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:
  • Wearing course (Pavements)
  • Surface course (Pavements)
  • Bituminous overlays Accelerated loading, scaled accelerated trafficking, thin asphalt
  • layer performance, MMLS3
• 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."
  More +
• Format:
  PDF
• Funding:
  98483
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/27442/dot_27442_DS1.pdf
• File Type:
  [PDF - 3.00 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:348d48d6a0b64bd402af4d8fe46ad26fa9cd9d027e02df4e161f1d67cabb47be8c4965f44fc9c798e1304bd0a7b3fdd90511ecd10cc86f2a8cf3c3c06fcb8087