Under the superpave design procedure, what is the maximum level of compaction based on?

The maximum level of compaction in the Superpave design procedure is based on the volumetric properties of the mixture. This involves assessing the mixture’s response to various conditions over a projected lifespan, typically targeted at around 20 years or more. This long-term perspective is crucial to ensure durability and performance.

Under the Superpave system, achieving the right level of compaction is important because it affects the density, permeability, and overall stability of the asphalt mix; thus ensuring it can withstand traffic loads and environmental factors over time. Assessing volumetric properties helps to ensure that the mix retains its intended performance characteristics, which include resistance to deformation and cracking.

Considering the focus on long-term performance allows engineers to make more informed decisions about the design and compaction processes during construction, ultimately enhancing the lifespan and safety of the pavement.