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Measurement of seasonal changes and spatial variations in pavement unbound base and subgrade properties.

File Language:
English


Details

  • Alternative Title:
    LTRC research project capsule, 08-5GT ; Research project capsule, 08-5GT
  • Creators:
    Sharma, Radhey S.
  • Corporate Contributors:
    Louisiana Transportation Research Center
  • Subject/TRT Terms:
  • Publication/ Report Number:
    08-5GT
  • Resource Type:
    Tech Report
  • Geographical Coverage:
    Louisiana
  • Corporate Publisher:
    Louisiana Transportation Research Center
  • Abstract:
    Soils often undergo cyclic wetting/drying, but there is very limited research on unsaturated ; soils subjected to variations in moisture content. More specifically, field moisture variation ; over time in highway unbound bases and subgrade soils is an important issue for pavement ; engineering because such variation will cause the variations of strengths and stiffness of ; pavement materials and affect pavements’ service life. Because of this, both the 1993 ; AASHTO Pavement Design Guide and the new Mechanistic-Empirical Pavement Design Guide ; (M-EPDG), which is newly adopted by AASHTO for pavement structure design, require that field ; moisture variation overtime can be considered one of the major inputs for highway pavement ; structural design. Different engineering measures or approaches in pavement structures are ; also taken with an attempt to have the field moisture variation under control. All of these have ; a cost-associated consequence with an increase in construction and maintenance costs. ; Therefore, understanding field moisture variation over time and its spatial variation in ; unbound bases and subgrade soils is essential to conduct proper and cost-effective pavement ; structural design and construction that will result in pavements reaching their expected ; service lives.
  • Format:
    PDF
  • Download URL:
    https://rosap.ntl.bts.gov/view/dot/17101/dot_17101_DS1.pdf
  • File Type:
    Filetype[PDF - 155.32 KB]
  • Collection(s):
    US Transportation Collection
  • Main Document Checksum:
    urn:sha256:44377f9796b197444633a28c4aaa08be6d6623e28505cf67322f9cadfe551504
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