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Investigation on fatigue properties of asphalt mixtures with different compaction levels using microstructural analysis

  • RWTH Aachen University
  • Sino-European Research Center for Advanced Transportation Infrastructure Technology

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

Abstract

In order to evaluate the fatigue damage of asphalt mixtures under repeated loads, the Digital Image Processing (DIP) was used to investigate the microstructural characteristics of air-voids. A field test track was constructed to reflect the internal states of asphalt pavement, and several cores were drilled to slice into specimens with different air-void ratios. Test temperatures were -10°C, 0°C and 10°C, the internal structures were scanned by X-ray Computed Tomography (X-CT) device before and after fatigue damage, and the influence of air-voids on fatigue damage was investigated. The results indicate that air-void shape and distribution can be measured by X-CT images and reconstructed by DIP effectively; fractal dimension is a quantitative index to represent the complexity of air-void morphology. The effects of temperature and initial air-void ratio on fatigue performance are significantly, and change of air-void ratio presents a linear relation with respect to the complexity of air-void morphology.

Original languageEnglish
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
PublisherCRC Press/Balkema
Pages845-854
Number of pages10
ISBN (Print)9781315643274
DOIs
StatePublished - 2016
Externally publishedYes
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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