ASPHALT CONTENT BY NUCLEAR DEVICES

WHILE THE EVALUATION PERFORMED ON THIS PROJECT HAS SHOWN THE TROXLER MODEL AC-20 TO BE A COMPARATIVELY RAPID METHOD OF DETERMINING THE ASPHALT CONTENT OF HOT MIXES IN THE FIELD, THE PRECISION IS A DIRECT FUNCTION OF THE TIME ALLOWED FOR EACH DETERMINATION. ALTHOUGH THE RADIATION DETECTION TIME CAN BE CHOSEN BY THE OPERATOR, BREVITY AND PRECISION ARE INVERSELY PROPORTIONAL. AN IMPROVEMENT IN BOTH OF THESE FEATURES IS ESSENTIAL. DURING THE COURSE OF THE INVESTIGATION, IN CONSULTATION WITH THE MANUFACTURER, SEVERAL IMPROVEMENTS HAVE BEEN MADE OR HAVE BEEN SHOWN TO BE FEASIBLE. THE CONSENSUS OF PROJECT PERSONNEL, AND BUREAU OF PUBLIC ROADS PERSONNEL IS THAT FURTHER IMPROVEMENT IN THIS METHOD MUST BE OBTAINED IF IT IS TO BE ATTRACTIVE AS A SUPPLEMENTARY OR REPLACEMENT METHOD OF DETERMINING ASPHALT CONTENT OF BITUMINOUS HOT MIXES. CERTAIN INHERENT AND TROUBLESOME DISADVANTAGES IN THE METHOD ARE DISCUSSED. /AUTHOR/

• Supplemental Notes:
  • Hpr-1/5/, BPR-22, STATE-65-1B. The University of Southwestern Louisiana is now the University of Louisiana, Lafayette.
• Corporate Authors:

  University of Louisiana, Lafayette

  104 University Circle
  Lafayette, LA  United States  70504
• Authors:
  • Metcalfe, T B
  • Averitt, W K
  • Larue, F L
• Publication Date: 1967-9

Subject/Index Terms

• TRT Terms: Asphalt content; Bituminous mixtures; Hot mix asphalt; Nuclear engineering; Nuclear radiation; Sensors
• Old TRIS Terms: Nuclear applications; Radiation counters /sensors/
• Subject Areas: Construction; Geotechnology; Highways; Materials;

Filing Info

• Accession Number: 00215866
• Record Type: Publication
• Source Agency: Bureau of Public Roads /US
• Files: TRIS
• Created Date: Jan 16 1994 12:00AM