An innovative method for measuring pavement dielectric constant using the extended CMP method with two air-coupled GPR systems

Zhen Leng, Imad L. Al-Qadi

Research output: Journal article publicationJournal articleAcademic researchpeer-review

50 Citations (Scopus)


Ground penetrating radar (GPR) is a common non-destructive tool for pavement layer thickness measurement. The accuracy of such measurement is directly affected by the accurate prediction of the dielectric constant of pavement material using GPR. In this study, an innovative extended common mid-point (XCMP) method using two air-coupled GPR systems was developed to improve the accuracy of the traditional method for pavement material dielectric constant estimation. The equations and algorithm for calculating the dielectric constant of pavement material were developed, and then the accuracy of this new method was validated successfully by the data collected from a custom-designed test site.
Original languageEnglish
Pages (from-to)90-98
Number of pages9
JournalNDT and E International
Publication statusPublished - 1 Jan 2014


  • Common mid-point method
  • Dielectric constant
  • Ground penetrating radar
  • Pavement thickness

ASJC Scopus subject areas

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

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