Project Level Performance Database for Rigid Pavements in Texas, II

Details

• Creators:
  Ryu, Sungwoo ; Saraf, Sureel ; Won, Moon C.
• Corporate Creators:
  Texas Tech University. College of Engineering
• Corporate Contributors:
  Texas. Dept. of Transportation. Research and Technology Implementation Office ; United States. Federal Highway Administration
• Subject/TRT Terms:
  • Rigid pavements
  • Pavement distress
  • Continuously reinforced concrete pavements
  • Databases
  • CRCP database
  • Pavement distress
  • Forensic evaluations
  • LTE
  • Transfer function
• Publication/ Report Number:
  FHWA/TX -11-0-6274-1 ; Report No. 0-6274-1
• Resource Type:
  Tech Report
• Geographical Coverage:
  Texas
• Edition:
  Technical report; 09/2008-08/2010.
• Corporate Publisher:
  Texas Tech University. Center for Multidisciplinary Research in Transportation
• Abstract:
  Over the years, the Texas Department of Transportation (TxDOT) has built a number of CRCP (continuously reinforced ; concrete pavement) experimental sections to investigate the effects of design, materials, and construction variables on CRCP ; structural responses and performance. Design variables include longitudinal reinforcement (percent steel and bar diameter) ; and slab thickness. Materials variables include coarse aggregate type in concrete. Construction variables include differences in ; concrete placement season and curing method. Field evaluations were conducted and findings include; (1) spalling occurred in ; sections with siliceous coarse aggregate 14 years after construction, (2) more cracking was observed at sections with a larger ; amount of steel, and (3) overall, the performance is excellent. Forensic evaluation conducted on IH40 in the Amarillo District ; shows deficient slab support caused punchout distress. Load transfer efficiency (LTE) at transverse cracks at punchout distress ; area was maintained at quite a high level. It appears that LTE is not a good indicator for structural condition of CRCP. ; Deflection testing using falling weight deflectometer (FWD) continued for Level I test sections. The findings are consistent ; with those in the past – LTEs are quite high regardless of crack spacing, pavement age, slab thickness and season of testing ; (winter vs. summer). Variability in deflections evaluated at 50-ft intervals indicates variations in slab support. TxDOT ; developed a mechanistic-empirical pavement design software, called TxCRCP-ME, under research project 0-5832. A critical ; software element that determines the accuracy of the software is a transfer function. Extensive field evaluations were ; conducted to obtain reasonable distress information, since not all distresses are structural-deficiency related. It was found that ; the majority of distresses that are classified as punchouts in the TxDOT PMIS (pavement management information system) ; are not distresses caused by structural deficiency. They were, rather, caused by issues related to design details, and materials ; and construction quality. Efforts were made to estimate traffic information for the development of a transfer function. The ; traffic information in TxDOT PMIS was utilized; however, there were challenges in estimating accurate traffic.
  More +
• Format:
  PDF
• Funding:
  Project 0-6274
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/25167/dot_25167_DS1.pdf
• File Type:
  [PDF - 4.42 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:5deb439cd6eb85e21dc9e91ace330e4b2610c18ab86b29d4efe7be720246eb27