VOIDS, PERMEABILITY, AND FILM THICKNESS RELATED TO ASPHALT HARDENING

THE POSSIBILITY OF USING AIR PERMEABILITY MEASUREMENTS AS CONTROL FACTORS IN THE DESIGN OF BITUMINOUS MIXTURES WAS INVESTIGATED DURING THE STUDY REPORTED IN THIS ARTICLE. ALTHOUGH AIR PERMEABILITY AS A POSSIBLE CONTROL FACTOR IN BITUMINOUS PAVEMENT COMPACTION ALSO IS OF INTEREST TO HIGHWAY ENGINEERS, THIS INVESTIGATION WAS LIMITED ONLY TO THE EFFECT OF AIR PERMEABILITY ON THE COMPOSITION OF BITUMINOUS MIXTURES. THE AUTHORS OBTAINED NO CONFIRMATION THAT AIR PERMEABILITY MEASUREMENTS SHOULD BE A FACTOR IN THE DESIGN OF BITUMINOUS MIXTURES. THEY DID, HOWEVER, DETERMINE THAT A CRITERION BASED ON A COMBINATION OF /1/ THE THICKNESS OF THE ASPHALT COATING ON THE AGGREGATE PARTICLES AND /2/ THE AIR VOID CONTENT OF THE BITUMINOUS MIXTURE SHOULD PROVIDE A DESIGN FOR A MORE SERVICEABLE MIXTURE. BITUMINOUS MIXTURES DESIGNED ACCORDING TO THIS CRITERION SHOULD NOT BE SO SUBJECT TO EARLY PAVEMENT FAILURE CAUSED BY EXCESSIVE HARDENING OF THE ASPHALT DURING SERVICE. /NAPA/

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  • Supplemental Notes:
    • Vol33, No10, PP214-223. Also published in the Association of Asphalt Paving Technologists Proceedings, Vol 34, 1965.
  • Authors:
    • Goode, J F
    • Lufsey, L A
  • Publication Date: 1965-10

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  • Accession Number: 00210304
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Aug 12 2002 12:00AM