THE COMPACTION OF ASPHALTIC CONCRETE ON THE ROAD-PART II

THE FIRST REPORT OF THIS STUDY DETERMINED THAT THE MOST EFFICIENT TYPE OF ROLLING SEQUENCE FOR THE COMPACTION OF BITUMINOUS CONCRETE WAS ONE THAT UTILIZED A STEEL ROLLER FOR BREAKDOWN ROLLING, A PNEUMATIC-TIRED ROLLER FOR INTERMEDIATE ROLLING AND A STEEL ROLLER FOR FINISHING. THIS SECOND AND FINAL PHASE OF THE STUDY, CONDUCTED ON FOUR CONTRACTS IN THE PROVINCE OF ONTARIO, UTILIZED THIS PARTICULAR ROLLING SEQUENCE TO DETERMINE THE EFFECTS ON COMPACTION OF INTERMEDIATE ROLLER SIZE, AND TIRE SIZE AND PRESSURE. THE TIRE PRESSURE WAS VARIED AND THE EFFECTS ON THE PER CENT COMPACTION ACHIEVED WERE DETERMINED. ALL RESULTS WERE ANALYZED BY STATISTICAL TECHNIQUES AND CONCLUSIONS WERE DRAWN AT A SIGNIFICANT PROBABILITY LEVEL. IT WAS FOUND THAT LIGHT ROLLERS WITH 7.50 X 15 TIRES LOADED TO 2000 POUNDS PER WHEEL AND WORKING AT 55 PSI TIRE PRESSURE, ACHIEVED 97% COMPACTION ONLY ON EASY TO COMPACT BITUMINOUS MIXTURES. MEDIUM SIZE PNEUMATIC-TIRED ROLLERS EQUIPPED WITH 9.00 X 20 TIRES AND LOADED TO 4,000 POUNDS PER WHEEL ACHIEVED THE REQUIRED DEGREE OF COMPACTION ON ALL BUT THE MOST DIFFICULT TO COMPACT BITUMINOUS MIXTURES INVESTIGATED. THE PERFORMANCE OF THESE ROLLERS WAS AFFECTED BY TIRE PRESSURE, 100 PSI SEEMED TO BE THE BEST PRESSURE. LARGE PNEUMATIC-TIRED ROLLERS EQUIPPED WITH 13.00 X 24 TIRES AND LOADED TO 8000 POUNDS PER WHEEL PRODUCED SATISFACTORY COMPACTION ON THE MIXTURES INVESTIGATED AND THEIR PERFORMANCE WAS NOT AFFECTED BY TIRE PRESSURE. A TIRE PRESSURE OF 60 PSI PROVED SUITABLE FOR ALL THE CONTRACTS STUDIED. /CGRA/

  • Supplemental Notes:
    • Report No RB 113, 23 PP, 5 FIG, 15 TAB, 3 REF
  • Corporate Authors:

    Ontario Department of Highways

    1201 Wilson Avenue
    Toronto, Ontario M3M 1J8,   Canada 
  • Authors:
    • Fromm, H J
    • Phang, W A
  • Publication Date: 1966-2

Subject/Index Terms

Filing Info

  • Accession Number: 00210560
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Oct 17 1994 12:00AM