沥青路面智能压实及其关键影响因素研究
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浙江省交通集团高速公路衢州管理中心 衢州市 324000

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中图分类号:

U416.26

基金项目:

武汉理工大学新材料力学理论与应用湖北省重点实验室开放基金(TAM202201)


ZHU Huifang, WANG Liang
Author:
Affiliation:

1.Zhejiang Transportation Group Expressway Quzhou Management Center;2.Zhejiang Transportation Group Expressway Quzhou Management Center Quzhou 324000

Fund Project:

Hubei Key Laboratory of Theory and Application of Mechanics of New Materials, Wuhan University of Technology, TAM202201

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    摘要:

    智能压实作为一种新型道路施工质量监测与管理技术,在沥青路面压实过程中开展了广泛的应用。然而,由于缺乏对压实过程以及沥青混合料颗粒间相互作用机理的了解,往往导致在压实过程中出现过压及压实不均匀的现象,严重影响道路施工质量及服役性能。本研究通过工程现场与室内试验相结合的方法,通过地统计模型半变异函数研究了沥青混合料压实度随压实次数的变化特征,并讨论了温度大小对混合料压实度大小及均匀性的影响;此外,通过室内旋转压实仪与SmartRock传感器从细观尺度揭示了不同压实温度下混合料颗粒受力及转角特征。研究发现:压实度大小及均匀性并不一直与压实遍数呈正相关关系,过度压实反而会导致压实度及其均匀性降低。此外,现场压实温度的变化会引起混合料压实度呈现出显著的区别。温度较高的沥青混合料在压实过程中压实度增幅较快,且最终压实均匀性较高。通过SmartRock传感器的受力及转角特征定量研究混合料在压实作用下的细观响应,研究表明混合料内部的动力响应可直接反映沥青混合料的压实度变化,研究发现温度变化并不一直与压实效果呈现正相关关系,只有在合适的温度范围内,沥青混合料才能达到最佳压实效果。

    Abstract:

    Intelligent compaction is a new road construction quality monitoring and management technology that has been widely used in the asphalt pavement compaction process. However, the lack of understanding of the compaction process and the interaction mechanism between asphalt mixture particles, which leads to over-compaction and non-uniform compaction, which seriously affects the road construction quality and service performance. In this study, the variation of asphalt mixture compaction with the number of compaction times was investigated by using a ground statistical model semi-variance function, and the effect of temperature on the compactness and its uniformity was discussed. It was found that compaction degree and uniformity did not always correlate positively with the number of passes, and that excessive compaction led to a reduction in compaction degree and uniformity. In addition, changes in compaction temperature in the field can cause significant differences in the compaction of the mixes. Higher temperature asphalt mixes have a faster increase in compaction and higher final compaction uniformity during compaction. The study shows that the dynamic response within the mix directly reflects the compaction of the asphalt mix. It is found that temperature variation does not always show a positive correlation with the compaction effect, and that the asphalt mix can only achieve the best compaction effect within the appropriate temperature range.

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  • 收稿日期:2023-02-14
  • 最后修改日期:2023-05-25
  • 录用日期:2023-06-30
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