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Aggregate Properties and the Performance of Superpave-Designed Hot-Mix Asphalt (2005) / Chapter Skim
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Pages 74-76

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From page 74...
... 6.1.1 Coarse Aggregate Angularity The research revealed the following about coarse aggregate angularity: • Increased coarse aggregate fractured faces provide increased rutting resistance. Increased particle index value or uncompacted voids in coarse aggregate also provide increased rutting resistance.
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From page 75...
... These materials have a demonstrated history of field performance under high traffic even though they do not meet the uncompacted voids content specifications for high traffic. • Research should be conducted to relate the CAR test to the rutting performance of HMA.
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From page 76...
... 76 6.5 LONG-TERM PAVEMENT STUDIES AND ACCELERATED TESTING There is also a need to emphasize the collection and reporting of aggregate property data for both in-service pavements and accelerated loading facilities. More effort needs to be placed on capturing aggregate property data in national studies related to HMA performance.
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Key Terms

  • uncompacted voids
  • natural sand
  • voids content
  • fine aggregate
  • screening tests

  • rutting performance
  • aggregate properties
  • coarse aggregate
  • sulfate soundness
  • particle index

  • current test
  • pacted voids
  • elongated particles
  • aggregate angularity
  • voids contents

  • car test
  • uncompacted void
  • soundness test
  • abrasion loss
  • minimum vma


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