Tim McCaffrey, a materials engineer technician, and Thomas Carr, a civil engineering technician, both with the U.S. Army Engineer Research and Development Center’s Geotechnical and Structures Laboratory, remove induction hot mix asphalt (iHMA) material containing steel particles from the induction unit capable of heating the asphalt to 300 degrees in under five minutes. The iHMA composition received a U.S. patent in March 2021.