The importance of wetting in healing of bitumen

G. A. Leegwater, A. Scarpas, S. M.J.G. Erkens

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Asphalt concrete has the advantageous ability to heal autonomously, however the mechanisms behind this are not fully understood. To increase insight in the healing mechanism, the healing model used in polymer science is adopted. It interprets healing as the sum of wetting and intrinsic healing. The presented work introduces a new test set-up, which is designed to investigate the relative contribution of wetting and intrinsic healing by measuring the strength gain when two pieces of binder are brought into contact. Results obtained show that for a soft, pure binder, wetting is the dominant process. This can be concluded from the fact that at least 50% of the observed healing can be attributed to wetting. Wetting is highly dependent on both the load level and the duration of load application. Consequently, it is shown that the level of healing observed in asphalt concrete is very dependent on the boundary conditions.

Original languageBritish English
Title of host publicationFunctional Pavement Design - Proceedings of the 4th Chinese-European Workshop on Functional Pavement Design, CEW 2016
EditorsSandra Erkens, Xueyan Liu, Kumar Anupam, Yiqiu Tan
Pages489-498
Number of pages10
DOIs
StatePublished - 2016
Event4th Chinese-European Workshop on Functional Pavement Design, CEW 2016 - Delft, Netherlands
Duration: 29 Jun 20161 Jul 2016

Publication series

NameFunctional Pavement Design - Proceedings of the 4th Chinese-European Workshop on Functional Pavement Design, CEW 2016

Conference

Conference4th Chinese-European Workshop on Functional Pavement Design, CEW 2016
Country/TerritoryNetherlands
CityDelft
Period29/06/161/07/16

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