Forensic Investigation of AC and PCC Pavements with Extended Service Life : Volume 2 : Petrographic Examination of PCC Core Samples at Lankard Materials Laboratory

Details

• Creators:
  Lankard, David
• Corporate Creators:
  Ohio University. Ohio Research Institute for Transportation and the Environment (ORITE)
• Corporate Contributors:
  Ohio. Dept. of Transportation. Office of Research and Development ; United States. Federal Highway Administration
• Subject/TRT Terms:
  Design Flexible Pavement Performance Flexible Pavements Forensic Testing Pavement Performance Predicted Pavement Service Life Rigid Pavement Performance Rigid Pavements Service Life Testing
• Publication/ Report Number:
  FHWA/OH-2010/004B
• Resource Type:
  Tech Report
• Geographical Coverage:
  Ohio
• Edition:
  Technical report.
• Corporate Publisher:
  Ohio Research Institute for Transportation and the Environment
• Abstract:
  The purpose of this research was to identify flexible and rigid pavements in Ohio with average and above average
  
  performance, and determine reasons for these differences in performance. The identification and implementation of
  
  factors linked to extended service life will improve performance statewide. FWD and ride quality profiles were
  
  measured to evaluate project uniformity, and material samples were obtained from a selected location on each project
  
  and tested in the laboratory to determine material properties. Volume 1 of the report includes: the project selection
  
  process, FWD and ride quality data, laboratory results of testing on base, subgrade and asphalt concrete pavement
  
  samples, and projected services lives using FWD data and the MEPDG. Volume 2 provides the results of laboratory
  
  tests and petrographic examinations on the Portland cement concrete cores. Volume 3 contains petrographic analysis
  
  of PCC pavement specimens in Cuyahoga County, Ohio containing Blast Furnace Slag Aggregate.
  
  Flexible and rigid pavements in Ohio receiving no structural maintenance show an average condition rating of 68
  
  after 20 and 30 years of service, respectively. This performance, coupled with no structural distress being observed on
  
  the pavements selected for study indicates pavement design procedures used in Ohio are meeting expectations. Among
  
  the items recommended to improve pavement performance include: 1) maintaining subgrade uniformity to minimize
  
  localized failures, 2) reducing amounts of Portland cement and using larger aggregate in 451 and 452 concrete, while
  
  continuing to test aggregate for D-cracking susceptibility, 3) increasing emphasis on ensuring that dowel bars maintain
  
  proper alignment during placement of PC concrete, and 4) continuing the use of performance grading and polymers
  
  when designing AC mixes on heavily traveled pavements. Other observations regarding the data used to reach these
  
  conclusions include: keeping the PMIS database current, retaining construction records for at least the design life of the
  
  pavements, being aware that the effect of surface cracks on flexible pavement performance depends upon whether the
  
  cracks are top-down or bottom-up, and the PMIS and straight-line diagrams should be consistent in identifying project
  
  limits, project numbers and paving materials.
  
  Volume 2 of the report contains petrographic analysis of PCC pavement specimens.
  
  
• Format:
  PDF
• Funding:
  State Job No. 134280
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:7fa5f66a665154a16c3305d17036cebbfb692a7d5e6ead1a06ba7c8ca64ebb42
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/20559/dot_20559_DS1.pdf
• File Type:
  [PDF - 3.85 MB ]