Abstract:To study the effect of carboxyl group on the performance of amphoteric asphalt emulsifier and emulsified asphalt prepared from amphoteric asphalt emulsifier, three different asphalt emulsifiers were synthesized by using oleic acid, different molar ratio of diethylene triamine and chloroacetic acid, and their performances were characterized by infrared spectroscopy, surface activity and hydrophilic-lipophilic balance (HLB) value. The performances of emulsified asphalt prepared by different emulsifiers were tested. The research results show that: with the increase of carboxyl group in molecular structure of emulsifier, the surface tension of emulsifier at the critical micelle concentration (CMC) is increased from 37.42 mN/m to 40.24 mN/m and 43.98 mN/m; HLB value is increased from 8.1 to 11.1 and 13.9, which means that the water solubility becomes better; the demulsification rate of emulsified asphalt is from middle fission to fast cracking and then to slow cracking; the penetration at 25 ℃ of emulsified asphalt evaporation residue gradually decreases from 8.0 mm to 7.9 mm and 7.6 mm; the softening point successively increases from 47.0 ℃ to 47.5 ℃ and 48.5 ℃, and the hardness of asphalt increases.
高莉宁,符小红,贾秦龙,何锐,陈华鑫. 羧基对两性沥青乳化剂及乳化沥青性能影响研究[J]. 重庆交通大学学报(自然科学版), 2020, 39(11): 81-85.
GAO Lining, FU Xiaohong, JIA Qinlong, HE Rui, CHEN Huaxin. Effects of Carboxyl Group on Performance of Amphoteric Asphalt
Emulsifier and Emulsified Asphalt. Journal of Chongqing Jiaotong University(Natural Science), 2020, 39(11): 81-85.
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