Asphalt Content by Ignition Round Robin Study

Details

• Creators:
  Brown, E.R. ; Mager, Stuart
• Subject/TRT Terms:
  Asphalt Content Ignition Testing Materials Tests 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.
  
  
• Format:
  PDF
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:0d80d572f5707e016ad6d3341fd3310d51f217d836c8c7ed0da106835f63ec23
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/13186/dot_13186_DS1.pdf
• File Type:
  [PDF - 170.03 KB ]