Implementation of warm-mix asphalt mixtures in Nebraska pavements.

Details

• Creators:
  Kim, Yong-Rak ; Zhang, Jun ; Ban, Hoki
• Corporate Creators:
  University of Nebraska--Lincoln. Dept. of Civil Engineering
• Corporate Contributors:
  Nebraska. Dept. of Roads
• Subject/TRT Terms:
  • Warm mix paving mixtures
  • Asphalt pavements
  • Performance tests
  • Performance measurement
  • Pavement performance Warm-mix asphalt
  • Asphalt pavement
  • MEPDG
  • Performance
• Publication/ Report Number:
  MPM-02
• Resource Type:
  Tech Report
• Geographical Coverage:
  Nebraska
• Corporate Publisher:
  Nebraska Transportation Center
• Abstract:
  The primary objective of this research is to evaluate the feasibility of several WMA mixtures as potential asphalt paving ; mixtures for Nebraska pavements. To that end, three well-known WMA additives (i.e., Sasobit, Evotherm, and Advera ; synthetic zeolite) were evaluated. For a more realistic evaluation of the WMA approaches, trial pavement sections of the ; WMA mixtures and their HMA counterparts were implemented in Antelope County, Nebraska. More than one ton of ; field-mixed loose mixtures was collected at the time of paving and was transported to the NDOR and UNL laboratories to ; conduct comprehensive laboratory evaluations and pavement performance predictions of the individual mixtures ; involved. Various key laboratory tests were conducted to identify mixture properties and performance characteristics. ; These laboratory test results were then incorporated into other available data and the MEPDG software to predict the ; long-term field performance of the WMA and HMA trial sections. Pavement performance predictions from the MEPDG ; were also compared to two-year actual field performance data that have annually been monitored by the NDOR pavement ; management team. ; The WMA additives evaluated in this study did not significantly affect the viscoelastic stiffness characteristics of the ; asphalt mixtures. WMA mixtures generally presented better rut resistance than their HMA counterparts, and the WMA ; with Sasobit increased the rut resistance significantly, which agrees with other similar studies. However, two laboratory ; tests—the AASHTO T283 test and semi-circular bend fracture test with moisture conditioning—to assess moisture ; damage susceptibility demonstrated identical results indicating greater moisture damage potential of WMA mixtures. ; MEPDG results simulating 20-year field performance presented insignificant pavement distresses with no major ; performance difference between WMA and HMA, and this has been confirmed by actual field performance data. ; Although only two-year field performance is available to date, both the WMA and HMA have performed well. No ; cracking or other failure modes have been observed in the trial sections. The rut depth and the roughness of WMA and ; HMA sections were similar.
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• Format:
  PDF
• Funding:
  26-1121-0005-001
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/24749/dot_24749_DS1.pdf
• File Type:
  [PDF - 2.36 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:f0a29ca1e56abf295ff8694601ee4f80a68e7b2ed6bc00fa6ce6242b7116b97e62ed902d4b65396ab2245dfcc361978238336dcdb80f3f4ceed50e5f6d89a771