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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Применить Всего найдено 7. Отображено 7.
12-03-2025 дата публикации

중조탈황분진을 포함한 다성분계 혼합 시멘트 및 이를 이용한 콘크리트 제품

Номер: KR102780210B1
Автор: 이제신, 홍성인, 정미연, 유병노, 배창오, 최재원, 우지완
Принадлежит: 현대제철 주식회사, 아세아시멘트(주)

... 본 발명은 소량의 중조탈황분진을 이용하여 슬래그 시멘트의 초기 압축강도 저하 문제를 해결하고, 중조탈황분진 적용에 따른 장기강도 저하 문제는 채움재의 추가 혼입으로 해결하며, 20~45℃ 조건의 중고온 양생 시 초기 압축강도가 가장 우수하게 발현되는 다성분계 혼합 시멘트 및 이를 이용한 콘크리트 제품에 관한 것이다. 본 발명은 「포틀랜드시멘트 40~80 중량부; 및 고로슬래그 미분말 20~60 중량부; 를 혼합하여 전체적으로 100 중량부가 되도록 하되, 상기 포틀랜드시멘트 2중량부 이하(0 중량부 제외)를 중조탈황분진으로 대체 혼입시킨 것을 특징으로 하는 다성분계 혼합 시멘트」를 제공한다.

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Номер записи: 1
21-01-2021 дата публикации

Hand rail for silo device with folding function and silo device containing the same

Номер: KR102205714B1
Автор: YEON YEONG HOON, CHA CHU YONG
Принадлежит: ASIA CEMENT CO LTD, ASIA CEMENT CO., LTD.

The present invention relates to a handrail for a silo device with a folding function and a silo device including the same. More specifically, the handrail is installed on an upper portion of a silo device such that a worker can be supported. The handrail for a silo device with a folding function comprises: a main rail unit installed on an upper portion of the silo device; a first side rail unit installed on an upper portion of the silo device to be arranged on one end of the main rail unit; and a second side rail unit installed on an upper portion of the silo device to be arranged on the other end of the main rail. According to the present invention, the handrail for a silo device with a folding function and the silo device including the same construct a handrail of a silo device for storing cement, powder, etc. and withdrawing the cement, the powder, etc. to the outside when needed to use the cement, the powder, etc. in a foldable manner to prevent the handrail from interfering with a ...

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Номер записи: 2
18-07-2018 дата публикации

ENVIRONMENTALLY-FRIENDLY LOW ACTIVE CSA BASED CEMENT TO REPLACE ORDINARY PORTLAND CEMENT (OPC)

Номер: KR101879727B1
Автор: KANG, BONG HEE, KIM, YOUNG GOO, KIM, KI HOON, CHOI, JAE WON
Принадлежит: ASIA CEMENT CO., LTD.

The present invention relates to an environmentally-friendly low active calcium sulfonate aluminate (CSA) based cement to replace ordinary Portland cement (OPC) by using limestone and industrial byproducts. According to the present invention, clinker, which is a semi-finished product of cement, comprises: 20 to 40 weight percent of cubic CSA; 40 to 60 weight percent of high active belite; and 1 to 15 weight percent of ferrite. The environmentally-friendly low active CSA based cement to replace the OPC is manufactured by sintering a raw material comprising a component of CaO, SiO_2, Al_2O_3, Fe_2O_3, SO_3, and MgO at 1,200 to 1,350°C in a rotary furnace for manufacturing Portland cement. The cement clinker uses, as useful raw materials, waste aluminum slag and dust which could not be recycled due to a low Al content and a high MgO content, thereby providing an effect of reducing the usage of limestone more than the OPC and recycling industrial waste as a useful resource. Moreover, a manufacturing ...

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Номер записи: 3
24-05-2018 дата публикации

EFFLORESCENCE REDUCTION TYPE PLASTERING CEMENT COMPOSITION

Номер: KR0101860793B1
Автор: HWANG YIN SEONG, LEE DONG JOO, KI TAE KYOUNG, HWANG DO WON, KOO KYUNG MO, KIM YOUNG GOO, KIM KI HOON
Принадлежит: ASIA CEMENT CO., LTD.

The present invention relates to an efflorescence reduction type plastering cement composition for a plastering work of a building/civil engineering structure and, specifically, to a plastering cement composition reducing efflorescence and improving workability and finishing performance, wherein the plastering cement composition enables a user to immediately work only by pouring water in a construction site since a composite viscosity agent and composite compound are mixed in a combined member including cement. According to the present invention, the efflorescence reduction type plastering cement composition is composed of: 0.2-0.5 wt% of the composite viscosity agent of methyl cellulous and polysaccharide; and 0.3-0.6 wt% of the composite compound of oleic acid group metallic soup salt, in comparison with 100 wt% of the combined member including the cement. A plasticity viscosity is 1,000-2,500 cp under the condition of 60% of a water-combined member ratio at 25°C. An L-value of a Lab ...

