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Validating the Fatigue Endurance Limit for Hot Mix Asphalt (2010) / Chapter Skim
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Summary
Pages 1-4

The Chapter Skim interface presents what we've algorithmically identified as the most significant single chunk of text within every page in the chapter.
Select key terms on the right to highlight them within pages of the chapter.


From page 1...
... The concept of the HMA fatigue endurance limit -- a level of strain below which there is no cumulative damage over an indefinite number of load cycles -- is proposed to explain this occurrence. Therefore, additional pavement thickness, greater than that required to keep strain levels at the bottom of the HMA layer below the endurance limit, would not provide additional life.
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From page 2...
... Optimum plus binder content combined with lower sample air voids produced a slight increase in the endurance limit. A mini round-robin was conducted to assess the variability of beam fatigue tests at normal strain levels and extrapolations at low strain levels.
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From page 3...
... Additional cracking data were presented, which demonstrates the improved fatigue performance of mixes containing polymer modified binders, similar to that indicated in the beam fatigue testing program. Analyses were conducted on data from the structural sections of the 2003 NCAT Test Track to estimate the shift factor between laboratory and field performance.
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From page 4...
... change in pavement thickness for PerRoad. Using the endurance limits predicted from beam fatigue tests conducted as part of the study and the default traffic classification, the perpetual pavement thickness determined with PerRoad was approximately the same as the 20- and 40-year conventional (no endurance limit)
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Key Terms

  • beam fatigue
  • fatigue tests
  • million cycles
  • strain levels
  • fatigue endurance

  • shift factor
  • endurance limits
  • test track
  • fatigue testing
  • strain level

  • pavement thickness
  • uniaxial tension
  • estimated endurance
  • fatigue life
  • normal strain

  • shift factors
  • ncat test
  • loading cycles
  • optimum plus
  • exponential model

  • structural sections
  • dissipated energy
  • binder content
  • fatigue performance
  • induced strain

  • pavement design
  • pavement studies
  • perpetual pavement
  • limit based
  • logarithmic regression


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