Effects of particle size distribution, shape and volume fraction of aggregates on the wall effect of concrete via random sequential packing of polydispersed ellipsoidal particles

► Polydispersed ellipsoid random packing structure is simulated for mesostructure of concrete. ► The effect of particle size distribution is studied. ► The effect of particle shape is studied. ► The effect of volume fraction of particle packing is studied. ► The statistical results are verified by the experimental and analytical results.