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Номер записи: 4
07-01-2021 дата публикации

Shotcrete composition using cement composition for increased durability

Номер: KR102199929B1
Автор: KOO KYUNG MO, CHOI JAE WON, LEE DUK YONG, HWANG BONG CHOON, UM JOO IL
Принадлежит: ASIA CEMENT CO LTD, UNION CORP, ASIA CEMENT CO., LTD., UNION CORPORATION

The present invention relates to a cement composition capable of improving overall penetration resistance, compressive strength and durability, and a shotcrete composition using the same. The present invention provides the cement composition for increasing durability which, in ordinary 100 wt% of Portland cement having a fineness of 3,200 to 3,500 cm^2/g and an SO_3 content of 2.2 to 2.8 wt%, substitutes 15 to 25 wt% of Portland cement with blast furnace slag fine powder, and 5 to 10 wt% of Portland cement with fine limestone powder having a fineness of 6,000 to 9,000 cm^2/g.

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Номер записи: 5
07-01-2021 дата публикации

High performance mortar composition for large area panels

Номер: KR102199937B1
Автор: KOO KYUNG MO, JEOMG IL DONG, JEONG EUN JU, JEOMG. IL DONG
Принадлежит: ASIA CEMENT CO LTD, HANPHIL ENG, ASIA CEMENT CO., LTD.

The present invention relates to a high-performance mortar composition for large area panels to prevent cracking, twisting, and warping without being mixed with steel fibers. According to the present invention, the high-performance mortar composition comprises: 100 parts by weight of a binder including 75 to 85 wt% of concrete having a fineness of 5,000 to 5,500 cm^2/g and 15 to 25 wt% of fine blast furnace slag powder having a fineness of 4,500 to 6,000 cm^2/g; 3 to 5 parts by weight of an intumescent compound containing 60 to 80 wt% of CaO and CaSO_4; 1,200 to 1,500 parts by weight of fine aggregate including 30 to 50 vol% of particles having a diameter of 2.5 to 5.0 mm and 50 to 70 vol% of particles having a diameter of 2.5 mm or less; and 150 to 170 parts by weight of mixing water. Accordingly, a high strength with a mortar flow of 700 mm or more and a compressive strength of 80 MPa or more at one-day aging is provided and properties of shrinkage deformation less than 700×10^-6 m/m ...

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Номер записи: 6
11-04-2016 дата публикации

Cement for high strength concrete binder and manufacturing process thereof

Номер: KR0101610188B1
Автор: 이훈희, 이병기, 유병노, 황인성, 최재원, 김시리, 황도원, 연영훈, 김상준, 이회근, 이승훈, 손유신, 정재홍, 이우진
Принадлежит: 아세아시멘트(주), 삼성물산 주식회사

... 본 발명은 미분 혼화재와 혼합하여 초고강도 콘크리트 결합재로 사용하기 위한 시멘트에 관한 것으로, 더욱 상세하게는 초고강도 콘크리트의 초고강도 발현에 유리하게 역할하는 새로운 규격의 시멘트와 이러한 품질규격의 시멘트를 경제적으로 바람직하게 제조하기 위한 방법에 관한 것이다.본 발명에 따른 초고강도 콘크리트 결합재용 시멘트는, 미분 혼화재와 혼합하여 초고강도 콘크리트 결합재로 사용하기 위한 시멘트로서, 분말도가 2,300~2,800㎠/g이되, 44㎛ 규격의 체를 통과하고 남은 잔사가 20~40중량%이거나 100㎛ 이상 규격의 체를 통과하고 남은 잔사가 5~15중량%이거나 입도분포계수(n)가 Rosin Rammler 분포식 기준으로 0.8~1.2인 것을 특징으로 한다.본 발명에 따른 초고강도 콘크리트 결합재용 시멘트의 제조방법은, 보통 포틀랜드 시멘트를 제조하는 공정에서 분쇄과정을, 분쇄설비의 Separator rpm을 1종 보통 포틀랜드 시멘트 제조하는 경우의 65~95% 수준이나 550~650rpm으로 설정하면서 실시하는 것을 특징으로 한다. 여기서 분쇄과정은, 분쇄설비의 출구 압력을 보통 포틀랜드 시멘트 제조하는 경우의 105~115% 수준이나 600~800mmH2O로 더 설정하면서 실시할 수 있다.

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Номер записи: 7