Non-Contact NDT of Concrete Structures Using Air -Coupled Sensors
Zhu, Jinying
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https://hdl.handle.net/2142/83296
Description
Title
Non-Contact NDT of Concrete Structures Using Air -Coupled Sensors
Author(s)
Zhu, Jinying
Issue Date
2006
Doctoral Committee Chair(s)
Popovics, John
Department of Study
Civil and Environmental Engineering
Discipline
Civil and Environmental Engineering
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Engineering, Civil
Language
eng
Abstract
The second application is air-coupled impact-echo. Two reinforced concrete slabs containing different types of defects were inspected using an air-coupled impact test testing scheme. 2-D scanning impact-echo tests were conducted over the slab containing voids and delaminations. The 2-D scanning image clearly shows the location and depths of embedded defects. Air-coupled impact-echo is also applied to examine the grouting condition of embedded ducts. The poorly-grouted sections are identified within the metal duct.
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