Fine aggregate is defined by which sieves?

Fine aggregate is defined as the portion of the aggregate that passes through the larger sieves and is retained on finer sieves. In this context, the correct definition involves materials that pass through a #4 sieve and are primarily retained on the #200 sieve. The #8 sieve is a lower threshold than the #4 sieve and can still include finer materials that would typically be classified within fine aggregate.

The range from the #8 to the #200 sieve includes particles that are small enough to be considered fine aggregate, which typically ranges from the minimum size (about 0.075 mm) up to the point where it begins to be mixed with larger particles. This definition aligns with many standards used in construction and aggregate classifications. Therefore, this range correctly encapsulates the characteristics required to categorize a material as fine aggregate.