The internal surface of the mould is thoroughly cleaned and freed from superfluous moisture before commencing the test. And if the cone is in completely dry condition then dampen it using a damp cloth.
The mould is then placed on a smooth, horizontally leveled rigid and non-absorbent surface such as a rigid plate. It is held firmly in place during filling by the operator by standing on the two foot pieces provided in the slump cone.
The mould is filled by concrete in four layers, each approximately one-quarter of height of the mould, and each layer is tamped down with 25 strokes of tamping rod with pointed end in a uniform manner.
After tamping the top layer, the concrete is struck off level with a trowel and any mortar leaked out between the mould and base plate is cleaned away.
The mould is then removed from the concrete immediately by raising it slowly and carefully in a vertical direction.