Compaction Factor Apparatus

The Compaction Factor Apparatus is used to assess the workability of fresh concrete, particularly low-workability (low-slump) mixes for which the slump test is less sensitive. The apparatus consists of two conical hoppers mounted above a cylindrical mould; fresh concrete is placed in the upper hopper and allowed to fall successively into the lower hopper and then into the cylinder. The weight of concrete that falls into the cylinder (partially compacted) is compared to the weight of fully compacted concrete filling the same cylinder, giving the compaction factor.

The apparatus is used for determining the workability of fresh concrete, provided the maximum size of the aggregate does not exceed 38mm.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 fitted with hinged trapdoors having a quick release catches. A circular metal plate is provided to cover the top of the cylinder.

Supplied complete with one plaster's trowel and one tamping rod,

16mm dia x 600mm long, both ends rounded.