Characterization of HMA moisture damage using surface energy and fracture properties

Eyad Masad, Corey Zollinger, Rifat Bulut, Dallas Little, Robert Lytton, Hussain Khalid, Richard Davis, Tom Scarpas, Elli Fini, Alvaro Guarin

Research output: Contribution to journalConference articlepeer-review

118 Scopus citations


Moisture damage in asphalt mixtures can be defined as loss of strength and durability due to the presence of moisture at the binder-aggregate interface (adhesive failure) or within the binder (cohesive failure). This study focuses on evaluating the moisture susceptibility of asphalt mixtures through understanding the mechanisms that influence the adhesive bond between aggregate and asphalt, the cohesive strength of the binder and/or mastic (binder and mineral filler), and fracture of viscoelastic materials. Adhesive and cohesive bond energies are calculated from surface energy measurements. The viscoelastic and fracture properties are obtained using cyclic, torsional strain-controlled loading on cylindrical specimens of sand asphalt mixes until failure occurs. The Dynamic Mechanical Analyzer (DMA) apparatus was used to apply this loading. A methodology is developed in this study to provide an index that is directly related to crack growth in asphalt mixtures subjected to dynamic loading. This index is a function of bond energy, viscoelastic properties, and fracture properties. The developed methodology was used to evaluate a number of asphalt mixtures that exhibited good or poor performance in the field. The resistance of the field mixtures to moisture damage was found in most cases to be related to the mixtures bond energies, the accumulated damage in DMA, and the crack growth index.

Original languageEnglish (US)
Pages (from-to)713-754
Number of pages42
JournalAsphalt Paving Technology: Association of Asphalt Paving Technologists-Proceedings of the Technical Sessions
StatePublished - 2006
Externally publishedYes
EventAssociation of Asphalt Paving Technologists -Proceedings of the Technical Sessions 2006 Annual Meeting - Savannah, GA, United States
Duration: Mar 27 2006Mar 29 2006

ASJC Scopus subject areas

  • Civil and Structural Engineering


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