Ceramics-Silikáty 41 (4) 125-140 (1997)

HYDRATION OF THE MODEL SULPHOALUMINATE-BELITE CEMENTS COMPOSED OF BLENDS OF MINERALS WITH CLASSIFIED PARTICLE SIZES

  M. T. Palou, J. Majling 

The hydration of clinker mineral mixtures at keeping their constant mineralogical composition (45 wt.% C₂S, 20 wt.% C₄A₃ and 35 wt.% C) but differing in particle size of individual clinker minerals (0-5 mm, 5-20 mm and 20-40 mm) has been studied by conduction calorimetry. The characteristic features of calorimetric curves, namely positions and intensities as well as shapes of peaks are differentiated in relationship to particle size of clinker minerals. Hydration kinetics is mainly governed by C₂S and C (duration of induction period), while C₄A₃ seems to influence predominantly the mechanism of hydration. The "sensitivity ’’ of induction period to the changes in particle size of individual clinker minerals is demonstrated by maps of curves of equal induction periods.

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