抄録
Cement powders was treated with a high-velocity pneumatic double-stage impactor and the process of becoming globular was quantitatively analyzed by using a shape factor in order to obtain the optimum operation condition of the impactor. The powders used were not only the one-component but also mufti-component ones, and the effect of constituent minerals on the modifying mechanism of the cement particles was investigated. The relationship between the fluctuating characteristics, including the shape change of treated powders, and the operation conditions was examined on the assumption that the coalescence and break-down of cement particles takes place competitively under a high-velocity pneumatic impact.
