For what properties have aggregates on the department's approved source list been evaluated?

The correct choice is based on the critical properties that ensure the quality and durability of aggregates used in concrete production. Soundness refers to an aggregate's ability to withstand weathering, particularly in freeze-thaw conditions, which can cause significant degradation if not properly evaluated. Abrasion resistance is vital as it measures how well the aggregate can resist wear and tear from mechanical forces, ensuring that the concrete will maintain its integrity under load. The approved source list ensures that only those aggregates meeting these stringent soundness and abrasion criteria are used, as they are essential for the long-term performance of concrete in various infrastructure applications.

The other options focus on properties that, while important in different contexts, do not align with the critical evaluation standards set for aggregate quality under the department's guidelines. Size and texture, weight and shape, as well as color and consistency, are relevant in certain contexts but do not specifically address the durability and performance characteristics that soundness and abrasion target in the context of aggregate evaluation for concrete use.