TO CARRY OUT SIEVE ANALYSIS OF FINE AGGREGATE SAMPLE AND DETERMINATION OF FINENESS MODULUS

TO CARRY OUT SIEVE ANALYSIS OF FINE AGGREGATE SAMPLE AND DETERMINATION OF FINENESS MODULUS

1.    EQPT/MATERIAL

A set of fine sieves, Weighing balance, sieve shaker, Sample of fine aggregate (500gms) approx, brush for cleaning the sieves.

2.      PROCEDURE

a.  The test is performed on the sample of fine aggregate which has dried. If the moister is present then dry it at temperature not exceeding I10 °C.

b.  Nest the sieve with top lid and bottom pan in appropriate order in a sieve shaker.

c.   Put the Material at the top sieve and shake it for least two minute. If hand shaking is to be resorted then shaking should done with a varied motion backward and forward, left to right circular clock wise or anti-clock wise and with frequent, jarring so that the material moves over the sieve surface in frequent changing directions.

d.  Continue sieving till more material pass through sieve

e.   Weight the material retained on each sieve.    

f.   Tabulate the observation/readings.

3.    PRECAUTIONS

a.  Sieving should be done properly.

b.  Quartering should be done before sieving.

4.      DETAILS OF READINGS/OBSNS/DATA TO BE RECORDED/COLLECTED

a.  Sample No       

b.  Source of supply    

c.   Total weight sample to be sieved

d.  Fineness Modulus is equal to the sum of commutative % retained/100

5. THE PERFORMA/FORMAT FOR THE PREP WITH THE RECORD OF OBSNS, DATA, WITH THE NOTES TO HELP COMPLETION.  

Sieve Size	Wt Retained	% Retained	% Passing	Accumulative % retained	ASTM Spec

5.      INTERPRETATION/COLLECTION OF THE OBSN READINGS, GRAPHS, ETC LEADING TO RESULTS.

      To be done with standard specification of ASTM standard C 136

1.      COMMENTS