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

ULTRASONIC EQUIPMENT WAS EVALUATED AS TO PERFORMANCE FOR MEASURING PAVEMENT THICKNESS. THE EQUIPMENT USED WAS A SONISCOPE AND AN ASSOCIATED FREQUENCY GENERATOR AND COUNTER FOR DETERMINING RESONANT FREQUENCY THROUGH THE DEPT OF THE PAVEMENT SLAB. IT WAS CONCLUEDED THAT THE EQUIPMENT WAS NOT SATISFACTORY 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 IN 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 CONSTRUCTION. 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 VELOCITY WHEN THE PULSE MEASURING PATH CROSSES THE STEEL AS WOULD USUALLY BE THE CASE IN REINFORCED CONCRETE COLUMNS, SLABS AND BEAMS. /AUTHOR/

• Supplemental Notes:
  • 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  United States  47907-1284
• Authors:
  • Scholer, C F
• Publication Date: 1970-7

Subject/Index Terms

• TRT Terms: Highways; Measuring instruments; Pavements; Performance; Thickness; Ultrasonic tests
• Uncontrolled Terms: Pavement thickness
• Subject Areas: Geotechnology; Highways; Materials; Pavements;

Filing Info

• Accession Number: 00217069
• Record Type: Publication
• Files: TRIS
• Created Date: Apr 18 1971 12:00AM