Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Manufacture of Ordinary Portland Cement Clinker Using Cement Paste of the Waste Concrete

폐콘크리트로부터 회수된 시멘트 페이스트 미분말의 시멘트 원료화 연구

  • Ahn, Ji-Whan (Minerals and Materials Processing Division, Korean Institute of Geoscience and Mineral Resources) ;
  • Kim, Hyung-Seok (Minerals and Materials Processing Division, Korean Institute of Geoscience and Mineral Resources) ;
  • Cho, Jin-,Sang (Minerals and Materials Processing Division, Korean Institute of Geoscience and Mineral Resources) ;
  • Han, Gi-Chun (Minerals and Materials Processing Division, Korean Institute of Geoscience and Mineral Resources) ;
  • Han, Ki-Suk (Minerals and Materials Processing Division, Korean Institute of Geoscience and Mineral Resources) ;
  • Kim, Hwan (School of Material Science and Engineering, Seoul National University)
  • 안지환 (한국지질자원연구원 자원활용소재연구부) ;
  • 김형석 (한국지질자원연구원 자원활용소재연구부) ;
  • 조진상 (한국지질자원연구원 자원활용소재연구부) ;
  • 한기천 (한국지질자원연구원 자원활용소재연구부) ;
  • 한기석 (한국지질자원연구원 자원활용소재연구부) ;
  • 김환 (서울대학교 재료공학부)
  • Published : 2003.08.01
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Abstract

The fine powder produced by heating and grinding of the waste concrete in the waste construction was investigated whether utilize as substitution raw material of SiO$_2$, CaO, and Al$_2$O$_3$ source for OPC clinker manufacture is possible or not. In order to synthesize OPC clinker, limestone, shale, converter slag and fly ash were used as main raw materials, and modulus was fixed LSF 91.0, SM 2.60, IM 1.60. The synthesized clinkers were characterized. The Main products of synthesized clinker were C$_3$S, ${\beta}$-C$_2$S, C$_3$A, C$_4$AF as OPC clinker at 1,43$^{\circ}C$. As a result of TG-DTA and burnability index(B.U) analysis of each raw mixtures, the formation temperature of clinker phases was similar and B.I was showed easy burning as 48.6∼51.4.

건설폐기물 중 폐콘크리트를 40$0^{\circ}C$로 가열한 후 ball mill로 분쇄하여 재생골재를 생산할 때 발생된 미분말을 보통 포틀랜드 시멘트의 SiO$_2$, CaO, A1$_2$O$_3$원에 대한 대체원료물질로서 활용하고자 하였다. 클링커를 제조하기 위한 주원료는 석회석, shale, 전로슬래그, fly ash를 이용하였고, modulus는 LSF:91.0, SM:2.60, IM:1.60로 고정한 후 shale에 대해 미분말을 25, 50, 15, 100%까지 치환하여 클링커를 제조하였다. 클링커의 주요생성광물은 1,45$0^{\circ}C$에서 OPC와 같은 광물상인 $C_3$S, $\beta$-C$_2$S, $C_3$A, $C_4$AF 상으로 나타났다. 조합원료의 반응성을 비교하기 위해 시차열분석을 실시하고, 소성성지수를 구한 결과, 클링커의 광물상 생성온도는 plain과 유사했으며, 소성성지수는 48.6-51.4 정도로 나타났다.

Keywords

References

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