A study on volumetric versus surface properties of wearing courses

The main purpose of this study was to analyze the volumetric and surface characteristics of hot mix asphalt (HMA) specimens as a function of compaction process. Specimens were produced in the laboratory by two different compaction devices, a gyratory compactor and a roller compactor. The volumetric and surface characteristics (air void content, bulk specific gravity) of these specimens, as well as the relationships among surface texture, volumetrics and compaction, were investigated. Analysis of these results may allow determinations of how material movements under compaction determine volumetrics distribution and variations and surface properties. A tentative theoretical framework for synergistically pursuing texture and volumetric targets was formulated. Outcomes of this study are expected to benefit both practitioners and researchers.