Kelly Ball Apparatus measures the workability of concrete. It is considered to be much simpler and faster than the slump test.
This field test determines the depth to which the apparatus will sink under its own weight into fresh concrete.
It can be used on site or in the laboratory.
It consist of a cylinder with ball-shaped bottom and 14 kg weight
stirrup handle graduated by ¼ inch.
Dimensions: 150 x 330 x 330 mm.
Weight: 16 kg.