Designing Fine Aggregate Mixtures to evaluate fatigue crack growth in asphalt mixtures

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Description

"Fatigue cracking is a significant form of pavement distress in flexible pavements. The properties of the sand-asphalt mortars or fine aggregate matrix (FAM) can be used to characterize the evolution of fatigue crack growth and self-healing in asphalt mixtures. This study compares the internal microstructure of the mortar within a full asphalt mixture to the internal microstructure of the FAM specimen. This study also conducts a limited evaluation of the influence of mixture properties and methods of compaction on the engineering properties of the FAM specimens. The results from this study, although limited in number, indicate that in most cases ...

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xi, 42 p. : ill. ; 28 cm..

Creation Information

Bhasin, Amit; Motamed, Arash & Izadi, Anoosha April 2001.

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Description

"Fatigue cracking is a significant form of pavement distress in flexible pavements. The properties of the sand-asphalt mortars or fine aggregate matrix (FAM) can be used to characterize the evolution of fatigue crack growth and self-healing in asphalt mixtures. This study compares the internal microstructure of the mortar within a full asphalt mixture to the internal microstructure of the FAM specimen. This study also conducts a limited evaluation of the influence of mixture properties and methods of compaction on the engineering properties of the FAM specimens. The results from this study, although limited in number, indicate that in most cases the SGC compacted FAM specimen had a microstructure that most closely resembled the microstructure of the mortar within a full asphalt mixture. Another finding from this study was that, at a given level of damage, the healing characteristic of the three different types of FAM mixes was not significantly different. This indicates that the healing rate is mostly dictated by the type of binder and not significantly influenced by the gradation or binder content, as long as the volumetric distribution of the mastic was the same. In other words, the inherent healing characteristics of the asphalt binder play a more significant role relative to other properties (e.g. volumetrics) in the overall fatigue cracking resistance of the asphalt mixture."

Physical Description

xi, 42 p. : ill. ; 28 cm..

Notes

"April 2011."

Includes bibliographical references (p. 37-40).

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  • Accession or Local Control No: txca-0099
  • OCLC: 752989090 | External Link
  • TxDoc Number: Z TA505.7 R299SW NO.11/161022-1
  • Report No.: SWUTC/11/161022-1
  • Archival Resource Key: ark:/67531/metapth303481

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Texas State Publications

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  • April 2001

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Bhasin, Amit; Motamed, Arash & Izadi, Anoosha. Designing Fine Aggregate Mixtures to evaluate fatigue crack growth in asphalt mixtures, report, April 2001; Austin, Texas. (texashistory.unt.edu/ark:/67531/metapth303481/: accessed July 26, 2016), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; crediting UNT Libraries Government Documents Department.