Abstract: In order to explore the relationship between the low-temperature performance and micro characteristics of asphalt, the ductility experiment, bending beam rheological experiment, micro experiment and infrared spectrum experiment were carried out for the base asphalt mixed with Evo and USP warm mix agent respectively. Bases on low temperature experiment data, from the aspect of performance and economy, the low temperature performance of asphalt was the best when the content of Evo and USP was 0.6% and 8% respectively. Two-factor analysis of va-riance shows that aging had a significant effect on ductility. The rheological test of bending beam shows that aging made the low temperature performance of asphalt worse. Through data fitting, it can be seen that the stiffness modulus S and creep rate m were in line relation with time h, and the fitting coefficient can be improved with the addition of warm mixing agent.It can be seen from the microscopic test that the micro morphology and three-dimensional diagram of different asphalt were quite different, and the shape and quantity of bee like structure have also changed after aging. The main reason is that the addition of warm mix agent changed the dispersion degree of asphalt molecules, and aging changed the asphalt components. Infrared spectrum test also shows that the low-temperature performance of aliphatic branched chain index IB, a and aliphatic functional group index IB decrease, and the index of long-chain alkanes increases, which indicates that aging leads to the migration of light components of asphalt to heavy components.However, macroscopically, the ductility decreased, the stiffness modulus S increased, the creep rate m became worse, and the fitting linear relationship was strengthened. In the correlation analysis, the absolute value of correlation coefficient was above 0.87, and the change rule of aliphatic functional group index IB which characterizes the micro-molecular structure of bitumen was positively (negatively) related to the change tendency of its characterization of macro-low temperature properties.
宋云连, 高盼, 吕鹏. 温拌沥青低温性能及其微观特性机理研究[J]. 材料导报, 2021, 35(Z1): 251-257.
SONG Yunlian, GAO Pan, LYU Peng. Study on the Low Temperature Performance and Micro Characteristic Mechanism of Warm Mix Asphalt. Materials Reports, 2021, 35(Z1): 251-257.
1 郝丕琳.北方交通,2015(7), 71. 2 Guo M, Liu H Q, Jiao Y B, et al. Journal of Cleaner Production, DOI:10.1016/j.jclepro.2020.121704. 3 Taqia R, Andrew D, Nicholas T.Construction and Building Materials,DOI:10.1016/j.conbuildmat.2020.118411. 4 Ali M, Ashkan B, Erion H, et al.Construction and Building Materials, DOI:10.1016/j.conbuildmat.2020.118836. 5 李长成,闫洁.公路,2018,63(12), 264. 6 王朝辉,陈姣,侯明业.材料导报:综述篇,2016,30(4),102. 7 高世强.内蒙古东北部高寒草原地区沥青混合料低温抗裂性能试验研究.硕士学位论文,内蒙古大学,2018. 8 董文龙,关维阳,黄卫东.建筑材料学报,2018,21(2),268. 9 宋云连,张扬,吕鹏.复合材料学报,2018,35(8),2140. 10 宋云连,刘恒,丁楠,等.复合材料学报,2018,35(2), 441. 11 张红梅,边开磊,刘圣洁,等.郑州大学学报(工学版),2013,34(1),31. 12 黄小燕,王岚.建筑材料学报,2020,23(6),1450. 13 李超,王岚,冯蕾.功能材料, 2016,47(2),2206. 14 Ji X P, Hou Y Q, Zou H W, et al.Construction and Building Materials,DOI:10.1016/j.conbuildmat.2020.118025. 15 郭书翊.路基工程, 2019(2),32. 16 孙国强,庞琦,孙大权.石油沥青,2016, 30(4),18. 17 李晶,刘宇,张肖宁.硅酸盐通报,2014,33(6),1275. 18 阳恩慧,徐加秋,唐由之,等.吉林大学学报(工学版), 2021,51(2),604. 19 陈锡军. 温拌沥青混合料技术应用研究.硕士学位论文,重庆交通大学,2013. 20 苏加强.山西建筑,2014,40(32),110. 21 陈华鑫,贺孟霜,李媛媛,等.重庆交通大学学报(自然科学版),2013,32(2), 207. 22 杨军,龚明辉,Pauli Troy,等.石油学报(石油加工), 2015, 31(4), 959. 23 Yang J, Gong M H, Wang X T, et al. Journal of Southeast University (English Edition), 2014, 30(3), 353. 24 Dazzi A,Saunier J, Kjoller K,et al. International Journal of Pharmaceutics, 2015,484(1-2), 109. 25 Botjan L,Matja P, Marko P, et al.Polymer Degradation and Stability,2011,96(7), 1271. 26 张勤玲,黄志义.材料导报:研究篇,2020,34(4), 08083.