STUDY OF BITUMINOUS SURFACE TREATMENTS IN VIRGINIA - PHASE II

TEN BITUMINOUS DISTRIBUTORS AND TEN CHIP SPREADING OPERATIONS WERE INVESTIGATED TO DETERMINE THE DISTRIBUTION CHARACTERISTICS OF MATERIALS. A WIDE VARIATION WAS FOUND IN THE COVERAGE CONSISTENCY OF THE DISTRIBUTORS AND THE AGGREGATE DISTRIBUTION WAS FOUND TO VARY BETWEEN TYPES OF SPREADERS USED. TO DETERMINE THE EFFECTIVENESS OF ONE SIZE AGGREGATES, SEVEN ONE SIZE STONE TEST SECTIONS WERE PLACED ON PORTIONS OF REGULARLY SCHEDULED SURFACE TREATMENT PROJECTS. MODIFIED #8 AND #78 STONES WERE PLACED WITH THREE DIFFERENT TYPES OF CHIP SPREADERS AND IN DIFFERENT COMBINATIONS WITH CAE-2, RC-2, AP-00, AND RC-3 ASPHALTS. THE QUANTITIES OF STONE AND BINDER WERE DETERMINED THROUGH A MODIFICATION OF A DESIGN METHOD DEVELOPED BY F. M. HANSEN OF NEW ZEALAND. INSUFFICENT TIME HAS PASSED TO PERMIT FINAL EVALUATION OF THE TEST SECTIONS. SETTING TIME, OR TRAFFIC READINESS WAS STUDIED BY A CENTRIFUGE TEST FASHINED AFTER ONE USED IN CALIFORNIA WAS USED TO EVALUATE LAB AND FIELD TREATMENTS FOR AGGREGATE WHIP OFF. FROM THE RESULTS OF THIS EMPIRICAL TEST, WHICH IS PROBABLEY MUCH MORE SEVERE THAN TRAFFIC AT MODERATE SPEEDS, IT IS BELIEVED THAT AP-00 ASPHALT IS TRAFFIC READY IN A MUCH SHORTER PERIOD OF TIME THAN ARE CUTBACKS AND EMULSIONS. /AUTHOR/

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• Record URL:
  https://rosap.ntl.bts.gov/view/dot/19506
• Corporate Authors:

  Virginia Highway Research Council

  Charlottesville, VA  United States 

  Virginia Department of Highways

  Richmond, VA  United States  23219

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Mahone, D
• Publication Date: 1970

Subject/Index Terms

• TRT Terms: Aggregates; Bitumen; Bituminous materials; Chippings; Physical distribution; Setting (Concrete); Spreaders; Surface treating; Tank trucks
• Uncontrolled Terms: Setting time
• Old TRIS Terms: Bituminous distributor; Bituminous surface treatments; Chips
• Subject Areas: Freight Transportation; Geotechnology; Highways; Maintenance and Preservation;

Filing Info

• Accession Number: 00218063
• Record Type: Publication
• Source Agency: Federal Highway Administration
• Files: NTL, TRIS, USDOT, STATEDOT
• Created Date: Aug 8 1971 12:00AM