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Thermal Imaging to Support Preservation Glenn Washer, University of Missouri October 2016
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Page 1: Thermal Imaging to Support Preservationpavementvideo.s3.amazonaws.com › 2016_MWBPP › 14... · Thermal Imaging to Support Preservation Glenn Washer, University of Missouri ...

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?


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