Compacting Factor Apparatus

Compacting factor apparatus is used for determining the workability
of concrete, where nominal maximum size of aggregate does not exceed
38mm. The test can be used in laboratory and field. It is more precise and sensitive than slump test apparatus and is useful for concrete mixes of very low workablity. The weight of partially compacted concrete in relation to its fully compacted state varies with its physical characteristics.The apparatus enables a continuous check to be made of the weight of concrete when it falls from fixed heights into a cylindrical container of standard capacity. The weight of concrete in the cylindrical container is known as the weight of partially
compacted concrete and the terms compacting factor is defined as
the ratio of the weight of partially compacted concrete to the weight of the concrete when fully compacted in the same mould.