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TRANSCRIPT
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Thermal Imaging to Support
Preservation
Glenn Washer, University of Missouri
October 2016
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Goals and Objectives
• Goal: Broaden the use of IR technologies
for the condition assessment of bridges
• Objectives:
– Provide update on results of pooled fund
– Introduce new IR technologies
• Tools for IR inspection
– IR Deck and Soffit Scanner (IR-DSS)
– IR Ultra-Time Domain Imaging (IR-UTD)
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Pooled Fund States
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Limitations of IR
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New Technology
• IR-DSS
– Mobile System
– 5 MPH
• IR-UTD
– IR-UTD is a new tool for condition assessment
– IR images capture over time are processed to analyze thermal changes
– Overcomes limitations of hand-held IR• Depth of damage
• Weather dependence
• Reproducibility
• Quantitative
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IR-DSS System
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IR-UTD Concept
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IR-UTD Concept
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System Setup at Bridge
IR-UTD
IR-UTD
Existing light pole Pneumatic mast Sign Gantry
IR-UTD
Non-intrusive system collects data without disrupting traffic
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IR System View of the Deck –
~3200 sq ft of deck imaged
IR Markers placed on deck
1 sq ft, spaced at 20 ft.
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Open to Traffic
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~3000 sq. ft. of Bridge Deck - IR-
UTD images, sounding and overlay
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Epoxy Injection
Before Injection After Injection of one
lane
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KC Bridge Deck
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MODOT TPF5(247)
2.3 in. deep delams
Webs
Diaphragm
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Comparison to MoDOT chain drag
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Repeatability
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Voided Slab Bridges
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Photo
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Saturated Concrete
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Structural Configuration
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IR-UTD vs IR-DSS
IR-UTD
IR-DSS
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IR-UTD vs IR-DSS
IR-UTD
IR-DSS
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Conclusions and Discussion• IR-DSS – High resolution, conventional
vehicle mounted IR
– Observe preservation needs, results
• IR-UTD • New tool for condition assessment
• Transient thermography
– Quantitative, Reproducible
– Determines depth
– No traffic control
– Deck, soffits, substructures
• Commercializing research results
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Questions / Comments
/Discussion?