Texas perpetual pavements : experience overview and the way forward.

Details

• Alternative Title:
  Project title: Monitor field performance of full-depth asphalt pavements to validate design procedures
• Creators:
  Walubita, Lubinda F. ; Liu, Wenting ; Scullion, Tom
• Corporate Creators:
  Texas Transportation Institute
• Corporate Contributors:
  Texas. Dept. of Transportation ; United States. Federal Highway Administration
• Subject/TRT Terms:
  • Perpetual pavements
  • Hot mix asphalt
  • Aggregates, rock and stone
  • Pavement cracking
  • Overlays (Pavements)
  • Rutting
  • Deformation
  • Modulus of deformation
  • Infrared imagery
  • Pavements, Asphalt--Texas--Testing
  More +
• Publication/ Report Number:
  FHWA/TX-10/0-4822-3
• Resource Type:
  Tech Report
• Geographical Coverage:
  Texas
• Edition:
  Technical report; Sept. 2005-Sept. 2009.
• Corporate Publisher:
  Texas Transportation Institute
• Abstract:
  Since 2001, the State of Texas has been designing and constructing perpetual pavements on some of its heavily ; trafficked highways where the expected 20-year truck-traffic estimate of 18 kip ESALs is in excess of 30 million. To ; date, there are 10 in-service perpetual pavement (PP) sections, typically consisting of about 22 inches total thickness of ; HMA layers and supported on an 8-inch thick treated (lime or cement) base, resting on a well compacted subgrade ; soil. This report provides an overview of the Texas construction and evaluation experience of PPs including structural ; design, materials and mix-designs, construction and quality issues, and performance history. The research ; methodology and scope of work included data collection, extensive laboratory and field testing, computational ; modeling, and performance evaluations. Based on the research findings, recommendations for the future Texas PP ; design, construction, and performance monitoring are provided in this report. ; Overall, performance to date is satisfactory with no major structural distresses. However, constructionrelated ; joint and cracking problems were observed on a few projects. Laboratory and field experience has also ; indicated workability, compactability, and constructability related problems with the Stone Filled (SF) HMA mixes, ; which serve as the main structural load-carrying layers. Recommendations have accordingly been made to improve or ; replace the SF mix-designs. Recommendations are also provided for the structural design of future Texas PPs; the ; current PP designs were found to be conservative with potential for further optimization. The results generated support ; the transition to higher design moduli values, yielding a 6 or more inch structural thickness reduction in the total HMA ; thickness.
  More +
• Format:
  PDF
• Funding:
  0-4822
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/18312/dot_18312_DS1.pdf
• File Type:
  [PDF - 6.92 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:b2382043b934007815d74dcd7342820c742c0fa720dbbc2a7bb8be3a04627a23