ABSTRACT
A comprehensive study was conducted to evaluate the laboratory performance of foamed Warm Mix Asphalt (WMA) with regard to permanent deformation, moisture sensitivity (durability), fatigue cracking, and low-temperature (thermal) cracking in comparison to traditional Hot Mix Asphalt (HMA). The laboratory test results revealed comparable resistance to permanent deformation, moisture sensitivity, and fatigue cracking for foamed WMA and HMA mixtures. However, the HMA mixtures had significantly higher ITS values at 14°F (–10°C) and comparable failure strains to the foamed WMA mixtures, which indicates that the traditional HMA mixtures have better resistance to low-temperature (thermal) cracking.
