Evaluation of a Concrete Slab Track with Debonding at the Interface between Track Concrete Layer and Hydraulically Stabilized Base Course Using Multi-Channel Impact-Echo Testing

Multi-channel Impact-echo (IE) testing was used to evaluate debonding defects at the interface between track concrete layer, TCL, and hydraulically stabilized base course, HSB, in a real scale mockup model of concrete slab tracks for Korea high-speed railway (KHSR) system. The mockup model includes...

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Autores principales:	Jin-Wook Lee, Sung-Jin Lee, Seong-Hoon Kee
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	concrete slab track debonding defects multi-channel IE testing data reduction non-destructive evaluation Chemical technology TP1-1185
Acceso en línea:	https://doaj.org/article/d4fdc218b80a4f85a77c19d40934fa31
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id	oai:doaj.org-article:d4fdc218b80a4f85a77c19d40934fa31
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spelling	oai:doaj.org-article:d4fdc218b80a4f85a77c19d40934fa312021-11-11T19:06:22ZEvaluation of a Concrete Slab Track with Debonding at the Interface between Track Concrete Layer and Hydraulically Stabilized Base Course Using Multi-Channel Impact-Echo Testing10.3390/s212170911424-8220https://doaj.org/article/d4fdc218b80a4f85a77c19d40934fa312021-10-01T00:00:00Zhttps://www.mdpi.com/1424-8220/21/21/7091https://doaj.org/toc/1424-8220Multi-channel Impact-echo (IE) testing was used to evaluate debonding defects at the interface between track concrete layer, TCL, and hydraulically stabilized base course, HSB, in a real scale mockup model of concrete slab tracks for Korea high-speed railway (KHSR) system. The mockup model includes three debonding defects that were fabricated by inserting three 400 mm by 400 mm (length and width) thin plastic foam boards with three different thicknesses of 5 mm, 10 mm, and 15 mm, before casting concrete in TCL. Multi-channel IE signals obtained over solid concrete and debonding defects were reduced to three critical IE testing parameters (the velocity of concrete, peak frequency, and <i>Q</i> factor). Bilinear classification models were used to evaluate the individual and a combination of the characteristic parameters. It was demonstrated that the best evaluation performance was obtained by using average peak frequency or the combination of average peak frequency and average <i>Q</i> factor, obtained by eight accelerometers in the multi-channel IE device. The results and discussion in this study would improve the understanding of characteristics of multiple IE testing parameters in concrete slab tracks and provide a fundamental basis to develop an effective prediction model of non-destructive evaluation for debonding defects at the interface between TCL and HSB in concrete slab tracks.Jin-Wook LeeSung-Jin LeeSeong-Hoon KeeMDPI AGarticleconcrete slab trackdebonding defectsmulti-channel IE testingdata reductionnon-destructive evaluationChemical technologyTP1-1185ENSensors, Vol 21, Iss 7091, p 7091 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	concrete slab track debonding defects multi-channel IE testing data reduction non-destructive evaluation Chemical technology TP1-1185
spellingShingle	concrete slab track debonding defects multi-channel IE testing data reduction non-destructive evaluation Chemical technology TP1-1185 Jin-Wook Lee Sung-Jin Lee Seong-Hoon Kee Evaluation of a Concrete Slab Track with Debonding at the Interface between Track Concrete Layer and Hydraulically Stabilized Base Course Using Multi-Channel Impact-Echo Testing
description	Multi-channel Impact-echo (IE) testing was used to evaluate debonding defects at the interface between track concrete layer, TCL, and hydraulically stabilized base course, HSB, in a real scale mockup model of concrete slab tracks for Korea high-speed railway (KHSR) system. The mockup model includes three debonding defects that were fabricated by inserting three 400 mm by 400 mm (length and width) thin plastic foam boards with three different thicknesses of 5 mm, 10 mm, and 15 mm, before casting concrete in TCL. Multi-channel IE signals obtained over solid concrete and debonding defects were reduced to three critical IE testing parameters (the velocity of concrete, peak frequency, and <i>Q</i> factor). Bilinear classification models were used to evaluate the individual and a combination of the characteristic parameters. It was demonstrated that the best evaluation performance was obtained by using average peak frequency or the combination of average peak frequency and average <i>Q</i> factor, obtained by eight accelerometers in the multi-channel IE device. The results and discussion in this study would improve the understanding of characteristics of multiple IE testing parameters in concrete slab tracks and provide a fundamental basis to develop an effective prediction model of non-destructive evaluation for debonding defects at the interface between TCL and HSB in concrete slab tracks.
format	article
author	Jin-Wook Lee Sung-Jin Lee Seong-Hoon Kee
author_facet	Jin-Wook Lee Sung-Jin Lee Seong-Hoon Kee
author_sort	Jin-Wook Lee
title	Evaluation of a Concrete Slab Track with Debonding at the Interface between Track Concrete Layer and Hydraulically Stabilized Base Course Using Multi-Channel Impact-Echo Testing
title_short	Evaluation of a Concrete Slab Track with Debonding at the Interface between Track Concrete Layer and Hydraulically Stabilized Base Course Using Multi-Channel Impact-Echo Testing
title_full	Evaluation of a Concrete Slab Track with Debonding at the Interface between Track Concrete Layer and Hydraulically Stabilized Base Course Using Multi-Channel Impact-Echo Testing
title_fullStr	Evaluation of a Concrete Slab Track with Debonding at the Interface between Track Concrete Layer and Hydraulically Stabilized Base Course Using Multi-Channel Impact-Echo Testing
title_full_unstemmed	Evaluation of a Concrete Slab Track with Debonding at the Interface between Track Concrete Layer and Hydraulically Stabilized Base Course Using Multi-Channel Impact-Echo Testing
title_sort	evaluation of a concrete slab track with debonding at the interface between track concrete layer and hydraulically stabilized base course using multi-channel impact-echo testing
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/d4fdc218b80a4f85a77c19d40934fa31
work_keys_str_mv	AT jinwooklee evaluationofaconcreteslabtrackwithdebondingattheinterfacebetweentrackconcretelayerandhydraulicallystabilizedbasecourseusingmultichannelimpactechotesting AT sungjinlee evaluationofaconcreteslabtrackwithdebondingattheinterfacebetweentrackconcretelayerandhydraulicallystabilizedbasecourseusingmultichannelimpactechotesting AT seonghoonkee evaluationofaconcreteslabtrackwithdebondingattheinterfacebetweentrackconcretelayerandhydraulicallystabilizedbasecourseusingmultichannelimpactechotesting
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Evaluation of a Concrete Slab Track with Debonding at the Interface between Track Concrete Layer and Hydraulically Stabilized Base Course Using Multi-Channel Impact-Echo Testing

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