Browsing NTNU Open by Author "Geiker, Mette Rica"
Now showing items 1-20 of 68
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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 ... -
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 ... -
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 ... -
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. -
Critical investigation of TGA sample preparation for composite cements
Machner, Alisa; Bussetti, Lucie; Geiker, Mette Rica; De Weerdt, Klaartje (Chapter, 2015)Thermogravimetric analysis (TGA) is a frequently used technique to investigate the phase assemblages of hydrated cements. However the obtained results are sensitive to the sample preparation. A commonly used technique for ... -
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 ... -
Determining the free alkali metal content in concrete – Case study of an ASR-affected dam
Plusquellec, Gilles; Geiker, Mette Rica; Lindgård, Jan; De Weerdt, Klaartje (Journal article; Peer reviewed, 2018)In concrete affected by alkali–silica reaction (ASR), aggregates react in the high pH environment and cause deleterious expansion and cracking of the concrete. Leaching of alkali metals from the concrete might therefore ... -
Dolomite calcined clay composite cement - hydration and durability
Machner, Alisa Lydia (Doctoral theses at NTNU;2018:39, Doctoral thesis, 2018)Considerable amounts of CO2 are emitted during the production of cement. One way to reduce these CO2 emissions is to replace some of the cement clinker with supplementary cementitious materials (SCMs). A cement containing ... -
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 testing of low clinker blends - chloride ingress in similar strength mortar exposed to seawater
Geiker, Mette Rica; De Weerdt, Klaartje; Ferreiro Garzón, Sergio; Jensen, Mads Mønster; Johannesson, Björn; Michel, Alexander (Chapter; Conference object; Peer reviewed, 2017)Resistance to chloride ingress of ten different binders was investigated. Most of the binders were prepared with 35% substitution of a new clinker by limestone filler, calcined clay, burnt shale and/or siliceous fly ash. ...