ELECTRICAL RESISTANCE TOMOGRAPHY FOR IMAGING CONCRETE STRUCTURES

Electrical Resistance Tomography (ERT) has been used to non-destructively examine the interior of reinforced concrete pillars in the laboratory during a water infiltration experiment. 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 interactively adjusted in a least squares sense until the measured and calculated transfer resistances agree to within some predetermined value. ERT has been shown to be an effective means of imaging water infiltration in concrete. Other applications for this technology include monitoring of curing in concrete structures, detecting cracks in concrete structures, detecting rebar location and corrosion state, monitoring slope stability and the stability of footings, detecting and monitoring leaks from storage tanks, monitoring thermal processes during environmental remediation, and for detecting and monitoring contaminants in soil and groundwater.

• 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:
  • Structural Materials Technology. An NDT Conference.
  • Location: San Diego, CA
  • Date: 1996-2-20 to 1996-2-23
• Publication Date: 1996

Language

• English

Media Info

• Features: Figures; References;
• Pagination: p. 299-304

Subject/Index Terms

• TRT Terms: Algorithms; Columns; Concrete structures; Cracking; Electrical resistance; Imagery; Infiltration; Laboratory tests; Monitoring; Nondestructive tests; Physical distribution; Reinforcing bars; Technology; Tomography
• Uncontrolled Terms: Data; Rebars
• Old TRIS Terms: Images
• Subject Areas: Bridges and other structures; Design; Freight Transportation; Highways; I24: Design of Bridges and Retaining Walls;

Filing Info

• Accession Number: 00725894
• Record Type: Publication
• Files: TRIS
• Created Date: Sep 16 1996 12:00AM