Precise Thermal NDE for Quantifying Structural Damage

Grande, N.K. Del; Durbin, Philip F.

doi:10.1007/978-1-4613-0383-1_67

Cited by 8 publications

(4 citation statements)

References 6 publications

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“…[22][23][24][25] We constructed small-scale surrogate bridge decks using concrete and asphalt-concrete slabs. Two nearly identical concrete test slabs were cast in January 1994.…”

Section: Feasibility Study Using Surrogate Bridge Decksmentioning

confidence: 99%

“…Later, we developed image-processing methods to unmask synthetic delaminations and remove surface clutter. The temperature images were processed using the VIEW computer [22][23][24][25] code developed at LLNL.…”

Section: Feasibility Study Using Surrogate Bridge Decksmentioning

confidence: 99%

“…Airframematerial loss from corrosion under 1 or 2 mm of exposed aluminum skin1523 . Synthetic bridge-deck delaminations, 5 and 10 cm deep, in concrete and asphalt-concrete slabs [22][23][24][25] . Bridge delaminations recorded from a mobile inspection laboratory and later confirmed by pavement removal 2628…”

Section: Introductionmentioning

confidence: 99%

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<title>Delamination detection in reinforced concrete using thermal inertia</title>

DelGrande

Durbin

1999

SPIE Proceedings

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We investigated the feasibility of thermal inertia mapping for bridge deck inspections. Using pulsed thermal imaging, we heat-stimulated surrogate delaminations in reinforced concrete and asphalt-concrete slabs. Using a dual-band infrared camera system, we measured thermal inertia responses of Styrofoam implants under 5 cm of asphalt, 5 cm of concrete, and 10 cm of asphalt and concrete. We compared thermal maps from solar-heated concrete and asphalt-concrete slabs with thermal inertia maps from flash-heated concrete and asphalt-concrete slabs. Thermal inertia mapping is a tool for visualizing and quantifying subsurface defects. Physically, thermal inertia is a measure of the resistance of the bridge deck to temperature change. Experimentally, it is determined from the inverse slope of the surface temperature versus the inverse square root of time. Mathematically, thermal inertia is the square root of the product of thermal conductivity, density, and heat capacity. Thermal inertia mapping distinguishes delaminated decks which have below-average thermal inertias from normal or shaded decks.

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“…[22][23][24][25] We constructed small-scale surrogate bridge decks using concrete and asphalt-concrete slabs. Two nearly identical concrete test slabs were cast in January 1994.…”

Section: Feasibility Study Using Surrogate Bridge Decksmentioning

confidence: 99%

Section: Feasibility Study Using Surrogate Bridge Decksmentioning

confidence: 99%

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<title>Delamination detection in reinforced concrete using thermal inertia</title>

DelGrande

Durbin

1999

SPIE Proceedings

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“…Every NDE method involves a certain type of energy source for inspection. This energy could be ultrasonic [3,4], electromagnetic [5][6][7][8], thermal [9][10][11] or radiographic [2,12]. The incident energy from the source interacts with the test specimen depending on the governing physical phenomena.…”

Section: Nondestructive Evaluationmentioning

confidence: 99%

NDE data fusion using morphological approaches

Song¹

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This manuscript has been reproduced from the microfihn master. UMI films the text directly from the original or copy submitted. Thus, some thesis and dissertation copies are in typewriter &ce, while others may be from any type of computer printer. The quality of this reproduction is dependent upon the quality of the copy submitted. Broken or indistinct print, colored or poor quality illustrations and photographs, print bleedthrough, substandard margins, and improper alignment can adversely affect reproduction. In the unlikely event that the author did not send UMI a complete manuscript and there are missing pages, these will be noted. Also, if unauthorized copyright material had to be removed, a note will indicate the deletion. Oversize materials (e.g., maps, drawings, charts) are reproduced by sectioning the original, beginning at the upper left-hand comer and continuing from left to right in equal sections with small overlaps. Each original is also photographed in one exposure and is included in reduced form at the back of the book. Photographs included in the original manuscript have been reproduced xerographically in this copy. £Bgher quality 6" x 9" black and white photographic prints are available for any photographs or illustrations appearing in this copy for an additional charge. Contact UMI directly to order. UMI A Bell & Howell Infonnation Company 300 North Zed> Road, Ann Arbor MI 48106-1346 USA 313/761-4700 800/521-0600 NDE data fusion using morphological approaches by Young-Won Song A dissertation submitted to the graduate faculty in partial fulfillment of the requirements for the degree of

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On the proposal of quantitative temperature measurement by using three-color technique combined with several infrared sensors having different detection wavelength bands

Inagaki

Ishii

2000

Infrared Physics & Technology

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Precise Thermal NDE for Quantifying Structural Damage

Cited by 8 publications

References 6 publications

<title>Delamination detection in reinforced concrete using thermal inertia</title>

<title>Delamination detection in reinforced concrete using thermal inertia</title>

NDE data fusion using morphological approaches

On the proposal of quantitative temperature measurement by using three-color technique combined with several infrared sensors having different detection wavelength bands

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