In order to indicate the direction for the rejuvenator development, the aging and regenerating process of asphalt were analyzed from the rheological and chemical view. The Dynamic Shear Rheological (DSR) tests and Fourier Transform Infrared Spectroscopy (FTIR) tests were conducted on the asphalt samples. The complex shear modulus, creep recovery rate (R), unrecoverable creep flexibility (Jnr), G-R parameters and aging functional group index of the original asphalt, aged asphalt and asphalt modified by extraction oil were measured. The results show that: the complex shear modulus and the permanent deformation resistance of asphalt increase after aging, but the fatigue resistance of asphalt at medium temperature decreases; the high temperature property of the asphalt will be weakened and the fatigue resistance will be enhanced after adding the extraction oil; a lot of carbonyl and sulfoxide functional groups will be generated during asphalt aging, the extraction oil can reduce the carbonyl index of the short-term aging asphalt and the long-term aging asphalt by 48.6% and 32.6% respectively, and the sulfoxide index of the asphalt will be reduced by 4.3% and 32.7%. It proved that the extraction oil can restore the medium-temperature fatigue property of aged asphalt and reduce the concentration of chemical functional groups related to aging, thus having a regenerative effect.
郭猛，刘海清，李亚非，王真
. Rheological and Chemical Characteristics of Asphalt During Aging and Regenerating[J]. Transport Research, 2020
, 6(5)
: 21
-27
.
DOI: 10.16503/j.cnki.2095-9931.2020.05.003
[1]Baghaee Moghaddam T, Baaj H. The Use of Rejuvenating Agents in Production of Recycled Hot Mix Asphalt: A Systematic Review[J]. Construction and Building Materials, 2016, 114: 805-816.
[2]Liu G Q, Yang T, Li J, et al. Effects of Aging on Rheological Properties of Asphalt Materials and Asphalt-filler Interaction Ability[J]. Construction and Building Materials, 2018, 168: 501-511.
[3]王佳妮. 模拟紫外环境下沥青老化流变行为的研究[J]. 公路交通科技（应用技术版），2010（3）：93-97．
[4]田小革，郑健龙，张起森. 老化对沥青结合料粘弹性的影响[J]. 交通运输工程学报，2004，4（1）：3-6.
[5]陈华鑫，陈拴发，王秉纲. 基质沥青老化行为与老化机理[J]. 山东大学学报（工学版），2009，39（2）：125-130.
[6]Traxler R N. Relation Between Asphalt Compsition and Hardening by Volatilization and Oxidation[C]// Proceedings of the Association of Asphalt Paving Technologists. Washington DC: Association of Asphalt Paving Technologists, 1961: 359-377.
[7]Lamontagne J, Dumas P, Mouillet V, et al. Comparison by Fourier Transform Infrared (FTIR) Spectroscopy of Different Ageing Techniques: Application to Road Bitumens[J]. Fuel, 2001, 80(4): 483-488.
[8]丰晓，叶奋，黄彭. 基于沥青老化的红外光谱羰基吸光度分析[J]. 建筑材料学报，2008，11（3）：375-378.
[9]Williams M L, Landel R F, Ferry J D. The Temperature Dependence of Relaxation Mechanisms in Amorphous Polymers and Other Glass-Forming Liquid[J]. Journal of American Chemical Society, 1955, 77(14): 3701-3707.
[10]Glover C J, Davison R R, Domke C H, et al. Development of A New Method for Assessing Asphalt Binder Durability with Field Validation[R]. Austin: Texas Department of Transportation Research and Technology Implementation Office, 2005.
[11]Rowe G, Sharrock M. Alternate Shift Factor Relationship for Describing Temperature Dependency of Viscoelastic Behavior of Asphalt Materials[]. Transportation Research Record: Journal of the Transportation Research Board, 2011(2207): 125-135.
[12]Yusoff N I M, Jakarni F M, Nguyen V H, et al. Modelling the Rheological Properties of Bituminous Binders Using Mathematical Equations[J]. Construction and Building Materials, 2013, 40: 174-188.
[13]Anderson M, Kriz P, King G, et al. Evaluation of the Relationship Between Asphalt Binder Properties and Non-Load Related Cracking[J]. Journal of the Association of Asphalt Paving Technologists, 2011, 80: 615-664.
[14]朱淮武. 有机分子结构波谱解析[M]. 北京：化学工业出版社，2005.
[15]Hofko B, Porot L, Falchetto Cannone A, et al. FTIR Spectral Analysis of Bituminous Binders: Reproducibility and Impact of Ageing Temperature[J]. Materials and Structures, 2018, 51(2): 45.
