Construction of Durable Longitudinal Joints - The Courage to Use Innovations Pays Off

Poorly constructed longitudinal joints will likely lead to joint opening, cracking and ravelling. There are a number of factors that should be considered for cold joint construction that may impact its durability. However, the best way of avoiding future issues with cold joints is to eliminate them by using hot joints. The City of Hamilton has decided to use innovative paving technology to address the joint quality issues. Wherever possible, the City uses hot joints by specifying echelon paving. When feasible, particularly on major paving projects, the City requires the use of Shuttle Buggy(r) materials transfer vehicle (MTV) in order to eliminate thermal and gradation segregation. Wherever the use of echelon paving is not practical, the City has started using infrared joint heaters. Quality assurance testing results indicate that the compaction achieved at these joints is the same or very close to the compaction in the middle of the mat. Also, the new warm asphalt technology is now being implemented by the City. An ongoing study in the City shows that the quality of longitudinal joints in warm asphalt paving is better than in conventional HMA paving; the joints were tight and better compaction and lower permeability can be achieved. This paper describes practical aspects of the applied technology and shows photos of construction and the results obtained in the field.

Language

  • English

Media Info

  • Pagination: 16 p.
  • Monograph Title: 2009 Annual Conference and Exhibition of the Transportation Association of Canada - Transportation in a Climate of Change

Subject/Index Terms

Filing Info

  • Accession Number: 01149379
  • Record Type: Publication
  • Source Agency: Transportation Association of Canada (TAC)
  • Files: TAC
  • Created Date: Jan 28 2010 7:24AM