INFLUENCE OF SUBGRADE/SUBBASE NON-UNIFORMITY ON PCC PAVEMENT PERFORMANCE

Several reconstructed Portland Cement Concrete (PCC) pavement projects in Iowa were recently studied and to evaluate the influence of subgrade/subbase non-uniformity on pavement performance. Crack surveys and field tests to evaluate the subgrade/subbase were conducted. Dynamic cone penetrometer, nuclear density gauge, Geogauge vibration, and Clegg Impact Hammer tests were performed in a grid pattern (2.5 m x 2.5 m over an area of about 7.5 m wide by 30 m long) to develop a database of the subgrade/subbase engineering property values. Results of stiffness, moisture and density, strength, and soil classification were used to produce plots indicating spatial variability of a given property. Natural subgrade soils, fly ash stabilized subgrade, reclaimed hydrated fly ash subbase, and aggregate subbase were studied. The influence of spatial variability of subgrade/subbase was evaluated by modeling elastic properties of the pavement and subgrade using the ISLAB2000 finite element analysis program. Results show that non-uniform subgrade/subbase stiffness increased localized deflections and causes stress concentrations in the pavement, which lead to fatigue cracking and other type of pavement distresses.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0784407444
• Corporate Authors:

  American Society of Civil Engineers

  Geo Institute, 1801 Alexander Bell Drive
  Reston, VA  United States  20191-4400
• Authors:
  • White, D J
  • Rupnow, TFD
  • Ceylan, H
• Conference:
  • Geotechnical Engineering for Transportation Projects, Geo-Trans 2004
  • Location: Los Angeles, California
  • Date: 2004-7-27 to 2004-7-31
• Publication Date: 2004

Language

• English

Media Info

• Features: Figures; References; Tables;
• Pagination: 8 p.
• Serial:
  • ASCE Geotechnical Special Publication
  • Issue Number: 126
  • Publisher: American Society of Civil Engineers

Subject/Index Terms

• TRT Terms: Cracking of concrete pavements; Database management systems; Density; Fly ash; Moisture content; Pavement performance; Portland cement concrete; Soils; Subbase (Pavements); Subgrade (Pavements); Subgrade materials; Vibration
• Geographic Terms: Iowa
• Subject Areas: Design; Geotechnology; Highways; Pavements; I22: Design of Pavements, Railways and Guideways;

Filing Info

• Accession Number: 00987999
• Record Type: Publication
• ISBN: 0784407444
• Report/Paper Numbers: Volume 1
• Files: TRIS
• Created Date: Mar 28 2005 12:00AM