The granularity distribution of slag powder and clinker powder was examined by laser granularity analyzing instrument in different specific surface.The characteristics of particle size distribution of slag powder and clinker powder and the effect of particle size distribution of slag powder on particle size distribution of blend cement were investigated by data fitting with Origin software.The results show that all of slag powder
clinker powder and blend cement powder accord with RRSB distribution.Specific surface area S
median particle size D50
characteristic particle size De and De·n of powder have good correlation.The fineness of powder by ball mill can be characterized with specific surface area
D50
De and De·n. The most representative characteristic parameter is De·n.The influence of slag powder distribution on blend cement powder distribution relate to clinker powder distribution.
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