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J. Korean Ceram. Soc. > Volume 37(5); 2000 > Article
Journal of the Korean Ceramic Society 2000;37(5): 438.
여러 가지 석고에 따른 Belite-rich Cement 초기 수화의 영향
조현태, 정재현, 황인수, 송종택, 조계홍1
단국대학교 재료공학과
1쌍용양회(주) 중앙연구소
Effects of Various Kinds of Calcium sulfates on the Early Hydration of Belite-rich Cement
This dissertation is focused on the study over the improvement for the early strength of belite-rich cement(BRC). For this purpose, the initial hydration behaviors according to addition of different calcium sulfate types were evaluated. From the observations by XRD, DSC and SEM, the BRC II and III with the addition of natural anhydrate and flue gas desulphurization(FGD) gypsum, respectively, formed much ettringite after 7 days more than the BRC I with the addition of chemical gypsum. The compressive strength of the BRC II and III developed outstandingly due to the formation of calcium aluminate hydrate within pores of hardened BRC paste. Especially, in the case of BRC III adding FGD with low impurities, the early as well as long term compressive strengths were shown very high, compared with other specimens.
Key words: Initial hydration, Belite-rich cement, Calcium sufates, Compress strength, Ettringite
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