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Title |
A Study on the Possibility of Using Cement Raw Material through Chemical Composition Analysis of Pond Ash
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Authors |
이재승(Jae-Seung Lee) ; 노상균(Sang-Kyun Noh) ; 서정일(Jung-Il Suh) ; 신홍철(Hong-Chul Shin) |
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DOI |
https://doi.org/10.11112/jksmi.2020.24.6.180 |
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Keywords |
시멘트 원료; 화학성분 분석; 매립회; 염화물; 미연탄소 cement raw material; chemical composition analysis; pond ash; chloride; unburned-carbon |
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Abstract |
To replace Japanese coal ash used in the domestic cement production and to recycle large quantities of domestic pond ash, it is essential to develop the technologies for quality control of cement by using the domestic pond ash. Thus, in this study, the feasibility of using the pond ash as a raw material for cement was investigated through chemical composition and microstructure analysis. As a result, most of the domestic pond ash contained slightly more Fe2O3, chloride, and unburned carbon contents than Japanese coal ash. In particular, the contents of chloride were considerably low in the pond ash that was transferred to fresh water or collected from surface of landfill area. However, since circulating fluidized bed boiler coal ash had relatively high SO3 contents causing durability problems of cement, it was not suitable for use as a raw material for cement. Thus, to replace Japanese coal ash with the domestic pond ash, it is necessary to introduce the adjustment of mixture proportion of cement raw materials and the process of removing chloride in the pond ash.
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