Browsing NTNU Open by Author "Geiker, Mette Rica"
Now showing items 1-20 of 96
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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 ... -
5 years of in situ reinforcement corrosion monitoring in the splash and submerged zone of a cracked concrete element
Michel, Alexander; Sørensen, Henrik E.; Geiker, Mette Rica (Peer reviewed; Journal article, 2021)Results of more than 5 years of in situ reinforcement corrosion monitoring are presented including continuous measurements of concrete resistivity, temperature, and open circuit corrosion potential measurements. Depth ... -
A numerical investigation of the cracking behaviour of reinforced-concrete tie elements
Tan, Jesus Reignard Medel; Hendriks, Max; Geiker, Mette Rica; Kanstad, Terje (Journal article; Peer reviewed, 2018)The cracking behaviours of reinforced-concrete (RC) ties are investigated by conducting virtual experiments using non-linear finite-element analysis. The assumptions in the model are verified by benchmarking the classical ... -
Analytical Calculation Model for Predicting Cracking Behavior of Reinforced Concrete Ties
Tan, Jesus Reignard Medel; Hendriks, Max; Geiker, Mette Rica; Kanstad, Terje (Journal article; Peer reviewed, 2020)This paper formulates an analytical calculation model for predicting the cracking behavior of reinforced concrete ties to provide more consistent crack width calculation methods for large-scale concrete structures in which ... -
Betongens rolle i brannsikre tunneler - En vurdering av konstruksjonens brannmotstand i norske veitunneler
Salvesen, Elin Nordby (Master thesis, 2016)Betong utøver generelt god brannmotstand, og utgjør en viktig del av den passive brannsikringen ved å være en del av bergsikringen og vann- og frostsikringen (V/F-sikringen) i en tunnelkonstruksjon. For betong som bergsikring ... -
Beyond the chloride threshold concept for predicting corrosion of steel in concrete
Angst, Ueli M; Isgor, Burkan; Hansson, Carolyn M; Sagues, Alberto; Geiker, Mette Rica (Peer reviewed; Journal article, 2022)All existing models to forecast the corrosion performance of reinforced concrete structures exposed to chloride environments are based on one common theoretical concept, namely, a chloride threshold, as a sharply defined ... -
Carbonation and corrosion of steel in fly ash concrete, concluding investigation of five-year-old laboratory specimens and preliminary field data
Revert, Andres Belda; Danner, Tobias; Geiker, Mette Rica (Journal article; Peer reviewed, 2024)Carbonation development and reinforcement corrosion were investigated on concretes exposed for a five-year period at 90% RH, 20 ℃, and 5% CO2, and for a six-year period at natural carbonation. Portland cement-based binders ... -
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 ... -
Cement sheath modification using nanomaterials for long-term zonal isolation of oil wells: Review
Jafariesfad, Narjes; Geiker, Mette Rica; Gong, Yi; Skalle, Pål; Zhang, Zhiliang; He, Jianying (Journal article; Peer reviewed, 2017)Well cementing is an important operation during drilling and completion of oil wells. The cement sheath must maintain well integrity behind the casing and provide long-term zonal isolation to ensure safety and prevent ... -
Chloride Ingress Determination in Offshore Concrete Structures Using µ-XRF
Slotten, Joachim; Vådahl, Erik Bjørnstad (Master thesis, 2019)Formålet med denne masteroppgaven var å se nærmere på µ-XRF som målemetode for kloridinntrenging i offshore betongkonstruksjoner. For å evaluere bruk av µ-XRF til dette formålet, ble den sammenlignet med to andre analysemetoder: ... -
Chloride Ingress in Concrete - A Sensitivity Analysis of the Input Parameters in the fib Model for Chloride Ingress and a Validation of the Model for Short Exposure Times
Nissen, Thomas (Master thesis, 2016)Chloride transport in concrete is a rather complex process. There are numerous different models one can use to estimate chloride ingress in concrete. The fib model code presents a model based on an error function solution ... -
Chloride-binding capacity of hydrotalcite in cement pastes containing dolomite and metakaolin
Machner, Alisa; Zajac, Maciej; Ben Haha, Mohsen; Kjellsen, Knut Ose; Geiker, Mette Rica; De Weerdt, Klaartje (Journal article; Peer reviewed, 2018)In this study, we investigated well-hydrated cement pastes containing dolomite and metakaolin cured at 38 °C or 60 °C, which were exposed to NaCl or CaCl2 solutions of various concentrations. We determined the chloride-binding ... -
Clays as SCM – Reactivity of Uncalcined Kaolinite and Bentonite, and Impact on Phase Assemblage and Strength Development of PC Mortars
Geiker, Mette Rica; Gallucci, Emmanuel (Journal article; Peer reviewed, 2019)The impact of substitution of cement paste with uncalcined clay (bentonite and kaolinite) in the range of 5% by volume of paste on the development of hydration and properties of mortar was investigated. Two issues were ... -
Comparing chloride ingress from seawater and NaCl solution in Portland cement mortar
De Weerdt, Klaartje; Lothenbach, Barbara; Geiker, Mette Rica (Journal article; Peer reviewed, 2019)This study investigates whether chloride ingress testing can be done using NaCl solution instead of seawater when assessing the performance of concrete in marine conditions. Seawater contains besides sodium and chlorine ... -
Concluding destructive investigation of a nine-year-old marine-exposed cracked concrete panel
Geiker, Mette Rica; Robuschi, Samanta; Lundgren, Karin; Paraskevoulakos, Charilaos; Gundlach, Carsten; Danner, Tobias Alexander; Hjorth Jakobsen, Ulla; Michel, Alexander (Peer reviewed; Journal article, 2023)This study undertaken on a nine-year-old cracked concrete panel further investigates the impact of cracks on the corrosion performance of conventional steel reinforcement in marine-exposed concrete to explain observed ... -
Concrete drying model
Sarwar, Muhammad Zohaib; Cantero, Daniel; Hendriks, Max; Geiker, Mette Rica (Research report, 2023) -
Consistent crack width calculation methods for reinforced concrete elements subjected to 1D and 2D stress states A mixed experimental, numerical and analytical approach
Tan, Reignard (Doctoral theses at NTNU;2019:147, Doctoral thesis, 2019)Predicting crack widths in reinforced concrete (RC) structures is important for Serviceability Limit State (SLS) design. Crack widths exceeding the requirements can impair the functionality of a structure, limit its use ... -
Correlating the development of chloride profiles and microstructural changes in marine concrete up to ten years
Fjendbo, Simon; Fjendbo, Simon; Sørensen, Henrik E.; De Weerdt, Klaartje; Jakobsen, Ulla Hjorth; Geiker, Mette Rica (Peer reviewed; Journal article, 2022)After ten years of marine exposure, chloride and calcium profiles and petrographic data were obtained from the tidal and submerged zones of six concrete panels differing in binder composition. Moisture and portlandite ... -
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.