RELATIONSHIP BETWEEN TIMBER BRIDGE CHARACTERISTICS AND ASPHALT PAVEMENT WEAR SURFACE PERFORMANCE - SUMMARY

This summary offers an overview of a research study that assessed the magnitude of premature asphalt deterioration on timber bridges; identified the primary mechanisms responsible for wear surface deterioration; and suggested methods for improving asphalt pavement performance on timber bridges. The study revealed that approximately 50% of counties experience some problems with premature reduced serviceability of the asphalt pavement wear surfaces that cover their timber bridges. The summary looks at possible pavement failure mechanisms and presents the following proposed solutions for controlling timber bridge asphalt pavement cracking: asphalt pavement saw and seal, asphalt pavement fabric or material underlay, removal of extruded oil-type preservative before surfacing, conditioning of bridge timbers to the expected equilibrium moisture content before bridge installation, and tightening of timber decks through maintenance practices.

• Record URL:
  https://ntlrepository.blob.core.windows.net/lib/20000/20700/20787/PB98149180.pdf
• 
• Corporate Authors:

  University of Minnesota, St Paul

  Department of Wood and Paper Science, 2004 Folwell Avenue
  St Paul, MN  United States  55108

  Minnesota Department of Transportation

  395 John Ireland Boulevard
  St Paul, MN  United States  55155
• Authors:
  • Lange, D A
  • Larson, T D
  • Seavey, R
• Publication Date: 1997-6

Language

• English

Media Info

• Features: Figures; Photos; References;
• Pagination: 9 p.

Subject/Index Terms

• TRT Terms: Asphalt pavements; Bridge decks; Deterioration; Maintenance; Pavement cracking; Prevention; Wearing course (Pavements); Wooden bridges
• Subject Areas: Bridges and other structures; Design; Highways; Maintenance and Preservation; Security and Emergencies; I24: Design of Bridges and Retaining Walls; I61: Equipment and Maintenance Methods;

Filing Info

• Accession Number: 00750982
• Record Type: Publication
• Report/Paper Numbers: 1998-07S, Summary Report
• Contract Numbers: 74708 TOC #8
• Files: NTL, TRIS, STATEDOT
• Created Date: Jul 14 1998 12:00AM