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Study of Best Practices for Pre-overlay Repair and Asphalt Overlay

机译:预覆盖修复和沥青覆盖最佳实践研究

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摘要

Asphalt overlay on existing asphalt and concrete pavements is one of common pavement rehabilitation methods. The performance of asphalt overlay is affected by many factors and varies significantly. This study investigated the factors influencing the performance of overlay. Performance of overlays on existing asphaltic and concrete pavements was reviewed and analyzed. For asphalt overlay of existing concrete pavements, it was found that overlays using doweled concrete to patch the existing concrete pavement performed best, followed by those using non-doweled concrete patching and then asphaltic patching. The transverse cracking development rate in asphalt overlay decreases with the increase of overlay thickness. The current international roughness index (IRI) of overlay is highly correlated with initial IRI of overlay right after placement of overlay. The roughness prediction model in NCHRP 1-37A design guide was calibrated using data collected in Wisconsin. For asphalt overlay on existing asphalt pavements, the longitudinal cracking development rate decreases when the ratio of overlay thickness to milling depth increases.
机译:现有沥青和混凝土路面上的沥青覆盖是常见的路面修复方法之一。沥青铺面的性能受许多因素影响,并且差异很大。本研究调查了影响覆盖性能的因素。审查并分析了现有沥青和混凝土路面上覆盖层的性能。对于现有混凝土路面的沥青铺面,发现用木钉混凝土修补现有混凝土路面的铺面效果最佳,其次是使用非木钉混凝土修补然后是沥青修补的铺面。沥青覆盖层的横向裂缝发展速率随覆盖层厚度的增加而降低。放置覆盖层后,当前的覆盖层国际粗糙度指数(IRI)与覆盖层的初始IRI高度相关。使用在威斯康星州收集的数据对NCHRP 1-37A设计指南中的粗糙度预测模型进行了校准。对于现有沥青路面上的沥青覆盖层,当覆盖层厚度与铣刨深度之比增加时,纵向裂纹发展速率降低。

著录项

  • 来源
    《》|2006年|P.815-823|共9页
  • 会议地点 AtlantaGA(US)
  • 作者单位

    Bloom Consultants, LLC;

    10001 Innovation Dr., Suite 200;

    Milwaukee, WI 53226;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 TV212.57;
  • 关键词

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