Soil mixing design methods and construction techniques for use in high organic soils.

Details

• Creators:
  Mullins, Gray ; Gunaratne, Manjriker ; Johnson, Kevin ; Costello, Kelly ; Baker, Spencer ; Mitchell, Elizabeth ; Vomacka, Jeff ; Mullins, Miles
• Corporate Creators:
  University of South Florida. Dept. of Civil and Environmental Engineering
• Subject/TRT Terms:
  • Organic soils
  • Soil stabilization
  • Mix design
  • Literature reviews
  • Laboratory tests
  • Field tests
  • Cement treated soils
• Publication/ Report Number:
  BDK84-977-25 ; BDV25-977-14
• Resource Type:
  Tech Report
• Geographical Coverage:
  Florida
• Corporate Publisher:
  Florida. Dept. of Transportation
• Abstract:
  Organic soils present a difficult challenge for roadway designers and construction due to the high ; compressibility of the soil structure and the often associated high water table and moisture content. For ; other soft or loose inorganic soils, stabilization via cement or similar binders (a method called soil ; mixing) has proven to be an effective and predictable solutions; the FHWA has published a ; comprehensive design manual for these techniques. Organic soils, however, are not addressed therein ; to a level of confidence for design as organic soils do not follow the trends of inorganic soils. ; In short, the high porosity, high water content, and high levels of humic acids differentiate organic soils ; from all other soils where soil mixing has been proven successful. To combat these effects, more ; cement content is required to bring the water/cement ratio down to acceptable levels and even more ; cement is required to offset the acidity. ; Extending the observations of past researchers, a threshold cement content was defined below which ; no strength gain was achieved. This threshold was then defined as a cement content offset above which ; the measured strengths matched well with other soil types. ; This report presents the findings from a thorough literature search, laboratory bench tests, large scale ; laboratory tests, field evaluation of past and on-going projects and concludes with recommendations ; for designing for soil mixing applications in highly organic soils.
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• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/29472/dot_29472_DS1.pdf
• File Type:
  [PDF - 20.07 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:5e79562e973d9ed769c93d0a4ce4f79458432d268897c9bdbb0e989c283a80ac