Rebar corrosion monitoring using novel embedded filament mini-sensors

Holst, Alexander; Bruder, Stefan; Hariri, Karim; Budelmann, Harald

doi:10.1201/9781439828441.ch172

Cited by 3 publications

(4 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Essential findings of various extensive long-term corrosion tests with filament sensors and the practical verification on first real-sized members have already been published in Holst et al (2007), Budelmann and Holst (2008) and Holst and Budelmann (2010). Based on this, the authors can state that the versatile sensor is nearly universally usable for permanent corrosion monitoring of RC and PC structures with an automated data acquisition device as well as for sporadic measurements during regular visual inspections by means of a handheld ohmmeter.…”

Section: Discussionmentioning

confidence: 95%

“…As seen in Figure 8, the corrosion-induced interruption of each wire causes a significant steplike rise of the measured sensor resistance (Holst et al, 2007). The measured sensor resistance R of a corrosion sensor with n filaments representing a shunt circuit can be calculated as follows:…”

Section: Structure and Infrastructure Engineering 497mentioning

confidence: 99%

“…The optimisation of the grout properties in terms of good permeability, durability and mechanical connection is of great concern but still a subject of research. For durable protection, the outer front side of the sensor will be finally covered by epoxy sealing sprinkled with sand (Holst, Hariri, Budelmann, & Bruder, 2007).…”

Section: Structure and Infrastructure Engineering 497mentioning

confidence: 99%

See 2 more Smart Citations

Non-destructive measurement toolkit for corrosion monitoring and fracture detection of bridge tendons

Budelmann

Holst

Wichmann

2013

Structure and Infrastructure Engineering

View full text Add to dashboard Cite

One of the most considerable challenges of building management is to ensure the integrity and the functionality of prestressed members during service life. But particularly corrosive and mechanical influences on the prestressing steel reinforcement strongly impair the long-term performance and durability of interior as well as of exterior tendons in concrete bridges and of other prestressed structures. The durability state and degradation of tendons can be assessed primarily on the basis of the tendon's force, the corrosion state and the existence of steel fractures. For the determination of these parameters, this paper will briefly report on the application and practical verification of a measurement toolkit, which is used for monitoring, inspecting and testing of prestressed concrete elements, with main consideration of prestressed tendons in bridges. This toolbox comprises conventional inspection and several innovative measurement and monitoring techniques, which have been developed, tested and optimised by the authors in the last decade.

show abstract

Section: Discussionmentioning

confidence: 95%

Section: Structure and Infrastructure Engineering 497mentioning

confidence: 99%

Section: Structure and Infrastructure Engineering 497mentioning

confidence: 99%

See 1 more Smart Citation

Non-destructive measurement toolkit for corrosion monitoring and fracture detection of bridge tendons

Budelmann

Holst

Wichmann

2013

Structure and Infrastructure Engineering

View full text Add to dashboard Cite

show abstract

“…Dies zeigt ein inverses Verhalten zwischen Elektrolyten und Metall sowie einen nachhaltigeren Temperatureinfluss bei wässrigen Lösungen. Aufgrund der ausgezeichneten Temperaturstabilität der verwendeten SMD-Vorwiderstände (±0,01 %/°C) ergibt sich eine Temperaturabhängigkeit des gemessenen Sensorwiderstands erst dann, wenn alle Drähte eines Multidrahtsensors gebrochen sind [28]. Diese Tendenz ist exemplarisch aus Bild 6 für 8-Drahtsensoren mit 0,065 mm dicken Eisendrähten ersichtlich.…”

Section: Temperaturabhängigkeitunclassified

Korrosionsmonitoring von Stahlbetonbauwerken als Element des Lebensdauermanagements

Holst

Budelmann

Wichmann

2010

Beton und Stahlbetonbau

View full text Add to dashboard Cite

Da korrosionsinduzierte Schäden an Bauwerken im Laufe der Zeit zu immensen Kosten führen, sind die sichere Beurteilung des Korrosionsrisikos und eine frühzeitige Erkennung und zuverlässige Vorhersage der Bewehrungskorrosion Schlüsselaufgaben des Bauwerksmanagements korrodierender Spann‐ und Stahlbetonbauwerke. Eine Bewertung des Korrosionszustands wird durch die Bauwerksüberwachung (Monitoring) objektiv möglich.Im vorliegenden Beitrag werden nach einer kurzen Einführung zum monitoringbasierten Lebensdauermanagement die Entwicklung, Erprobung und Optimierung neuartiger kalibrierungsfreier Miniatursensoren zur Erfassung der Bewehrungskorrosion in Betonbauteilen vorgestellt. Mit diesen vielseitig einsetzbaren Korrosionsstellvertretersensoren, die aus mehreren im Bereich der Betonüberdeckung angeordneten, 0,065 mm bis ca. 0,5 mm dünnen Stahldrähten bestehen, kann das Eindringen der Depassivierungsfront in den Beton einfach, zuverlässig und kostengünstig überwacht werden. Basierend auf umfangreichen Untersuchungen im Labormaßstab und der Anwendungserprobung im Zeitraum von mehr als sechs Jahren werden die Erkenntnisse und Weiterentwicklungen der Drahtsensorik präsentiert und diskutiert.Corrosion Monitoring as an Element of Service‐Life‐ManagementApplication of innovative filament sensors for rebar corrosion survey Since corrosion induced damages at civil structures result in enormous costs over lifetime, the assured assessment of the corrosion risk and an early identification and reliable prognosis of rebar corrosion are key tasks of the building management of corroding prestressed and steel reinforced concrete structures. Here an evaluation of the corrosion state is objectively possible by means of Structural Health Monitoring (SHM).In this contribution after a brief introduction of monitoring based service‐life‐management, the development, testing and optimization of novel calibration‐free miniature sensors for the detection of rebar corrosion in concrete members are introduced. By means of these versatile corrosion dummy sensors, made from several 0,065 mm up to 0,5 mm thin steel filaments and mounted within the concrete cover, the penetration of the depassivation front into concrete can be observed easily, reliably and cost effectively. Based upon various investigations in the lab scale and application testing during the time period of six years, the findings and further developments of the filament sensor will be presented and discussed.

show abstract

Säureangriff auf Beton – Monitoring des Schädigungsfortschritts

Schießl¹,

Mayer

2012

Baustoff Und Konstruktion

View full text Add to dashboard Cite

Rebar corrosion monitoring using novel embedded filament mini-sensors

Cited by 3 publications

References 0 publications

Non-destructive measurement toolkit for corrosion monitoring and fracture detection of bridge tendons

Non-destructive measurement toolkit for corrosion monitoring and fracture detection of bridge tendons

Korrosionsmonitoring von Stahlbetonbauwerken als Element des Lebensdauermanagements

Säureangriff auf Beton – Monitoring des Schädigungsfortschritts

Contact Info

Product

Resources

About