Tribological Approach to Demonstrate Workability of Foamed Warm-Mix Asphalt

Asphalt binder acts as a lubricant film between two aggregates during mixing and compaction. The frictional phenomena in an asphalt–aggregate interaction play an important role in mixing and compaction of warm-mix asphalt (WMA). This study evaluates the frictional behavior of WMA with foamed asphalt through tribological characterization. A ball-on-three-plates apparatus assembled inside a dynamic shear rheometer (DSR) is utilized for...