼화재로 사용 가능할 것으로 기대된다. The chemical composition of the actual coal pumice was confirmed to contain 60 ± 6 wt% SiO 2 and 20 ± 5 wt% Al 2 O 3 (see Test Example [Table 1]), . SiO 2 and Al 2 O 3 react slowly with Ca (OH) 2 , a hydration product of C 3 S and C 2 S, which are cement compounds, to form insoluble calcium silicate hydrate (CSH gel) and calcium aluminate hydrate (CAH gel) To make the structure more dense. It is expected that coal pumice having a chemical composition similar to that of fly ash will also act similarly to fly ash. Experimental verification of the test results showed that the coal pumice exhibited compressive strength equal to or higher than that of fly ash. Therefore, coal pumice is expected to be used as a cement admixture replacing fly ash.
나아가 본 발명은 시멘트 혼합물의 바람직한 일례로 콘크리트를 제안하는데, 콘크리트 배합에서 결합재를 석탄경석 미분말에 의한 시멘트 혼화재와 시멘트를 포함하여 조성되는 결합재로 사용하는 것이다. 여기서 석탄경석 미분말에 의한 시멘트 혼화재는 플라이애시의 통상적인 사용범위와 마찬가지로 사용하면 되며, 더욱 바람직하게는 결합재 총량의 1~30중량%로 사용한다. 이때 석탄경석 미분말에 의한 시멘트 혼화재는 플라이애시와 함께 사용하는 것도 가능하다.Further, the present invention proposes a concrete as a preferable example of the cement mixture, wherein the binder in the concrete mixture is used as a binder to be composed of the cement admixture and the cement by the coal pumice powder. Here, the cement admixture by the coal pumice fine powder may be used in the same manner as in the usual use range of fly ash, more preferably from 1 to 30% by weight of the total amount of the binder. At this time, the cement admixture made of coal pumice fine powder can be used together with fly ash.
또한 콘크리트 배합에는 결합재 조성에서 알칼리 자극제를 결합재 총량의 0.1~3.0중량% 더 포함하는 것이 더욱 바람직하다. 알칼리 자극제는 플라이애시 대체제로 사용하는 석탄경석 미분말의 활성화에 기여하는데, 그 결과 조기강도를 증진하고 유동성을 개선시킨다. 알칼리 자극제로는 콘크리트 배합에서 통상적으로 사용하는 재료를 사용할 수 있으며, 더욱 바람직하게는 특허 제10-1303195호에 따른 알칼리 자극제를 사용한다. 구체적으로 특허 제10-1303195호에 따른 알칼리 자극제는, 칼슘페리알루미네이트(Calcium Ferri-Aluminate, 4CaO·3(Al2O3, Fe2O3)·SO3) 분말 5~45중량%; 소듐칼슘설페이트(Sodium Calcium Sulfate, Na2Ca(SO4)2) 분말 12~45중량%; 괘상의 칼슘설페이트(Calcium Sulfate, CaSO4)에 실리카졸(Silica sol)이 첨가되어 분쇄된 칼슘설페이트-실리카졸 분쇄분말 25~83중량%;를 포함하여 구성된다. Further, it is more preferable that the concrete mixture contains 0.1 to 3.0% by weight of the total amount of the binder in the binder composition. Alkali irritants contribute to the activation of coal pumice fine powders used as fly ash substitutes, thereby improving early strength and improving fluidity. As the alkali stimulant, a material conventionally used in concrete formulation may be used, and more preferably, an alkali stimulant according to the Japanese Patent No. 10-1303195 is used. Specifically, the alkali stimulant according to Patent No. 10-1303195 comprises 5 to 45% by weight of calcium ferri-aluminate, 4CaO.3 (Al2O3, Fe2O3) SO3) powder; 12 to 45% by weight of sodium calcium sulfate (Na2Ca (SO4) 2) powder; And 25 to 83% by weight of pulverized calcium sulfate-silica sol pulverization powder in which silica sol is added to Calcium Sulfate (CaSO4) in the tablet.
