Coarse Aggregate

Aggregates retained on 4.75 mm sieve(BIS sieve number 4) are termed as coarse aggregates. They are mainly used in making concrete in batching plant. Coarse aggregates which are used on site are mainly of 10 mm, 20 mm, and 40 mm in size. The acceptance criteria of the various tests of the coarse aggregates to be used is specified in IS 383:1970. The test procedure for the coarse aggregate is specified in IS 2386 (Part I to Part VIII). The tests are repeated after every 45 cu.m of material. The various test conducted on fine aggregates are specified below:
1. Water Absorption
2. Specific Gravity
3. Deleterious Material
4. Gradation
5. Impact Value
6. Crushing Value