Rheological Properties Evaluation and System Fusion Behavior of Bio-based Resin Modified Asphalt Binders
JIANG Xiuming1, DING Zhan2,3, SUN Chao1, YUE Lei1, LI Huifeng1, LI Peilong1,4,*
1 School of Highway, Chang’an University, Xi’an 710064, China 2 School of Water and Environment, Chang’an University, Xi’an 710054, China 3 Key Laboratory of Subsurface Hydrology and Ecological Effect in Arid Region of Ministry of Education, Chang’an University, Xi’an 710054, China 4 Key Laboratory of Road Structure and Material Ministry of Transport, Chang’an University, Xi’an 710064, China
Abstract: Limited by the reserves and supply of petroleum resources, introducing biomass materials into petroleum asphalt binders has become a hot topic. In this study, three kinds of bio-based resins (i.e., BPF, BPU and BPF-PU) were synthesized from wheat straw liquefaction pro-ducts and used for the preparation of bio-asphalt binders. This work aims to investigate the effect of bio-based resins on the rheological properties of the neat asphalt binder and their interactions. Firstly, the effects of bio-based resins on viscoelastic properties and high-temperature rutting resistance of the asphalt binder were evaluated by the frequency scanning test and the multiple stress creep recovery test. Subsequently, the phase structure of resin-asphalt system was analyzed based on the rheological theory. Finally, the fusion behavior of resins and asphalt binders was explored by fluorescence microstructure and functional group distribution. The results indicate that the percentage elastic components in the neat asphalt binder can be increased by BPF and BPF-PU, leading to superior anti-rutting performance. However, BPU tends to enhance the viscous response of the neat asphalt binder. The resins can be dispersed into the neat asphalt binder and form a uniform and stable phase structure, which may be attributed to the formation of ether bonds (C-O-C) between the resin and the neat asphalt binder. This investigation contributes to provide new ideas for the value-added conversion of the crop straw and the development of bio-asphalt binders, while further research is needed in the comprehensive evaluation of the bio-asphalt binder performance.
通讯作者:
*栗培龙,长安大学公路学院教授、博士研究生导师,University of California at Davis(UC Davis)访问学者,注册公路检测工程师(公路、材料)。现任公路学院机场工程系主任、道路结构与材料交通运输行业重点实验室副主任。主要从事路基路面/机场道面材料结构与性能研究,具体研究方向包括:新型高性能、环保型路面材料的研究与开发,沥青混合料微细观力学作用行为及机理,道路材料服役行为及动力学特性,新型道路养护材料与技术等,发表学术论文120余篇(其中SCI/EI检索60余篇),授权专利30余项。lipeilong@chd.edu.cn
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2024, Vol. 38 
