The Phenomenon of Longitudinal Thermal Cracking: Detection by Means of Thermal Imaging and Case Studies

Le Phenomene de la Fissuration Thermique Longitudinale: Detectino par Imagerie Thermique et Etudes de Cas

Every year, the Quebec Ministry of Transport, Sustainable Mobility and Transport Electrification (MTMDET) schedules the laying of several million tons of asphalt mixes as part of the maintenance and development of the Quebec road network. Behavioral monitoring reveals that the premature appearance of certain types of surface defects, subsequent to laying the mix, has been a regular occurrence. Since 2005, infrared imaging technology has made it possible to establish correlations between these defects and the thermal signature of an asphalt mix layer prior to compact. This technology has gradually been deployed as a means for controlling the quality of asphalt placement. Both a series of technical clauses and a protocol for implementing jobsite measures have been introduced into several MTMDET works contracts since 2008. The tracking of various sites and special expert assessments conducted over the past few years have severed to highlight the effects of asphalt temperature swings on surfacing material behavior. From recorded observations, thermographic control is shown to be an effective method; moreover, the quality of asphalt placement exerts direct impacts on mix properties. The present article solely addresses the expert evaluations related to the development of longitudinal cracks and longitudinal thermal segregation. The focus herein lies on the main set of findings drawn from various evaluations performed over the past few years.

  • Availability:
  • Supplemental Notes:
    • Abstract reprinted with permission of the World Road Association – PIARC.
  • Authors:
    • Lavoie, Martin
  • Publication Date: 2017


  • English
  • French

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Filing Info

  • Accession Number: 01644305
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Aug 29 2017 10:07AM