Blar i NTNU Open på forfatter "Geiker, Mette Rica"
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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 ... -
Selvreparasjon og påvirkningen av riss på armeringens tilstand i opprisset betong - Undersøkelser av bjelker eksponert i marint miljø i 25 år
Moastuen, Ragnhild; Larsen Myklebust, Solveig (Master thesis, 2018)I dette prosjektet er det studert langtidsdata for tre bjelker som har stått eksponert marint i tidevannssonen i 25 år. Bjelkene har ulike betongresepter med ulikt innhold av bindemidler, henholdsvis 4,2 % silikastøv, 3,5 ... -
SEM-EDS analysis of products formed under natural and accelerated carbonation of concrete with CEM I, CEM II/B-M and CEM II/B-V
Revert, Andres Belda; De Weerdt, Klaartje; Geiker, Mette Rica; Hjorth Jakobsen, Ulla (Chapter; Peer reviewed, 2017)Carbonation resistance of concrete is usually tested under accelerated conditions, i.e. by elevating the CO2 concentration compared to natural conditions and keeping the RH close to 60%. However, it is not clear if these ... -
Sprøytebetong testet med destruktiv og ikke-destruktiv metode
Gulland, Jon (Master thesis, 2015)Denne oppgaven omhandler schmidthammer og ultralyd brukt på sprøytebetong, i en høytrafikkert tunnel, som er under oppfølging på grunn av sulfatangrep De ikke-destruktive metodene er ikke så vanlig i bruk på sprøytebetong ... -
The square root method for chloride ingress prediction - Applicability and limitations
Fjendbo, Simon; Sørensen, Henrik E.; De Weerdt, Klaartje; Geiker, Mette Rica (Peer reviewed; Journal article, 2021)A recent observation showed a square root time dependency of the ingress depth of a fixed (reference) chloride concentration of 0.05% chloride by mass of concrete for submerged exposure in Kattegat and the Baltic Sea. The ... -
Stability of the hydrate phase assemblage in Portland composite cements containing dolomite and metakaolin after leaching, carbonation, and chloride exposure
Machner, Alisa; Zajac, Maciej; Ben Haha, Mohsen; Kjellsen, Knut Ose; Geiker, Mette Rica; De Weerdt, Klaartje (Journal article; Peer reviewed, 2018)To reduce CO2 emissions during the production of cement and to cope with increasing demands for concrete, and thereby cement, the cement industry needs to identify new supplementary cementitious materials. These new composite ... -
State-of-the-art report: Service life modelling, carbonation of concrete and corrosion in carbonated concrete.
Revert, Andres Belda; De Weerdt, Klaartje; Hornbostel, Karla; Geiker, Mette Rica (Research report, 2017) -
Sulfate resistance of calcined clay – Limestone – Portland cements
Shi, Zhenguo; Ferreiro, Sergio; Lothenbach, