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J. Korean Ceram. Soc. > Volume 35(6); 1998 > Article
Journal of the Korean Ceramic Society 1998;35(6): 583.
CSA계 혼합 시멘트 수화에 미치는 Boric Acid 의 영향
유광석, 이경희, 김남호1, 이양수1, 안광훈, 이재원2, 임굉3
명지공과대학 무기재료공학과
2명지공과대학 무기재료공학
3배재대학교 공과대학 신소재공학부
Effects of H$_2$BO$_3$ on the Hydration of $C_4$A$_3$S Blended Rapid Hardign Cement
The study was carried on the influence of {{{{ { {H }_{3 }BO }_{3 } }} for hydration of blended rapid hardening cement which was composed of {{{{ {{C }`_{4 } ^{ }A }_{3 } }} Adding {{{{ { {H }_{3 }BO }_{3 } }} to the mortar of blended rapid hardening cement delayed the setting time and increased the flow of the mortar. When {{{{ { {H }_{3 }BO }_{3 } }} added to the blended rapid hardening cement mono-sulfate was produced rather than ettringite and the existing time of monosulfate also prolonged. After hours monosulfate was converted to ettringite through being producted like gels. This monosulfate phase in-fluences on the setting time and flow of fresh mortar,
Key words: C$_4$A$_3$H$_2$BO$_3$ Retarder, Monosulfate, Ettringite, Rapid harding, Blended cement
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