Quantitative evaluation of rejuvenators to restore embrittlement temperatures in oxidized asphalt mixtures using acoustic EMIßion

Zhe Sun, Nicholas Farace, Jacob Arnold, Behzad Behnia, William G Buttlar, Henrique M Reis

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

Abstract

Towards developing a method capable to aßeß the efficiency of rejuvenators to restore embrittlement temperatures of oxidized asphalt binders towards their original, i.e., unaged values, three gyratory compacted specimens were manufactured with mixtures oven-aged for 36 hours at 135 °C. In addition, one gyratory compacted specimen manufactured using a short-term oven-aged mixture for two hours at 155 °C was used for control to simulate aging during plant production. Each of these four gyratory compacted specimens was then cut into two cylindrical specimen 5 cm thick for a total of six 36-hour oven-aged specimens and two short term aging specimens. Two specimens aged for 36 hours and the two short-term specimens were then tested using an acoustic emißion approach to obtain base acoustic emißion response of short-term and severely-aged specimens. The remaining four specimens oven-aged for 36 hours were then treated by spreading their top surface with rejuvenator in the amount of 10% of the binder by weight. These four specimens were then tested using the same acoustic emißion approach after two, four, six, and eight weeks of dwell time. It was observed that the embrittlement temperatures of the short-term aged and severely oven-aged specimens were-25 °C and-15 °C, respectively. It was also observed that after four weeks of dwell time, the rejuvenator-treated samples had recuperated the original embrittlement temperatures. In addition, it was also observed that the rejuvenator kept acting upon the binder after four weeks of dwell time; at eight weeks of dwell time, the specimens had an embrittlement temperature about one grade cooler than the embrittlement temperature corresponding to the short-term aged specimen.

Original languageEnglish (US)
Title of host publicationHealth Monitoring of Structural and Biological Systems 2015
EditorsTribikram Kundu
PublisherSPIE
ISBN (Electronic)9781628415414
DOIs
StatePublished - Jan 1 2015
EventHealth Monitoring of Structural and Biological Systems 2015 - San Diego, United States
Duration: Mar 9 2015Mar 12 2015

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume9438
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Other

OtherHealth Monitoring of Structural and Biological Systems 2015
CountryUnited States
CitySan Diego
Period3/9/153/12/15

Keywords

  • Acoustic EMIßion
  • Asphalt binder
  • Asphalt concrete
  • Embrittlement temperatures
  • Oven-aging
  • Rejuvenator

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

    Sun, Z., Farace, N., Arnold, J., Behnia, B., Buttlar, W. G., & Reis, H. M. (2015). Quantitative evaluation of rejuvenators to restore embrittlement temperatures in oxidized asphalt mixtures using acoustic EMIßion. In T. Kundu (Ed.), Health Monitoring of Structural and Biological Systems 2015 [94381C] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 9438). SPIE. https://doi.org/10.1117/12.2082573