| 摘要: |
| 为构建普适性沥青基材料力学行为主曲线，依据主曲线定义提出了将主曲线获取与主曲线拟合分离的两阶段方法，用基质沥青的试验数据对比了采用两阶段方法与规范方法绘制主曲线时的拟合效果，并用沥青砂浆及橡胶测试数据检验了采用两阶段方法绘制主曲线时的稳健性.结果表明：两阶段方法克服了规范方法需预设主曲线模型与移位因子方程的缺陷，可在主曲线拟合阶段对主曲线模型的准确性进行检验，并可用于主曲线模型或移位因子方程的优化；两阶段方法不仅适用于构建具有时温等效特性的沥青基材料力学行为主曲线，对非沥青基材料也有较好的适用性. |
| 关键词: 两阶段方法 主曲线 黏弹性 移位因子 时温等效 沥青基材料 |
| DOI：10.3969/j.issn.1007-9629.2022.09.008 |
| 分类号:U414 |
| 基金项目:国家自然科学基金资助项目（51278203）；广东省自然科学基金资助项目（2019A1515011965） |
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| Two-Stage Method for Developing Mechanical Behavior Master Curve of Asphalt Base Materials |
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TANG Cheng1, WANG Duanyi1, HU Cong1, YUN Di2, DENG Kailing1
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1.School of Civil Engineering and Transportation， South China University of Technology， Guangzhou 510641， China;2.School of Highway， Chang'an University， Xi'an 710064， China
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| Abstract: |
| In order to establish a universal method for developing mechanical behavior master curve of asphalt base materials， a two-stage method was proposed to separate the drawing and fitting of the master curve into two independent stages according to the definition of the master curve. Using the test data of base a phalt， the fitting effect of the two-stage method and the standard method in drawing the master curve was compared. The robustness of the two-stage method in drawing the master curve was verified by using the test data of asphalt mortar and rubber. The results show that the two-stage method overcomes the defect of the standard method which requires the assumption of the master curve model and the shift factor equation. The accuracy of the master curve model can be tested in the master curve fitting stage and can be used to optimize the master curve model or the shift factor equation. The two-stage method is not only suitable for developing mechanical behavior master curve for asphalt base materials with time-temperature superposition characteristics， but also for non-asphalt base materials. |
| Key words: two-stage method master curve viscoelasticity shift factor time-temperature superposition asphalt base material |
