Implementation of low temperature tests for asphalt mixtures to improve the longevity of road surfaces.

Details

• Creators:
  Romero, Pedro ; Jones, ZacGary L.
• Corporate Creators:
  University of Utah. Dept. of Civil and Environmental Engineering
• Corporate Contributors:
  United States. Dept. of Transportation. Research and Innovative Technology Administration
• Subject/TRT Terms:
  • Asphalt pavements
  • Low temperature
  • Creep
  • Cores (Specimens)
  • Field tests
  • Pavement performance
  • Pavement distress
  • Asphalt mixtures
  • Thermal stresses
  • Rheological properties
• Resource Type:
  Tech Report
• Geographical Coverage:
  Utah
• Corporate Publisher:
  North Dakota State University
• Abstract:
  Field samples were obtained from cores taken from multiple roads around the Salt Lake Valley in Utah and prepared for BBR testing. The response of field cores showed that even though the same binder grade used in the region was the same, the resulting mixtures have significant differences in creep moduli and m-values. This indicates that binder testing alone might not be enough to control the material’s creep modulus. ; The combination of BBR test results and field surveys indicate that both creep modulus and m-value play a significant role in low-temperature performance of asphalt pavements. Pavements with high creep moduli and low m-values are more susceptible to low-temperature thermal distress. From field observations, the field performance of each section was known; by plotting the test results of the field samples on a Black Space Diagram, it can be observed that a thermal stress failure envelope might exist. These results will allow the development of asphalt mixtures that have resistance to both low and high temperature distresses. However, more research will be necessary to further define this specification.
• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/26864/dot_26864_DS1.pdf
• File Type:
  [PDF - 1.65 MB]
• Collection(s):
  University Transportation Centers ; US Transportation Collection
• Main Document Checksum:
  urn:sha256:9124689b774e2bc8e701e7f893ee67c16c0d8edb8f75238c14562b11372fb04f