PERFORMANCE OF ULTRASONIC EQUIPMENT FOR PAVEMENT THICKNESS MEASUREMENT AND OTHER HIGHWAY APPLICATIONS

THE EVALUATION OF EQUIPMENT FOR PAVEMENT THICKNESS MEASUREMENTS IS REPORTED. THE EQUIPMENT USED WAS A SONISCOPE AND AN ASSOCIATED FREQUENCY GENERATOR AND COUNTER FOR DETERMINING RESONANT FREQUENCY THROUGH THE DEPTH OF THE PAVEMENT SLAB. IT WAS CONCLUDED THAT THE EQUIPMENT IS NOT SATISFACORY FOR MEASURING PAVEMENT THICKNESS. IN CONSIDERING OTHER APPLICATIONS IT WAS FOUND TO BE USEFUL IN DETERMINING THE CONTINUITY OF CONCRETE IN A STRUCTURE SUCH AS A SURVEY OF A BRIDGE DECK TO DETERMINE AREAS WITH DETERIORATED CONCRETE OR INCIPIENT SPALLING. USE OF PULSE VELOCITY FOR EVALUATING QUALITY OF FRESH CONCRETE WAS INVESTIGATED AND WAS NOT FOUND PROMISING FOR PRACTICAL CONTROL OF CONCRETE IN CONSTRUCTIONS. A LABORATORY INVESTIGATION OF THE EFFECT REINFORCING STEEL HAS ON PULSE VELOCITY MEASUREMENTS WAS CONDUCTED WITH STEEL VARYING FROM 0 TO 6 PERCENT OF THE VOLUME. IT WAS CONCLUDED THAT REINFORCING STEEL DOES NOT INFLUENCE PULSE VEOLICTY WHEN THE PULSE MEASURING PATH CROSSES THE STEEL AS WOULD USUALLY BE THE CASE IN REINFORCED CONCRETE COLUMNS, SLABS AND BEAMS. /AUTHOR/

  • Supplemental Notes:
    • Final ReporT, NO 16, 34 PP, 8 FIG, 9 TAB, 15 REF
  • Corporate Authors:

    Purdue University/Indiana Department of Transportation JHRP

    Purdue University, School of Civil Engineering
    West Lafayette, IN  USA  47907-1284
  • Authors:
    • Scholer, C F
  • Publication Date: 1970-7

Subject/Index Terms

Filing Info

  • Accession Number: 00213998
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Sep 13 1971 12:00AM