Water vapor movement in freezing aggregate base materials.

Details

• Creators:
  Rogers, Maile A. ; Guthrie, W. Spencer ; Flerchinger, Gerald N.
• Corporate Creators:
  Brigham Young University. Dept. of Civil and Environmental Engineering
• Corporate Contributors:
  United States. Federal Highway Administration
• Subject/TRT Terms:
  Aggregates Base Course (Pavements) Freeze Thaw Durability Frost Heaving Moisture Content Pavement Design Soil Stabilization Water Vapor Winter
• Publication/ Report Number:
  UT-14.04
• Resource Type:
  Tech Report
• Geographical Coverage:
  Utah
• Corporate Publisher:
  Utah. Dept. of Transportation
• Abstract:
  The objectives of this research were to 1) measure the extent to which water vapor movement results in
  
  water accumulation in freezing base materials; 2) evaluate the effect of soil stabilization on water vapor movement
  
  in freezing base materials; 3) determine if the corresponding changes in water content are sufficient to cause frost
  
  heave during winter; 4) determine if the corresponding changes in water content are sufficient to cause reductions in
  
  stiffness during spring; 5) evaluate relationships between selected material properties, freezing conditions, and the
  
  occurrence and impact of water vapor movement; and 6) numerically simulate heat and water movement in selected
  
  pavement design scenarios. The research involved extensive laboratory and field testing, statistical analyses, and
  
  numerical modeling. For a pavement section with a base layer underlain by a capillary barrier, water vapor
  
  movement may be expected to increase the water content of the base layer by 1 to 3 percent during a typical winter
  
  season in northern Utah, with the effect of stabilization depending on the soil properties. Accumulation of water
  
  from long-term water vapor movement into a frost-susceptible base material can lead to frost heave of the base layer
  
  as it approaches saturation but may not cause measurable increases in thaw weakening of the base layer during
  
  spring. Because water in the base layer cannot drain until nearly reaching positive pore pressures, only non-frostsusceptible
  
  base materials should be specified for use in cold climates in conjunction with capillary barriers, and the
  
  base material should be assumed to remain in a saturated condition during the entire service life of the pavement.
  
  
• Format:
  PDF
• Funding:
  99087
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:09eec7a7a9e62ad2305f1aeb2f6853c78904c28ddb15bea7d2a71ea567828c6b
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/27866/dot_27866_DS1.pdf
• File Type:
  [PDF - 42.63 MB ]