이하에서는 시험예에 의거하여 본 발명을 상세히 살펴본다. 다만, 아래의 시험예는 본 발명을 예시하기 위한 것일 뿐이며, 본 발명의 범위가 이로써 한정되는 것은 아니다.Hereinafter, the present invention will be described in detail based on a test example. However, the following test examples are only for illustrating the present invention, and the scope of the present invention is not limited thereto.
[시험예] 석탄경석의 플라이애시 대체재로의 적용성 시험[Test Example] Test for applicability of coal pumice to fly ash substitute
1. One. 플라이애시와Fly ash 석탄경석Coal pumice
플라이애시와 석탄경석의 물리·화학적 특성을 조사한 결과, 아래 [표 1]과 같이 나타냈다.The physical and chemical properties of fly ash and coal pumice are shown in Table 1 below.
2. 콘크리트 배합2. Concrete formulation
아래 [표 2] 및 [표 3]과 같은 조건으로 콘크리트 배합하였다. 보는 바와 같이 플라이애시를 시멘트의 10~20중량% 치환하여 조성한 결합재로 콘크리트 배합한 것을 비교예로 하고, 플라이애시 대신 석탄경석을 치환하여 콘크리트 배합한 것을 실시예로 하였다. The concrete was mixed under the same conditions as in [Table 2] and [Table 3]. As shown in the figure, concrete was prepared by mixing fly ash with 10 to 20% by weight of cement in place of concrete, and concrete was substituted with coal pumite instead of fly ash.
콘크리트 배합에서 알칼리 자극제는 칼슘페리알루미네이트(CFA) 17중량%, 칼슘설페이트-실리카졸 분쇄분말(CS+SS) 55중량%, 소듐칼슘설페이트(SCS) 28중량%로 조성하여 준비하였다. 여기서 칼슘페리알루미네이트(CFA)는 (Al2O3 + Fe2O3) 함량이 전체 중량의 39%, Fe2O3/(Al2O3+Fe2O3)가 31중량%, 비중 2.87, 비표면적 5,430cm2/g 이상, 응결시간 초결 38분, 1일강도 44MPa, 3일강도 58MPa인 것을 사용하고, 칼슘설페이트-실리카졸 분쇄분말(CS+SS)는 비중 2.94의 괘상의 천연 무수석고(100 중량부)와 실리카졸(1중량부)를 혼합 분쇄 후 74㎛ 통과분을 사용하며, 소듐칼슘설페이트(SCS)는 SiO2 함량 30%, pH 10.2, 평균 입도 10nm, 점도(cps, 20℃) 24, 비중(20℃) 1.21인 것을 사용하였다. In the concrete formulation, the alkali stimulant was prepared by mixing 17% by weight of calcium ferrier aluminate (CFA), 55% by weight of calcium sulfate-silica sol pulverization powder (CS + SS) and 28% by weight of sodium calcium sulfate (SCS). The calcium ferrialuminate (CFA) was found to have a (Al2O3 + Fe2O3) content of 39% of the total weight, a Fe2O3 / (Al2O3 + Fe2O3) content of 31 wt%, a specific gravity of 2.87, a specific surface area of 5,430 cm2 / (100 parts by weight) and silica sol (1 part by weight) having a specific gravity of 2.94 were used as the calcium sulfate-silica sol pulverization powder (CS + SS) (SCS) having an SiO 2 content of 30%, a pH of 10.2, an average particle size of 10 nm, a viscosity (cps, 20 캜) of 24, and a specific gravity (20 캜) of 1.21 were used.
3. 콘크리트 물성3. Concrete properties
콘크리트에 대해 유동성, 압축강도를 시험하였으며 그 결과는 아래 [표 4]와 같다.The concrete was tested for fluidity and compressive strength, and the results are shown in Table 4 below.
