Application of infrared thermography for debonding detection in asphalt pavements
Application of infrared thermography for debonding detection in asphalt pavements
复制标题
红外热成像技术在沥青路面脱粘检测中的应用
DOI：
10.1007/s13349-019-00337-8
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发表时间：
2019
影响因子：
4.4
通讯作者：
Anshuman Srivastava
中科院分区：
文献类型：
--
作者：
V. Vyas;V. Patil;A. Singh;Anshuman Srivastava
在路面损坏监测和维护中的常规测试做法，如取芯，往往是缓慢的、破坏性的，而且不能完全代表整个路面路段。基于无损检测技术的新兴技术，不需要实施破坏性措施或依赖于点数据的外推，只需将其发展成适当的技术和一套检测方案即可实施。一种使用任何结构的红外辐射来检查潜在缺陷的新兴技术是红外热像仪(IRT)。在含有地下缺陷的路面斑块中，流向路面表面的热流本身取决于入射的太阳辐射、环境温度和其他气象因素，受到干扰，导致缺陷斑块和声音斑块的热特征不同。这种热特征的差异可能会被热成像相机检测到。本研究旨在探讨IRT技术在沥青路面表层脱层缺陷检测中的应用潜力。为此，在现场修建了沥青路面试验路段，并在路段内人工诱导了不同的层间粘结条件。对于每一种键合条件，都采用了一种新的方法来对热信号进行定量和定性分析。评价了不同脱粘剂对沥青路面整体热性能的影响。对白天加热和夜间降温循环之间的转换时间进行了估计，以确定沥青路面检测的合适时间。文中介绍了该方法的结果、优点和局限性。
Conventional testing practices in pavement damage surveillance and maintenance such as coring tend to be slow, destructive in nature and not wholly representative of the entire stretch of the pavement. Newly emerging technologies based on non-destructive testing techniques, do not demand implementing destructive measures or relying on extrapolation of point data and can be implemented after developing them into a proper technique and a set testing protocol. One such emerging technique that uses infrared emissions from any structure to inspect underlying defects is infrared thermography (IRT). In a patch of pavement containing subsurface defects, the heat flow to the surface of the pavement, which itself depends on the incident solar radiation, ambient temperature and other meteorological factors, gets disrupted causing a difference in the thermal signature of the defective and the sound patches. This difference in thermal signature can potentially be detected by a thermal imaging camera. This study aims at exploring the potential of IRT technique to assess the subsurface debonding defect in asphalt pavements. For this purpose, an in situ asphalt pavement test section has been constructed and different interlayer bonding conditions have been artificially induced in it. A novel way for quantitative and qualitative analyses of thermal signatures, using MATLAB for each of these bonding conditions has been carried out. The effect of different debonding agents on the overall thermal behavior of asphalt pavement has also been evaluated. Interchange time duration between day heating and night cooling cycles has been estimated, to determine the suitable time duration for asphalt pavement inspection. The results, advantages, and limitations of the method have been presented.