A1297 hydro demolition video versus GPR results : west bound lane.

Details

• Creators:
  Sneed, Lesley ; Anderson, Neil ; Torgashov, Evgeniy
• Corporate Creators:
  Missouri University of Science and Technology. Dept. of Civil, Architectural, and Environmental Engineering ; Missouri University of Science and Technology. Dept. of Geological Sciences and Engineering
• Corporate Contributors:
  United States. Federal Highway Administration
• Subject/TRT Terms:
  • Bridge decks
  • Nondestructive tests
  • Concrete bridges
  • Ground penetrating radar
  • Evaluation
  • Portable equipment
  • Data collection
  • Structural health monitoring
• Publication/ Report Number:
  TRyy1308
• Resource Type:
  Video
• Geographical Coverage:
  Missouri
• Corporate Publisher:
  Missouri. Dept. of Transportation. Research, Development and Technology Division
• Abstract:
  This research has examined the use of nondestructive techniques for concrete bridge deck condition ; assessments. The primary nondestructive testing/evaluation (NDT/NDE) technique utilized in this research ; was ground-coupled ground penetrating radar (GPR). The objectives of this research were to examine the ; utility of the nondestructive techniques in evaluating the condition of MoDOT bridge decks to enable faster, ; better, and more cost-effective bridge deck assessments, and to determine the accuracy of the information ; provided. ; Eleven bridge decks were investigated using detailed visual inspections, GPR, portable seismic property ; analyzer (PSPA), core extraction, and chloride ion concentration measurements. The cores underwent a ; detailed visual evaluation and testing to determine the volume of permeable pore space. Data sets were ; compared to determine correlations between the results. Three of the bridge decks investigated underwent ; rehabilitation by hydrodemolition after the initial investigation, and concrete material removal was surveyed ; using lidar to evaluate the NDE estimations. Good correlation was observed qualitatively. Areas of the ; decks where the GPR interpretations indicated evidence of extensive deterioration generally corresponded to ; areas with greater concrete material removal depths after hydrodemolition, and areas where the GPR ; interpretations indicated no evidence of deterioration generally corresponded to areas with minimal concrete ; removal. Findings suggest that the correlation between the GPR interpretations and concrete removal depths ; can be improved quantitatively by adjusting the GPR threshold values used in the interpretation, although ; the major challenge will be to understand how to determine the threshold values without having the benefit ; of the control data. Finally, recommended parameters are provided for ground-coupled GPR data acquisition, processing, and interpretation.
  More +
• Format:
  PDF
• Alternate URL:
  http://library.modot.mo.gov/RDT/reports/TRyy1308/Videos/ ; http://ntl.bts.gov/lib/51000/51500/51573/cmr14-010.pdf
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/27147/dot_27147_DS1.avi
• File Type:
  [Audio-Video - 43.97 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:1a013464cb4ef7632e3ad6710595c382b16a7aba90cfaa8e4a65ac858181adc5