Characterization of HMA Moisture Damage Using Surface Energy and Fracture Properties (With Discussion)
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.
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/issn/02702932
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Authors:
- Masad, Eyad A
- Zollinger, Corey
- Bulut, Rifat
- Little, Dallas N
- Lytton, Robert L.
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Discussers:
- Khalid, Hussain
- Davis, Richard
- Scarpas, Tom
- Fini, Elli
- Guarin, Alvaro
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Conference:
- 2006 Journal of the Association of Asphalt Paving Technologists: From the Proceedings of the Technical Sessions
- Location: Savannah Georgia, United States
- Date: 2006-3-27 to 2006-3-29
- Publication Date: 2006
Language
- English
Media Info
- Media Type: Print
- Features: CD-ROM; Figures; References; Tables;
- Pagination: pp 713-754
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Serial:
- Journal of the Association of Asphalt Paving Technologists
- Volume: 75
- Publisher: Association of Asphalt Paving Technologists (AAPT)
- ISSN: 0270-2932
- Serial URL: https://www.asphalttechnology.org/site_page.cfm?pk_association_webpage_menu=9169&pk_association_webpage=19109
Subject/Index Terms
- TRT Terms: Adhesion; Asphalt mixtures; Asphaltic sand; Binders; Bond strength (Materials); Cohesive strength; Dynamic loads; Failure; Fracture properties; Hot mix asphalt; Loads; Mineral fillers; Moisture damage; Surface energy; Viscoelastic materials
- Uncontrolled Terms: Aggregate binder interaction; Crack growth; Dynamic mechanical analyzer
- Subject Areas: Highways; Materials; I31: Bituminous Binders and Materials;
Filing Info
- Accession Number: 01041454
- Record Type: Publication
- Files: TRIS
- Created Date: Jan 30 2007 1:29PM