The Resource Seasonal variation of backcalculated subgrade moduli : preprint / Bing Long, Mustaque Hossain, and Andrew J. Gisi

Seasonal variation of backcalculated subgrade moduli : preprint / Bing Long, Mustaque Hossain, and Andrew J. Gisi

Label
Seasonal variation of backcalculated subgrade moduli : preprint / Bing Long, Mustaque Hossain, and Andrew J. Gisi
Title
Seasonal variation of backcalculated subgrade moduli : preprint / Bing Long, Mustaque Hossain, and Andrew J. Gisi
Creator
Contributor
Subject
Language
eng
http://library.link/vocab/creatorName
Long, Bing
LC call number
TE7.H5 L85 1997
http://library.link/vocab/relatedWorkOrContributorName
  • Hossain, Mustaque
  • Gisi, Andrew J
http://library.link/vocab/subjectName
  • Asphalt pavement
  • Subgrade
  • Effective roadbed soil resilient modulus
  • AASHTO
  • Modulus
  • Seasonal variation
Label
Seasonal variation of backcalculated subgrade moduli : preprint / Bing Long, Mustaque Hossain, and Andrew J. Gisi
Instantiates
Publication
Note
  • Duplication of this preprint for publication or sale is strictly prohibited without prior written permission of the Transportation Research Board
  • Transportation Research Board 76th Annual Meeting
  • Abstract: "Seasonal variations in pavement material properties and behavior due to variations in temperature and moisture conditions are known to affect pavement structural performance. Temperature, subgrade moisture content, and FWD-deflection data were collected monthly on four asphalt pavement test sections for a year. Subgrade moduli were backcalculated using the elastic layer theory with two different calculation schemes and pavement models. Backcalculation of subgrade moduli by subdividing the subgrade into a compacted subgrade layer and a natural soil subgrade layer resulted in compacted subgrade moduli that are more sensitive to the seasonal variation for all sites. It was found that for almost all sites, the patterns of subgrade response, in terms of subgrade moduli versus subgrade moisture content, simulated sine-shaped forms signifying a temperature effect. The temperature effect was confirmed by the strong correlation between backcalculated subgrade moduli and pavement surface temperature during FWD tests. The lowest backcalculated subgrade moduli were obtained for two sections during months when asphalt surface temperatures were excessively high (greater than 40° C). Also, both backcalculation schemes showed similar trends in variation of subgrade moduli over seasons. When the AASHTO relative damage concept was used to compute the effective roadbed soil resilient modulus for design, similar values were found for both schemes for most of the sites. The minimum frequency of FWD testing to capture the seasonal variation of subgrade was found to be three tests per year or testing every fourth month assuming that unusually high temperature regimes could be avoided."
Extent
27p.
System control number
(EOS.Web)7229296
Label
Seasonal variation of backcalculated subgrade moduli : preprint / Bing Long, Mustaque Hossain, and Andrew J. Gisi
Publication
Note
  • Duplication of this preprint for publication or sale is strictly prohibited without prior written permission of the Transportation Research Board
  • Transportation Research Board 76th Annual Meeting
  • Abstract: "Seasonal variations in pavement material properties and behavior due to variations in temperature and moisture conditions are known to affect pavement structural performance. Temperature, subgrade moisture content, and FWD-deflection data were collected monthly on four asphalt pavement test sections for a year. Subgrade moduli were backcalculated using the elastic layer theory with two different calculation schemes and pavement models. Backcalculation of subgrade moduli by subdividing the subgrade into a compacted subgrade layer and a natural soil subgrade layer resulted in compacted subgrade moduli that are more sensitive to the seasonal variation for all sites. It was found that for almost all sites, the patterns of subgrade response, in terms of subgrade moduli versus subgrade moisture content, simulated sine-shaped forms signifying a temperature effect. The temperature effect was confirmed by the strong correlation between backcalculated subgrade moduli and pavement surface temperature during FWD tests. The lowest backcalculated subgrade moduli were obtained for two sections during months when asphalt surface temperatures were excessively high (greater than 40° C). Also, both backcalculation schemes showed similar trends in variation of subgrade moduli over seasons. When the AASHTO relative damage concept was used to compute the effective roadbed soil resilient modulus for design, similar values were found for both schemes for most of the sites. The minimum frequency of FWD testing to capture the seasonal variation of subgrade was found to be three tests per year or testing every fourth month assuming that unusually high temperature regimes could be avoided."
Extent
27p.
System control number
(EOS.Web)7229296

Library Locations

  • Architecture LibraryBorrow it
    Gould Hall 830 Van Vleet Oval Rm. 105, Norman, OK, 73019, US
    35.205706 -97.445050
  • Bizzell Memorial LibraryBorrow it
    401 W. Brooks St., Norman, OK, 73019, US
    35.207487 -97.447906
  • Boorstin CollectionBorrow it
    401 W. Brooks St., Norman, OK, 73019, US
    35.207487 -97.447906
  • Chinese Literature Translation ArchiveBorrow it
    401 W. Brooks St., RM 414, Norman, OK, 73019, US
    35.207487 -97.447906
  • Engineering LibraryBorrow it
    Felgar Hall 865 Asp Avenue, Rm. 222, Norman, OK, 73019, US
    35.205706 -97.445050
  • Fine Arts LibraryBorrow it
    Catlett Music Center 500 West Boyd Street, Rm. 20, Norman, OK, 73019, US
    35.210371 -97.448244
  • Harry W. Bass Business History CollectionBorrow it
    401 W. Brooks St., Rm. 521NW, Norman, OK, 73019, US
    35.207487 -97.447906
  • History of Science CollectionsBorrow it
    401 W. Brooks St., Rm. 521NW, Norman, OK, 73019, US
    35.207487 -97.447906
  • John and Mary Nichols Rare Books and Special CollectionsBorrow it
    401 W. Brooks St., Rm. 509NW, Norman, OK, 73019, US
    35.207487 -97.447906
  • Library Service CenterBorrow it
    2601 Technology Place, Norman, OK, 73019, US
    35.185561 -97.398361
  • Price College Digital LibraryBorrow it
    Adams Hall 102 307 West Brooks St., Norman, OK, 73019, US
    35.210371 -97.448244
  • Western History CollectionsBorrow it
    Monnet Hall 630 Parrington Oval, Rm. 300, Norman, OK, 73019, US
    35.209584 -97.445414
Processing Feedback ...