| 폐패각-정유폐촉매-배연탈황석고를 사용한 Calcium Sulfoaluminate 클링커의 합성과 특성 |
| 이건호, 송태웅 |
| 경남대학교 신소재공학과 |
| Synthesis and Properties of Calcium Sulfoaluminate Clinker Using Waste Shell, Spent Oil-Refining Catalyst and Desulfurized Gypsum |
| Keon-Ho Lee, Tae-Woong Song |
| Department of Advanced Materials Engineering, Kyungnam University |
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| ABSTRACT |
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For the raw materials of 3CaO$cdot$3Al$_{2}$O$_{3}$ $cdot$CaSO$_{4}$(CSA) clinker manufacturing, the applications of industrial wastes such as waste shell, spent oil-refining catalyst and desulfurized gypsum were examined. The c1inkerbility of the raw mix and the behaviour of formation of clinker minerals were studied and then some hydraulic properties of cements containing the clinker were also investigated. By virtue of the high reactivity of thermally decomposed raw materials, CSA clinkers were obtained at relatively low temperature of 1250$^{circ}C$ and thus oil-refining catalysts were more desirable than aluminium hydroxide as an aluminous raw material. The expansive cement samples showed somewhat lower flow value than that of OPC, but their compressive strengths were developed earlier and higher than that of OPC due to formation of ettringite in the early hydration time, which indicated the possibility of practical use of low-cost CSA clinker using industrial wastes only. |
| Key words:
C4A3S clinker, Industrial wastes, CSA expansive additives |
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