Hydration of High Belite Cement

Abstract

A new type of cement, namely the high-belite cement (HBC) has been made in industrial scale in a trial production in China. The kiln feed raw mix proportions are adjusted so as to produce a clinker with the belite phase proportion as high as 60-70%, and alite phase around 15-20%. HBC produced during the trial production was collected and stored. This paper studied the hydration mechanism and hydration product of the new HBC cement. For comparison purpose, both HBC and ordinary Portland cement (OPC) samples were hydrated for various ages and the cement pastes were analyzedfor theirhydration and hardening mechanism using isothermal calorimetry, TG/DTA and XRD.