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Author(s):	Friese, Martin; Vogdt, Frank U.; Wiggenhauser, Herbert
Title:
Abstract:	Werden Risse in Betonbauteilen durch Verfüllen saniert, so lassen sich drei Kriterien zur Beurteilung des Erfolgs festlegen: die Kraftschlüssigkeit, die Wasserundurchlässigkeit und die Vollständigkeit der Füllung. Kraftschlüssigkeit und Wasserundurchlässigkeit lassen sich relativ einfach am sanierten Bauteil überprüfen, die Prüfung auf Vollständigkeit der Füllung kann derzeit nur zerstörend durch Entnahme von Bohrkernen erfolgen. Mit fortgeschrittenen, bildgebenden Ultraschallverfahren lassen sich für Füllgüter auf Zementbasis (Zementleim, Zementsuspension) sowie Epoxidharz signifikante Unterschiede zwischen offenen, teilweise verfüllten und vollständig verfüllten Rissen feststellen. Quality control for crack repair: a new approach using ultrasonic imaging If cracks in concrete elements are repaired by filling them with epoxy, polyurethane or a cement based filler, there are three criteria for the repair quality: there should be a non-positive connection between the crack's edges, the repaired crack should be watertight, and it should be completely filled. While the first two criteria can easily be verified, to date the only way to get information about the completeness of the filling has been to drill cores. By applying advanced ultrasonic imaging techniques, significant differences between empty, partially filled and completely filled cracks can be observed for epoxy or cement based fillers.
Source:	Beton- und Stahlbetonbau 106 (2011), No. 7
Page/s:	471-480
Language of Publication:	German

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