DEVELOPMENT OF NUCLEAR DENSITY TESTS FOR HOT ASPHALT PAVEMENT

DEVELOPMENT OF A NONDESTRUCTIVE TEST METHOD FOR DENSITY MEASUREMENTS OF HOT ASPHALT CONCRETE IN THE FIELD USING PORTABLE NUCLEAR INSTRUMENTATION IS DESCRIBED. ALSO DESCRIBED ARE EFFECTS TO UTILIZE EXISTING NUCLEAR DENSITY PROBES DESIGNED FOR TESTING SOIL TO MEASURE THE COMPACTED DENSITY OF HOT ASPHALT PAVEMENT. A PROTOTYPE NUCLEAR ASPHALT DENSITY PROBE WAS DEVELOPED. AFTER TESTING THE PROTOTYPE ON TEST SECTIONS WITH DENSITIES FROM 110 TO 144 PCF, A PRODUCTION MODEL ASPHALT DENSITY PROBE WAS DESIGNED AND BUILT. HEAT-RESISTANT ELECTRONICS ALLOWED DENSITY TESTS TO BE PERFORMED ON MATERIAL RANGING IN TEMPERATURE FROM COLD TO 300 F. SOURCE TYPE AND STRENGTH, AS WELL AS SOURCE-TO- DETECTOR GEOMETRY, WERE OPTIMIZED SO THAT DEPTH OF PENETRATION WAS RESTRICTED TO APPROXIMATELY 1 3/4 TO 2 IN., ALLOWING TESTING OF THIN ASPHALT SURFACE COURSES WITHOUT BASE COURSE INFLUENCE. COMPARISON DATA AND COMPACTION GROWTH CURVES FROM VARIOUS ROLLER PATTERNS SET IN THE FIELD USING THE ASPHALT DENSITY PROBE ARE INCLUDED. TEST RESULTS WERE AVAILABLE WITHIN 2 1/2 MIN AFTER EACH ROLLER PASS. /AUTHOR/

• Record URL:
  http://onlinepubs.trb.org/Onlinepubs/hrr/1966/107/107-003.pdf
• Supplemental Notes:
  • Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved.
• Authors:
  • Brown, Wayne R
• Publication Date: 1966

Media Info

• Media Type: Digital/other
• Features: Figures; Tables;
• Pagination: pp 25-36
• Monograph Title: Nuclear applications
• Serial:
  • Highway Research Record
  • Issue Number: 107
  • Publisher: Highway Research Board

Subject/Index Terms

• TRT Terms: Alternatives analysis; Asphalt concrete; Compaction; Control; Density; Depth; Development; Hot mix asphalt; Measurement; Measuring instruments; Nondestructive tests; Nuclear tests; Pendulum tests; Portable equipment; Prototype tests; Soil tests; Test sections
• Uncontrolled Terms: Data
• Old TRIS Terms: Density measurement; Nuclear testing
• Subject Areas: Geotechnology; Highways; Materials;

Filing Info

• Accession Number: 00215794
• Record Type: Publication
• Files: TRIS, TRB
• Created Date: Nov 18 1994 12:00AM