고순도 C₃A 합성 방법 및 CaCO₃가 C₃A 초기 수화 반응에 미치는 영향
High purity C₃A synthesis method and effect of CaCO₃ on C₃A initial hydration reaction
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초록
본 연구에서는 고순도 C₃A 합성을 위해 다양한 실험 변수를 설정한 뒤 그에 따른 영향 인자를 확인하였다. 실험 결과 고순도 C₃A 합성을 위해서는 소성 온도가 가장 중요한 인자라고 판단되었으며 , 합성량이 증가할 경우 소성 시간을 증가시켜야 한다고 판단되었다. 또한, 탄산칼슘이 C₃A의 초기 수화 반응에 미치는 영향을 확인한 결과 일반 시멘트와는 다르게 초기 반응 생성물로 모노카보알루미네이트가 생성되었으며, 수화 24시간 경과 후 모노카보알루미네이트가 헤미카 보알루미네이트로 변환되는 것이 확인되었다. 또한, 탄산칼슘 함량에 따라 모노카보알루미네이트가 생성되는 양이나 속도가 상이한 것을 확인하였다.
Abstract
In this study, various experimental parameters were investigated for high-purity C₃A synthesis. As a results of experiment, it was verified that the calcined temperature was the most important parameter for the synthesis of high-purity C₃A. In addition, more synthesis time was needed when large amount of C₃A synthesis to achieve high-purity. Meanwhile, the C₃A blended with CaCO₃ showed different reaction products compared to normal cement because C15 and C30 had monocarbocaluminate as a reaction product at early stage of hydration. Furthermore, the production amount and formation rate of monocarboaluminate formation was different varying with the CaCO₃ amounts.
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