To determine the workability of fresh concrete by using a
Vee-Bee consistometer as per IS: 1199 - 1959.
i) A conventional slump test is performed, placing the slump
cone inside the cylindrical part of the consistometer.
ii) The glass disc attached to the swivel arm is turned and
placed on the top of the concrete in the pot.
iii) The electrical vibrator is switched on and a stop-watch is
iv) Vibration is continued till the conical shape of the concrete
disappears and the concrete assumes a cylindrical shape.
v) When the concrete fully assumes a cylindrical shape, the
stop-watch is switched off immediately. The time is noted.
REPORTING OF RESULTS
The consistency of the concrete should be expressed in
VB-degrees, which is equal to the time in seconds, recorded in
Para v), above.