Blar i NTNU Open på forfatter "Geiker, Mette Rica"
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Durability-related crack width and concrete cover requirements and recommendations from reinforced concrete design codes
Pease, Bradley Justin; Geiker, Mette Rica (Research report, 2018)This report provides an overview of several international code requirements and recommendations from technical committees concerning impact of cracks on durability of reinforced concrete. Most requirements and recommendations ... -
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 ... -
Electro active repair of concrete demonstration of applicability
Polder, Rob; Geiker, Mette Rica (Chapter, 2017)Conventional concrete patch repairs have poor durability: 50% fail within ten years. A major cause is insufficient removal of contaminated concrete and insufficient steel cleaning. Chlorides left behind reactivate the ... -
Experimental and theoretical investigation of crack width calculation methods for RC ties
Tan, Jesus Reignard Medel; Eileraas, Kristoffer; Opkvitne, Ola; Zirgulis, Giedrius; Hendriks, Max; Geiker, Mette Rica; Brekke, Dan-Evert; Kanstad, Terje (Journal article; Peer reviewed, 2018)This paper theoretically and experimentally investigates the semi-empirical formulas recommended by Eurocode 2 (EC2), fib Model Code 2010 (MC2010), and Eurocode 2 with the German National Annex (DIN) for calculating crack ... -
Friedel's salt profiles from thermogravimetric analysis and thermodynamic modelling of Portland cement-based mortars exposed to sodium chloride solution
Shi, Zhenguo; Geiker, Mette Rica; Lothenbach, Barbara; De Weerdt, Klaartje; Garzón, Sergio Ferreiro; Enemark-Rasmussen, Kasper; Skibsted, Jørgen (Journal article; Peer reviewed, 2017)Thermogravimetric analysis (TGA), powder X-ray diffraction (XRD) and thermodynamic modelling have been used to obtain Friedel's salt profiles for saturated mortar cylinders exposed to a 2.8 M NaCl solution. Comparison of ... -
Frost Salt Scaling of Concrete
Wahlbom, David; Fridh, Katja; Feng-Chong, Teddy; Dangla, Patrick; Geiker, Mette Rica; Jacobsen, Stefan; Skocek, Jan; Huy Vu, Quoc (Conference object; Journal article; Peer reviewed, 2017)The project will address the mechanism(s) of deterioration in frost salt scaling (FSS) including the potentially protective effect of entrained air voids and the performance of low-clinker blends. Frost deterioration of ... -
Impact of Accelerated Carbonation on Microstructure and Phase Assemblage
Belda Revert, Andres; De Weerdt, Klaartje; Hjorth Jakobsen, Ulla; Geiker, Mette Rica (Journal article; Peer reviewed, 2018)The paper summarizes preliminary results on characterization of the microstructure and phase assemblage of mortar and concrete samples containing Portland and Portland -fly ash cement carbonated at ... -
Impact of production parameters on physiochemical characteristics of wood ash for possible utilisation in cement-based materials
Sigvardsen, Nina Marie; Kirkelund, Gunvor M.; Jensen, Pernille E.; Geiker, Mette Rica; Ottosen, Lisbeth M. (Journal article; Peer reviewed, 2019)Energy production is reorganised to mitigate the pressure on the global environment. This reorganisation leads to an increase in the production of wood ash (WA). Multivariate modelling was used to identify the link between ... -
Impact of sample crushing on porosity characterization of hardened cement pastes by low temperature calorimetry: Comparison of powder and cylinder samples
Wu, Min; Fridh, Katja; Johannesson, Björn; Geiker, Mette Rica (Journal article; Peer reviewed, 2018)Impact of sample crushing on porosity characterization of hardened cement pastes by low temperature calorimetry: Comparison of powder and cylinder samples -
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, ... -
Influence of Cracks on Chloride Ingress and Reinforcement Corrosion
Rygg, Andreas (Master thesis, 2017)Chloride induced reinforcement corrosion is a major durability problem in concrete constructions. It is consensus in literature that cracks facilitate chloride ingress, and may initiate early reinforcement corrosion. This ... -
Influence of Cracks on Chloride Ingress and Reinforcement Corrosion
Rygg, Andreas (Master thesis, 2017)Chloride induced reinforcement corrosion is a major durability problem in concrete constructions. It is consensus in literature that cracks facilitate chloride ingress, and may initiate early reinforcement corrosion. This ... -
Investigation of the products of the dolomite reaction in Portland cement pastes
Machner, Alisa; Zajac, Maciej; Ben Haha, Mohsen; Kjellsen, Knut Ose; Geiker, Mette Rica; De Weerdt, Klaartje (Chapter; Conference object; Peer reviewed, 2017)The formation of potentially deleterious reaction products from the reaction of dolomite fines in Portland cement pastes was investigated. It was shown that the reaction of dolomite fines did not follow the commonly accepted ... -
Limit states for sustainable reinforced concrete structures
Geiker, Mette Rica; Michel, Alexander; Stang, Henrik; Lepech, Michael (Journal article; Peer reviewed, 2019)Probability-based limit state design is a hallmark of modern civil engineering practice. Code requirements to meet both ultimate limit states (ULS) and serviceability limit states (SLS) have vastly improved the safety and ... -
Limitations of the hydrotalcite formation in Portland composite 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)This study focuses on the reaction of dolomite powder in combination with metakaolin in Portland composite cement pastes. We studied paste samples cured at 20 °C, 38 °C, and 60 °C for up to 1 year. In these systems, the ... -
Long-term Influence of Concrete Surface and Crack Orientation on Self-healing and Ingress in Cracks – Field Observations
Danner, Tobias; Geiker, Mette Rica (Journal article; Peer reviewed, 2018)This paper presents results from investigations on the long-term influence of concrete surface and crack orientation on ingress in cracks. Five reinforced concrete structures from Norway exposed to either de-icing salts ... -
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 ... -
Mineralogical Sequence of Self-Healing Products in Cracked Marine Concrete
Danner, Tobias; Jakobsen, Ulla Hjorth; Geiker, Mette Rica (Journal article; Peer reviewed, 2019)Self-healing of cracked concrete beams after 25 years of marine exposure was investigated. The extent of self-healing and the chemical and mineralogical composition of the self-healing products were characterized, and ... -
Modified cracked membrane model for consistent crack width predictions of reinforced concrete structures subjected to in-plane loading
Tan, Jesus Reignard Medel; Hendriks, Max; Geiker, Mette Rica; Kanstad, Terje (Journal article; Peer reviewed, 2019)The modified cracked membrane model (MCMM) presented in this paper was formulated to facilitate a mechanical calculation model that predicts crack widths in reinforced concrete (RC) structures subjected to in-plane loading ... -
Nanorubber-modified cement system for oil and gas well cementing application
Jafariesfad, Narjes; Khalifeh, Mahmoud; Skalle, Pål; Geiker, Mette Rica (Journal article, 2017)Flexible cement systems with low shrinkage are more capable than the conventional cement systems to withstand the tensile stresses generated by fluctuation of temperature and pressure in oil and gas wells. In this work ...