| 고로슬래그 및 플라이 애시 분말을 혼합한 시멘트 페이스트의 유동특성 |
| 송종택, 박효상, 변승호, 유동우 |
| 단국대학교 신소재공학과 |
| Rheological Properties of Cement Paste Blended Blast Furnace Slag or Fly Ash Powder |
| Jong-Taek Song, Hyo-Sang Park, Seung-Ho Byun, Dong-Woo Yoo |
| Department of Materials Science and Engineering, Dankook University |
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| ABSTRACT |
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Rheological properties of cement pastes containing blast furnace slag (BFS: 3,900, $7,910;cm^2/g$) or fly ash powder (FA: 4,120, $8,100;cm^2/g$) according to the ratio of water/binder (W/B) and the dosage of polycarboxylate type superplasticizer (PC) were investigated by a mini slump and a coaxial cylinder viscometer. In this experiment, the ratio of replacing OPC with BFS or FA was 30 wt%, the W/B was from 30 to 70 wt%. As a result, the fluidity of cement paste containing BFS or FA was improved with increasing W/B and the dosage of PC. BFS or FA replaced cement paste with W/B 70% and PC 0.3% showed the highest fluidity. The segregation range of cement paste was occurred below $10;d/cm^2$ of the yield stress and below 50 cPs of the plastic viscosity by the coaxial cylinder viscometer. And also it was formed that the plastic viscosity and the yield stress of FA replaced cement paste were higher than them of BFS replaced cement paste. |
| Key words:
Fly ash, Blast furnace slag, Rheological properties, Yield stress, Plastic viscosity |
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