A comparison of environmental impacts of hot and warm mix asphalt

Hot-mix asphalt is considered as a reference for common road pavement material used around the world. However, environmental issues at the road pavement scale have only recently been investigated in the international literature through global methods, such as Life Cycle Assessment (LCA) [1] [2]. A few years ago, measurements of energy and airborne emissions were performed by LCPC (French public works research laboratory) during a road testing campaign [3] and have revealed the significant contribution of hot-mix asphalt production to the global environmental loads of roadworks. These results confirmed a few experimental data provided in the literature, with reference to measurements conducted on hot asphalt mixing.