The impact of bio-oil as rejuvenator for aged asphalt binder

被引：197
作者：
Zhang, Ran [1 ,2 ]
You, Zhanping [2 ]
Wang, Hainian [1 ]
Ye, Mingxiao [3 ]
Yap, Yoke Khin [3 ]
Si, Chundi [2 ,4 ]
机构：
[1] Changan Univ, Sch Highway, South Erhuan Middle Sect, Xian 710064, Shaanxi, Peoples R China
[2] Michigan Technol Univ, Dept Civil & Environm Engn, 1400 Townsend Dr, Houghton, MI 49931 USA
[3] Michigan Technol Univ, Dept Phys, 1400 Townsend Dr, Houghton, MI 49931 USA
[4] Shijiazhuang Tiedao Univ, Inst Transportat Environm & Safety Engn, Shijiazhuang 050043, Hebei, Peoples R China
来源：
CONSTRUCTION AND BUILDING MATERIALS | 2019年 / 196卷
基金：
中国国家自然科学基金;
关键词：
Bio-oil; Rejuvenator; Aging; Bio-rejuvenated asphalt; Activation energy; Rheological properties; Functional groups; DSR; FTIR; Asphalt Binder Cracking Device (ABCD); HIGH-TEMPERATURE PERFORMANCE; WASTE COOKING OIL; RHEOLOGICAL PROPERTIES; PAVEMENT; RESISTANCE;
D O I：
10.1016/j.conbuildmat.2018.10.168
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
Recycling technology has been widely applied on road pavement due to the aging problem of asphalt binder and the extensive requirement for maintenance. The aim of this research is to use bio-oil generated from sawdust as a rejuvenator to recycle aged asphalt. In this research, the performance graded asphalts PG 58-28 and PG 64-22 were selected as the base binders. The bio-oil contents were 10%, 15% and 20% of the total binder by weight. The Rotational Viscometer (RV) test, Dynamic Shear Rheometer (DSR) test, and Asphalt Binder Cracking Device (ABCD) test were applied to characterize the properties of bio-rejuvenated asphalts and virgin control asphalts. Additionally, the Fourier Transform Infrared Spectroscopy (FTIR) test was conducted to characterize the degree of restoration of aged asphalt binders from the aspect of functional groups. It was found that the bio-rejuvenator decreases the viscosity and activation energy, while increasing the temperature susceptibility and the content of viscous components of the aged asphalts. The aged asphalt can be softened by the bio-rejuvenator significantly; with the use of bio-rejuvenator, the rutting index of aged asphalts PAV PG 58-28 and PAV PG 64-22 at high temperatures from 52 degrees C to 76 degrees C was decreased by 75.5% and 77.2% in average, respectively. The bio-oil can restore the low temperature crack resistance of aged asphalts PAV PG 58-28 and PAV PG 64-22 to, or even better than, the level of virgin asphalts. The sulfoxide (S=O) index and aromatic (C=C) index can be used to evaluate the degree of restoration using bio-rejuvenator to recycle aged asphalt, but carbonyl (C=O) is not applicable. Therefore, the bio-oil generated from sawdust can be used as a rejuvenator to recycle the aged asphalts PAV PG 58-28 and PAV PG 64-22. Moreover, the bio-rejuvenator contents of 15% and 20% are recommended to recycle the aged asphalt PAV PG 58-28 and aged asphalt PAV PG 64-22, respectively. (C) 2018 Elsevier Ltd. All rights reserved.
引用
收藏
页码：134 / 143
页数：10
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