The mean error was 2.0% at 50 Vol.-%, while it was 0.8% at 75 Vol.-%. The mean
error of the CPM-model without steel fibres according to De Larrard [1999] was 0.77%
for round aggregates and 1.77 % for crushed aggregates. The CPM and approach A3
were applied to predict the packing density of the granular skeleton of SCFRC. The
paste surplus of SCFRC with a maximum aggregate size of 8 or 16 mm was slightly
overestimated and underestimated for mortar mixtures. The prediction of the packing
density of mortars with fibres is less accurate.