Validation of Gyratory Mix Design in Iowa: Tech Transfer Summary

In the US, Superior Performing Asphalt Pavement (Superpave) mix design is used in a majority of states. One of the most important factors in mix design is the compaction effort, or number of gyrations, of the asphalt mixture, which is denoted as the design number of gyrations (Ndesign). Ndesign is one of the most significant design considerations/ parameters in the laboratory and is selected based on the corresponding equivalent single-axle load (ESAL) levels for the proposed pavement structure.