COMPACTION FACTOR APPARATUS

STANDARD: BS 1881-103, BS 5075

The  apparatus  is  used  for  determining  the  workability  of fresh concrete, provided the maximum size of the aggregate does not  exceed  38 mm.  The  test is particularly useful  for concrete  mixes  of  very  low  workability  where  true  slump values are not reliable.
It  consists  of  two  rigid  conical  hoppers  and  a  cylinder mounted  on  a  rigid  metal  frame.  The  lower  openings  of the hoppers  are  fi tted  with hinged  trap-doors having  quick release catches. A circular metal plate is provided to cover the top of the cylinder.