Investigation of aged hot-mix asphalt pavements.

Details

• Creators:
  Thomas, Jeremiah ; Rahman, Farhana ; Hossain, Mustaque
• Corporate Creators:
  Kansas State University. Transportation Center
• Subject/TRT Terms:
  Aging (Materials) Asphalt Concrete Pavements Falling Weight Deflectometers Fatigue Tests Hot Mix Paving Mixtures Overlays (Pavements) Pavement Performance Rehabilitation (Maintenance) Stripping (Pavements)
• Publication/ Report Number:
  K-TRAN: KSU-09-2
• Resource Type:
  Tech Report
• Geographical Coverage:
  Kansas
• Corporate Publisher:
  Kansas. Dept. of Transportation
• NTL Classification:
  NTL-HIGHWAY/ROAD TRANSPORTATION-Pavement Management and Performance ; NTL-HIGHWAY/ROAD TRANSPORTATION-Construction and Maintenance
• Abstract:
  Over the lifetime of an asphalt concrete (AC) pavement, the roadway requires periodic resurfacing and rehabilitation to provide
  
  acceptable performance. The most popular resurfacing method is an asphalt overlay over the existing roadway. In the design of asphalt
  
  overlays, the thickness is related to the structural strength of the existing pavement. As the layers are overlaid their stru ctural
  
  characteristics change due to aging of asphalt. However, currently there is no method to determine the effect of aging on the strength of
  
  existing pavement layers.
  
  This study examined structural characterization of six pavement test sections in Kansas using three different test methods: Falling
  
  Weight Deflectometer (FWD), Portable Seismic Property Analyzer (PSPA), and Indirect Tensile (IDT) tests. The results were analyzed to
  
  determine how the modulus of an AC pavement layer changes over time.
  
  The results indicate that as the AC pavement ages, its modulus decreases due to pavement deterioration. The most prominent cause
  
  for AC pavement deterioration was observed to be stripping. Two of the test sections on US-169 and K-4 showed little signs of stripping
  
  and had a minimal reduction or even an increase in AC moduli.
  
  The analyzed results from different test methods for moduli were inconclusive as far as any correlation among the methods is
  
  concerned. While the correlation between various test methods studied was mostly consistent for a particular roadway, no universal
  
  correlation was found for all pavement sections tested.
  
  Fatigue test results show that older pavement layers have a higher propensity for fatigue failure than the newer layers. However,
  
  some older pavement layers showed excellent fatigue life. Fatigue results correlated well with the condition of the cores as assessed by
  
  visual observation.
  
  
• Format:
  PDF
• Funding:
  C1819
• Collection(s):
  University Transportation Centers US Transportation Collection
• Main Document Checksum:
  urn:sha256:3ef751cd567375aa044b2b8816c0455119d2be89b6ca1f1db35b276114dd483f
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/26450/dot_26450_DS1.pdf
• File Type:
  [PDF - 2.94 MB ]