The asphalt paving industry is constantly exploring technological improvements that will enhance the material’s performance, increase construction efficiency, conserve resources, and protect the environment. Current and impending regulations on greenhouse gas emissions, fumes/odors and energy conservation are making attractive the reductions in asphalt mix production and placement temperatures. Warm mix asphalt (WMA) refers to asphalt concrete mixtures that are produced at temperatures approximately equal to 100°C – 140°C bellow temperatures typically used in the production of hot mix asphalt (HMA). The goal of WMA is to produce mixtures with similar strength, durability, and performance characteristics as HMA using substantially reduced production temperatures. This paper aims to presents a laboratory study performed on a few Romanian asphalt mixtures manufactured in both technologies (hot and warm). The performances of these asphalt mixtures (WMA) are studied by their characteristics like Marshall flow and stability, stiffness and permanent deformation. All these tests are performed according to European Norms. The results are presented like comparative graphs and the conclusions will establish which is the performance of WMA.

warm mix asphalt; CO2 reduction; bitumen additives; mixture stiffness