Performance Evaluation of Cold In-Place Recycling Projects in Arizona

The Arizona Department of Transportation (ADOT) has been using cold in-place recycling (CIR) as a rehabilitation strategy for over two decades. Several highway pavements throughout the State have been rehabilitated using CIR, typically in conjunction with an asphalt overlay or a double application of seal coat. As with any other aspect of design and construction method, practices used to assess the feasibility of CIR on a given project, the CIR construction process, and the materials used to produce CIR materials have evolved over time. The primary objective of this investigation was to evaluate and document the performance of selected CIR projects in Arizona. To satisfy this objective, detailed design, construction, performance, and traffic data on 17 CIR projects were compiled and summarized. In-depth profiles of each project, including historical trends of key distresses (cracking, rutting, flushing), ride quality, and maintenance costs, were developed and are presented in this report. The 17 CIR projects were constructed on low to moderate volume roads between 1981 and 2001. The projects involved one of the following types of applications: (1) CIR for the top 2 to 3 in. of an existing Hot-mix asphalt (HMA) surface layer. (2) CIR for the top 2 to 3 in. of an existing HMA surface layer, followed by a 2- to 3-in. HMAC overlay. Overall performance of the CIR projects was found to be good, with most projects showing low to moderate levels of distress and roughness after many years. Both application types were deemed to be viable forms of pavement preservation for low- to moderate-volume roadways, with the CIR/overlay application noted as providing greater assurance of adequate performance and reduced likelihood of premature failure.

• Record URL:
  http://apps.azdot.gov/ADOTLibrary/publications/project_reports/PDF/AZ460.pdf
• Corporate Authors:

  Applied Research Associates, Incorporated

  505 West University Avenue
  Champaign, IL  United States  61820-3915

  Arizona Department of Transportation

  206 South 17th Avenue
  Phoenix, AZ  United States  85007

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Mallela, J
  • Von Quintus, H L
  • Smith, K L
• Publication Date: 2006-3

Language

• English

Media Info

• Media Type: Print
• Edition: Final Report
• Features: Appendices; Figures; References; Tables;
• Pagination: 133p

Subject/Index Terms

• TRT Terms: Bituminous overlays; Cold in-place recycling; Costs; Cracking; Evaluation; Flushing; Pavement design; Pavement distress; Pavement performance; Pavements; Preservation; Recycling; Rehabilitation; Ride quality; Road construction; Roughness; Rutting; Seal coating; Traffic data
• Geographic Terms: Arizona
• Subject Areas: Design; Finance; Highways; Maintenance and Preservation; Pavements; I22: Design of Pavements, Railways and Guideways; I23: Properties of Road Surfaces; I61: Equipment and Maintenance Methods;

Filing Info

• Accession Number: 01032963
• Record Type: Publication
• Report/Paper Numbers: FHWA-AZ-06-460
• Contract Numbers: SPR-PL-1(51)460
• Files: TRIS, USDOT, STATEDOT
• Created Date: Sep 11 2006 4:21PM