Characterization of Emulsion Based Warm Mix Binder

The Evotherm warm mix process is the direct substitution of the asphalt binder with a cationic asphalt emulsion. The field trial in Canada demonstrates 30 °C and 60 °C reduction in the mix and compaction temperature, respectively, than the conventional hot mix with the same aggregate and asphalt. This results in 60–80% reduction in CO, NOx and SO2 emission. A procedure of recovering the representative asphalt emulsion residue for the asphalt emulsion based warm mix system was developed. Results of the Superpave binder characterization indicate that the pavement with the 3% SBR latex polymer-modified warm mix after 10–15 years of service would be as flexible as the fresh pavement with the conventional hot mix.