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이수석고 함량과 Iron Modulus 변화에 따른 염소 함유 시멘트의 특성에 관한 연구

A Study on the Characteristics of Chlorine-Containg Cement Depending on Changes in Gypsum and Iron Modulus

  • 이영준 (한국세라믹기술원 저탄소.디지털 전환사업단) ;
  • 김남일 (한국세라믹기술원 저탄소.디지털 전환사업단) ;
  • 조정훈 (한국세라믹기술원 저탄소.디지털 전환사업단) ;
  • 서성관 (한국세라믹기술원 저탄소.디지털 전환사업단) ;
  • 추용식 (한국세라믹기술원 저탄소.디지털 전환사업단)
  • Lee, Young-Jun (Low-carbon & DX R&D Division, Korea Institute of Ceramic Eng. & Tech.) ;
  • Kim, Nam-Il (Low-carbon & DX R&D Division, Korea Institute of Ceramic Eng. & Tech.) ;
  • Cho, Jeong-Hoon (Low-carbon & DX R&D Division, Korea Institute of Ceramic Eng. & Tech.) ;
  • Seo, Sung-Kwan (Low-carbon & DX R&D Division, Korea Institute of Ceramic Eng. & Tech.) ;
  • Chu, Yong-Sik (Low-carbon & DX R&D Division, Korea Institute of Ceramic Eng. & Tech.)
  • 투고 : 2022.02.21
  • 심사 : 2022.05.15
  • 발행 : 2022.06.30

초록

본 연구에서는 시멘트 제조공정에서 염소를 함유한 폐자원을 활용하였을 때, 염소가 클링커뿐 아니라 최종 제품에 긍정적인 영향을 끼칠 수 있는 최적의 조건을 제시하고자 염소 함유 시멘트의 물리적 특성을 분석하였다. 동일한 조건의 클링커를 이수석고 중량비 95:5 및 93:7로 분쇄 후 실험을 진행하였다. 또한 클링커 모듈러스를 IM 1.3, 1.5 및 1.7로 제어하여 클링커의 광물학적 특성과 물리적 특성을 동시에 분석하였다. 동일 염소 함량 조건에서 이수석고 함량이 증가할수록 3일 압축강도는 감소하였으나, 장기 압축강도 발현율은 증가하였다. 또한 플로우와 응결시간이 증가하는 것을 확인되었다. IM 감소에 따라 우수한 클링커 광물 특성이 발현되어 free-CaO 함량이 감소하고, alite 및 ferrite 광물이 소폭 증가하였다. 압축강도는 IM이 감소할수록 증가하였으며, IM 1.3의 경우 IM 1.7 대비 약 14%가 상승하였다. 이를 통해 시멘트 제조공정에서 폐자원을 활용하여 자원 절약, 에너지 절감 등의 환경적 측면과 아울러 최종 제품인 시멘트 압축강도 등의 성능 향상에 긍정적인 영향을 미치는 것을 기대할 수 있었다.

The physical properties of chlorine-containing cement were analyzed to optimize the operational conditions when waste resources containing chlorine were used in the cement manufacturing process. Cement with clinker to gypsum weight ratios of 95:5 and 93:7 were manufactured. In addition, the iron modulus (IM) of clinker was set to 1.3, 1.5, and 1.7 to evaluate the burnability and physical properties of clinker. With constant chlorine content, increasing gypsum content resulted in a decrease in the 3 day-compressive strength, whereas the 28 day-compressive strength increased. In addition, flow and setting time also increased with increasing gypsum content. As the IM decreased, burnability was improved, free-CaO content decreased, alite and ferrite content increased, and compressive strength increased In particular, the compressive strength of IM 1.3 was approximately 14% greater than that of IM 1.7.

키워드

참고문헌

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