PHASE C OF PAVEMENT DESIGN AND PERFORMANCE STUDIES- EXPERIMENTAL FLEXIBLE PAVEMENTS

THE FIRST EXPERIMENTAL FLEXIBLE PAVEMENT IN VIRGINIA WAS CONSTRUCTED ON ROUTE 58 NEAR SOUTH BOSTON, AND WAS OPENED TO TRAFFIC IN 1958. SINCE THAT TIME, TWO ADDITIONAL MAJOR EXPERIMENTAL FLEXIBLE PAVEMENTS HAVE BEEN BUILT, ONE ON ROUTE 360 BETWEEN KEYSVILLE AND MEHERRIN, AND THE LATEST ON ROUTE 360--THE KEYSVILLE BYPASS. ALSO, ONE EXPERIMENTAL PROJECT WAS BUILT ON A LIGHT-TRAFFIC PRIMARY--ROUTE 20 NORTH OF BARBOURSVILLE. THE PURPOSE OF THIS EXPERIMENTAL PROGRAM IS TO FACILITATE PERFORMANCE COMPARISONS, WITHIN A SINGLE PROJECT, OF SEVERAL PAVEMENT DESIGNS BUILT BY THE SAME CONTRACTOR AND SUBJECTED TO THE SAME TRAFFIC AND ENVIRONMENTAL CONDITIONS. IN ORDER TO PROVIDE AN ADEQUATE BACKGROUND OF THIS STUDY, A BRIEF HISTORY OF THE PAST PERFORMANCE OF THE FIRST TWO PROJECTS AND A MORE DETAILED DISCUSSION OF THEIR PRESENT PERFORMANCE ARE GIVEN. PROGRESS REPORTS NUMBER ONE AND NUMBER THREE PROVIDE DETAILED INSTALLATION DATA ON THESE TWO PROJECTS. THIS IS FOLLOWED BY AN INSTALLATION REPORT ON THE KEYSVILLE BYPASS PROJECT. A VERY BRIEF DISCUSSION OF THE ROUTE 20 PROJECT IS PRESENTED. THE REPORT ALSO INCLUDES THE DEVELOPMENT OF AN EQUATION TO ESTIMATE BENKELMAN BEAM DEFLECTIONS FROM DYNAFLECT TEST RESULTS. THE FOLLOWING PRINCIPAL CONCLUSIONS ARE REPORTED: (1) SOUTH BOSTON - WHEN RESILIENT SUBGRADES ARE ENCOUNTERED, THE RESILIENCY SHOULD BE COUNTERACTED IN THE LAYER IN WHICH IT EXISTS AND NOT BY STRENGTHENING THE LAYERS ABOVE, (2) KEYSVILLE - MEHERRIN - PAVEMENT HAVING A CEMENT-TREATED CRUSHED STONE SUBBASE PERFORMED BETTER THAN THAT HAVING UNTREATED CRUSHED AGGREGATE SUBBASE, AND SEVEN INCHES OF ASPHALT CONCRETE PERFORMED MUCH BETTER THAN 3 INCHES OF ASPHALT CONCRETE PLUS 4 INCHES OF CEMENT TREATED AGGREGATE, (3) THE KEYSVILLE BYPASS AND BARBOURSVILLE - PAVEMENTS ARE TOO YOUNG TO PRODUCE IMPORTANT CONCLUSIONS, AND (4) TO COMPARE DYNAFLECT TEST RESULTS WITH BENKELMAN BEAM DEFLECTIONS THE GENERAL EQUATION, BB=27.8 D, MAY BE USED. /BPR/

  • Supplemental Notes:
    • Hpr-1/3/, BPR-5, STATE-0356
  • Corporate Authors:

    Virginia Highway Research Council

    Charlottesville, VA  United States 

    Bureau of Public Roads /US

    400 7th Street, SW
    Washington, DC  United States  20590
  • Authors:
    • Hughes, C S
  • Publication Date: 1968-2

Subject/Index Terms

Filing Info

  • Accession Number: 00206339
  • Record Type: Publication
  • Source Agency: Bureau of Public Roads /US
  • Files: TRIS
  • Created Date: Dec 6 1994 12:00AM