Journal of the Korean Recycled Construction Resources Institute (한국건설순환자원학회논문집)

Korean Recycled Construction Resources Institute (한국건설순환자원학회)
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Consideration of Cement Mineral Production Amount and Microstructure Chemical Distribution of Cement Clinker Using Coal Ash and Coarse Limestone

석탄재와 조립 석회석을 적용한 시멘트 클링커의 시멘트 광물생성량과 미세구조의 화학성분 분포 고찰

  • Dong-Woo Yoo (Industry University Cooperation Foundation, Kunsan National University) ;
  • Sung-Ku Kwon (Department of Materials Science & Engieering, Kunsan National University) ;
  • Min-Seok Oh (Manufacturing Technology, Sampyo Cement) ;
  • Seok-Je Lee (Manufacturing Technology, Sampyo Cement)
  • 유동우 (군산대학교 산학협력단) ;
  • 권성구 (군산대학교 신소재공학과) ;
  • 오민석 ((주)삼표시멘트 공정개선팀) ;
  • 이석제 ((주)삼표시멘트 공정개선팀)
  • Received : 2023.10.16
  • Accepted : 2023.10.31
  • Published : 2023.12.30
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Abstract

By applying coarse-grained limestone and unprocessed coal ash as sintering raw materials for cement clinker, the microstructure and distribution of chemical components of cement clinker were compared and examined. Samples using coarse limestone as a raw material for cement clinker showed a decrease in sinterability compared to samples using reagent-grade raw materials. Samples using coal ash showed a tendency for some increase in sinterability. In samples using coarse limestone and coal ash, the formation of Belite was high at 1350 ℃. The conversion rate from Belite to Alite was high in the range of 1350~1450 ℃. Samples using coal ash showed stable formation of interstitial phase in the range of 1350 to 1450 ℃. The microstructure and chemical composition distribution of cement clinker sintered at 1350~1450 ℃ showed that all samples showed a form and composition distribution in which the calcium silicate phase and interstitial phase were clearly distinguished.

본 연구에서는 시멘트 클링커의 소성 원료로서 조립의 석회석과 가공하지 않은 석탄재를 적용하여 시멘트 클링커의 미세구조 및 화학성분의 분포를 비교 고찰하였다. 시멘트 클링커의 원료로서 조립의 석회석을 적용한 시료는 시약급 원료를 사용한 시료에 비하여 소성성의 저하가 나타났으며, 석탄재를 적용한 시료에서는 소성성이 일부 증가하는 경향이 나타났다. 조립의 석회석과 석탄재를 적용한 시료에서 1350 ℃에서 Belite의 생성이 높게 나타났으며, 1350~1450 ℃의 구간에서 Belite에서 Alite로의 전환율이 높게 나타났다. 석탄재를 적용한 시료에서 1350~1450 ℃ 구간에서 간극상의 생성이 안정적으로 나타났다. 1350~1450 ℃로 소성된 시멘트 클링커의 미세구조 및 화학성분 분포는 모든 시료가 잘 발달 된 칼슘실리케이트상과 간극상이 명확하게 구분되는 형태 및 성분분포를 나타내었다.

Keywords

Acknowledgement

본 연구는 산업통상자원부 및 산업기술평가원(KEIT)의 연구비 지원으로 수행되었습니다. 이에 감사드립니다.

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