Evaluation of Fly Ash Test Sites Using a Simplified Elastic Theory Model and Field Measurements

Details

• Creators:
  Alam, S. M. ; Little, D. N. ; Ledbetter, W. B.
• Corporate Creators:
  Texas Transportation Institute. Texas A&M University
• Corporate Contributors:
  Texas State Department of Highways and Public Transportation ; United States. Department of Transportation. Federal Highway Administration
• Subject/TRT Terms:
  • Fly ash
  • Dynaflect
  • Layered soils
  • Elastic analysis
  • Field strength
  • Structural supports
  • Stiffness
  • Evaluation
  • Testing
  • Bessel Functions
• Publication/ Report Number:
  FHWA/TX-85/08+240-4F
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States ; Texas
• Edition:
  Final Report: September 1978 - March 1984
• Corporate Publisher:
  Texas Transportation Institute. Texas A&M University
• Abstract:
  This report summarizes the evaluation of 8 experimental fly ash test sites located on selected Texas Highways. The analysis utilized Dynaflect measured field deflections and a new method for characterizing lime-fly ash stabilized pavement structures. The method was developed utilizing a "simplified elastic theory" model and is most cost effective for analyzing a large number of field measured data. Each test site in the study consisted of several test sections of differing designs. For low PI clayey soils (6 sites), it was found that lime is essential, with the fly ash, for development of effective structural support in the stabilized layers. The optimum lime-fly ash ratios found, for low PI clayey soils, were 0.08 to O.5 using a minimum of 2% lime. Substantial gains in the stiffness of the stabilized layers were noted when 20% to 40% fly ash, with no lime, was used with very low PI coarse sandy soils (1 site).
• Format:
  PDF
• Funding:
  2-9-79-240
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/85140/dot_85140_DS1.pdf
• File Type:
  [PDF - 3.72 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:96d32192476f02d4cdd8bddca115f14048cb1aeb9be7ba1c459f167a668e127b8bb656c72330d1cc74c206eedacb64b28bc6e4726f7242fea7e3b7366e865580