Field assessment of oxidative aging in asphalt concrete pavements with unknown acoustic properties

Megan E. McGovern, William G. Buttlar, Henrique Reis

Research output: Contribution to journalArticlepeer-review

Abstract

Because in the field asphalt concrete acoustic properties (i.e., velocities and corresponding attenuations) are unknown, a modified version of the non-collinear wave mixing method is proposed to evaluate oxidative aging levels. Longitudinal transducers mounted on angle wedges are employed to launch subsurface dilatational waves to allow evaluation when there is only access to one side of the asphalt concrete pavement. For the mixture used, one fixed incident angle was found, which is suitable for the range of oven-aged asphalt concrete specimens, i.e., 0-36 h. Theoretical explanation and experimental evidence supporting the validity of the proposed approach is presented.

Original languageEnglish (US)
Pages (from-to)159-168
Number of pages10
JournalConstruction and Building Materials
Volume116
DOIs
StatePublished - Jul 30 2016

Keywords

  • Asphalt concrete
  • Field testing
  • Longitudinal subsurface waves
  • Non-collinear wave mixing
  • Nonlinear ultrasonics
  • Oxidative aging
  • Pavements

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • General Materials Science

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