What are the structural disadvantages of casting a column twice?

Specimen construction: casting of column (note beam bars column casting OHSR – Column 3rd lift casting Page 2 Alum & Lime tank base slab Casting of floor beams Page 3 Columns column casting Pouring concrete into column: Casting column is easy For small quantity of concrete volume we normally depend on machine-mix concrete and for

column casting OHSR – Column 3rd lift casting Page 2 Alum & Lime tank base slab Casting of floor beams Page 3 Columns