ELECTRICAL RESISTIVITY INSTRUMENTS FOR MEASURING THICKNESS AND OTHER CHARACTERISTICS OF PAVEMENT LAYERS

THIS REPORT DESCRIBES THE USE OF THE ELECTRICAL RESISTIVITY TEST AS A NON-DESTRUCTIVE TEST FOR THE DETERMINATION OF PAVEMENT THICKNESS AND DEPTH TO REINFORCING STEEL. APPROXIMATELY 600 RESISTIVITY TESTS WERE PERFORMED ON CONCRETE PAVEMENTS--BOTH PLAIN AND REINFORCED--AND ON BRIDGE DECKS. THE DATA OBTAINED WERE COMPARED TO CORE LENGTH MEASUREMENTS FOR THE PAVEMENT SECTIONS AND DESIGN PARAMETERS FOR THE BRIDGE DECKS. RESULTS INDICATED THAT THE RESISTIVITY TEST PROVIDES ACCURACIES WITHIN 1 TO 2 PERCENT ON THE AVERAGE OF CORE LENGTH MEASUREMENTS FOR PAVEMENT THICKNESS DETERMINATION. THIS TEST WAS ALSO DEMONSTRATED TO BE PRACTICAL FOR DETERMINING THE DEPTH TO REINFORCING STEEL. THE ABILITY TO DETECT THE TOP AND BOTTOM STEEL MATS AND THICKNESS OF BRIDGE DECKS WAS ALSO DEMONSTRATED BUT NO CORES WERE AVAILABLE TO DETERMINE THE PRECISE ACCURACIES OF THE MEASUREMENTS. OTHER RESULTS REPORTED WERE THE FAVORABLE ASPECT OF THE RESISTIVITY TEST WHICH ALLOWED MEASUREMENTS ON FRESH, PLASTIC CONCRETE; DEMONSTRATION OF A TREND INDICATING THAT THE MEASURED RESISTIVITY VALUES WERE RELATED TO THE COMPRESSIVE STRENGTH OF THE CONCRETE; AND THE APPARENT MERIT OF A NEW AND FASTER TEST METHOD, NATURAL ELECTRICAL POTENTIAL, FOR DETERMINING PAVEMENT THICKNESS AND DEPTH TO REINFORCING STEEL. /FHWA/

  • Corporate Authors:

    Federal Highway Administration

    Office of Research and Development, 1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • Moore, R W
  • Publication Date: 1972-8

Media Info

  • Pagination: 54 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00208105
  • Record Type: Publication
  • Source Agency: Federal Highway Administration
  • Report/Paper Numbers: FHWA-RD-73- 2 Final Rpt., FCP 24F6-023
  • Files: TRIS, USDOT
  • Created Date: May 15 1976 12:00AM