Asphalt Content by Ignition Round Robin Study

Details

• Creators:
  Brown, E.R. ; Mager, Stuart
• Subject/TRT Terms:
  • Asphalt content
  • Materials tests
  • ignition testing
  • weight gradiation analysis
• DOI:
  https://doi.org/10.21949/1404491
• Resource Type:
  Tech Report
• Geographical Coverage:
  Alabama;United States
• TRIS Online Accession Number:
  00724572
• Corporate Publisher:
  National Center for Asphalt Technology (U.S.)
• NTL Classification:
  NTL-HIGHWAY/ROAD TRANSPORTATION-Materials ; NTL-HIGHWAY/ROAD TRANSPORTATION-Pavement Management and Performance
• Abstract:
  The National Center for Asphalt Technology (NCAT) has developed a test method to ; determine the asphalt content of hot mix asphalt (HMA) mixtures by ignition. In ; the ignition method, a HMA sample is subjected to 5380C (lOOO0F) in a furnace to ; ignite and burn the asphalt cement from the aggregate. The difference in weight ; of the sample before and after ignition is used to determine the asphalt content ; of the mixture. The aggregate recovered after ignition testing may then be used ; for gradation analysis. ; A round robin study was completed by NCAT to determine the accuracy and ; precision of the ignition method. This paper discusses the round robin test ; program and the accuracy and precision values determined for the measured ; asphalt content and gradation by the ignition method. Equipment developed for ; the procedure was purchased by NCAT with funds provided by the Federal Highway ; Administration (FHWA), National Asphalt Pavement Association (NAPA), NAPA ; Research and Education Foundation, and the Alabama Department of Transportation ; (ADOT). The equipment was provided along with laboratory prepared HMA samples ; to 12 participating laboratories throughout the U. S. Four replicates of four ; HMA mixtures containing different aggregates types, gradations and asphalt ; contents were provided for testing. ; The results of the round robin study show that the ignition method can ; accurately measure the AC content of HMA mixtures with greater precision than ; solvent extraction methods without significantly affecting the gradation of the ; aggregate. This test method has shown excellent potential for replacing ; existing test methods for measuring asphalt content.
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• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/13186/dot_13186_DS1.pdf
• File Type:
  [PDF - 170.03 KB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:0d80d572f5707e016ad6d3341fd3310d51f217d836c8c7ed0da106835f63ec23