Infrared thermal integrity testing quality assurance test method to detect drilled shaft defects.

Details

• Creators:
  Mullins, Gray ; Winters, Danny
• Corporate Creators:
  University of South Florida. Department of Civil and Environmental Engineering
• Corporate Contributors:
  Washington (State). Department of Transportation ; United States. Federal Highway Administration
• Subject/TRT Terms:
  • Drilling
  • Thermal stability
  • Thermal imagery
  • Infrared imagery
  • Thermal properties
  • Thermal conductivity
  • Detection and identification
  • Infrared detectors
  • Detectors
  • Thermal
  More +
• Publication/ Report Number:
  WA-RD 770.1
• Resource Type:
  Tech Report
• Geographical Coverage:
  Washington
• Edition:
  Final report.
• Corporate Publisher:
  Washington (State). Dept. of Transportation. Office of Research and Library Services
• Abstract:
  Thermal integrity profiling uses the measured temperature generated in curing concrete to assess the quality of cast in place concrete foundations (i.e. drilled shafts or ACIP piles) which can include effective shaft size (diameter and length), anomaly detection inside and outside reinforcement cage, cage alignment, and proper hydration of the concrete. The ability to detect concrete volumes outside the reinforcing cage is perhaps its strongest feature. For this study, no anomalies within the reinforcing cage were encountered but various forms of external section changes were identified as well as several cases of off-center cages. Cage alignments generally varied with depth. Notably, only two cases of reduced concrete cover were detected; bulges were most common.
• Format:
  PDF
• Funding:
  GCA5855
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/21514/dot_21514_DS1.pdf
• File Type:
  [PDF - 13.17 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:ddaf968fc01e0d046fe07a9c61021e59efe1396f2e81dc38e41cd4a2b2ff164516f4e77160ad5ce97703d20d5cf54fb81d30924f647c4e1865a1db2287a3a9ee