Use of dynamic mechanical analysis (DMA) to evaluate the fatigue and healing potential of asphalt binders in sand asphalt mixtures

Yong Rak Kim, Dallas N. Little, R. L. Lytton, John D'Angelo, Richard Davis, Geoffrey Rowe, Gerald Reinke, Mihai Marasteanu, Eyad Masad, Reynaldo Roque, Laith Tashman

Research output: Contribution to journalArticle

88 Scopus citations

Abstract

Fatigue of asphalt mixtures is a complex subject. In phenomenological fatigue models, the shift factor between laboratory fatigue tests and field data is huge. A significant portion of the shift factor is due to healing of microdamage, and the major contributor to healing is the asphalt cement and/or mastic component of the mixture. The DMA offers an efficient and reliable means of assessing both the fatigue and healing of binders and mastics. In this study cylindrical, sand asphalt samples are tested in the DMA. Several candidate fatigue failure parameters are considered to assess fatigue life and the effect of rest periods on the extension of fatigue life through healing. The effects of rubber modification and aging are also evaluated. The DMA analysis not only allows a repeatable and accurate assessment of healing but also provides insight into the mechanism of fatigue damage.

Original languageEnglish (US)
Pages (from-to)176-206
Number of pages31
JournalAsphalt Paving Technology: Association of Asphalt Paving Technologists-Proceedings of the Technical Sessions
Volume71
StatePublished - Dec 1 2002

Keywords

  • Asphalt Mixture
  • Fatigue Fracture
  • Healing
  • Microdamage

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