Self-healing degradation of asphalt concrete materials due to cooling cycles

Bahzad Behnia, Henrique M Reis

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Asphalt concrete is one of the most widely used materials in transportation infrastructure, covering the surface of approximately 94% of more than 4 million miles of highways in United States. Self-healing is an intrinsic property of asphalt material, which can reverse the cracking process in asphalt pavements and therefore extend their pavement service life. The present study utilizes an Acoustic Emission (AE) approach to provide quantitative assessment of self-healing of thermally induced cracks in asphalt concrete materials. Asphalt concrete specimens were subjected to eight cooling cycles and effects of resting time between cooling cycles on self-healing were investigated. The AE test results showed gradual degradation in self-healing capability of asphalt mixtures as the material was exposed to increasing numbers of cooling cycles. However, it was also observed that the rate of self-healing degradation was not constant as it was higher at beginning and then gradually reduced until it reached almost zero after the fourth cooling cycle. Moreover, AE results also indicated that the 12 hours of resting time between cooling cycles significantly increased the self-healing by more than 30% and allowed the material to regain most of its self-healing capabilities.

Original languageEnglish (US)
Title of host publicationHealth Monitoring of Structural and Biological Systems XIII
EditorsPaul Fromme, Zhongqing Su
PublisherSPIE
ISBN (Electronic)9781510625990
DOIs
StatePublished - Jan 1 2019
EventHealth Monitoring of Structural and Biological Systems XIII 2019 - Denver, United States
Duration: Mar 4 2019Mar 7 2019

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume10972
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

ConferenceHealth Monitoring of Structural and Biological Systems XIII 2019
CountryUnited States
CityDenver
Period3/4/193/7/19

Keywords

  • Acoustic Emissions
  • Asphalt Concrete
  • Asphalt Materials
  • Cooling cycles
  • Self-Healing
  • Thermal cracking

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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  • Cite this

    Behnia, B., & Reis, H. M. (2019). Self-healing degradation of asphalt concrete materials due to cooling cycles. In P. Fromme, & Z. Su (Eds.), Health Monitoring of Structural and Biological Systems XIII [109721B] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 10972). SPIE. https://doi.org/10.1117/12.2507281