Which of the following is a benefit of using aggregates in asphalt mixtures?

Using aggregates in asphalt mixtures significantly contributes to the durability and strength of the pavement. Aggregates provide the necessary structure and stability required for the asphalt to withstand various stresses, such as traffic loads and environmental conditions. The compact and interlocking nature of the aggregates within the mixture helps to enhance the overall mechanical properties, leading to improved resistance against deformation, cracking, and wear over time. This characteristic is crucial because a durable pavement not only extends the lifespan of the road but also reduces maintenance costs and improves safety for users.

In contrast, while increased costs may sometimes occur when selecting high-quality aggregates, this is not a benefit. Aesthetic appeal is generally secondary to functionality, and while certain types of aggregates can enhance appearance, such benefits are not the primary reason for their inclusion. Lastly, while there can be materials that provide some thermal benefits, the primary function of aggregates is not to reduce surface temperatures but rather to lend strength and performance capabilities to the asphalt mixture.