Product Code: EKE 336 Supplied complete as described above, with an electric motor suitable for operation with 220 volts, 50 Hz, single phase, AC Supply. Compaction Factor Compaction factor is the ratio of the weight of partially compacted concrete to the weight of the concrete when fully compacted in the same mould. The weight of partially compacted concrete in relation to its fully compacted state is a reasonably good indication of the workability of concrete.