A COMPOSITION OF LOW-SHRINKAGE LOW-CARBON GREEN CEMENT COMPRISING CARBON-MINERALIZED FLY ASH AND EARLY STRENGTH EXPANSIVE ADMIXTURE AND CONCRETE APPLIED THEREBY

• Main Authors: KIM, CHUN SIK, PARK, TAE GYU, LEE, HYOUNG WOO, PARK, CHANG HWAN, NAM, SEONG YOUNG, AHN, JI WHAN, YOUN, YONG SANG, JO, SUNG HYUN, SEO, SHIN SEOK
• Format: Patent
• Language: English; Korean
• Published: 06.03.2018
• Subjects: ARTIFICIAL STONE; CEMENTS; CERAMICS; CHEMISTRY; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; LIME, MAGNESIA; METALLURGY; REFRACTORIES; SLAG; TREATMENT OF NATURAL STONE

One embodiment of the present invention provides a green cement composition comprising Portland cement; carbon minerals; an early strength type expansive additive; and a blast furnace slag fine powder. One embodiment of the present invention uses carbon minerals obtained by reacting carbon dioxide, which is a major contributor of greenhouse gases, with fly ash of a cogeneration plant, to further reduce the amount of carbon dioxide as compared to green cement mixed with conventional fly ash and blast furnace slag fine powder, can effectively utilize the fly ash for a cogeneration plant which has been limited in the application as concrete admixture due to high glass lime content, and uses the early strength type expansive additive to reduce the early strength deterioration and drying shrinkage which are problematic in conventional green cement. 본 발명의 일 실시예는 포틀랜드 시멘트; 탄소광물; 조강형 팽창재; 및 고로슬래그 미분말을 포함하여 구성되는, 그린 시멘트 조성물을 제공한다. 본 발명의 일 실시예는 온실가스의 주범인 이산화탄소를 열병합 발전소 비산재와 반응시킨 탄소광물을 활용함으로써, 기존의 비산재나 고로슬래그 미분말을 단순 혼합한 그린 시멘트보다 이산화탄소량을 더 줄이는 효과가 있고, 높은 유리석회 함량 때문에 콘크리트용 혼화재로써의 활용에 제약을 받았던 열병합 발전소 비산재를 효과적으로 활용할 수 있으며, 조강형 팽창재를 사용함으로써 기존 그린 시멘트에서 문제가 되는 조기강도 저하 및 건조수축을 줄이는 효과가 있다.