HOT MIX ASPHALT MIX DESIGN EVALUATION USING THE CORELOCK VACUUM-SEALING DEVICE

The bulk specific gravity (BSG) of compacted hot mix asphalt (HMA) specimens is the basis for volumetric property calculations during mix design and quality control and assurance. For many years, the BSG measurement has been accomplished by water replacement procedures. Water displacement yields accurate BSG measurement for most conventional dense graded mixes, but BSG measurement errors using water displacement have been observed for courser graded mixes. This study's objectives were to illustrate BSG differences between water displacement and Corelock procedures and resulting changes in volumetric properties and design asphalt contents. Results indicate significant BSG differences between Corelock and water displacement procedures, with the Corelock procedure yielding slightly higher BSG values, resulting in an average increase in design asphalt content and voids in the mineral aggregate of 0.29 and 0.64%, respectively, relative to water displacement procedures.

Language

  • English

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Filing Info

  • Accession Number: 00989471
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Apr 2 2005 12:00AM