Resilient modulus characterization of Alaskan granular base materials.

Details

• Creators:
  Lin, Li ; Liu, Juanyu ; Zhang, Xiong
• Corporate Creators:
  Alaska University Transportation Center ; Alaska. Department of Transportation. Research, Development, and Technology Transfer
• Subject/TRT Terms:
  • Cold weather
  • Permafrost
  • Pavement distress
  • Fines (Materials)
  • Mix design
  • Freeze thaw tests
  • Granular bases
  • Laboratory tests
  • Roads--Design and construction--Cold weather conditions
  • Pavements--Testing
  More +
• Publication/ Report Number:
  FHWA-AK-RD-10-08
• Resource Type:
  Tech Report
• Geographical Coverage:
  Alaska
• Edition:
  Final report.
• Corporate Publisher:
  Alaska. Department of Transportation and Public Facilities
• Abstract:
  When spring comes to cold regions, the active layer (the top few feet of soil that freezes and thaws seasonally) thaws quickly, while ; deeper soil remains frozen. The active layer becomes saturated with water from snowmelt that collects atop the frozen layer. In these ; circumstances, roads across Alaska almost “float” on a soft foundation. Too often, poorly supported pavement buckles and sags under ; the weight of heavy tractor trailers and other vehicles, and it remains deformed once the soils drain and re-stabilize. One way to reduce ; this damage is to control the amount of fines (essentially rock dust) in a pavement mixture. This project investigated base course ; materials commonly used in Alaska’s roads. Liu’s team observed changes in the stiffness of the materials, as well as how their soilwater ; characteristics change under freeze-thaw cycles, and how different percentages of fines and moisture influence material ; properties. Field tests in Alaska’s three DOT&PF regions and subsequent lab research have been completed. Data from this study will ; be used to produce better pavement designs, particularly in some rural areas, where project engineers might be forced to use locally ; available material with high fines content.
• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/25498/dot_25498_DS1.pdf
• File Type:
  [PDF - 1013.57 KB]
• Collection(s):
  University Transportation Centers ; US Transportation Collection
• Main Document Checksum:
  urn:sha-512:f06d04bc497380da13a60629caa208994e963af1bebf744d121f419986d8dd92ebbecb07a09078060a8d4803543fc5c4505697c610787eb627aef42089256d51