Innovative Approach to Construction of Durable Longitudinal Joints

Poorly constructed longitudinal joints will lead to joint opening, cracking and ravelling. The best way of avoiding future issues with cold joints is to eliminate them by using hot joints. Wherever possible, the City of Hamilton uses hot joints by specifying echelon paving, often in conjuction with a Shuttle Buggy(r) Materials Transfer Vehicle (MTV) to eliminate thermal and gradation segregation. Wherever echelon paving is not practical, the City uses infrared joint heaters. Quality assurance testing indicates that compaction achieved at these joints is close to that in the middle of the mat. Also, an ongoing study in the City shows that the quality of longitudinal joints with warm mix asphalt is somewhat better than with conventional hot mix paving. The Region of Waterloo has been paving rural projects in echelon with a Shuttle Buggy(r) MTV since 2006. To date, more than 50 projects have been placed using this method, none of which have required centreline/longitudinal joint repairs. This paper describes the practical application of these technologies. The results show that the quality of longitudinal joints is significantly improved. This should result in better long term performance of asphalt pavements in the City of Hamilton and the Region of Waterloo. (A)

Language

  • English

Media Info

  • Pagination: p. 347-361

Subject/Index Terms

Filing Info

  • Accession Number: 01149439
  • Record Type: Publication
  • Source Agency: Transportation Association of Canada (TAC)
  • Files: TAC
  • Created Date: Jan 28 2010 7:33AM