What are the three different sizes of aggregate?

The identification of aggregate sizes is crucial in construction and engineering projects, and the correct classification includes fine, medium, and coarse aggregates. Fine aggregate typically consists of particles smaller than 4.75 mm, primarily sand, which helps fill spaces between coarser particles in concrete and enhances its workability. Medium aggregates refer to those that fall between fine and coarse, generally including stones and gravel that provide structural support. Coarse aggregates are larger, comprising particles that exceed 4.75 mm and are essential for providing the bulk and strength to concrete mixes.

This classification into fine, medium, and coarse sizes allows builders and engineers to select the appropriate type of aggregate for their specific application, ensuring the integrity and durability of the construction materials used. The other options do not reflect the standard terminology used in construction for categorizing aggregate sizes.