Reproducibility of Texas Department of Transportation Falling Weight Deflectometer Fleet

Details

• Creators:
  Rocha, S. ; Tandon, Vivek ; Nazarian, S.
• Corporate Creators:
  University of Texas at El Paso. Center for Highway Materials Research
• Corporate Contributors:
  Texas. Dept. of Transportation ; United States. Federal Highway Administration
• Subject/TRT Terms:
  • Calibration
  • Data collection
  • Falling weight deflectometers
  • Load cells
  • Geophones
  • Pavements
  • Remaining life
  • Repeatability
  • Reproducibility
  • Sensors
  More +
• Publication/ Report Number:
  RR-1784-1
• Resource Type:
  Tech Report
• Geographical Coverage:
  Texas ; United States
• TRIS Online Accession Number:
  01389541
• Corporate Publisher:
  University of Texas
• Abstract:
  The degree of accuracy with which the Falling Weight Deflectometer (FWD) data are collected and analyzed has a direct impact on the conclusions drawn in many aspects of TxDOT operation. TxDOT owns 15 units, the largest FWD fleet of any single transportation agency in the world. TxDOT purchased its first unit in 1983 and has added additional FWDs on three- or four-year cycles over a span of 15 years. Therefore, the current fleet includes FWD units of different vintages and units with different components. Both good repeatability and reproducibility are considered to be of major importance for an adequate interchangeability of the FWD fleet. The first two tasks of the project consisted of evaluating the reproducibility and repeatability of the fleet and study the impact of the components on the reproducibility and repeatability of a given FWD. This report contains a summary of the results from these two tasks.
• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/42216/dot_42216_DS1.pdf
• File Type:
  [PDF - 22.28 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:aee4e7949d2105088e60334925591af5c0249c7c9f1ec0525dc6b8fed7e548ef