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Journal of the Korean Ceramic Society 1980;17(4): 208. |
| $CaSO_4$ 자극에 의한 고로수쇄 슬래그의 수화반응 |
| 송종택 |
| 금강 중앙연구소 |
| Hydration of Granulated Blast Furnace Slag in the Presence of $CaSO_4$ |
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| ABSTRACT |
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In order to clarify the mechanism of the hydration of supersulphated slag cement, the experiments of suspension hydration were performed in the mixtures of slag+CaSO4+water or NaOH solutions with a liquid/solid ratio of 10. The liquid and solid phase of the suspension was chemically analysed and discussed. In the slag-$CaSO_4$--NaOH system, $Al_2O_3$ was dissolved under high pH condition, and the ettringite was formed by a reaction of $CaSO_4$ and $Al_2O_3$ released in the solution. As hydration progressed, ettringite coated the surface of unhydrated slag grains and inhibited the hydration reaction of slag. $CaSO_4$ was not only an activator for slag hydration, but a reactant in the hydration. |
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