trafficking.

Details

• Creators:
  Druta, Cristian ; Wang, Linbing ; McGhee, Kevin K.
• Corporate Creators:
  Virginia Tech Transportation Institute
• Corporate Contributors:
  Virginia. Dept. of Transportation ; United States. Federal Highway Administration
• Subject/TRT Terms:
  Accelerated Tests Accelerated Loading Layer Performance MMLS3 Overlays (Pavements) Scaled Accelerated Trafficking Thin Asphalt Wearing Course (Pavements)
• Publication/ Report Number:
  FHWA/VCTIR 14-R7
• Resource Type:
  Tech Report
• Geographical Coverage:
  Virginia
• Corporate Publisher:
  Virginia. Department of Transportation
• Abstract:
  The primary objective of this study was to evaluate the permanent deformation (rutting) and fatigue performance of
  
  several thin asphalt concrete wearing courses using a scaled-down accelerated pavement testing device. The accelerated testing
  
  was conducted using a model mobile load simulator (MMLS3). Field testing with the MMLS3 was conducted on a 4.75-mm
  
  nominal maximum aggregate size dense-graded mixture installed at the Turner-Fairbank Highway Research Center. This
  
  mixture (designated SM-4.75), two other conventional dense-graded mixtures, and a thin gap-graded mixture were also used to
  
  prepare specimens for laboratory rutting tests using the MMLS3.
  
  Test results from more than 100,000 wheel load applications of the MMLS3 showed that the thin wearing courses
  
  underwent various degrees of permanent deformation depending on their compacted air void content. According to the protocol
  
  guidelines developed for the evaluation of permanent deformation and moisture damage when using the MMLS3, most of the
  
  mixtures performed well. One exception was a coarser dense-graded material with a high amount of recycled asphalt pavement.
  
  No indication of fatigue cracking or other distress was observed for any mixture during or after testing.
  
  The study supports use of the SM-4.75 mixture on low- to medium-traffic roadways and for maintenance and/or
  
  preservation applications. It further recommends that the Virginia Department of Transportation apply the methods demonstrated
  
  through this research to assess better the stability of experimental wearing course mixtures in advance of wider spread field
  
  applications.
  
  
• Format:
  PDF
• Funding:
  98483
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:348d48d6a0b64bd402af4d8fe46ad26fa9cd9d027e02df4e161f1d67cabb47be8c4965f44fc9c798e1304bd0a7b3fdd90511ecd10cc86f2a8cf3c3c06fcb8087
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/27443/dot_27443_DS1.pdf
• File Type:
  [PDF - 3.00 MB ]