Implementation of centrifuge testing of expansive soils for pavement design.

Details

• Creators:
  Zornberg, Jorge G. ; Armstrong, Christian P. ; Potkay, Aaron
• Corporate Creators:
  University of Texas at Austin. Center for Transportation Research
• Corporate Contributors:
  Texas. Dept. of Transportation. Research and Technology Implementation Office ; United States. Federal Highway Administration
• Subject/TRT Terms:
  • Subgrade (Pavements)
  • Clay soils
  • Clay
  • Centrifuges
  • Expansive clays
  • Swelling soils
  • Plastic soils Highly plastic clay
  • expansive soils
  • swelling
  • centrifugation
  More +
• Publication/ Report Number:
  TECHNICAL REPORT 5-6048-03-1
• Resource Type:
  Tech Report
• Geographical Coverage:
  Texas
• Corporate Publisher:
  University of Texas at Austin. Center for Transportation Research
• Abstract:
  The novel centrifuge-based method for testing of expansive soils from project 5-6048-01 was implemented into ; use for the determination of the Potential Vertical Rise (PVR) of roadways that sit on expansive subgrades. The ; centrifuge method was modified to allow for testing of both undisturbed and reconstituted specimens as well as ; to match the boundary conditions of the state of practice laboratory method, ASTM D4546. The test was used to ; expand the expansive soils database through a number of sites east of the Balcones Fault Zone in Central Texas ; in order to give designers a better understanding of the characteristics of soils in the region and to compare ; against results from Tex-124-E. The test was further used to test field specimens from various sites to illustrate ; the need for either uncontaminated bulk specimens or undisturbed specimens and to develop a new method for ; sites with limited testing. Instrumentation and monitoring of the heave at field sites were used to validate the ; testing method by showing similar moisture content changes in the field section as in laboratory specimens as ; well as showing a field site in which Tex-124-E misidentifies a site that sits on a non-expansive subgrade. The ; project provided a new method to calculate the PVR of a site using real data, expanded the database of soils to ; include new soils and look at heterogeneity between soil horizons, and analyzed field results to validate the ; results from laboratory experiments.
  More +
• Format:
  PDF
• Funding:
  TXDOT PROJECT NUMBER 5-6048-03
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/32014/dot_32014_DS1.pdf
• File Type:
  [PDF - 26.27 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:53b8ab268cfa5e7ba5eb1550a17ceb55919a61066b4aec2226f3cba69c30d82ac4d12ca0f5c93a42136ca72a4ba217e2b5e1b03659707e2cbecdb4c5bdab7b10