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山东大学学报 (工学版) ›› 2022, Vol. 52 ›› Issue (3): 61-69.doi: 10.6040/j.issn.1672-3961.0.2020.407

• • 上一篇    

新旧沥青界面融合实测与耗散粒子动力学模拟

陈龙1,支鹏飞2,李晋1,陈宏斌2,何兆益3,崔新壮4   

  1. 1.山东交通学院交通土建工程学院, 山东 济南 250357;2.甘肃省交通科学研究院集团有限公司, 甘肃 兰州 730030;3.重庆交通大学土木工程学院, 重庆 400074;4.山东大学土建与水利学院, 山东 济南 250061
  • 发布日期:2022-06-23
  • 作者简介:陈龙(1989— ),男,山东济南人,博士,讲师,主要研究方向为沥青路面新型材料研发与力学模型性能评价. E-mail: hellolong0701@163.com
  • 基金资助:
    “十三五”国家重点研发项目(2018YFB1600100);国家自然科学基金面上项目(51978116);山东省自然科学基金项目(ZR2020QE274);山东省交通运输厅科技计划项目(2019B63,2020B93,2021B11);山东交通学院博士科研启动基金项目(50004945,50004946)

Measurement and dissipative particle dynamics simulation of interface diffusion between virgin and aged asphalt

CHEN Long1, ZHI Pengfei2, LI Jin1, CHEN Hongbin2, HE Zhaoyi3, CUI Xinzhuang4   

  1. 1. School of Transportation and Civil Engineering, Shandong Jiaotong University, Jinan 250357, Shandong, China;
    2. Gansu Provincial Transportation Research Institute Group Co., Ltd., Lanzhou 730030, Gansu, China;
    3. College of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, China;
    4. School of Civil Engineering, Shandong University, Jinan 250061, Shandong, China
  • Published:2022-06-23

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摘要： 为扩充新旧沥青界面再生融合特征的研究手段,多尺度量化剖析新旧沥青界面再生融合速率、融合程度等行为参数,通过动态剪切流变试验,基于细观尺度实测研究新旧沥青界面再生融合规律;通过耗散粒子动力学,基于介观尺度模拟研究新旧沥青界面再生融合机理行为并验证动态剪切流变试验实测结果。分析表明:加热温度、加热时间均与新旧沥青界面再生融合程度呈正相关关系,加热温度与新旧沥青界面再生融合速率呈线性正相关关系,加热时间与新旧沥青界面再生融合速率呈指数负相关关系;加热时间从10~120 min,沥青界面扩散激活能增长了3~5倍;采用新添沥青单一调和的方式再生效果不佳,各试验条件下沥青界面再生融合程度均不足50%,但采用新添沥青与再生剂复合的方式,新旧沥青界面再生融合程度提升2倍左右,并同比降低沥青界面扩散激活能10%~30%;剪切速率可较大幅度影响新旧沥青界面再生融合作用,并且相比于较高加热温度(358~418 K),在低温加热条件下(298~358 K)适当增加剪切速率对改善新旧沥青界面再生融合特征效果更明显;采用的沥青四组分分子结构模型、构建的耗散粒子动力学粗粒化结构模型和选取的模拟计算参数为跨尺度拓展量化表征新旧沥青界面再生融合行为特征与规律提供重要支撑。

关键词: 新旧沥青界面, 动态剪切流变测试, 耗散粒子动力学模拟, 界面融合速率, 界面融合程度, 扩散激活能

中图分类号: 

  • U414
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