Belite-rich cement (BRC) can be made at lower temperature, but it has unsatisfactory reactivity. The crystal structure of dicalcium silicate (C 2 S) was modified by solutionizing some additional irons. By adding barium sulfate (BaSO 4 ) in the raw meals, the clinkers were easier to be burnt, and the compressive strength of BaSO 4 -modified BRC was considerably improved. The distortion of the crystal structure of C 2 S was confirmed by the interplanar distance change and nuclear magnetic resonance (NMR) of 29 Si in C 2 S. An effective way was found to activate C 2 S and to broaden the application field of Belite-rich cement.
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