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Columbus Mississippi Field Aging and Laboratory Conditioning Study: Plant Mixed and Field Compacted Asphalt Test Sections
  • Published Date:
    2018-12-01
  • Language:
    English
Filetype[PDF-7.52 MB]


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Columbus Mississippi Field Aging and Laboratory Conditioning Study: Plant Mixed and Field Compacted Asphalt Test Sections
Details:
  • Publication/ Report Number:
  • Resource Type:
  • Edition:
    Final Report, March 2013 to June 2018
  • Abstract:
    The main objective of this report was to characterize the effects of short and long term aging for a full-scale and non-trafficked asphalt test section originally built as part of an emergency paving demonstration. The primary data sets collected for this overall body of work are from full-scale constructed test sections where cores were collected over time (Volume 2), and from plant mixed asphalt containing warm mix technology that was field aged for four years or laboratory conditioned (Volume 3). Approximately 5,100 mixture specimens were tested as part of this three volume set of reports. When rounded to the nearest hundred mixture specimens, 300 were tested for Volume 1, 3,400 were tested for Volume 2, and 1,400 were tested for Volume 3. Binder testing was also performed in support of mixture testing. One recommendation from this work was to rely on ASTM D7227 to remove moisture induced during short exposure periods more so than to remove moisture induced during long exposure periods such as years of field aging. Cantabro Mass Loss (CML) testing is recommended when paired with a laboratory conditioning protocol to assess the effects field aging has on asphalt pavement. The default recommendation is to expose a specimen to 5 days of 85 degrees Celsius air, followed by 14 days submerged in 64 degree Celsius water, and 1 freeze-thaw cycle before testing for CML, which was able to simulate around 4 to 5 years of exposure to the Mississippi climate. Testing binder sampled during construction in a pressure aging vessel (PAV) in conjunction with binder recovered at the surface and at depth in the test sections showed roughly 11 hours of PAV conditioning was needed to simulate one year of the Mississippi climate on the pavement surface, while 3 hours of PAV conditioning simulated one year at depth.
  • Content Notes:
    Work was performed under Mississippi State University projects titled: Asphalt Mixture Field Aging Study Preliminary Testing (Project No. 106526 101000), Field Aging Effects on Asphalt Mixed at Different Temperatures and Hauled Different Distances (State Study 266), and Laboratory Conditioning and Field Aging of Asphalt Mixtures (State Study 270). All work performed for this report was under principal investigator Isaac L. Howard. Two additional reports were performed as part of Project 106526 101000, State Study 266, and State Study 270, which were designated FHWA/MS-DOT-RD-18-266/270-Volume 1 and FHWA/MS-DOT-RD-18-266/270-Volume 3. Both additional volumes deal with field aging of asphalt mixtures and all three reports complement each other.
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