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Studying the anti-ageing performance of road asphalt based on penetration and ductility
Proceedings of the Institution of Civil Engineers - Engineering Sustainability ( IF 1.2 ) Pub Date : 2021-03-24 , DOI: 20.00059
Haitao Zhang, Jingdi Li, Mingyang Gong

The existing research on modified asphalt is primarily focused on how to improve the high- and low-temperature performances (high-temperature rutting and low-temperature cracking) of asphalt, but the improvement of the anti-ageing performance of asphalt is also important. The research objects of the present study were equivalent-penetration (high-temperature performance) and equivalent-ductility (low-temperature performance) asphalt specimens, and the anti-ageing performances of different specimens were compared from both the macro- and micro-perspectives. From the macro-perspective, taking the penetration, ductility, viscosity and softening point of asphalt as the experimental indexes, the anti-ageing performances of different asphalt specimens were compared and analysed based on the changes in different indicators at different ageing times. From the micro-perspective, the macro-test results of asphalt specimens with different durabilities were verified by an asphalt component test and the analysis of environmental scanning electron microscopy images. The research results have certain theoretical value for scientifically understanding the technical characteristics of different modifiers, the research and development of modifiers and the formation mechanism of modified asphalt.

中文翻译:

基于针入度和延展性的道路沥青抗老化性能研究

现有的改性沥青研究主要集中在如何提高沥青的高低温性能(高温车辙和低温开裂),但提高沥青的抗老化性能也很重要。本研究的研究对象为等效渗透(高温性能)和等效延展性(低温性能)沥青试件,从宏观和微观两个角度比较不同试件的抗老化性能. 从宏观角度,以沥青的针入度、延展性、粘度和软化点为试验指标,根据不同老化时间不同指标的变化,对比分析不同沥青试件的抗老化性能。从微观角度,通过沥青组分试验和环境扫描电镜图像分析,验证了不同耐久性沥青试件的宏观试验结果。研究成果对科学认识不同改性剂的技术特性、改性剂的研发和改性沥青的形成机理具有一定的理论价值。
更新日期:2021-03-24
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