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dc.contributor.author
Angst, Ueli M.
dc.contributor.author
Boschmann, Carolina
dc.contributor.author
Wagner, Matthias
dc.contributor.author
Elsener, Bernhard
dc.date.accessioned
2018-01-24T10:50:39Z
dc.date.available
2017-11-24T08:24:40Z
dc.date.available
2018-01-24T10:49:33Z
dc.date.available
2018-01-24T10:50:39Z
dc.date.issued
2017-08
dc.identifier.issn
1940-087X
dc.identifier.other
10.3791/56229
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/213327
dc.identifier.doi
10.3929/ethz-b-000213327
dc.description.abstract
The aging of reinforced concrete infrastructure in developed countries imposes an urgent need for methods to reliably assess the condition of these structures. Corrosion of the embedded reinforcing steel is the most frequent cause for degradation. While it is well known that the ability of a structure to withstand corrosion depends strongly on factors such as the materials used or the age, it is common practice to rely on threshold values stipulated in standards or textbooks. These threshold values for corrosion initiation (Ccrit) are independent of the actual properties of a certain structure, which clearly limits the accuracy of condition assessments and service life predictions. The practice of using tabulated values can be traced to the lack of reliable methods to determine Ccrit on-site and in the laboratory. Here, an experimental protocol to determine Ccrit for individual engineering structures or structural members is presented. A number of reinforced concrete samples are taken from structures and laboratory corrosion testing is performed. The main advantage of this method is that it ensures real conditions concerning parameters that are well known to greatly influence Ccrit, such as the steel-concrete interface, which cannot be representatively mimicked in laboratory-produced samples. At the same time, the accelerated corrosion test in the laboratory permits the reliable determination of Ccrit prior to corrosion initiation on the tested structure; this is a major advantage over all common condition assessment methods that only permit estimating the conditions for corrosion after initiation, i.e., when the structure is already damaged. The protocol yields the statistical distribution of Ccrit for the tested structure. This serves as a basis for probabilistic prediction models for the remaining time to corrosion, which is needed for maintenance planning. This method can potentially be used in material testing of civil infrastructures, similar to established methods used for mechanical testing.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
JoVE
en_US
dc.rights.uri
http://creativecommons.org/licenses/by-nc-nd/3.0/
dc.subject
Engineering
en_US
dc.subject
Issue 126
en_US
dc.subject
Corrosion
en_US
dc.subject
chlorides
en_US
dc.subject
chloride threshold
en_US
dc.subject
critical chloride content
en_US
dc.subject
infrastructure
en_US
dc.subject
concrete
en_US
dc.subject
reinforcing steel
en_US
dc.subject
durability
en_US
dc.subject
service life
en_US
dc.title
Experimental Protocol to Determine the Chloride Threshold Value for Corrosion in Samples Taken from Reinforced Concrete Structures
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported
dc.date.published
2017-08-31
ethz.journal.title
Journal of Visualized Experiments. JoVE
ethz.journal.volume
126
en_US
ethz.journal.abbreviated
J Vis Exp
ethz.pages.start
e56229
en_US
ethz.size
11 p.
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.identifier.wos
ethz.publication.place
Somerville, MA
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02115 - Dep. Bau, Umwelt und Geomatik / Dep. of Civil, Env. and Geomatic Eng.::02606 - Institut für Baustoffe (IfB) / Institute for Building Materials::09593 - Angst, Ueli (SNF-Professur) / Angst, Ueli (SNF-Professur)
en_US
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02115 - Dep. Bau, Umwelt und Geomatik / Dep. of Civil, Env. and Geomatic Eng.::02606 - Institut für Baustoffe (IfB) / Institute for Building Materials::09593 - Angst, Ueli (SNF-Professur) / Angst, Ueli (SNF-Professur)
en_US
ethz.date.deposited
2017-11-24T08:24:47Z
ethz.source
FORM
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2018-01-24T10:49:38Z
ethz.rosetta.lastUpdated
2018-11-06T07:18:58Z
ethz.rosetta.exportRequired
true
ethz.rosetta.versionExported
true
ethz.COinS
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