Slump Test for Concrete
Ref : IS 1199
Purpose : To find out the workability of fresh concrete
Salient features of apparatus:
Slump Cone:
Top diameter - 100 mm
Bottom diameter - 200 mm
Height - 300 mm
Thickness - 1.6 mm
Tamping rod:
Diameter - 16 mm
Length - 600 mm
Shape - rounded at one end
Test Procedure:
Fill the Slump Cone in four layers
Tamp each layer 25 times with the rounded end of the tamping rod
The tamping should be uniformly distributed and for the second and subsequent layers, tamping rod shall penetrate in to the under lying layers
Strike off the top level of concrete by trowel and tamping rod
Remove the Slump Cone in vertical direction
Measure the difference in level between the height of Slump Cone and that of the highest point of the subsided concrete
The difference in height in mm is recorded as the slump of concrete
