To Determine Crushing Strength of given Aggregate- Concrete Practical

Aggregate is a granular material, such as sand, gravel, crushed stone, crushed hydraulic-cement concrete, or iron blast-furnace slag, used with a hydraulic cementing medium to produce either concrete or mortar.

Coarse Aggregate
Those particles that are predominantly retained on the 4.75 mm (No. 4) sieve, are called Coarse Aggregates.
Fine Aggregate
Those particles passing the 9.5 mm (3/8 in.) sieve, almost entirely passing the 4.75 mm (No. 4) sieve, and predominantly retained on the 75 µm (No. 200) sieve are called fine aggregate.