Detecting concealed damage in asphalt pavement based on a composite lead zirconate titanate/polyvinylidene fluoride aggregate

Abstract

As an important research topic, the utilization of wireless sensors has attracted widespread attention in pavement engineering recently. In this study, a composite lead zirconate titanate/polyvinylidene fluoride aggregate (CPA) was embedded into asphalt pavement to monitor the concealed damage. A CPAbased method for monitoring concealed damage in asphalt pavement cracks was established. According to the analysis of the testing results of the CPAbased method, it was found that (a) for monitoring changes in the crack width, the amplitude attenuation of the signal is more sensitive than the frequency shift. Thus, the amplitude attenuation is selected and recommended as a monitoring indicator. (b) The root mean square deviation (RMSD) of the amplitude, as a more universal indicator, was proposed for increasing the sensitivity. It is independent of the asphalt mixture properties and grows approximately parabolically with the crack width in asphalt pavement. (c) A relationship model between the crack width and the RMSD was established. The maximum absolute and relative errors between the measured and monitored crack widths are 0.18 mm and 4.2 %, respectively, according to the laboratory investigation. This study provides a reference for the development and application of intelligent monitoring for concealed damage in asphalt mixtures.

Pixelwise asphalt concrete pavement crack detection via deep learning‐based semantic segmentation method

“…Those methods employed the data-driven knowledge discovery principle of machine learning technologies. However, since pavement cracks images contain complex (1) background conditions, which refers to the pavement types such as asphalt concrete pavement, 36,37 Portland Cement Concrete pavement and Composite pavement 38,39 ; and (2) noise conditions, which may include noises from both the data collection systems and the roadway surroundings. Therefore, the practical in-site usability of those pavement crack analysis methodologies is always doubtable from the views of pavement management personnel.…”