COORDINATION-NUMBER OF BINARY-MIXTURES OF SPHERES

This paper presents an experimental study of the coordination number o f binary packings by the use of the liquid bridge technique and provid es detailed information about the distributed coordination numbers cor responding to different types of contacts between small and large comp onents and their dependence on particle size distribution. The results indicate that increasing the volume fraction of small component incre ases the small-to-small and large-to-small contacts and decreases the small-to-large and large-to-large contacts; and this trend is more app arent for a packing with a large size difference. For the packings und er gravity, the overall mean coordination number is essentially a cons tant and independent of particle size distribution.