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Fineness modulus

Fineness Modulus Test for Fine Aggregates for Concrete 49

Fineness Modulus of sand is a number which represents the mean size of the particles in sand. It is calculated by performing sieve analysis with standard sieves (4.75 mm to 150 micron). The cumulative percentage retained on each sieve is added and divided by 100 to gives the value of fineness modulus.