Journal
CEMENT AND CONCRETE RESEARCH
Volume 42, Issue 1, Pages 134-138Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.cemconres.2011.09.001
Keywords
X-ray diffraction; Calorimetry; Hydration; Kinetics; Thermodynamic calculations
Funding
- Florian Deschner
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Heat flow was calculated from XRD data and compared with measured heat flow from calorimetric experiments. It was shown that the heat released during the hydration of a commercial Ordinary Portland Cement can be assigned mainly to three mechanisms, the silicate reaction (sum of dissolution of alite and precipitation of C-S-H-phase and portlandite), the dissolution of C(3)A, and the precipitation of ettringite. The contributions made by anhydrite dissolution and gypsum dissolution to the heat released during hydration turned out to be quite small. It is possible to explain, on the basis of the data produced, the origin of the heat flow curve of the cement used. (C) 2011 Elsevier Ltd. All rights reserved.
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