The Synthesis and Characterization of Novel Bis-cationic Asphalt Emulsifier Xiao-Meng Yu, Lai-Shun Shi, Cun-Fei Ma, Lu Hou, Jing-Wen Kong and Ya-Li Sun MATEC Web Conf., 130 (2017) 04004 Published online: 25 October 2017 DOI: 10.1051/matecconf/201713004004