Specialized testing of asphalt cements from various ADOT&PF paving projects.

Details

• Creators:
  Hesp, Simon A.M.
• Corporate Creators:
  Alaska University Transportation Center ; Queen's University. Dept. of Chemistry
• Subject/TRT Terms:
  • Asphalt cement
  • Asphalt additives
  • Cracking of asphalt concrete pavements
  • Fatigue cracking
  • Stress cracking
• Publication/ Report Number:
  INE/AUTC 15.06
• Resource Type:
  Tech Report
• Geographical Coverage:
  Alaska
• Corporate Publisher:
  Alaska. Dept. of Transportation and Public Facilities
• Abstract:
  The Alaska Department of Transportation and Public Facilities (ADOT&PF) sampled five different asphalt cements for specialized testing at Queen’s University in ; Kingston, Ontario. This report documents and discusses the findings. The tested asphalts were: PG 58-34, PG 52-40D, PG 52-40N, PG 58-28, and PG 64-28. ; Testing results showed that grade losses according to Ontario’s LS-308 Extended Bending Beam Rheometer (EBBR) ranged from 3.4°C to 6.3°C. Losses according ; to Ontario’s LS-228 Modified Pressure Aging Vessel (PAV) ranged from 0°C to 7.3°C. Grade losses of 3°C and higher are significant in terms of their ability to reduce ; pavement life cycles. Double-edge-notched tension (DENT) tests according to Ontario’s LS-299 DENT protocol were done on PAV residues. The critical crack tip opening ; displacement (CTOD) was determined and, at 15°C, it varied from a low of 19 mm for the PG 58-28 to a high of 175 mm for the PG 58-34. The PG 58- 40D showed a CTOD ; of 139 mm, contrasting with the low polymer PG 52-40N at only 36 mm, a nearly four-fold difference. All the results obtained from this specialized testing effort suggest ; that these materials will provide significant differences in performance. This report provides recommendations on how to obtain better value for money by implementing ; a few simple changes to the ADOT&PF asphalt cement specifications.
• Format:
  PDF
• Funding:
  4000(133)D
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/29004/dot_29004_DS1.pdf
• File Type:
  [PDF - 2.80 MB]
• Collection(s):
  University Transportation Centers ; US Transportation Collection
• Main Document Checksum:
  urn:sha256:a74f938f3ab8b130f51d8ce94955b5a2ad71401add187fb4a647529d92b7a04e