title: Rapid Detection Methods for Asphalt Pavement Thicknesses and Defects by a Vehicle-Mounted Ground Penetrating Radar (GPR) System.
abstract: The thickness estimation of the top surface layer and surface layer, as well as the detection of road defects, are of great importance to the quality conditions of asphalt pavement. Although ground penetrating radar (GPR) methods have been widely used in non-destructive detection of pavements, the thickness estimation of the thin top surface layer is still a difficult problem due to the limitations of GPR resolution and the similar permittivity of asphalt sub-layers. Besides, the detection of some road defects, including inadequate compaction and delamination at interfaces, require further practical study. In this paper, a newly-developed vehicle-mounted GPR detection system is introduced. We used a horizontal high-pass filter and a modified layer localization method to extract the underground layers. Besides, according to lab experiments and simulation analysis, we proposed theoretical methods for detecting the degree of compaction and delamination at the interface, respectively. Moreover, a field test was carried out and the estimated results showed a satisfactory accuracy of the system and methods.
authors.affiliation: Institute of Electronics, Chinese Academy of Science, Beijing 100190, China. dzhcsk@126.com.|University of Chinese Academy of Science, Beijing 100149, China. dzhcsk@126.com.
authors.forename: Zehua
authors.initials: Z
authors.lastname: Dong
authors.affiliation: Institute of Electronics, Chinese Academy of Science, Beijing 100190, China. shengboye@163.com.
authors.forename: Shengbo
authors.initials: S
authors.lastname: Ye
authors.affiliation: Institute of Electronics, Chinese Academy of Science, Beijing 100190, China. gyze@163.com.
authors.forename: Yunze
authors.initials: Y
authors.lastname: Gao
authors.affiliation: Institute of Electronics, Chinese Academy of Science, Beijing 100190, China. gyfang@mail.ie.ac.cn.
authors.forename: Guangyou
authors.initials: G
authors.lastname: Fang
authors.affiliation: Institute of Electronics, Chinese Academy of Science, Beijing 100190, China. xjzhang@mail.ie.ac.cn.
authors.forename: Xiaojuan
authors.initials: X
authors.lastname: Zhang
authors.affiliation: Beijing Road Engineering Quality Supervision Station, Beijing 100076, China. xuezhongjun@126.com.
authors.forename: Zhongjun
authors.initials: Z
authors.lastname: Xue
authors.affiliation: Beijing Road Engineering Quality Supervision Station, Beijing 100076, China. gonglujiance@126.com.
authors.forename: Tao
authors.initials: T
authors.lastname: Zhang
keywords: asphalt layer thickness; degree of compaction; delamination at interfaces; layer localization method; top surface asphalt layer; vehicle-mounted GPR system