A1297 hydro demolition video versus GPR results : east bound lane.

Sneed, Lesley; Anderson, Neil; Torgashov, Evgeniy; Missouri University of Science and Technology. Dept. of Civil, Architectural, and Environmental Engineering; Missouri University of Science and Technology. Dept. of Geological Sciences and Engineering

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A1297 hydro demolition video versus GPR results : east bound lane.

2014-03-01
By Sneed, Lesley ; Anderson, Neil ; Torgashov, Evgeniy

[Audio-Video-50.28 MB]

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English

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Details:

Creators:

Sneed, Lesley ; Anderson, Neil ; Torgashov, Evgeniy

Sneed, Lesley ; Anderson, Neil ; Torgashov, Evgeniy Less -
Corporate Creators:

Missouri University of Science and Technology. Dept. of Civil, Architectural, and Environmental Engineering ; Missouri University of Science and Technology. Dept. of Geological Sciences and Engineering

Missouri University of Science and Technology. Dept. of Civil, Architectural, and Environmental Engineering ; Missouri University of Science and Technology. Dept. of Geological Sciences and Engineering Less -
Corporate Contributors:

United States. Federal Highway Administration
Subject/TRT Terms:

[+]

Bridge Decks Concrete Bridges Data Collection Evaluation Ground Penetrating Radar Nondestructive Tests Portable Equipment Structural Health Monitoring
Publication/ Report Number:

TRyy1308
Resource Type:

Video
Geographical Coverage:

Missouri
Corporate Publisher:

Missouri. Dept. of Transportation. Research, Development and Technology Division
Abstract:

This research has examined the use of nondestructive techniques for concrete bridge deck condition

assessments. The primary nondestructive testing/evaluation (NDT/NDE) technique utilized in this research

was ground-coupled ground penetrating radar (GPR). The objectives of this research were to examine the

utility of the nondestructive techniques in evaluating the condition of MoDOT bridge decks to enable faster,

better, and more cost-effective bridge deck assessments, and to determine the accuracy of the information

provided.

Eleven bridge decks were investigated using detailed visual inspections, GPR, portable seismic property

analyzer (PSPA), core extraction, and chloride ion concentration measurements. The cores underwent a

detailed visual evaluation and testing to determine the volume of permeable pore space. Data sets were

compared to determine correlations between the results. Three of the bridge decks investigated underwent

rehabilitation by hydrodemolition after the initial investigation, and concrete material removal was surveyed

using lidar to evaluate the NDE estimations. Good correlation was observed qualitatively. Areas of the

decks where the GPR interpretations indicated evidence of extensive deterioration generally corresponded to

areas with greater concrete material removal depths after hydrodemolition, and areas where the GPR

interpretations indicated no evidence of deterioration generally corresponded to areas with minimal concrete

removal. Findings suggest that the correlation between the GPR interpretations and concrete removal depths

can be improved quantitatively by adjusting the GPR threshold values used in the interpretation, although

the major challenge will be to understand how to determine the threshold values without having the benefit

of the control data. Finally, recommended parameters are provided for ground-coupled GPR data acquisition, processing, and interpretation.
Format:

PDF
Alternate URL:

http://library.modot.mo.gov/RDT/reports/TRyy1308/Videos/ ; http://ntl.bts.gov/lib/51000/51500/51573/cmr14-010.pdf ;
Collection(s):

US Transportation Collection
Main Document Checksum:

[+]

urn:sha256:2ec45baaf297584954f2ee29d9420c9ff09d90eb24b9ddb58d3592ce90d868d8
Download URL:

https://rosap.ntl.bts.gov/view/dot/27146/dot_27146_DS1.avi
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A1297 hydro demolition video versus GPR results : east bound lane.

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