AGGREGATE RETENTION STUDIES OF SEAL COATS

THE BRUSH-METHOD OF DETERMINING THE AMOUNT OF AGGREGATE RETAINED IN LABORATORY PREPARED SEAL COATS WAS DEVELOPED. THIS METHOD WAS USED TO EVALUATE THE INFLUENCE OF THE FOLLOWING FACTORS UPON AGGREGATE RETENTIONS SHOWING THAT /1/ SOURCE OF ASPHALT WAS FOUND TO HAVE LITTLE EFFECT UPON THE RETENTION, /2/ PENETRATION OF ASPHALT REVEALED THAT AS PENETRATION DECREASES THE LOSS BECOMES GREATER, WHICH IS CAUSED BY THE DIFFICULTY IN EMBEDDING THE AGGREGATE IN THE HARDER ASPHALTS, /3/ IN ROLLING THERE IS MARKED IMPROVEMENT IN THE AGGREGATE RETENTION, ESPECIALLY WHEN ASPHALT CEMENTS ARE USED, /4/ TYPE OF LIQUID ASPHALT SHOWED THAT RAPID- CURING CUTBACKS PRODUCED BETTER RETENTION THAN ASPHALT CEMENTS, /5/ AGGREGATE GRADING REVEALED THAT FINE MATERIAL HINDERS THE EMBEDDMENT OF THE AGGREGATE, AND /6/ THE MINIMUM TEMPERATURE PERMITTED AROUND SEAL COAT WORK APPEARED TO BE ABOUT 70 DEGREES F. /AUTHOR/

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Filing Info

  • Accession Number: 00210874
  • Record Type: Publication
  • Files: TRIS
  • Created Date: May 13 1994 12:00AM