CEMENT FINENESS TEST PROCEDURE

FINENESS TEST ON CEMENT

FINENESS

AIM  : – To determine the fineness of cement by dry sieving as per IS: 4031 (Part 1) – 1996.

 

PRINCIPLE  :-

The fineness of cement is measured by sieving it through a  standard sieve. The proportion of cement, the grain sizes of which, is larger than the specified mesh size is thus determined.

APPARATUS

Image result for To determine the fineness of cement by dry sieving as per IS: 4031 (Part 1) - 1996.Image result for To determine the fineness of cement by dry sieving as per IS: 4031 (Part 1) - 1996.

 

IS SIEVE

i) 90µm IS Sieve

ii) Balance capable of weighing 10g to the nearest 10mg

iii)   A nylon or pure bristle brush, preferably with 25 to 40mm bristle, for cleaning the sieve

 

PROCEDURE

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.

 

 

TYPES OF COLUMN CASTING CHECK POINTS

RETAINING WALL CONSTRUCT PROCESS AND ITS CHECKING POINTS