A STUDY OF STRIPPING IN ASPHALT PAVEMENTS

A VARIETY OF TECHNIQUES FOR STUDYING THE STRIPPING OF ASPHALT FROM AGGREGATE-LIKE SUBSTRATES WERE DEVELOPED IN THE COURSE OF THIS INVESTIGATION. PEEL TESTS WERE USED TO EXTEND AND AMPLIFY PREVIOUSLY REPORTED STRIPPING STUDIES AND SUCCEEDED IN ELUCIDATING THIN FILM EFFECTS. THESE EFFECTS WERE STUDIED BY OBSERVING THE RETRACTION OF ASPHALTS IN CAPILLARY SPACES AND WERE MODIFIED TO DEMONSTRATE HOW ASPHALT WOULD READHERE TO SUBSTRATES, EVEN IN THE PRESENCE OF WATER. A DETACHMENT TEST WAS DEVELOPED TO UTILIZE THE THIN FILM RETRACTION FOR A REALISTIC TEST OF THE EFFECTS OF PAVEMENT VARIABLES ON STRIPPING. FROM THE USE OF THIS TEST A CHEMICAL EFFECT ON STRIPPING EMERGED IN CONFIRMATION OF PREVIOUSLY REPORTED EFFECTS. IT WAS STUDIED BY MORE PRECISE LAP JOINT STRENGTH MEASUREMENTS AND THE EXAMINATION OF AGING INTERFACES BY INFRARED, SURFACE TENSION, AND THERMOANALYTICAL TECHNIQUES. THE EFFECTS OF DIFFERENT FACTORS ON STRIPPING RATE WERE DESCRIBED, AND A GENERAL OVERVIEW OF THE STRIPPING PROCESS WAS EVOLVED. AFTER THE ESTABLISHMENT OF A THREE PHASE SYSTEM (ASPHALT, WATER, AGGREGATE) BY ONE OF A NUMBER OF POSSIBLE MECHANICAL PROCESSES, INCLUDING RETRACTION, DETACHMENT PROBABLY PROGRESSES BY A MECHANISM AKIN TO SPONTANEOUS EMULSIFICATION OF THE ASPHALT INTERFACE BY WATER. /RATAOC/

  • Supplemental Notes:
    • Rr 177, 38 PP, 22 FIG, 17 TAB, 12 REF, 2 APP
  • Corporate Authors:

    Ontario Dept Transp & Communications

    ,    
  • Authors:
    • Brown, E C
    • Kuntze, R A
  • Publication Date: 1972-3

Subject/Index Terms

Filing Info

  • Accession Number: 00210599
  • Record Type: Publication
  • Source Agency: Roads & Transportation Assoc /Canada
  • Files: TRIS
  • Created Date: Jan 23 1973 12:00AM