Abstract
Steel slag blended cement exhibits distinctive exothermic behaviors from cement or fly ash/blast furnace slag blended cement. However, quantitative assessment and prediction are difficult due to the complex interactions between steel slag and cement in time scale, especially at the time when it exceeds the measurement accuracy of isothermal calorimetry. In this study, a quantitative method was proposed to assess and predict the exothermic behavior of steel slag blended cement using both quantitative experiments and kinetic/thermodynamic simulations. Contributions of components in steel slag blended cement to the total exothermic behavior in time scale were quantitatively revealed, and exothermic behavior of steel slag blended cement was interpreted in-depth. Results show that heat release by C3S at 1 d decreases by approximately 40 % in steel slag blended cement. Compared with that on C3S, steel slag has small effects on the exothermic behaviors of other cement clinkers. Calculated results agree well with calorimetric results, and prediction of the exothermic behavior was achieved.
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