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:
  Continuously Reinforced Concrete Pavements CRCP Database Databases Forensic Evaluations LTE Pavement Distress Rigid Pavements 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.
  
  
• Format:
  PDF
• Funding:
  Project 0-6274
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:5deb439cd6eb85e21dc9e91ace330e4b2610c18ab86b29d4efe7be720246eb27
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/25167/dot_25167_DS1.pdf
• File Type:
  [PDF - 4.42 MB ]