Revised Dowel Bar Tolerances for Ontario Concrete Pavements

Effective load transfer is a key design element for jointed plain concrete pavement and has a significant impact on long-term pavement performance. To facilitate load transfer and to allow expansion and contraction of the joints, dowel bars should be placed parallel to the vertical and horizontal planes of the pavement. In the past, it was difficult to verify the alignment of dowel bars within a concrete pavement. Recently, the Ontario Ministry of Transportation was given the opportunity to verify dowel bar alignment with an innovative non-destructive technique known as magnetic imaging tomography (MIT). The MIT scan was found to be a quick and accurate method of measuring dowel bar alignment across a transverse joint, allowing real-time, non-destructive assessment of the dowel bar alignment at joints throughout a concrete paving contract. In Ontario, MIT scan data collection and analysis during concrete paving led to process and equipment improvements. The MIT scan was rapidly adopted both as a quality control tool for the contractor and a quality assurance tool for the ministry. Based on data collected over several paving seasons, changes were made to ministry specifications and dowel bar tolerances. The revised dowel bar tolerances for Ontario pavements are presented in this paper.

• Availability:
  • Find a library where document is available. Order URL: https://sh00sh.globat.com/httpsecure/Membership/store.htm
• Supplemental Notes:
  • Abstract reprinted with permission from the International Society for Concrete Pavements.
• Corporate Authors:

  International Society for Concrete Pavements

  6305 Oyster Bay Court
  Bridgeville, Pennsylvania  United States  15017
• Authors:
  • Lane, Becca
  • Kazmierowski, Tom
• Conference:
  • 9th International Conference on Concrete Pavements
  • Location: San Francisco California, United States
  • Date: 2008-8-17 to 2008-8-21
• Publication Date: 2008

Language

• English

Media Info

• Media Type: Digital/other
• Features: Figures; Photos; References; Tables;
• Pagination: pp 476-486
• Monograph Title: 9th International Conference on Concrete Pavements: The Golden Gate to Tomorrow's Concrete Pavements

Subject/Index Terms

• TRT Terms: Concrete pavements; Dowel bar retrofit; Load transfer; Nondestructive tests; Nuclear magnetic resonance; Pavement joints; Specifications; Unreinforced concrete
• Uncontrolled Terms: Magnetic imaging tomography
• Geographic Terms: Ontario (Province)
• Subject Areas: Design; Highways; Materials; Pavements; I22: Design of Pavements, Railways and Guideways; I32: Concrete;

Filing Info

• Accession Number: 01494895
• Record Type: Publication
• Files: TRIS
• Created Date: Oct 2 2013 11:27AM