FINAL REPORT TO THE STATE OF NEW YORK DEPARTMENT OF PUBLIC WORKS - FLEXIBLE BASE COURSE PERFORMANCE STUDY

THIS REPORT SUPPLEMENTS AMERICAN OIL COMPANY MEMORANDUM M66-173, DATED AUGUST 3, 1966. THE EARLIER REPORT OUTLINED OBJECTIVES FOR AN INVESTIGATION TO DETERMINE, IN THE LABORATORY, THE LAYER EQUIVALENCY FACTOR FOR A NEW YORK PAVEMENT DESIGN, PRESENTED DETAILS OF THE CONSTRUCTION OF THE TEST SECTION AND REPORTED TRAFFIC RESPONSE CHARACTERISTICS DURING THE INITIAL 1,000,000 WHEEL PASSES OF THE LABORATORY MACHINE. THE CURRENT REPORT SUMMARIZES DATA ON THE NUMBER OF WHEEL PASSES REQUIRED TO PUMP THE CLAY SUBGRADE, PERIODIC CENTER SLAB DEFLECTIONS, PERIODIC SURFACE DISTORTIONS RESULTING FROM SUBGRADE SOIL COMPACTION AND FLOW BENEATH THE WHEELPATH AREA AND THE PAVEMENT CRACKING WHICH THE TRAFFIC AND PUMPING ACTIONS PRODUCED. TRAFFIC RESPONSE OF THE NEW YORK DESIGN ARE COMPARED WITH THOSE OF FOUR OF THE ELEVEN AMERICAN OIL COMPANY LAYER EQUIVALENCY DESIGNS INCLUDED IN THE TEST SET. THE NEW YORK BASE IS A TWO LAYER GRANULAR DESIGN OF 12 INCHES GRAVEL AND 2 1/2 INCHES CRUSHED STONE. AT 14 1/2 INCHES, IT IS THE DEEPER AND STRONGER SECTION OF THE TEST SET. ITS PERFORMANCE WAS SOMEWHAT SUPERIOR TO THE STRONGEST AMERICAN OIL DESIGN -- A 4-INCH CRUSHED STONE HOT ASPHALT CONCRETE BASE. DATA PRESENTED IN THIS REPORT SUGGEST A LAYER THICKNESS EQUIVALENCY OF APPROXIMATELY 3 FOR NEW YORK'S UNTREATED GRAVEL AND STONE AND AMERICAN'S ASPHALT CONCRETE BASES. FOR THIS REPORT, LAYER EQUIVALENCY IS DEFINED TO BE THE MULTIPLYING FACTOR USED TO CONVERT ASPHALT CONCRETE BASE THICKNESS TO ANOTHER BASE TYPE HAVING THE SAME POTENTIAL SERVICEABILITY. /AUTHOR/

  • Supplemental Notes:
    • Hpr-1/2/, BPR 23, STATE 26-2
  • Corporate Authors:

    New York State Department of Transportation

    1220 Washington Avenue
    Albany, NY  United States  12232

    American Oil Company

    Research and Development Department
    Whiting, Indiana,   United States  46394
  • Authors:
    • Speer, T L
  • Publication Date: 1967-9-29

Subject/Index Terms

Filing Info

  • Accession Number: 00206321
  • Record Type: Publication
  • Source Agency: Bureau of Public Roads /US
  • Files: TRIS, STATEDOT
  • Created Date: Apr 2 1994 12:00AM