Development of an analytic approach utilizing the extended common midpoint method to estimate asphalt pavement thickness with 3-D ground-penetrating radar

Shan Zhao, Imad L Al-Qadi

Research output: Contribution to journalArticle

Abstract

As a nondestructive technique, ground-penetrating radar (GPR) has been applied to estimate asphalt pavement thickness. The extended common midpoint (XCMP) method is a method that can be used on the air-coupled, pulsed horn antenna to increase the accuracy of asphalt pavement thickness estimation without calibrating the dielectric constant by taking cores. 3-D GPR is a multi-array, stepped-frequency radar that can measure both in-line and cross-line directions at a very close sampling interval. By developing signal-processing and numerical analysis techniques, this research integrates 3-D GPR with the XCMP method. By validating the developed algorithm at a full-scale test site, the study concludes that by using signal processing techniques and numerical analysis approaches, 3-D GPR can be used to accurately predict asphalt layer thickness using the XCMP method when the layer thickness is greater than 64mm.

Original languageEnglish (US)
Pages (from-to)29-36
Number of pages8
JournalNDT and E International
Volume78
DOIs
StatePublished - Mar 2016

Keywords

  • 3-D GPR
  • Asphalt concrete pavement
  • Extended common midpoint method (XCMP)
  • Layer thickness
  • Nondestructive testing (NDT)

ASJC Scopus subject areas

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

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