...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Transportation Research Record >Evaluating Potential for Reflection Cracking with Rolling Dynamic Deflectometer
【24h】

Evaluating Potential for Reflection Cracking with Rolling Dynamic Deflectometer

机译：用滚动动态偏转仪评估反射裂纹的可能性

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A common rehabilitation strategy used for repairing aged concrete pavement is to place a hot-mix asphalt (HMA) overlay on the existing concrete pavement. However, reflection cracks are often found to propagate from the underlying cracks and joints through the HMA layer. As such, much reflection cracking is believed to be caused by differential vertical and horizontal movements in the concrete pavement. A common method of determining the differential vertical movements is by measuring the load transfer efficiency (LTE) at the joints by using nondestructive deflection testing devices. A study was conducted with a rolling dynamic deflectometer (RDD) to evaluate the movement of joints in concrete pavements. Evaluation of joint movements by RDD testing permits estimation of the LTE of each joint or transverse crack. On the basis of the assumption that reflection cracks are more likely to form at joints or cracks with low LTE than with high LTE, pavement engineers can use the results to identify areas with low LTE and perform necessary repairs at these locations to reduce the potential for creating reflection cracking. Field data collected before rehabilitation work on US-82 near Gainesville, Texas, are presented as a case study, and the benefits of continuous deflection profiling for use in the district's rehabilitation strategy are discussed.
机译：用于修复老化的混凝土路面的常见修复策略是在现有混凝土路面上放置热拌沥青（HMA）覆盖层。然而，经常发现反射裂纹从下层裂纹和接缝通过HMA层传播。因此，人们认为很多反射裂缝是由混凝土路面中垂直和水平运动的差异引起的。确定差异垂直运动的一种常用方法是通过使用无损挠度测试设备测量接头处的载荷传递效率（LTE）。滚动动态偏转仪（RDD）进行了一项研究，以评估混凝土路面中缝的运动。通过RDD测试评估关节运动可以估计每个关节或横向裂缝的LTE。基于这样的假设：与高LTE相比，低LTE的连接处或裂缝更有可能形成反射裂缝，路面工程师可以使用结果确定低LTE的区域并在这些位置进行必要的维修，以减少潜在的裂缝。产生反射裂纹。作为案例研究，介绍了在德克萨斯州盖恩斯维尔附近的US-82进行修复工作之前收集的现场数据，并讨论了连续偏转轮廓分析在该地区的修复策略中的好处。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号