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A comparative study for fatigue characterization of asphalt binder using the linear amplitude sweep test

机译：用线性振幅扫描试验对沥青粘合剂疲劳表征的对比研究

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摘要

Currently the linear amplitude sweep (LAS) test is one of the main fatigue protocols to estimate the fatigue resistance of asphalt binder. In past 10-years, several data interpretation approaches have been developed for the LAS-based binder fatigue modeling. The objective of this paper is to compare the currently available analytical approaches for the data interpretation of LAS test and further investigate the potential links between the different LAS-based fatigue evaluations of asphalt binders. Totally 20 types of unmodified and modified asphalt binders are selected in this study, which actually cover 35 sample conditions under different aging and temperature levels. Experimental and analysis results indicate that the full fatigue performance of asphalt binder can be characterized from with the S-VECD & G~R approach. The failure property in LAS test is also well correlated to the binder fatigue life simulation and thus can be utilized to more efficiently distinguish the binder fatigue resistance. Furthermore, the performance predictive accuracy of AASHTO TP101 specification method is strongly dependent on the selected failure definition. Taking the artificial failure definition of 35% reduction in IG*lsin d largely underestimates the binder fatigue life when compared to the S-VECD & G~R approach. However, when a material-dependent failure definition of peak stress is alternatively employed in specification method, the correlation of the predictive binder fatigue life between the two analytical approaches is significantly improved and a linear relationship is additionally found between the S-VECD & G~R approach and specification method. Therefore, it is recommended that when only the standard LAS test with one loading rate is available in practice, the peak stress failure definition should be used in AASHTO TP101 specification method to provide relatively accurate fatigue performance estimation of asphalt binder.
机译：目前线性振幅扫描（LAS）测试是估计沥青粘合剂疲劳性抗疲劳性的主要疲劳方案之一。在过去的10年中，已经为基于LAS的粘合剂疲劳建模开发了几种数据解释方法。本文的目的是比较目前可用的LAS测试数据解释的分析方法，并进一步研究了沥青粘合剂的不同LAS的疲劳评估之间的潜在环节。在本研究中选择了20种类型的未改性和改性沥青粘合剂，其实际上在不同的老化和温度水平下覆盖了35个样品条件。实验和分析结果表明，沥青粘合剂的全疲劳性能可以用S-Vecd＆G〜R方法表征。 LAS测试中的故障性质也与粘合剂疲劳寿命模拟相比良好相关，因此可以利用更有效地区分粘合剂疲劳抗性。此外，AASHTO TP101规范方法的性能预测精度强烈依赖于所选择的故障定义。采用IG * LSIN D减少35％的人工失效定义在很大程度上低估了与S-VECD＆G〜R方法相比的粘合剂疲劳寿命。然而，当在规范方法中替代地使用峰值应力的材料依赖性故障定义时，在S-Vecd＆g〜之间另外发现了两种分析方法之间的预测粘合剂疲劳寿命的相关性。 R方法和规范方法。因此，建议只有在实践中只有一个装载速率的标准LAS测试时，应在AASHTO TP101规范方法中使用峰值应力故障定义，以提供沥青粘合剂的相对准确的疲劳性能估计。

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  • 来源
    《Materials and structures》 |2020年第4期|95.1-95.12|共12页
  • 作者

    Chao Wang; Yifang Chen; Wei Xie;

  • 作者单位

    Department of Road & Urban Railway Engineering Beijing University of Technology Beijing 100124 People's Republic of China;

    Department of Road & Urban Railway Engineering Beijing University of Technology Beijing 100124 People's Republic of China;

    Department of Road & Urban Railway Engineering Beijing University of Technology Beijing 100124 People's Republic of China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Asphalt binder; Fatigue damage; Fatigue failure; Linear amplitude sweep; Time sweep;

    机译：沥青粘合剂;疲劳损坏;疲劳失败;线性振幅扫描;时间扫描;

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