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알칼리 활성 슬래그의 열역학적 수화모델링에 대한 황산염의 영향
이효경,박솔뫼,김형기,Lee, Hyo Kyoung,Park, Sol-Moi,Kim, Hyeong-Ki 한국자원리싸이클링학회 2019 資源 리싸이클링 Vol.28 No.1
The present study investigated hydration of alkali activated slag incorporating sulfate as a form of anhydrite by employing thermodynamic modeling using the Gibbs free energy minimization approach. Various parameters were evaluated in the thermodynamic calculations, such as presence of sulfide, precipitation/dissolution of AFt/AFm phase, and the effect of oxic condition on the predicted reaction. The calculations suggested no significant difference in the void volume and chemical shrinkage, which might influence the performance of the mixtures, in spite of various changes of the parameters. Although the types of hydration products and their amount varied according to the input conditions, their variations were smaller range than that induced by water-to-binder ratio. Moreover, it did not affect the amount of C-(N-)A-S-H which was the most important hydration product.