Which sieves are included in coarse aggregate?

Coarse aggregate is defined by the size of the particles, which typically includes aggregate retained on the #4 sieve or larger. When discussing coarse aggregate, it usually encompasses any material that is too large to pass through a #4 sieve. This means that particles that are classified as coarse aggregate are those that can be retained on sieves that are #4 and above.

The use of a #4 sieve as the dividing line is common in various specifications and standards because it effectively separates finer materials, which are categorized as fine aggregates, from larger, coarse aggregate materials. Therefore, the correct answer reflects the standard definition and classification of coarse aggregates in construction and engineering practices.