A REVIEW OF THE INTERPRETATION OF SHELL HIGH FREQUENCY DYNAMIC TEST DATA FROM D.H.O. EXPERIMENTAL PAVEMENTS AT BRAMPTON

THREE SETS OF WAVE PROPAGATION MEASUREMENTS BY SHELL HIGH FREQUENCY DYNAMIC TESTER HAVE BEEN COMPLETED ON THE EXPERIMENTAL PAVEMENTS OF D. H. O. AT BRAMPTON, ONTARIO. THE EXPERIMENTAL DATA GIVES RISE TO THE FOLLOWING GENERAL CONCLUSIONS: (1) THE STIFFNESS OF UNBOUND LAYERS, IN TERMS OF THE DYNAMIC MODULI, APPEARS TO BE LOWEST IN MAY DURING OR AFTER THE SPRING "BREAK-UP" PERIOD. SUBSTANTIAL INCREASES IN MODULI WERE OBSERVED IN OCTOBER. (2) THE MEASUREMENTS IN MARCH, PERFORMED UNDER FROZEN CONDITIONS, GAVE NO CLEAR DIFFERENTIATION BETWEEN DIFFERENT UNBOUND LAYERS. HOWEVER, THE AVAILABLE RESULTS INDICATE HIGHER MODULI FOR THE BASE MATERIALS WHEN FROZEN. (3) ALTHOUGH THE TEMPERATURE VARIATIONS IN ASPHALTIC LAYERS WERE RATHER SMALL FROM ONE SET OF MEASUREMENTS TO THE OTHER, THE MODULI DISPLAY CLEARLY THEIR TEMPERATURE DEPENDENCY. /RATAOC/

  • Supplemental Notes:
    • Rr Orc-70/5,41 PP, 14 FIG, 10 TAB, 2 APP
  • Corporate Authors:

    Shell Canada Ltd, Oakville /Canada

    ,    
  • Authors:
    • Kopvillem, O
  • Publication Date: 1970-4

Subject/Index Terms

Filing Info

  • Accession Number: 00205451
  • Record Type: Publication
  • Source Agency: Roads & Transportation Assoc /Canada
  • Files: TRIS
  • Created Date: Sep 27 1971 12:00AM