DETERMINATION OF ASPHALT CONTENTS IN BITUMINOUS PAVEMENTS BY NEUTRON SCATTERING

THIS REPORT DESCRIBES THE DEVELOPMENT OF A NEUTRON SCATTERING METHOD FOR THE DETERMINATION OF ASPHALT CONTENT IN HOT BITUMINOUS PAVING MIXTURES. THE REPORT INCLUDES THEORETICAL CONSIDERATIONS, MATHEMATICAL RELATIONSHIPS, AND RESULTS OF LABORATORY AND FIELD TESTS. THE TEST RESULTS VERIFY A SEMI-LOGARITHMIC STRAIGHT LINE RELATION BETWEEN COUNT READINGS AND ASPHALT CONTENT, AS DETERMINED BY EXTRACTION TESTS. THE VARIABLES STUDIED INCLUDED TYPE AND GRADE OF ASPHALT, MIXTURE TYPE, MOISTURE CONTENT, SAMPLE SIZE AND METHOD OF COMPACTION. IN THE FINAL TEST METHOD, SAMPLES OF HOT, LOOSE MIXTURE WERE PLACED IN A 16 IN. DIAM. BY 10 IN. HIGH CYLINDRICAL CONTAINER WITH A HOLE IN THE CENTER TO RECEIVE THE PROBE OF A COMMERCIAL NUCLEAR GAGE /NUCLEAR CHICAGO MODEL P-19/. IT WAS FOUND THAT, WITH A FOUR -MINUTE COUNTING PERIOD, ASPHALT CONTENTS WITH AN AVERAGE ERROR OF LESS THAN 0.1 PERCENT, COULD BE OBTAINED IN ABOUT TEN MINUTES. /BPR/

• Supplemental Notes:
  • Hpr-1/1/, BPR ITEM 7, STATE 62-02-2
• Corporate Authors:

  University of Oklahoma, Norman

  660 Parrington Oval
  Norman, OK  United States  73019-0390
• Authors:
  • Bonilla, V
  • Laguros, J G
  • Reid, G W
• Publication Date: 1965-9

Subject/Index Terms

• TRT Terms: Asphalt; Asphalt content; Bituminous mixtures; Chemical analysis; Compaction; Development; Field tests; Hot mix asphalt; Laboratory tests; Mathematical analysis; Methodology; Moisture content; Neutrons; Nuclear density gauges; Resource extraction; Scattering; Slopes; Statistical sampling; Testing
• Uncontrolled Terms: Extraction (Chemistry); Grades; Neutron scattering; Sample size
• Old TRIS Terms: Types
• Subject Areas: Data and Information Technology; Highways; Materials;

Filing Info

• Accession Number: 00210335
• Record Type: Publication
• Source Agency: Bureau of Public Roads /US
• Files: TRIS
• Created Date: Feb 1 1994 12:00AM