In situ measurement of pavement thickness and dielectric permittivity by GPR using an antenna array

Hai Liu, Motoyuki Sato

Research output: Contribution to journalArticlepeer-review

75 Citations (Scopus)

Abstract

We present a ground penetrating radar (GPR) system, which uses an antenna array for in situ measurements of the thickness and dielectric permittivity of an asphalt pavement layer. We calibrated the antenna array by considering the antenna phase center and the antenna offset. The results of the laboratory measurements demonstrate that the proposed calibration method can greatly improve the accuracy of the velocity and thickness estimations when compared with the conventional method. A field measurement conducted on a highway pavement shows that the error of the thickness estimation of the asphalt layer is less than 6 mm (10%).

Original languageEnglish
Pages (from-to)65-71
Number of pages7
JournalNDT and E International
Volume64
DOIs
Publication statusPublished - 2014 Jun

Keywords

  • Antenna array
  • Asphalt pavement
  • Dielectric permittivity
  • Ground penetrating radar (GPR)
  • Thickness

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

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