Test To Check Consistency Of Cement

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CONSISTENCY
The basic aim is to find out the water content required to produce a cement paste of standard consistency as specified by the IS: 4031 (Part 4) – 1988. The principle is that standard consistency of cement is that consistency at which the Vicat plunger penetrates to a point 5-7mm from the bottom of Vicat mould.
Apparatus – Vicat apparatus conforming to IS: 5513 – 1976, Balance, whose permissible variation at a load of 1000g should be +1.0g, Gauging trowel conforming to IS: 10086 – 1982.

vicat_apparatus

Procedure to determine consistency of cement
i) Weigh approximately 400g of cement and mix it with a weighed quantity of water. The time of gauging should be between 3 to 5 minutes.
ii) Fill the Vicat mould with paste and level it with a trowel.
iii) Lower the plunger gently till it touches the cement surface.
iv) Release the plunger allowing it to sink into the paste.
v) Note the reading on the gauge.
vi) Repeat the above procedure taking fresh samples of cement and different quantities of water until the reading on the gauge is 5 to 7mm.

Reporting of Results
Express the amount of water as a percentage of the weight of dry cement to the first place of decimal.

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Comments
  • rokaya April 29, 2012 at 7:07 am

    what is the best water cement ratio for consistency of cement

    • sujit kumar sahoo August 7, 2012 at 4:05 am

      .40 to .6o w/c ratio.

  • Lalithkumar July 1, 2012 at 12:08 pm

    What is the standard consistency limit of cement?

  • mohd.aashik ansari August 3, 2012 at 8:47 am

    its depends on quality of cement.
    however,34% w\c ratio considered to be the best one.!

  • rahul jha October 15, 2012 at 8:09 am

    why 400gm of cement….???

  • T.LAKSHMI PRASAD October 17, 2012 at 12:41 pm

    what is the use of consistency of cement

  • Avinash November 6, 2012 at 9:52 am

    Consistency is the water content required for the 5 to 7 mm penetration of vicat plunger

  • ahmed November 20, 2012 at 9:44 pm

    rahul jha
    why 400gm of cement….???

    it gives the approximate volume of vicat mould used for the test..

  • yogendra May 21, 2013 at 6:29 am

    the depth of punger is same on intial setting time & consistency test but the diff is dia of pungar & % of water

  • rebwar sdiq October 27, 2013 at 8:11 am

    with finer cement particles,wold more or less water be required to achieve the normal consistency ?

  • saad July 22, 2014 at 5:51 am

    when we get the results of the tested samples should we go back to Table 1 C494/CC 494M-08a?? if not which reference should we go back to it after getting the results to know the type of the admixture??

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