Evaluation of non-destructive technologies for construction quality control of HMA and PCC pavements in Louisiana.

Details

• Creators:
  Icenogle, Patrick ; Kabir, Sharear
• Corporate Creators:
  Louisiana Transportation Research Center
• Corporate Contributors:
  United States. Federal Highway Administration
• Subject/TRT Terms:
  • Nondestructive tests
  • Hot mix paving mixtures
  • Portland cement concrete
  • Pavement performance
  • Quality assurance
  • Quality control
  • Deflectometers
  • Portable equipment
• Publication/ Report Number:
  FHWA/LA.12/493
• Resource Type:
  Tech Report
• Geographical Coverage:
  Louisiana
• Corporate Publisher:
  Louisiana. Dept. of Transportation and Development
• Abstract:
  Current roadway quality control and quality acceptance (QC/QA) procedures for the Louisiana Department of Transportation and ; Development (LADOTD) include coring for thickness, density, and air voids in hot mix asphalt (HMA) pavements and thickness and ; compressive strength for Portland cement concrete (PCC) pavements. Non-destructive testing (NDT) devices, such as the light weight ; deflectometer (LWD) and the portable seismic pavement analyzer (PSPA), provide a non-destructive and portable means of quick inplace ; determination of pavement properties, resulting in an increase in sampling frequency to supplement coring. Many researchers have ; shown good trends between measurements of the NDTs and other pavement properties, though variability has shown to differ from report ; to report. The PSPA exhibited seismic modulus values of the surface layer with an average coefficient of variation (CoV) of 2 to 15 ; percent for repeat collections without moving the apparatus. The PSPA variability increased to a range of 6 to 28 percent if the apparatus ; changed orientation or moved within a close proximity. The LWD exhibited deflections values of the pavement structure with an average ; CoV of 4 to 12 percent for repeat collections without moving the apparatus. The PSPA exhibited project wide seismic modulus values ; with a CoV between 1 and 32 percent. The LWD exhibited project wide deflection values with a CoV between 18 and 55 percent. ; Factors that increased variability include: deterioration of the feet pads, presence of vibrations, placement of a foot into a groove, testing ; close to joints, and temperature. Changing the orientation of the sensors showed to increase the variability of the PSPA measurements; ; however, the variability increase is no different than moving the apparatus within a close proximity. Orientation of the sensors did not ; show to have a bias to measuring parallel or perpendicular to the paving direction. The strength gain measured by the PSPA correlated ; well with the strength gain of laboratory testing for only one of the PCC data sets for this study. The LWD deflections correlated well ; with the FWD deflections, but the back-calculated moduli of the surface layer did not correlate well. No trends were observed between ; the PSPA and LWD. A preliminary sampling procedure was developed for the PSPA as a quality control tool in Louisiana.
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• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/26693/dot_26693_DS1.pdf
• File Type:
  [PDF - 1.32 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:6a08fc1aa08f3d4eed220ca86747fec5d85212fc7bec117b5783fd2868e4cb06