Long-Term Degradation and Strength Characteristics of Wisconsin Virgin Base Aggregates under HMA Pavements [Research Brief]

Details

• Creators:
  Titi, Hani H.
• Corporate Creators:
  Wisconsin Highway Research Program
• Corporate Contributors:
  Wisconsin. Dept. of Transportation.
• Subject/TRT Terms:
  • Aggregates
  • Base course (Pavements)
  • Calibration
  • Degradation failures
  • Hot mix asphalt
  • Mechanistic design
  • Pavement design
  • Software
  • Structural design
  • Wisconsin Department of Transportation
  More +
• Publication/ Report Number:
  0092-15-06
• Resource Type:
  Brief
• Geographical Coverage:
  United States
• Corporate Publisher:
  Wisconsin. Dept. of Transportation
• Abstract:
  Aggregate base course layers serve an important role in hot mix asphalt (HMA) pavement stability and performance by providing structural support to the surface layer and by dissipating traffic loads and transferring them to the underlying pavement layers or subgrade. Poor base layer performance due to long-term degradation can cause serious pavement distress such as fatigue cracking, rutting, corrugation, depression and frost heave. The Wisconsin Department of Transportation (WisDOT) has hypothesized that base layer aggregate degradation may be caused by: individual aggregate chemical and physical breakdown; freezethaw action; and infiltration of subgrade materials. WisDOT is deploying AASHTOWare Pavement ME Design software in which the base layer aggregate characteristics significantly influence the pavement thickness design and pavement performance. The purpose of this research was to investigate longterm performance of virgin aggregate bases in HMA pavements; investigate and document strength reductions over time; and evaluate the likely causes of both. This information will help local calibration of the AASHTOWare Pavement ME Design software
• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/40780/dot_40780_DS1.pdf
• File Type:
  [PDF - 209.55 KB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:655ab2c73fecc8079a5ea3ee8511ae925b18bbf3b9f42b2fe315fc43d60b502d