• Title/Summary/Keyword: Cement clinker

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A Study on the Phase Change and Microstructure Change According to the Sintering Temperature of Cement Clinker Applied with Coal Ash (석탄재를 적용한 시멘트 클링커의 소성온도에 따른 상변화 및 미세구조 변화 고찰)

  • Yoo, Dong-Woo;Im, Young-Jin;Choi, Sang-Min;Lee, Chang-Hyun
    • Journal of the Korean Recycled Construction Resources Institute
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    • v.9 no.4
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    • pp.553-560
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    • 2021

  • In this study, cement clinker using a pure sample and clinker using 7% coal ash were sintered at a temperature of 1050~1500℃. Changes in the content of cement minerals and changes in microstructure by sintering temperature were reviewed. The application of coal ash as a raw material for cement clinker was applicable as a source of Al2O3 and SiO2. At a sintering temperature of 1350℃ or higher, the cement clinker applied with coal ash showed the same level of mineral content as compared to the cement clinker applied with pure raw material. The microstructure also showed a similar state, confirming that coal ash can be used as a raw material for cement. In XRD-Reitveld analysis, a maximum amount of Belite was produced at 1250℃. The conversion from Belite to Alite was observed from 1350℃. From 1350℃, the interstitial phase and the mineral phase presumed to be alite were distinguished. It was clearly distinguished from 1400℃. As the sintering temperature increased, the shape and boundary of the crystal phase became clear, and the size of the crystal phase was also increased.

  • https://doi.org/10.14190/JRCR.2021.9.4.553 인용 PDF KSCI