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GPR Technical Services
Bridge Deck Inspection










 


Applications
 
  Delamination
Deterioration
  Debonded Overlay
Overlay Thickness
  Depth of Reinforcement

GPR Data Collection
GPR Data Analysis
Results
GPR Standards

Penetradar Technical Services can assist you with GPR bridge deck delamination and deterioration surveys on asphalt covered and exposed concrete bridge decks. GPR can provide quantitative information on the location and quantity of deteriorated concrete and corrosion induced delaminations, the depth of reinforcing steel and thickness or bond of overlays. Our GPR bridge deck surveys are conducted at highway speeds and require no traffic control, thereby eliminating traffic interruptions. GPR is a cost effective source of quantitative information for bridge and maintenance engineers, that can be used for determining repair quantities and preparing project cost estimates, or for high speed inspection of bridge deck networks.

 

GPR Data Collection - GPR data are collected in a series of longitudinal scans along the length of the bridge deck, at high speed and without traffic interruption. Multiple antennas (antenna array) are used to cover an entire lane for one-pass inspection. Our IRIS GPR antenna array ensures that all antenna scans are properly correlated and that detections are properly identified in location and size. GPR can be used effectively on exposed concrete or overlaid bridge decks.
 

GPR Data Analysis -  GPR data are analyzed to detect corrosion induced delamination located at the reinforcing steel, scaled (freeze-thaw damaged) concrete, debonded overlays, depth of reinforcing steel and overlay thickness.
 



BRIDGE DECK DETERIORATION MAP
Results - Fully analyzed results are provided in CAD form as plan-view deck maps showing the location and extent of delamination and deterioration, or depth of reinforcement and overlay thickness. Depth of reinforcement and overlay thickness are also shown as numerical listings or in ASCII file format.
GPR Standards - GPR data are analyzed in accordance with AASHTO TP-36, SHRP C-101 and ASTM D6087-03/05. 

                               

 

Last updated 12/23/08

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