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Title |
Analysis of Influence Factors for the Pozzolanic Activity and Material Characteristic of the Calcined Paper Sludge
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Authors |
소형석(Hyoung-Seok So) ; 강재홍(Je-Hong Kang) ; 임용택(Yong-Taek Lim) ; 장홍석(Hong-Seok Jang) ; 소승영(Seung-Young So) |
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DOI |
https://doi.org/10.4334/JKCI.2018.30.1.059 |
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Keywords |
소성제지슬러지 ; 소성조건 ; 냉각조건 ; 포졸란 활성 ; 재료적 특성 calcined paper sludge ; calcination condition ; cooling method ; pozolanic activity ; material characteristic |
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Abstract |
The purpose of this study is to investigate the influencing factors for pozzolanic activity and material characteristics of calcined paper sludge. Calcined paper sludge (CPS) was produced by various parameters such as temperature and time of calcination, cooling methods, basicity and fineness, and its chemical and mineral characteristics were investigated using X-ray fluorescence (XRF) and X-ray diffraction (XRD) analyses. The pozzolanic activity of the CPS was also investigated by using an API (assessed pozzolanic activity index) test. From the results of XRD, new phases such as anorthite and gehlenite by crystallization of CAS appeared at CPS above 800 °C. These new phases have higher chemical and thermal stability than calcite or kaolinite. This may have a negative effect on the pozzolanic activity of CPS. The results of the API (%) test clearly showed that the pozzolanic activity of CPS was highest at a calcination temperature of 700 °C, a calcination time of 2 hours and the cooling method of water quenching.
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