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

CAF is considered the least reactive main clinker phase, but its reactivity may be affected by adding supplementary cementitious materials (SCMs). Pure CAF was synthesised in a laboratory furnace, and the role of silica fume without gypsum on its early hydration properties was monitored. Burning was carried out in four stages to achieve 99% purity of CAF.

The role of CuO on the microstructure and phase composition of SO -activated clinker.

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