The water-powder ratio was measured by means of modified vicat apparatus. Its an ISO standard of measuring the setting time.
This time more often than not determined by one kind of penetration test and based on the ADA specification #25, this was determined with standard Vicat apparatus.22
Standard consistence, and initial and final setting time tests on the PC, PFA-PC, MK-PC and MK-PFA-PC pastes were carried out using a Vicat apparatus in accordance with BS EN 196-3 (British Standards Institute 1995b).
The standard consistence was that recorded for the test in which the plunger of the Vicat apparatus penetrated the paste to a depth of thirty-four mm (i.e.
The principle is that standard consistency of cement is that consistency at which the Vicat plunger penetrates to a point 5-7 mm from the bottom of Vicat apparatus, conforming to IS: 5513-1976.
How to calculate the initial and final setting time as per IS: 4031 (Part 5)-1988 by Vicat apparatus conforming to iS: 5513-1976?