2026-09-20T21:15:34Z https://www.ideals.illinois.edu/oai-pmh

oai:www.ideals.illinois.edu:2142/83296 2023-07-11 col_2142_5131 col_2142_14770 com_2142_5130 com_2142_3518 com_2142_234

Popovics, John Zhu, Jinying 2015-09-25T21:04:08Z 2015-09-25T21:04:08Z 10000-01-01 2006 2006 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. Made available in DSpace on 2015-09-25T21:04:08Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 3223768.pdf: 3467858 bytes, checksum: 773584a481762c6be1aed59ee3598d9b (MD5) Previous issue date: 2006 Embargo set by: Seth Robbins for item 84577 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs U of I Only 107 p. Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2006. http://hdl.handle.net/2142/83296 (MiAaPQ)AAI3223768 eng Engineering, Civil Non-Contact NDT of Concrete Structures Using Air -Coupled Sensors text Civil and Environmental Engineering Civil and Environmental Engineering University of Illinois at Urbana-Champaign Dissertation Ph.D.