What is not a consideration when determining the size of coarse aggregate?

When determining the size of coarse aggregate used in concrete construction, several factors are essential to ensure structural integrity and performance. The spacing between rebar is a crucial consideration because the aggregate must be sized appropriately to maintain the necessary spacing for reinforcement while allowing for adequate workability. The monumental clear depth of concrete is also significant as it affects how the aggregate will perform in deeper placements and ensures that the concrete can adequately encapsulate the aggregate and rebar, preventing issues like segregation.

The minimum cross-section of the member being constructed is another relevant factor, as it impacts not only the overall strength and durability but also how well the larger aggregate can work within that space without compromising the mix.

In contrast, environmental impact is generally not a direct consideration when selecting the size of coarse aggregate. While sustainability and environmental assessments are important in construction practices, they do not specifically influence the technical requirements for aggregate sizing, which is mainly focused on structural and material compatibility concerns. Thus, this option stands out as not being a key factor in deciding the size of coarse aggregate.