[sushil35]

Grading of Aggregates

Grading is the distribution of particles of angular materials among various sizes. Grading is usually expressed in terms of cumulative percentage passing each sieve.

Different standards and specifications specify grading limits for both fine and coarse aggregates. There are several reasons for specifying grading limits and maximum aggregate size, they affect relative:

Relative aggregate proportions
Cement and water requirement
Workability
Pump ability
Economy
Shrinkage and durability of concrete