FINNESS OF CEMENT TEST BY DRY SIEVE METHOD

FINNESS OF CEMENT TEST BY DRY SIEVE

as per IS 4031 Part - 1

1. Scope :

This procedure covers the test method for determining the fineness of cement by dry sieving as represented by the mass of residue left on a standard 90 micron IS Sieve.



2. APPARATUS :

  • Sieve - 90 micron IS Sieve
  • Balance - Balance - The balance shall be accurate to 0.1 percent of the weight of the test sample.
  • Brush - A nylon or pure bristle brush, preferably with 25 to 40 mm bristle, for cleaning the sieve.

3. Test Procedure :

  • Weigh accurately 100gm of cement (Wc) and place it on a 90 micron IS sieve. Break down any air lumps in a sample with fingers without rubbing them on sieve. 
  • Place it on the sieve, being careful to avoid loss. Disperse any agglomerates. Fit the lid over the sieve.
  • Continuously sieve sample by holding the sieve in both hand & Giving wrist motion until no more fine material passes through it.
  • Weight the residue left on the sieve after sieving as (W1).
  • Repeat the procedure for second sample. When the results differ by more than 1 % absolute, carry out a third sieving and calculate the mean of the three values

4. Format:

CEMENT FINENESS TEST BY DRY SIEVE

Determination

Trial-1

Trial-2

Trial-3

AVERAGE

1

Weight of Cement taken (Wc) gm

100

100

100

 

5

2

Weight of cement retained on 90 mic sieve in gm (W1) gm 

5

5

5

3

% of Fineness = W1 / Wc x 100    (%)  

5

5

5

5. Result:

As per IS: The residue should not be more than 10% by weight.

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