ELECTRICAL RESISTANCE TOMOGRAPHY FOR IMAGING THE SPATIAL DISTRIBUTION OF MOISTURE IN PAVEMENT SECTIONS

Electrical Resistance Tomography (ERT) was used to image spatial moisture distribution and movement in pavement sections during an infiltration test. ERT is a technique for determining the electrical resistivity distribution within a volume from measurement of injected currents and the resulting electrical potential distribution on the surface. The transfer resistance (ratio of potential to injected current) data are inverted using an algorithm based on a finite element forward solution which is iteratively adjusted in a least squares sense until the measured and calculated transfer resistances agree to within some predetermined value. The ERT data were inverted, and the resulting images show (1) the basic structure of the pavement section and (2) the movement of water through the image planes as a function of time during infiltration. An interesting result is that the water does not appear to drain from the section toward the shoulder as had been expected based on the design.

  • Corporate Authors:

    Technomic Publishing Company, Incorporated

    851 New Holland Avenue, Box 3535
    Lancaster, PA  United States  17604
  • Authors:
    • BUETTNER, M
    • Ramirez, A
    • Daily, W
  • Conference:
  • Publication Date: 1996

Language

  • English

Media Info

  • Features: Figures; References;
  • Pagination: p. 342-347

Subject/Index Terms

Filing Info

  • Accession Number: 00725901
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Sep 16 1996 12:00AM