Modeling of asphalt durability and self-healing with discrete particles method

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Abstract

Asphalt is an important road paving material. Besides an acceptable price, durability, surface conditions (like roughening and evenness), age-, weather- and traffic-induced failures and degradation are relevant aspects. In the professional road-engineering branch empirical models are used to describe the mechanical behaviour of the material and to address large-scale problems for road distress phenomena like rutting, ravelling, cracking and roughness. The mesoscopic granular nature of asphalt and the mechanics of the bitumen layer between the particles are only partly involved in this kind of approach. The discrete particle method is a modern tool that allows for arbitrary (self- )organization of the asphalt meso-structure and for rearrangements due to compaction and cyclic loading. This is of utmost importance for asphalt during the construction phase and the usage period, in forecasting the relevant distress phenomena and understand their origin on the grain-, contact-, or molecular scales. Contact models that involve viscoelasticity, plasticity, friction and roughness are state-of-the art in fields like particle technology and can now be modified for asphalt and validated experimentally on small samples. The ultimate goal is then to derive micro- and meso-based constitutive models that can be applied to model behaviour of asphalt pavements on the larger macroscale. Using the new contact models, damage and crack formation in asphalt and their propagation can be modelled, as well as compaction. Furthermore, the possibility to trigger self-healing in the material can be investigated from a micro-mechanical point of view.
Original languageEnglish
Title of host publicationProceedings of the 5th Eurasphalt and Eurobitume Congress, 13-15 June 2012, Istanbul, Turkey
EditorsE. Beuving, P. Dewez, G. Malkoc, M. Southern
Place of PublicationBrussels, Belgium
PublisherFoundation Eurasphalt
Pages1-10
Number of pages10
ISBN (Print)978-90-802884-0-9
Publication statusPublished - 13 Jun 2012
Event5th Eurasphalt and Eurobitume Congress 2012 - Istanbul, Turkey
Duration: 13 Jun 201215 Jun 2012
Conference number: 5

Publication series

Name
PublisherFoundation Eurasphalt
Volume5

Conference

Conference5th Eurasphalt and Eurobitume Congress 2012
CountryTurkey
CityIstanbul
Period13/06/1215/06/12

Keywords

  • IR-80396
  • METIS-288057

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