Evaluation and field verification of strength and structural improvement of chemically stabilized subgrade soil.

Details

• Creators:
  Snethen,Donald R. ; Miller, Gerald A. ; Cerato, Amy B.
• Corporate Creators:
  University of Oklahoma. School of Civil Engineering and Environmental Science
• Corporate Contributors:
  Oklahoma. Dept. of Transportation. Planning & Research Division ; United States. Federal Highway Administration
• Subject/TRT Terms:
  • Soils
  • Soil stabilization
  • Additives
  • Chemicals
  • Subgrade materials
  • Subgrade (Pavements)
  • Soils
  • Soil modification
  • Soil stabilization
  • Chemical treatment
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• Publication/ Report Number:
  FHWA-OK- ; AA-5-21008
• Resource Type:
  Tech Report
• Geographical Coverage:
  Oklahoma
• Edition:
  Final report; Oct. 2006-Sept. 2008.
• Corporate Publisher:
  Oklahoma. Dept of Transportation
• Abstract:
  Often subgrade soils exhibit properties, particularly strength and/or volume change properties that limit their performance as a support element for pavements. ; Typical problems include shrink-swell, settlement, collapse, erosion or simply insufficient strength. A common approach to subgrade soil support or stability ; problems involves chemical modification or stabilization with additives such as lime (hydrated or quick), fly ash (Class C from lignite coal), cement kiln dust ; (CKD) or Portland cement. Other additives are available, but this group constitutes the major products or by-products used on roadway construction in ; Oklahoma. ; The type and amount of chemical additive is dependent on the purpose or function of the treated material (i.e., improved physical properties or improved ; strength) and selection is based on accepted or standardized procedures. Questions then arise with regard to chemically treated subgrade soils about the rate of ; development and ultimate value of improvement. The purpose of this research is to develop relationships between rate of development and magnitude of ; strength (or physical property) improvement for chemically treated subgrade soils. ; The research project involved laboratory and field studies of the influence of cementitious additives on the strength and structural improvement of stabilized ; subgrade soils. Laboratory tests for measuring strength and structural improvement (e.g. UCS and MR) were conducted on field mixed treated soils and ; laboratory mixed treated and untreated soil samples. UCS and MR tests were conducted on samples varying curing time (field and laboratory mixed) and ; percent additive used (laboratory mixed). A series of field tests (Nuclear w-γ, stiffness gauge, portable FWD, Dynamic Cone Pentrometer, and PANDA ; Pentrometer) were conducted at five field test sites on the untreated subgrade soils and on the treated subgrade soil with curing time as allowed by the ; construction schedule. The research project collected a large volume of both laboratory and field data which are summarized in the appendixes (5) to this ; report.
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• Format:
  PDF
• Funding:
  ODOT Reference 345901 8052 ; ODOT Job Pieces 01946(50)
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/24276/dot_24276_DS1.pdf
• File Type:
  [PDF - 7.65 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:40059f9b7c4f4e0afc3b787aec81544822a9fbb8d93c0b0df5102c7e243fc5f012a77258281af67dcdeb68a0eb9c723b54e84efb49438d631a8056f41afc446d