Investigation on dynamic response and compaction degree characterization of multi-layer asphalt pavement under vibration rolling

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2023-01-01 DOI:10.3934/era.2023114

Hongyu Shan, H. Dan, Shiping Wang, Zhi Zhang, Renkun Zhang

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引用次数: 1

Abstract

Asphalt mixture is composed of asphalt binder with aggregates of different sizes and compacted under static or dynamic forces. In practical engineering, compaction is a critical step in asphalt pavement construction to determine the quality and service life of pavement. Since the dynamic response characteristics of asphalt pavement can reflect the compaction state of asphalt mixture in the process of compaction, the establishment of the relationship between dynamic response characteristics and compaction degree is definitely significant. In this paper, a series of vibration sensors were adopted to capture the dynamic response signal of the vibration drum and asphalt mixture in the process of vibrating compaction for different surface courses of pavement. Then, the change regulations of vibration acceleration of vibrating drum and asphalt mixture were analyzed, and the quantitative linear relationship was established between accelerations of vibrating drum and asphalt pavement compactness. Further, the concept of evaluation unit (i.e., within 2 meters along the driving direction of the roller) and prediction method of compaction degree were proposed as well. The results showed that under the same vibration compaction condition, the compaction degree values of the top, middle and bottom layers have obvious differences, which should be taken seriously into consideration in the compaction process. Meanwhile, there is little difference which respectively are 2.8, 1.3 and 0.82% for the top, middle and bottom layers between the compaction degrees obtained by the proposed method and measured test. Therefore, the average value of the acceleration peak value of vibration drum within the evaluation unit can be adopted as the characterization index of the compaction degree of asphalt pavement. The investigation of this study can provide the technical reference for compaction control of asphalt pavement to a large extent.

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振动碾压下多层沥青路面动力响应及压实度特性研究

沥青混合料是由沥青粘结剂和不同粒径的集料在静、动力作用下压实而成。在实际工程中，压实是沥青路面施工中决定路面质量和使用寿命的关键环节。由于沥青路面的动力响应特性可以反映沥青混合料在压实过程中的压实状态，因此建立动力响应特性与压实程度之间的关系无疑具有重要意义。本文采用一系列振动传感器，对不同路面层段的振动压实过程中振动鼓和沥青混合料的动态响应信号进行捕捉。分析了振动鼓振动加速度与沥青混合料的变化规律，建立了振动鼓振动加速度与沥青路面密实度之间的定量线性关系。提出了评价单元(即沿压路机行驶方向2 m范围内)的概念和压实度的预测方法。结果表明:在相同的振动压实条件下，上、中、底层的压实度值存在明显差异，在压实过程中应予以重视。同时，本文方法得到的顶、中、底三层的压实度与实测试验值相差不大，分别为2.8、1.3、0.82%。因此，评价单元内振动鼓加速度峰值的平均值可作为沥青路面压实度的表征指标。研究结果可在很大程度上为沥青路面压实控制提供技术参考。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.