The microstructure and chemical bonds of β-C₂S under the high energy ball grinding function

Abstract

Using the laser granularity survey technology, X-ray powder diffraction, scanning electron microscopy (SEM) and infrared spectrum analysis methods, we studied the microscopic structure and chemical bonds changes of β-C₂ S monomineral under the high energy ball grinding function. The result indicates that, continuously under the mechanical power, β-C₂ S crystal size would decrease, the micro strain and the effective Beff parameter would increase, and the amorphous phases would be presented. Furthermore, the mechanical power would cause Si-O bond broken and reorganized, the specific surface area would increase, the energy of micro-powder agglomeration vibration would be enhanced and the crystal would be disordered. Finally, β-C₂S was caused to have the mechanochemical change and the activity enhancement.

Keywords

dicalcium silicate / crystal microscopic structure / mechanochemistry

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