| 摘要: |
| 为精准表征超大粒径沥青混合料（LSAM-50）柔性基层路面的动态黏弹力学响应，对LSAM-50进行动态模量试验，分析了温度对LSAM-50黏弹参数的影响，构建了基于广义对数Sigmoidal模型的黏弹参数主曲线以及基于广义Maxwell模型的黏弹性本构关系.结果表明：温度对LSAM-50黏弹参数的影响显著，温度升高后LSAM-50模量的变化由集料嵌挤力主导，动态模量与存储模量随着温度的升高逐渐降低后趋于稳定；由于LSAM-50具有更大的粒径和集料嵌挤力，其高温抗变形能力比AC-20和AC-13更强；可用广义Maxwell模型构建LSAM-50的黏弹本构关系，其相关性不低于0.99. |
| 关键词: 超大粒径沥青混合料 动态模量 主曲线 线黏弹性 |
| DOI：10.3969/j.issn.1007-9629.2024.04.006 |
| 分类号:U416 |
| 基金项目:交通运输行业重点科技项目（2021-MS1-011）；陕西省创新能力支撑计划（2022TD-06）；长安大学中央高校基本科研业务费专项资金资助项目（300102213401）；陕西省交通科技项目（重大一类）（20-02K）；山东省交通科技项目（2021B82） |
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| Viscoelastic Properties and Temperature Effects of Super Large Particle Size Asphalt Mixture |
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JIANG Yingjun1,2, YI Yong1,2, TIAN Tian1,2, ZHANG Yu1,2, FAN Jiangtao1,2
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1.Key Laboratory for Special Area Highway Engineering of Ministry of Education， Chang’an University， Xi’an 710064， China;2.School of Highway， Chang’an University， Xi’an 710064， China
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| Abstract: |
| To accurately characterize the dynamic viscoelastic mechanical response of super large particle size asphalt mixture（LSAM-50） flexible subgrade pavement， LSAM-50 dynamic modulus test was conducted to analyze the effect of temperature on LSAM-50 viscoelastic parameters. The master curve of viscoelastic parameters was constructed based on the generalized logarithmic Sigmoidal model. The LSAM-50 viscoelastic principal structure based on the generalized Maxwell model was constructed. The results show that temperature has a significant effect on the viscoelastic parameters of LSAM-50， and the aggregate embedding force dominates the change of LSAM-50’s modulus when the temperature increases. The dynamic modulus and storage modulus decrease gradually with the increase of temperature and then stabilize. As LSAM-50 has larger particle size and aggregate embedding force， LSAM-50 has stronger resistance to deformation at high temperature compared with AC-20 and AC-13. The generalized Maxwell model can be used to construct LSAM-50 viscoelastic relationship with correlation not lower than 0.99. |
| Key words: super large particle size asphalt mixture dynamic modulus master curve linear viscoelasticity |
