Browsing NTNU Open by Author "Hornbostel, Karla"
Now showing items 1-20 of 23
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25 years of field exposure of pre-cracked concrete beams; combined impact of spacers and cracks on reinforcement corrosion
Geiker, Mette Rica; Danner, Tobias; Michel, Alexander; Belda Revert, Andres; Linderoth, Oskar; Hornbostel, Karla (Peer reviewed; Journal article, 2021)The state of corrosion of three pre-cracked concrete beams was investigated after 25 years of marine exposure (atmospheric, tidal and submerged). The influence of inadequate plastic spacers was found to overrule the possible ... -
Carbonation-induced corrosion: Investigation of the corrosion onset
Revert, Andres Belda; De Weerdt, Klaartje; Hornbostel, Karla; Geiker, Mette Rica (Journal article; Peer reviewed, 2018)There are different views in the literature on the relationship between the location of the carbonation front and the onset of reinforcement corrosion. Theoretically, corrosion starts when the carbonation front reaches the ... -
Corrosion of prestressed tensile wires on Herøysund bridge
Bjerk, Christoffer Andresen (Master thesis, 2024)I denne avhandlingen blir teori og litteratur rundt korrosjon av karbonstål i ulike omgivelser og betong samt galvanisk korrosjon presentert. Deretter presenteres inspeksjoner og undersøkelser av Herøysund bro, hvor korrosjon ... -
Corrosion-induced damages and failures of posttensioned bridges: A literature review
Menga, Antonia; Kanstad, Terje; Cantero, Daniel; Bathen, Lise; Hornbostel, Karla; Klausen, Anja Birgitta Estensen (Peer reviewed; Journal article, 2022)Corrosion of posttensioned bridges raises great concern, since the only way to safely assess the condition of the tendons is through destructive evaluation. In this scenario, this paper presents the results of an extensive ... -
Crack characterization Field measurements
Almås, Anders Kårøy (Master thesis, 2016)The thesis examines if it is possible to use resistivity measurements done with a Wenner probe to estimate the crack depth in concrete. -
Cracking in concrete-debonding length at the concrete/steel interface
Kjeldby, Liv Brox (Master thesis, 2016)Investigation of the debonding length at the concrete/steel interface have been investigated based on different types of cracks in concrete. Different methods for investigation have been used in the laboratory. -
Debonding length in normal concrete and fiber reinforced concrete
Salvemini, Massimiliano (Master thesis, 2016)In this thesis work an investigation program on normal plain reinforced beams (NC) and fibre reinforced concrete (FRC) was performed. In the first part of the study several ways of investigation of the internal cracking ... -
Determination of the polarization resistance of steel in carbonated fly-ash concrete- effect of measurement technique
Revert, Andres Belda; Hornbostel, Karla; De Weerdt, Klaartje; Geiker, Mette Rica (Chapter, 2017)The polarization resistance (Rp) of a metal gives an indication of the corrosion condition at a given time. The Rp of embedded reinforcement in concrete is usually determined using the linear polarization resistance or the ... -
Durability aspects of cracks in concrete: field observations
Geiker, Mette Rica; Danner, Tobias; Hornbostel, Karla; Michel, Alexander (Chapter, 2019)The research presented in this paper briefly summarises findings from a project on impact of cracks on reinforcement corrosion within the Norwegian Public Roads Administration’s R&D program “Ferry-free coastal route E39”. ... -
Durability of pretensioned concrete girders in coastal climate bridges: Basis for better maintenance and future design
Paciorek, Magdalena Jadwiga; Kanstad, Terje; Hendriks, Max; Hornbostel, Karla; Markeset, Gro (Peer reviewed; Journal article, 2019) -
Electrical resistivity measurements in steel fibre reinforced cementitious materials
Berrocal, Carlos G.; Hornbostel, Karla; Geiker, Mette Rica; Löfgren, Ingemar; Lundgren, Karin; Bekas, Dimitrios G. (Journal article; Peer reviewed, 2018)This paper reports results from experiments aimed at better understanding the influence of fibre dosage and fibre geometry on the AC frequency needed to determine the DC resistivity of cementitious materials containing ... -
Influence of cracks and spacers on chloride penetration and reinforcement corrosion in concrete
Strømme, Øyvind (Master thesis, 2017)This thesis studies the influence of cracks and spacers on chloride penetration and reinforcement corrosion in concrete. The study was conducted in connection with the Norwegian Public Road Authorities (NPRA) E39 project, ... -
Inspection and Assessment of Corrosion in Pretensioned Concrete Bridge Girders Exposed to Coastal Climate
Osmolska, Magdalena Jadwiga; Hornbostel, Karla; Kanstad, Terje; Hendriks, Max; Markeset, Gro (Peer reviewed; Journal article, 2020)The most common methods for detecting chloride-induced corrosion in concrete bridges are half-cell potential (HCP) mapping, electrical resistivity (ER) measurements, and chloride concentration testing, combined with visual ... -
Macrocell corrosion in carbonated Portland and Portland-fly ash concrete - Contribution and mechanism
Belda Revert, Andres; Hornbostel, Karla; De Weerdt, Klaartje; Geiker, Mette Rica (Journal article, 2019)The corrosion of reinforcement in carbonated concrete with high moisture state was measured with and without electrical connection to reinforcement in non-carbonated concrete. The impact of the fly ash content and the ... -
Non-destructive Test Methods for Corrosion Detection in Reinforced Concrete Structures
Hornbostel, Karla; Danner, Tobias; Geiker, Mette Rica (Peer reviewed; Journal article, 2020)Several inspection methods can be used to assess the corrosion state of steel reinforcement in concrete. Especially for periodical field surveys and monitoring, non-destructive testing (NDT) methods are to be preferred as ... -
Overgangsmotstand i betong
Andersen, Kristine (Master thesis, 2013)Ved kloridinitiert korrosjon vil det oppstå lokale korrosjonsgroper på armeringen i betong. Særlig i begynnelsen av korrosjonsprosessen, vil forholdet mellom arealet til den lokale korrosjonsgropen (den lokale anoden), og ... -
Reinforcement corrosion in carbonated fly ash concrete
Revert, Andres Belda (Doctoral theses at NTNU;2018:230, Doctoral thesis, 2018)The cement industry contributes about 8% of the anthropogenic CO2 emissions, partly due to large consumption of cement and the emissions associated with the production (for Portland cement (PC) approximately 800 kg/t). One ... -
Repair Options for Corrosion-damaged Prestressed Concrete Structures
Sharma, Suraksha; Osmolska, Magdalena Jadwiga; Hornbostel, Karla; Bathen, Lise; Novakova, Iveta; Geiker, Mette Rica (Peer reviewed; Journal article, 2024)Prestressing of bridges allows construction of long spanned bridges made from thin structural members with high flexural and shear capacity. Studies have shown that some of the existing prestressed bridges are not meeting ... -
Resistance measurements of high resistance concrete
Thoresen, Ann-Marie (Master thesis, 2015)The importance of concrete resistivity in durability and service life aspects is widely recognized. Within this project, different measurement approaches were evaluated, with associated limitations and advantages. The ... -
Self-healing and Chloride Ingress in Cracked Cathodically Protected Concrete Exposed to Marine Environment for 33 Years
Danner, Tobias; Hornbostel, Karla; Strømme, Øyvind; Geiker, Mette Rica (Research report, 2019)Cracks facilitate ingress of aggressive substances. Depending on the exposure, this might lead to early reinforcement corrosion initiation. Possible self-healing of cracks may reduce their long-term impact, and conditions ...