Haphazard Packing of Unequal Spheres

Haphazard packing of equal and unequal spheres can be performed for the spheres of molecularsieve material with a density of 1.80. The packing of such spheres in air is equivalent to that of nat-ural grains in water. Packing concentrations of equal spheres have been obtained for different pac-king intensities. Unequal spheres can be regarded as equal ones in a wide range of diameter ratios,so far as the packing concentration is concerned. A threshold of diameter ratio exists at 0.70, be-low which the packing concentration is expected to increase. The variation curves of concentrationvs. diameter ratio were established in the experiment. The result will help us to understand the processof sedimentation and the concentration of voids in sedimentary rocks.