| 임피던스 측정에 의한 혼합재를 포함한 포틀랜드 시멘트의 수화 |
| 송종택, 김훈상, 배승훈 |
| 단국대학교 재료공학과 |
| Hydration of Portland Cement Containing Blending Components by Impedance Spectroscopy |
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| ABSTRACT |
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In this work, the hydration behaviour of portland cement pastes containing fly ash, blast-furnace slag and silica fume is investigated by Impedance Spectroscopy(IS). As fly ash or blast-furnace slag was added to portland cement, the values of R$_{t(s+1)}$ and R$_{t(s+1)}$ were decreased in the early hydration period. It showed that hydration of cement containing blending components was slower than it of the reference cement paste with the same W/C ratio. However, the cement paste containing silica fume had a large value of R$_{t(s+1)}$ and R$_{t(int)}$due to very rapid pozzolanic reactivity of silica fume in the hydration time. In OPC-fly ash system, a characteristic plateau region appeared between straight-line and semicircle. The plateau region continued to grow in range with the content of fly ash and the hydration time. |
| Key words:
Impedance specroscopy, Hydration behaviour, Fly ash, Blast-furnace slag, Silica fume |
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