| 결합재의 입도분포가 슬래그 시멘트 페이스트의 유동 특성에 미치는 영향 |
| 황해정, 이승헌, 이원준1 |
군산대학교 신소재공학
1기초소재(주) |
| Effect of Particle Size Distribution of Binder on the Rheological Properties of Slag Cement Pastes |
| Hae-Jeong Hwang, Seung-Heun Lee, Won-Jun Lee1 |
Major of Materials Science and Engineering, Kunsan National University
1R&D Center, Basic Materials |
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| ABSTRACT |
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The rheological properties of slag cement pastes by effect of particle size distribution of binder were investigated using a Rheostress 1 rheometer (Haake) with a cylindrical spindle and the relationship between fluidity particle size distribution using the Rosin-Rammler equation. Samples are combined the two types of slag powder and OPC, fine slag particles sized Elaine specific surface area $8,000cm^2/g$, coarse slag particles sized Elaine specific surface area $2,000cm^2/g$, intermediate OPC particles $3,450cm^2/g$, used to search for the combination that would yield the best quality product. The all flow curves which were measured by rheometer showed hysterisis and could be classified into 4 types. When the combination was based on a ratio of 15-20 vol% fine particles, 40-50 vol% intermediate particles, 30-40 vol% coarse particles of the total volume, a high fluidity and low yield-strength was achieved. The Rosin-Rammler function can explain aboved correlation flow curve types. On type 1, the n-value had a correlation with plastic viscosity however the blend of type 2 and 3 showed consistent n-value regardless of plastic viscosity. In addition, the blend in type 4 tended to a rise in fluidity according to the increase of the n-value. |
| Key words:
Rheology, Fluidity, Cement, Blast furnace slag, Particle size distribution |
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