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# Test To Check Fineness Of Cement

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FINENESS
So we need to determine the fineness of cement by dry sieving as per IS: 4031 (Part 1) – 1996.The principle of this is that we determine the proportion of cement whose grain size is larger then specified mesh size.

The apparatus used are 90µm IS Sieve, Balance capable of weighing 10g to the nearest 10mg, A nylon or pure bristle brush, preferably with 25 to 40mm, bristle, for cleaning the sieve.
Sieve shown in pic below is not the actual 90µm seive.Its just for reference.

Procedure to determine fineness of cement
i) Weigh approximately 10g of cement to the nearest 0.01g and place it on the sieve.

ii) Agitate the sieve by swirling, planetary and linear movements, until no more fine material passes through it.

iii) Weigh the residue and express its mass as a percentage R1,of the quantity first placed on the sieve to the nearest 0.1 percent.

iv) Gently brush all the fine material off the base of the sieve.

v) Repeat the whole procedure using a fresh 10g sample to obtain R2. Then calculate R as the mean of R1 and R2 as a percentage, expressed to the nearest 0.1 percent. When the results differ by more than 1 percent absolute, carry out a third sieving and calculate the mean of the three values.

Reporting of Results
Report the value of R, to the nearest 0.1 percent, as the residue on the 90µm sieve.

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• B HARIKRISHNA May 19, 2013 at 7:22 am

GOOD

• Mukesh September 20, 2014 at 10:38 pm

what should be the permissible value of R. to check the fineness of cement, as per IS. for cement to be std. or of good quality ?

• Chandra Sekhar March 1, 2015 at 2:37 pm

the cement which passes through 90microns sieve is the good quality of cement

• sahidul islam March 29, 2017 at 12:47 pm

As per IS For a good quality cement, the weight of residue retain on 90micrn sieve should not exceed 10percent

• Naser November 15, 2017 at 12:35 pm

thank you for this information.