Answer / sandip kulkarni

Fineness modulus = Sum of cumulative retained %age/100
as per IS 383 F.M. is not less than 2 & not more than 3.5

Answer / ajay prasad

Finess modulus = Sum of cumulative % weight retained aggregate/100
It is in between 2.2 to 3.2
You can define it as
2.2-2.6(Finess modulus)= Fine sand
2.6-2.9(Finess Modulus)= Medium Sand
2.9-3.2(Finess modulus)= Coarse Sand

Answer / engr. muhammad arif

Fineness Modulus of sand may be define as sum of

cumulative % age retained on standard sieves (4,8,16,30,50

and 100) divide by 100.

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