LONG-TERM COMPACTION OF ASPHALT CONCRETE PAVEMENTS

FIFTEEN FIELD TEST SITES WERE SELECTED IN TEXAS IN AN ATTEMPT TO DEFINE MORE ACCURATELY THE INFLUENCE OF MATERIAL PROPERTIES, MIX DESIGN, WEATHER CONDITIONS, AND TRAFFIC ON THE LONG-TERM DENSITY GAIN OF PAVEMENTS. ASPHALT CORES OBTAINED FROM THESE TEST SECTIONS OVER A 2-YEAR PERIOD INDICATE THAT THE MAJORITY OF THESE MIXES WERE COMPACTED TO AN AIR VOID CONTENT WITHIN 2 TO 3 PERCENTAGE POINTS OF EACH OTHER REGARDLESS OF THE COMPACTIVE EFFORT EMPLOYED, AND THE RESULTING DENSITIES AFTER 2 YEARS OF SERVICE ARE WITHIN A RANGE OF 1 OR 2 PERCENTAGE POINTS OF EACH OTHER REGARDLESS OF THE POSTITION OF THE CORE WITH RESPECT TO THE WHEELPATHS OF THE TRAFFIC. SAMPLES OF FIELD MIXTURES WERE COMPACTED IN THE LABORATORY BY USE OF THE TEXAS GYRATORY COMPACTOR, AND THESE RESULTS ARE COMPARED WITH THE DENSITY OBTAINED IN THE FIELD. THESE RESULTS SHOW THAT 85 PERCENT OF THE SAMPLES DID NOT OBTAIN 95 PERCENT OF THE LABORATORY DENSITY DURING CONSTRUCTION. AFTER ONE WEEK OF TRAFFIC, APPROXIMATELY 50 PERCENT OF THE SECTIONS HAD REACHED 95 PERCENT OF LOABORATORY DENSITY, AND AFTER 4 MONTHS, 80 PERCENT HAD REACHED 95 PERCENT LABORATORY COMPACTION. TWO YEARS OF SERVICE RESULTED IN ALL EXCEPT TWO IF THE TEST SITE PAVEMENTS REACHING GREATER THAN 95 PERCENT RELATIVE COMPACTION, AND ONLY 20 PERCENT REACHED 100 PERCENT RELATIVE COMPACTION./AUTHOR/

Media Info

  • Media Type: Print
  • Features: Figures; References; Tables;
  • Pagination: pp 79-91
  • Monograph Title: Bituminous materials, mixes and compaction
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00211565
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Oct 26 1970 12:00AM