Financial impact of fines in the unbound pavement layers.

Details

• Creators:
  Liu, Jenny ; Zhang, Xiong ; Chamberlain, Andrew ; Li, Lin
• Corporate Creators:
  University of Alaska Fairbanks. Department of Civil and Environmental Engineering
• Corporate Contributors:
  United States. Federal Highway Administration
• Subject/TRT Terms:
  • Pavement layers
  • Base course (Pavements)
  • Fines (Materials)
  • Aggregates
  • Granular bases
  • Moisture content
  • Frost heaving
  • Freeze thaw tests
  • Modulus of resilience
• Publication/ Report Number:
  DOT&PF Report Number 4000105;INE/AUTC 14.15
• Resource Type:
  Tech Report
• Geographical Coverage:
  Alaska
• Corporate Publisher:
  Alaska University Transportation Center ; Alaska. Department of Transportation and Public Facilities. Research, Development, and Technology Transfer
• Abstract:
  This study continued the research effort on evaluating the resilient behavior of D-1 base course materials when there is limited water ; access during freezing. D-1 material from the Northern region of Alaska was used, and a closed system was adopted for the specimen ; preparation process to represent an extreme natural freezing process condition in which no water intake occurs during freezing. Resilient ; moduli (MR) of soil specimens were measured and influencing factors investigated included four fines contents ranging from 6% to ; 12%, three moisture contents ranging from 3.3% to 6%, three temperature gradients (low, medium, and high) during the freezing ; process, and a series of temperatures ranging from -5°C to 20°C. ; The study confirmed several findings from previous study (Li et al. 2010). In addition, it was found that temperature gradient and ; stress state are important influencing factors. In a closed system, for D-1 materials with different fines contents, soils tended to increase ; in MR after a freeze-thaw cycle, in some cases significantly, due to soil structure change during the freezing process. MR models were ; then calibrated to predict the resilient behavior of D-1 material under different temperature, moisture, and fines contents and under both ; non-frozen and frozen conditions.
  More +
• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/28201/dot_28201_DS1.pdf
• File Type:
  [PDF - 2.90 MB]
• Collection(s):
  University Transportation Centers ; US Transportation Collection
• Main Document Checksum:
  urn:sha-512:06373c16ed1de8f09896d37fd1f7207973d737e3659e73198634f8a92d85935220db55235b267511426786e2206a9dad13167ce79335f398038c13d77c11b00b