中文核心期刊
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中国科技核心期刊
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重庆交通大学学报（自然科学版）

重庆交通大学学报（自然科学版） ›› 2023, Vol. 42 ›› Issue (6): 47-54.DOI: 10.3969/j.issn.1674-0696.2023.06.07

• 交通+大数据人工智能 • 上一篇    

无机微粉改性沥青及混合料的路用性能分析

贾晓东1,2，梁乃兴1，彭义雯3   

  1. (1.重庆交通大学 土木工程学院，重庆 400074；2.重庆工商职业学院 城市建设工程学院，重庆 400052； 3.重庆交通大学 经济与管理学院，重庆 400074)
  • 收稿日期:2021-06-23 修回日期:2021-11-19 发布日期:2023-08-01
  • 作者简介:贾晓东（1988—），男，陕西宝鸡人，副教授，博士，主要从事道路建材方面的研究。E-mail：280504324@qq.com 通信作者：梁乃兴（1953—），男，陕西岐山人，教授，博士，博士生导师，主要从事道路建材方面的研究。E-mail：382393350@qq.com
  • 基金资助:
    重庆教委科技计划项目(KJQN202104001)； 重庆市自然科学基金面上项目(cstc2020jcyj-msxmX0320)

Road Performance of Inorganic Micro-powder Modified Asphalt and Its Mixture

JIA Xiaodong1, 2, LIANG Naixing1, PENG Yiwen3   

  1. (1. School of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, China; 2. School of Urban Construction Engineering, Chongqing Technology and Business Institute, Chongqing 400052, China; 3. School of Economics and Management, Chongqing Jiaotong University, Chongqing 400074, China)
  • Received:2021-06-23 Revised:2021-11-19 Published:2023-08-01

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摘要： 为了研究无机微粉消石灰和水泥对沥青及混合料的路用性能影响作用，利用自主研发的超声波风压分散仪制备了改性沥青及混合料，再通过软化点、针入度、测力延度、扫描电镜、冻融劈裂试验、低温弯曲梁试验和间接拉伸疲劳试验分析了两类6种微粉对沥青及混合料的水稳定性、低温抗裂性和疲劳性能影响规律，并对其影响机理进行了深入分析。研究结果表明：两类无机微粉均可提高混合料的水稳定性和疲劳性能，且随着微粉粒径的减小(比表面积增加)，水稳定性和疲劳性能改善效果越明显；相同粒径下，水泥水稳定性好于消石灰、但疲劳性能则相反；两类微粉对混合料的低温性能有不利影响，但随着粒径的减小，不利影响逐渐减小，消石灰的对混合料低温性能的不利影响小于水泥。

关键词: 道路工程；沥青路面；无机微粉；粒径；冻融劈裂；路用性能

Abstract: In order to study the effect of inorganic micro-powder hydrated lime and cement on the road performance of asphalt and its asphalt mixture, the modified asphalt and its mixture were prepared by using the self-developed ultrasonic wind pressure dispersion instrument. Through softening point, penetration, force ductility, scanning electron microscope, freeze-thaw splitting test, low-temperature bending beam test and indirect tensile fatigue test, the influence law of two types and six types of micro-powder on the water stability, low-temperature crack resistance, and fatigue performance of asphalt and its asphalt mixture was analyzed, and the influence mechanism was also analyzed in depth. The research results show that both kinds of inorganic micro-powder can improve the water stability and fatigue performance of the mixture. As the particle size of the micro-powder decreases (the specific surface area increases), the improvement effect of water stability and fatigue performance becomes more obvious. Under the same particle size, the stability of cement water is better than that of hydrated lime, but the fatigue performance is opposite. Two types of micro-powder have adverse effects on the low-temperature performance of asphalt mixtures, but as the particle size decreases, the adverse effects gradually decrease. The adverse effect of hydrated lime on the low-temperature performance of the mixture is smaller than that of cement.

Key words: highway engineering; asphalt pavement; inorganic micro-powder; particle size; freeze-thaw splitting; road performance

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