Solutionizing of additional ions in belite-rich clinkers and the properties of the resulting cement

Abstract

Belite-rich cement (BRC) can be made at lower temperature, but it has unsatisfactory reactivity. The crystal structure of dicalcium silicate (C₂S) was modified by solutionizing some additional irons. By adding barium sulfate (BaSO₄) in the raw meals, the clinkers were easier to be burnt, and the compressive strength of BaSO₄-modified BRC was considerably improved. The distortion of the crystal structure of C₂S was confirmed by the interplanar distance change and nuclear magnetic resonance (NMR) of ²⁹Si in C₂S. An effective way was found to activate C₂S and to broaden the application field of Belite-rich cement.

Keywords

belite cement / solid solubility / additional ions / crystal structure

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