| 고강도용 폴리카르본산계 고성능 감수제가 사용된 콘크리트의 성능 |
| 이완조, 강성구, 황인동1, 이재용2, 박성, 정윤중 |
명지대학교 세라믹공학과
1세일콘(주) 부설연구소
2금성개발(주) |
| The Performance of Concrete Used High Strength Development Polycarboxylate Superplasticizer |
| Wan-Jo Lee, Sung-Gu Kang, In-Dong Hwang1, Jae-Yong Lee2, Sung Park, Yun-Joong Chug |
Department of Ceramic Engineering, Myong Ji University
1Seil Con R&D Center
2Cum Sung Development Co. LTD. |
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| ABSTRACT |
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There are many kinds of polycarboxylate superplasticizer as a functional classification which are introduced to domestic; Water Reducer, Retention, Ultra High Strength Superplasicizer. These are showed different physical behaviors because of the difference in the chemical system and the manners after cement mixing. In the case of water reducer, when $1.2% of cement weight used, water reducing which is over $30% is observed, but it take with segregation and the reduction of slump flow shows over 30 cm after 45 min of concrete produce. In the case of retention, when the same quantity used, water reducing which is about $25% is observed and slump flow which is up to 45 min shows under 15 cm. And in the case of ultra high strength, when $1.2% of cement weight used, water reducing which is over $30% is observed, and slump flow which is up to 45 min recorded fewer than 15 cm. Compressive strength of ultra high strength superplasticizer has take effect of early age strength, and in the condition of specific mixing, 18 h-compressive strength is insured for more than $60;Kgf/cm^2$ and 24 h-compressive strength is insured for more than $80;Kgf/cm^2$. |
| Key words:
Polycarboxylate superplasticizer, Ultra high strength concrete |
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