Question

The fineness modulus of aggregates approximately

• A. is directly proportional to the average size of the particles
• B. is inversely proportional to the average size of the particles
• C. indicates the water absorption of the aggregates
• D. indicates the modulus of elasticity of the aggregates

Answer 1

The correct option is A is directly proportional to the average size of the particles

The fineness modulus of an aggregate is roughly proportional to the average size of particles of the aggregates.
The sum of cumulative percentage of residues retained on each of the Indian Standard sieves, divided by $100$, is known as the Fineness Modulus of the aggregates.
$\cdot$ Fine sand : $2.2-2.6$
$\cdot$ Medium sand : $2.6-2.9$
$\cdot$ Coarse sand : $2.9-3.2$