[Sustainable Civil Infrastructures] Solving Pavement and Construction Materials Problems with Innovative and Cutting-edge Technologies (Proceedings of the 5th GeoChina International Conference 2018 – Civil Infrastructures Confronting Severe Weathers and Climate Changes: From Failure to Sustainability, held on July 23 to 25, 2018 in HangZhou, China) || Feasibility of Using XRF for Assessment of Surface Free Energy Components of Asphalt Binder