In Place of Failure: After Years of Just Doing It, Iowa Finds Positive Long-Term Performance of CIR Layer

Cold in-place recycling (CIR) has been used widely in Iowa, but without any formal evaluation of its performance until 2003, when the Iowa Highway Research Board initiated a study to examine its long-term performance. Two different measures were used: changes in field distress and variations in CIR material characteristics. This study attempts to quantify the influence of CIR on pavement performance. Techniques for measuring pavement characteristics are described, including pavement image analysis to compute the pavement condition index (PCI). Index values were plotted against pavement age for each group of pavements, which is a function of subgrade modulus and average annual daily traffic. Overall findings of pavement performance under different conditions are presented, along with CIR performance as a material.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/11660022
• Authors:
  • Heitzman, Michael
  • Lee, Hosin David
  • Kim, Jungyoung
  • Chen, Don
  • Jahren, Charles T
• Publication Date: 2007-5

Language

• English

Media Info

• Media Type: Print
• Features: Figures; Photos;
• Pagination: pp 56-58
• Serial:
  • Roads & Bridges
  • Volume: 45
  • Issue Number: 5
  • Publisher: Scranton Gillette Communications
  • ISSN: 8750-9229
  • Serial URL: http://www.roadsbridges.com/rb/

Subject/Index Terms

• TRT Terms: Asphalt pavements; Cold mix paving mixtures; Recycled materials
• Geographic Terms: Iowa
• Subject Areas: Design; Highways; Pavements; I22: Design of Pavements, Railways and Guideways;

Filing Info

• Accession Number: 01052183
• Record Type: Publication
• Source Agency: UC Berkeley Transportation Library
• Files: BTRIS, TRIS
• Created Date: Jun 29 2007 7:40AM