The role of CuO on the microstructure and phase composition of SO₃‐activated clinker

Abstract

The mineralising effect of CuO on microstructure and phase composition of SO 3doped clinker was studied by a combination of phase analysis, light and scanning electron microscopy and QXRD. Results show proportionally higher C 4 AF content in clinker interstitial matter due to CuO doping. CuO also lowers the SO 3 incorporation in main clinker phases C 3 S and C 2 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 C 2 S with distorted structure. CuO partially inhibits the incorporation of Fe 2 O 3 in C 2 S.

Early hydration of C4AF with silica fume and its role on katoite composition

“…One of the current areas of cement research is lowenergy cements activated by various dopants or combinations of dopants. [10][11][12][13][14][15] The content and reactivity of C 4 AF changes significantly due to fluxes and mineralisers. A deeper understanding of the mobility of individual ions and compounds is needed to support recent knowledge of mechanisms of C 4 AF hydration.…”

“…One of the current areas of cement research is low‐energy cements activated by various dopants or combinations of dopants 10–15 . The content and reactivity of C 4 AF changes significantly due to fluxes and mineralisers.…”