基于DMA法的沥青及混合料疲劳自愈合评价方法研究.doc

文档介绍：
基于 DMA 法的沥青及混合料疲劳自愈合评
价方法研究#
王昊鹏,杨军,龚明辉**
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(东南大学交通学院,南京 210096)
摘要:在分析沥青及沥青混合料性质的基础上,介绍了动态力学分析法(DMA)和休息时
间的引入方式,对基于模量、耗散能、伪应变的三类自愈合评价指标进行了综述,并分析了
其优点和不足。认为:将伪应变和耗散能相结合,进行多因素敏感性分析,是研究沥青及混
合料的疲劳损伤自愈合行为,建立沥青及混合料自愈合评价模型的科学有效方法。
关键词:道路工程;DMA;沥青;自愈合;耗散能;伪应变;评价方法
中图分类号:U416
Research on the Fatigue and Self-healing Evaluation
Methodology of Asphalt and Mixtures Using DMA
WANG Haopeng, YANG Jun, GONG Minghui
(School of Transportation, Southeast University, Nanjing 210096)
Abstract: The paper outlined DMA (Dynamic mechanical analysis) method and ways to introduce
rest period on the basis of analyzing asphalt and asphalt mixtures’ properties. Three types of
self-healing index based on the modulus, dissipated energy and pseudo strain were summarized,
while the advantages and disadvantages of healing index were argued. In conclusion, the
sensibility analysis of multi bining pseudo strain with dissipated energy is a scientific
and effective method to research fatigue damage and self-healing behaviors of asphalt and
mixtures, also contributing to establishing self-healing evaluation models of asphalt and mixtures.
Key words: road engineering; DMA; asphalt; self-healing; dissipated energy; pseudo strain;
evaluation methodology
0 引言
沥青混凝土路面以其强度高、舒适性好等优点而广受道路建设者的青睐。沥青材料具有
自愈合(Self-Healing)的能力,众多学者开展了大量的研究来证实并量化沥青材料的自愈
合性能[1,2]。自愈,可以简单地定