위에서와 같이 시멘트와 함께 플라이애시를 결합재로 사용한 콘크리트(비교예1,2)와 플라이애시 대신 석탄경석을 사용한 콘크리트(실시예1,2)를 비교할 때, 압축강도는 초기에 동등하게 발현되다가 14일 이후부터 실시예1,2가 좀더 높게 발현되는 것으로 확인되고, 유동성은 실시예1,2가 비교예1,2보다 다소 떨어지는 것으로 확인된다. 더불어 석탄경석을 사용한 콘크리트(실시예1,2,3)에서 알칼리 자극제를 사용한 콘크리트(실시예3)는 알칼리 자극제를 사용하지 않은 콘크리트(실시예1,2)보다 초기 압축강도가 증진되고 유동성도 개선되는 것으로 확인된다.Compared with the concrete using the fly ash as the binder (Comparative Examples 1 and 2) and the concrete using the coal pumice (Examples 1 and 2) instead of the fly ash as described above, the compressive strength was initially equally expressed It was confirmed that Examples 1 and 2 were more highly expressed and fluidity was found to be somewhat lower in Examples 1 and 2 than Comparative Examples 1 and 2. In addition, in the concrete using the coal pumice (Examples 1, 2 and 3), the concrete using the alkali stimulant (Example 3) showed an improvement in the initial compressive strength and the higher the compressive strength than the concrete without using the alkali stimulant It is confirmed to be improved.
Claims (4)
석탄광산에서 입수하여 준비한 석탄경석 미분말로, 분말도 3,000~4,500㎠/g와 비중 2.3~2.7을 가지고, 60±6중량%의 SiO2와 20±5중량%의 Al2O3를 함유하는 석탄경석 미분말인 것을 특징으로 하는 플라이애시 대체용 시멘트 혼화재.CLAIMS 1. A cement admixture replacing fly ash in a cement admixture with a binder comprising cement and fly ash,
A coal pumice fine powder obtained from a coal mine and having a powder content of 3,000 to 4,500 cm 2 / g and a specific gravity of 2.3 to 2.7, containing 60 ± 6% by weight of SiO 2 and 20 ± 5% by weight of Al 2 O 3 Wherein the cement admixture is a pumice fine powder.
플라이애시 대체용 시멘트 혼화재는 결합재 총량의 1~30중량%로 포함되는 것을 특징으로 하는 석탄경석 미분말을 이용한 콘크리트 조성물.A concrete mixed with a cement admixture for fly ash substitute according to claim 1 and a binder composed of cement,
Wherein the cement admixture for fly ash substitution comprises 1 to 30% by weight of the total amount of the binder.
상기 결합재는, 알칼리 자극제가 결합재 총량의 0.1~3.0중량% 더 포함되는 것을 특징으로 하는 석탄경석 미분말을 이용한 콘크리트 조성물.3. The method of claim 2,
Wherein the binder comprises 0.1 to 3.0% by weight of the total amount of the binder, wherein the alkali stimulant is added to the total amount of the binder.
상기 알칼리 자극제는,
칼슘페리알루미네이트(Calcium Ferri-Aluminate, 4CaO·3(Al2O3, Fe2O3)·SO3) 분말 5~45중량%;
소듐칼슘설페이트(Sodium Calcium Sulfate, Na2Ca(SO4)2) 분말 12~45중량%;
괘상의 칼슘설페이트(Calcium Sulfate, CaSO4)에 실리카졸(Silica sol)이 첨가되어 분쇄된 칼슘설페이트-실리카졸 분쇄분말 25~83중량%;
를 포함하여 구성된 것임을 특징으로 하는 석탄경석 미분말을 이용한 콘크리트 조성물.4. The method of claim 3,
The alkali stimulant may be,
5 to 45% by weight of calcium ferri-aluminate, 4CaO.3 (Al2O3, Fe2O3) SO3) powder;
12 to 45% by weight of sodium calcium sulfate (Na2Ca (SO4) 2) powder;
25 to 83% by weight of pulverized calcium sulfate-silica sol pulverization powder with addition of silica sol to calcium sulfate (CaSO4) in the supernatant;
The concrete composition using the coal pumice fine powder according to claim 1,
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| KR101303195B1 (en) * | 2012-01-27 | 2013-09-03 | 주식회사 인트켐 | Activator for High Volume Slag Cement, High Volume Slag Cement Composition Containing the Activator and Process of the Cement |
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| KR101303195B1 (en) * | 2012-01-27 | 2013-09-03 | 주식회사 인트켐 | Activator for High Volume Slag Cement, High Volume Slag Cement Composition Containing the Activator and Process of the Cement |
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