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Journal of the Korean Ceramic Society 2000;37(4): 388. |
| 칼슘설포알루미네이트계 팽창재의 제조 및 기초 물성 |
| 전준영, 송종택1 |
현대시멘트 연구개발과
1단국대학교 재료공학과 |
| Synthesis and Properties of Calcium Sulfoaluminate Type Expansive |
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| ABSTRACT |
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The C4A3S clinker was prepared by the solid-state reaction. The mixture of raw materials; calcite, kaoline and gypsum, was fired at 135$0^{circ}C$ for 1hr and cooled rapidly in air. C4A3S type expansive was made with C4A3S clinker, CaO and CaSO4. The cement replaced by 10 wt.% C4A3S type expansive was investigated by the measurement of the strength(compressive, tensile, flexural) and length change at various curing conditions. Hydration products were mainly ettringite, monosulfate and Ca(OH)2. The densification and the expansion due to the formation of ettringite during the hydration increased strength and reduced the drying shrinkage of hardened cement. |
| Key words:
${C_4}{A_3}S$, Ettringite, Monosulfate, $Ca(OH)_2$, Expansion |
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