Update to ARDOT Superpave Gyratory Compaction (SGC) Specification to Increase Pavement Durability

Details

• Creators:
  Braham, Andrew ; Hall, Kevin ; Ansari, M Tahir ; Tiwari, Amarjeet
• Corporate Creators:
  University of Arkansas, Fayetteville
• Corporate Contributors:
  Arkansas. Department of Transportation
• Subject/TRT Terms:
  APA Asphalt Pavements Durability Hot Mix Asphalt IDEAL-CT Life Cycle Costing Mix Design Pavement Performance Rutting Superpave
• Publication/ Report Number:
  TRC2201
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States ; Arkansas
• Edition:
  Final Report, March 28, 2022 - June 30, 2025
• Corporate Publisher:
  Arkansas. Department of Transportation
• Abstract:
  The primary goal ofTRC2201 was to enhance the durability of asphalt pavements in Arkansas. This was accomplished through two steps: exploring extreme scenarios with lab mixtures and comparing eight field sites. Further analysis was conducted using Pavement ME and a life-cycle cost analysis. In the extreme scenario, air voids decreased as Pb and N levels increased; CTindex increased with rising Pb levels, but AP A rut depth results were inconsistent. Additional testing with moisture damage indicated that mixtures that performed well in IDEAL-CT and AP A tests still showed poor resistance to moisture damage. For the eight field projects, lab-mixed samples exhibited slightly better crack resistance at lower values, while plant-mixed samples performed slightly better at higher values. No consistent trend in APA rut depth was observed between lab- and field-produced samples. Additional performance tests indicated that some of the BMD mixtures could be susceptible to rutting with the additional asphalt binder content, and field validation of AP A minimum values should be conducted for these eight projects. Pavement ME analysis revealed that, except for thermal cracking, standard Superpave mixtures performed similarly to the BMD mixtures, with thermal cracking occurring after only 5 years. Using this criterion, adding an extra 0.5% asphalt binder would result in approximately 61 % savings over a 20-year period.
• Format:
  PDF
• Funding:
  TRC2201
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:95ac236ee1dff60350520e6d095ceb08860fdb9a26a6903bcc3ad70e83668e34f05535dd2a4808a410eb7f434de0c338270d1ce6e36606236310fd6f165bc9f8
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/87997/dot_87997_DS1.pdf
• File Type:
  [PDF - 6.41 MB ]