The slump test is used to determine the workability of the fresh concrete.  The workability of the concrete determines the ease of concrete which can be placed or pumped through congested reinforcement.

The slump test should be carried out on a smooth, horizontal, rigid and non-absorbent surface.  The slump cone shall be filled in three approximately equal depth layers and each layer shall be tamped uniformly to its full depth with 25 strokes of the tamping rod.  After filling the slump core to the required depth and levelling the top surface, the cone shall be raised vertically with minimum lateral and torsional movement within 5-10 seconds.  Then the slump shall be measured and recorded to the nearest 5 mm.  The test is only valid if true slump is found which is substantially intact and symmetrical.  If the test sample is in shear or collapses, another sample shall be taken and the procedure shall be repeated.
 

Testing Procedures:
Slump cone was held firmly on a steel plate	Filling Fresh concrete in the slump cone	Levelling the top layer surface by a sawing and rolling motion of the tamping rod	The slump cone was removed by raising vertically with minimum lateral or torsional movement
The slump was measured and recorded to the the nearest 5 mm	A true slump sample

	Slump test procedure in avi format. File size 3.3M.
	Slump test procedure in real player format

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