% IMPORTANT: The following is UTF-8 encoded. This means that in the presence
% of non-ASCII characters, it will not work with BibTeX 0.99 or older.
% Instead, you should use an up-to-date BibTeX implementation like “bibtex8” or
% “biber”.
@PHDTHESIS{Asgharzadeh:762287,
author = {Asgharzadeh, Amir},
othercontributors = {Raupach, Michael and Zander, Brita Daniela},
title = {{D}urability of polymer impregnated carbon textiles as {CP}
anode for reinforced concrete},
school = {Rheinisch-Westfälische Technische Hochschule Aachen},
type = {Dissertation},
address = {Aachen},
reportid = {RWTH-2019-05559},
pages = {1 Online-Ressource},
year = {2019},
note = {Veröffentlicht auf dem Publikationsserver der RWTH Aachen
University; Dissertation, Rheinisch-Westfälische Technische
Hochschule Aachen, 2019, Kumulative Dissertation},
abstract = {Damage to reinforced concrete structures causes immense
economic losses every year. Costs due to failure of
structures and their repair measures are immense. Much of
this damage is due to the corrosive environment of
reinforced concrete structures. One option for repairing
corrosion-damaged components is cathodic corrosion
protection. In cathodic corrosion protection, the
reinforcing steel is forced to act cathodically and thus the
dissolution of the reinforcing steel is reduced to harmless
levels. The cathodic effect can be achieved for example by
the attachment of an impressed current anode where the
partial oxidation reactions are shifted to the external
anode. Widely used in cathodic corrosion protection are
mixed metal oxide (MMO) coated titanium meshes. Currently,
the use of anodes made of carbon textile is being developed,
which are of particular interest due to their excellent
mechanical properties, low weight and crack bridging
ability. Additionally, carbon textile is electrically
conductive and its functionality as a CP anode has already
been validated at the Institute of Building Materials
Research (ibac) of the RWTH Aachen University. Carbon,
according to the Pourbaix diagram , is not chemically
resistant, and can corrode. Therefore, durability studies
were required to determine the suitability of carbon as a
long term anode material for cathodic protection of steel in
concrete. The aim of this thesis is to investigate the
durability of carbon textile under anodic polarization. The
experiments were carried out using a simulated pore solution
and mortar. The influence of anodic polarization on carbon
textiles was investigated. The behavior of unconsumed carbon
textile under anodic polarization in alkaline solution was
characterized by current density-potential curves through
potentiodynamic experiments. SEM images were used to detect
decomposition of the sizing of the carbon filaments which
was attributed to anodic polarization. Further tests in
solution and further SEM images showed that impregnated
carbon textiles degraded the epoxy and SBR impregnations. A
degradation of the carbon fibers themselves could not be
achieved for potentials up to 2200 mV vs. NHE. The
decomposition of the sizing and epoxy matrix presumably
occurs in the transition region of its current
density-potential curves at potentials of about 900 mV vs.
NHE and 1050-1150 mV vs. NHE. The SBR impregnation is
decomposed at potentials of 490 mV vs. NHE. After 240 days
of potentiostatic polarization, no visible damage has
occurred to the mortar test specimens. However, the bond
between carbon textiles and mortar as well as stress
corrosion cracking of carbon textiles under anodic
polarization was not investigated.},
cin = {311110 / 522710 / 520000},
ddc = {624},
cid = {$I:(DE-82)311110_20160603$ / $I:(DE-82)522710_20140620$ /
$I:(DE-82)520000_20140620$},
typ = {PUB:(DE-HGF)11},
doi = {10.18154/RWTH-2019-05559},
url = {https://publications.rwth-aachen.de/record/762287},
}
guest ::