CONTROL OF BINDER DISTRIBUTION IN BITUMINOUS SURFACE TREATMENTS

THE CONTROL OF BINDER DISTRIBUTION HAS LONG BEEN A FACTOR OF MAJOR CONCERN TO THOSE RESPONSIBLE FOR BITUMINOUS SURFACE TREATMENT WORK. EXPERIMENTAL WORK WAS CONDUCTED DURING THE SUMMERS OF 1964 AND 1965 IN VIRGINIA WITH THE TROUGH TEST, CUP TEST, AND COTTON PAD TEST IN ORDER TO DETERMINE AND DEFINE REASONABLE VARIABILITY FROM THE SPECIFIED MEAN BINDER APPLICATION RATE BOTH TRANSVERSELY AND LONGITUDINALLY, AND TO PROVIDE A METHOD OF TEST TO BE USED IN END RESULT SPECIFICATIONS FOR THE CONTROL OF BINDER APPLICATION. THE INVESTIGATION WAS LIMITED IN THAT MOST OF THE WORK WAS PERFORMED ON STATE SECONDARY ROADS, AND THE DISTRIBUTORS, MOST OF WHICH WERE STATE-OWNED, WERE THOSE IN USE DURING 1964 AND 1965. IT WAS FOUND THAT THE TROUGH TEST AND CUP TEST WERE NOT SUITED FOR FIELD USE AND, MORE IMPORTANTLY, COULD NOT BE USED FOR ENFORCEMENT OF END RESULT SPECIFICATIONS. THE COTTON PAD TEST WAS FOUND TO BE SUITED FOR FIELD USE, AND CAN BE USED IN END RESULT SPECIFICATIONS. IT WAS FOUND THAT BOTH THE LONGITUDINAL AND TRANSVERSE CONSISTENCY COULD BE CHECKED PERIODICALLY BY RUNNING A COTTON PAD TEST. ALSO, BASED ON THE TESTS MADE, IT WAS DETERMINED THAT FOR THE EQUIPMENT TESTED THE LONGITUDINAL VARIATION SHOULD BE NO MORE THAN PLUS OR MINUS 8 PERCENT FROM THE INTENDED RATE, AND THAT THE TRANSVERSE VARIATION AS INDICATED BY ONE COTTON PAD TEST SHOULD BE 8 PERCENT COEFFICIENT OF VARIATION OR LESS. (IT WAS DECIDED THE COEFFICIENT OF VARIATION WAS THE BEST MEASURE OF TRANSVERSE VARIABILITY.) /AUTHOR/

Media Info

  • Media Type: Print
  • Features: Figures; References; Tables;
  • Pagination: pp 19-28
  • Monograph Title: Surface treatments, skid resistance and aggregates
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00211357
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Nov 15 1994 12:00AM