Mechanisms in Healing of Bitumen and the Impact of Normal Force

Greet Leegwater, Athanasios Scarpas, S. Erkens

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

2 Citations (Scopus)
50 Downloads (Pure)

Abstract

Damage in pavements is known to reduce over time when the material is left to rest, this phenomenon is known as healing. It has been shown that healing is an important influence factor in pavement performance. However, an accepted method to assess the healing capability of a pavement is currently not available. Healing of cracks is assumed to be the sum of two processes, cracked surfaces coming into contact (wetting) and strength gain of surfaces in contact (intrinsic healing). The paper describes influencing parameters of these two processes. The healing potential of bitumen is assessed using a novel test method. In this method two pieces of bitumen are brought together and left to heal under controlled condi-tions. After healing the amount of healing is assessed by testing the specimens us-ing a direct tensile test. From the results it can be seen that normal force has a sig-nificant impact on the observed healing, indicating that the process of two surfaces coming into contact (wetting) has a significant impact on healing behavior of the bitumen.
Original languageEnglish
Title of host publication8th RILEM International Conference on Mechanisms of Cracking and Debonding in Pavements
EditorsA. Chabot, W.G. Buttlar, E.V. Dave, C. Petit, G. Tebaldi
Pages247-252
Number of pages6
DOIs
Publication statusPublished - 2016
Event 8th RILEM International Conference on Mechanisms of Cracking and Debonding in Pavements : MCD2016 - Nantes, France
Duration: 7 Jun 20169 Jun 2016
https://mcd2016.sciencesconf.org/

Publication series

NameRILEM Bookseries
PublisherSpringer
Volume13

Conference

Conference 8th RILEM International Conference on Mechanisms of Cracking and Debonding in Pavements
Country/TerritoryFrance
CityNantes
Period7/06/169/06/16
Internet address

Keywords

  • Healing test
  • Bitumen
  • Intrinsic healing
  • Wetting

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