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Water migration in one-side heated concrete: 4D in-situ CT monitoring of the moisture-clog-effect
- Explosive spalling due to fire exposure in concrete structures can lead severe damage and, in the worst case, to premature component failure. For this reason, an in situ investigation of water Migration in concrete due to surface heating was undertaken. During these experiments, a miniaturized concrete specimen within a confining and insulating double-hull was subjected to surface heating during simultaneous X-ray computed tomography (CT) scanning. Through the use of subtraction-based Image analysis techniques, it was possible to observe and quantify not only drying within areas of the concrete matrix close to the heated surface, but also the migration of moisture to both pore and matrix regions deeper within the specimen. It was also discovered that the correction of CT images for specimen deformation using DVC and variable detector performance using calibrated image filters significantly improved the quality of the results. This clearly demonstrates the potential of X-ray CT forExplosive spalling due to fire exposure in concrete structures can lead severe damage and, in the worst case, to premature component failure. For this reason, an in situ investigation of water Migration in concrete due to surface heating was undertaken. During these experiments, a miniaturized concrete specimen within a confining and insulating double-hull was subjected to surface heating during simultaneous X-ray computed tomography (CT) scanning. Through the use of subtraction-based Image analysis techniques, it was possible to observe and quantify not only drying within areas of the concrete matrix close to the heated surface, but also the migration of moisture to both pore and matrix regions deeper within the specimen. It was also discovered that the correction of CT images for specimen deformation using DVC and variable detector performance using calibrated image filters significantly improved the quality of the results. This clearly demonstrates the potential of X-ray CT for evaluation of other rapid-density-change phenomena in concrete and other building materials.…
Autor*innen: | Bartosz Powierza, Ludwig StelznerORCiD, Tyler OeschORCiD, Christian Gollwitzer, Frank WeiseORCiD, Giovanni BrunoORCiD |
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Dokumenttyp: | Zeitschriftenartikel |
Veröffentlichungsform: | Verlagsliteratur |
Sprache: | Englisch |
Titel des übergeordneten Werkes (Englisch): | Journal of Nondestructive Evaluation |
Jahr der Erstveröffentlichung: | 2019 |
Organisationseinheit der BAM: | 7 Bauwerkssicherheit |
7 Bauwerkssicherheit / 7.1 Baustoffe | |
8 Zerstörungsfreie Prüfung | |
8 Zerstörungsfreie Prüfung / 8.5 Röntgenbildgebung | |
Herausgeber (Institution): | Springer Nature |
Verlag: | Springer US |
Verlagsort: | New York / Heidelberg |
Jahrgang/Band: | 38 |
Ausgabe/Heft: | 1 |
Erste Seite: | 15, 1 |
Letzte Seite: | 11 |
DDC-Klassifikation: | Technik, Medizin, angewandte Wissenschaften / Ingenieurwissenschaften / Ingenieurwissenschaften und zugeordnete Tätigkeiten |
Freie Schlagwörter: | Digital Volume Correlation; Fire; Heated concrete; In-Situ X-ray CT; Water migration |
Themenfelder/Aktivitätsfelder der BAM: | Material |
Material / Degradation von Werkstoffen | |
Veranstaltung: | 8th Conference on Industrial Computed Tomography (iCT 2018) |
Veranstaltungsort: | Wels, Austria |
Beginndatum der Veranstaltung: | 06.02.2018 |
Enddatum der Veranstaltung: | 09.02.2018 |
DOI: | 10.1007/s10921-018-0552-7 |
ISSN: | 1573-4862 |
ISSN: | 0195-9298 |
Verfügbarkeit des Dokuments: | Datei im Netzwerk der BAM verfügbar ("Closed Access") |
Datum der Freischaltung: | 08.01.2019 |
Referierte Publikation: | Ja |
Datum der Eintragung als referierte Publikation: | 08.01.2019 |