| 불산 무수석고와 플라이 애쉬를 첨가한 시멘트 페이스트의 유동성 및 응결특성 |
| 노재성, 김도수, 홍성수1, 임계규1, 임헌성2 |
충남대학교 공과대학 정밀공업화학과
1호서대학교 공과대학 재료화학공학부
2한국화학연구소 |
| Fluidity and Setting Properties of Cement Paste by Adding of Fluoro Anhydrite and Fly Ash |
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| ABSTRACT |
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Four kids of powder admixtures(A, B, C, D) based on anhydrite were manufactured by mixing at a fixed rate of II-anhydrite, fly ash and active silica as an industrial by-product. Fluidity properties of cement paste such as mini-slump, apparent viscosity with elapsed time, as well as setting time of cement pastes of these admixtures substituted up to 11wt% of cement were compared to those of cement paste(SS) substisuted by marketed high-strength powder admixture(S). Among these powder admixtures, the fluidity of cement pastes(PA, PC) substituted by A and C powder admixtures manufactured from II-anhydrite and fly ash had an excellent property than that of cement paste substituted by marketed powder admixture and also a good fluidity-retention effect with elapsed time by adding of superplasticizer. The setting time of cement paste substituted by powder admixtures based on anhydrite slightly retarded than that of cement paste substituted by marketed powder admixture. |
| Key words:
II-anhydrite, Powder admixture, mini-slump, Apparent viscosity, Fluidity-retention effect, Slump loss |
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