Question

If fineness modulus of aggregate is $4.1$ then it is

• A. Fine sand
• B. Coarse sand
• C. All in aggregate
• D. Coarse aggregate

Answer 1

The correct option is C All in aggregate

Fineness modulus: It is a numerical index of fineness, giving some idea about the mean size of the particles in the aggregates. The fineness modulus $(F.M.)$ varies between $2.0$ to $3.5$ for fine aggregate, between $5.5$ to $8.0$ for coarse aggregates, and from $3.5$ to $6.5$ for all-in-aggregates.
So the value $4.1$ occurs in all-in-aggregate.