Use of coal fly ash and other waste products in soil stabilization and road construction-including non-destructive testing of roadways.

Details

• Creators:
  Ge, Yuning Louis ; Rosenblad, Brent L. ; Stephenson, Richard W.
• Corporate Creators:
  Missouri University of Science and Technology. Center for Transportation Infrastructure and Safety
• Corporate Contributors:
  United States. Department of Transportation. Research and Innovative Technology Administration
• Subject/TRT Terms:
  • Fly ash
  • Kiln dust
  • Soil stabilization
  • Road construction
  • Subgrade (Pavements)
  • Modulus of resilience
  • Compressive strength
  • Nondestructive tests
  • Laboratory tests
  • Quality control
• Publication/ Report Number:
  NUTC R270 / R271;Project #00033461, 00032726
• Resource Type:
  Tech Report
• Geographical Coverage:
  Missouri
• Corporate Publisher:
  Missouri University of Science and Technology. Center for Transportation Infrastructure and Safety
• Abstract:
  An extensive laboratory testing program was performed on subgrade soils stabilized using fly ash and lime kiln dust. The laboratory ; program included measurements of: compaction curves, small strain elastic moduli, resilient modulus (Mr), Briaud Compaction ; Device (BCD) modulus, and unconfined compressive strengths of subgrade soils mixed with various amounts of Class C fly ash and ; lime kiln dust (LKD). The objectives of this study were to (1) quantify changes with time in subgrade modulus and strength from soil ; stabilization and (2) evaluate potential nondestructive quality control (QC) methods. The amount of improvement in subgrade ; modulus varied with soil type and soil stabilizer. Increases in Mr values by a factor of five or more were observed in some cases. ; Relative changes in resilient modulus with time were compared to changes in modulus values measured from small-strain velocity ; measurements and the BCD (both of which can be applied in the field for QC) with mixed results. In many cases, the trends in ; modulus change were in good agreement, but in other cases significant differences were observed. Short-term tracking of wave ; velocity of stabilized soil showed increases of about 20 to 40% (relative to the unstabilized soil) within 1-hr after compaction. Future ; studies should focus on evaluation of these NDT methods under field conditions.
  More +
• Format:
  PDF
• Funding:
  DTRT06-G-0014
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/27929/dot_27929_DS1.pdf
• File Type:
  [PDF - 6.79 MB]
• Collection(s):
  University Transportation Centers ; US Transportation Collection
• Main Document Checksum:
  urn:sha-512:d3d1dd251084b9b1c03601f8420ef6798a888f4c93b685c7da7928f72ea318bf49309cc8ccbec83a1a989d179752bba42fe69f231babfbaf180abf91bbc5ebcb