Continuous Bituminous Pavement Stripping Assessment Through Non-destructive Testing

The primary objective of the proposed pooled-fund project is to establish a research consortium focused on addressing the R06D and IAP recommendations. As per the IAP and R06D findings and recommendations, particular emphasis will be placed on using 3D-ground penetrating radar (GPR) along with Traffic Speed Deflectometer (TSD) and/or Falling Weight Deflectometer (FWD) to detect the location, distribution, and severity of stripping in full-depth and composite bituminous pavements. Recognizing that 3D-GPR and TSD may not be readily available to all participating states, the study will allocate a portion of the pool fund to hire consulting firms for 3D-GPR and TSD surveys on the projects considered in this study. This will provide a good opportunity for states to familiarize themselves with 3D-GPR applications. Furthermore, the proposed pool fund study will include 1D-GPR testing on limited projects to compare with the 3D-GPR data. The proposed investigation also recognizes that 3D-GPR alone cannot identify stripping all the time and at all subsurface moisture conditions. Hence, the proposed study will also investigate using IE/SASW, MIRA, Thermal Imaging for localized spot verifications. It is essential to clarify that the intent of this study is not to evaluate these tools but to support and validate the final deliverables of the study. The set goals are to be accomplished by the following: (1) Developing a methodology for rapid and automatic stripping detection based on 3D-GPR (or 1D-GPR) data and validating the output using other NDE technologies such as Falling Weight Deflectometer (FWD), Traffic Speed Deflectometer (TSD), Impact Echo (IE), and Thermal Imaging. The development will be based on experience and needs from participants so that the developed methodology can effectively and efficiently support their pavement evaluation program. (2) Verifying and validating the developed methodology on actual projects selected by the participating agencies. The more states, the stronger the methodology (3) Providing participating agencies guidelines on data collection and analysis protocols (4) Drafting AASHTO specification. (5) Facilitating and supporting communication between experts of NDE technologies, state engineers and vendors to advance the use of GPR for inspecting pavement subsurface issues (6) Providing training and technical assistance that includes providing support for specification development and strategies for agency full implementation (7) Conducting technology promotion for the technologies The tools (i.e., equipment, testing procedures, data processing algorithms, specifications) advanced through this project will assist state transportation agencies in rapidly and confidently detecting at early stages the location, extent, depth, and severity of stripping in their roads. The tools will also help eliminate or reduce the number of corings required to evaluate road sections suspected of stripping. Specific tasks within this multi-year program will be developed in cooperation with the consortium participants and in such a manner to address the needs of each participant state.


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Filing Info

  • Accession Number: 01862558
  • Record Type: Research project
  • Source Agency: Federal Highway Administration
  • Contract Numbers: TPF-5(504)
  • Files: RIP, USDOT
  • Created Date: Oct 27 2022 11:32AM