The role of CuO on the microstructure and phase composition of SO3 -activated clinker
Martin Boháč1, Ingrid Khongová1, Anežka Zezulová1
1Department of Physical Chemistry, Research Institute for Building Materials, Hněvkovského 65, Brno, 61700, Czech Republic.
Abstract:
The mineralising effect of CuO on microstructure and phase composition of SO3 -doped clinker was studied by a combination of phase analysis, light and scanning electron microscopy and QXRD. Results show proportionally higher C4 AF content in clinker interstitial matter due to CuO doping. CuO also lowers the SO3 incorporation in main clinker phases C3 S and C2 S. Observation in back-scattered electrons revealed that Cu crystallises mainly as a Cu-rich phase in the clinker interstitial matter and inclusions in crystals of C2 S with distorted structure. CuO partially inhibits the incorporation of Fe2 O3 in C2 S.
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