Procedure Concrete slump test

the test carried out using metal mould in shape of conical frustum known slump cone or abrams cone, open @ both ends , has attached handles. tool typically has internal diameter of 100 millimetres (3.9 in) @ top , of 200 millimetres (7.9 in) @ bottom height of 305 millimetres (12.0 in).the cone placed on hard non-absorbent surface. cone filled fresh concrete in 3 stages. each time, each layer tamped 25 times 2 ft (600 mm)-long bullet-nosed metal rod measuring 5/8 in (16 mm) in diameter. @ end of third stage, concrete struck off flush top of mould. mould lifted vertically upwards, not disturb concrete cone.

the concrete slumps (subsides). slump of concrete measured measuring distance top of slumped concrete level of top of slump cone.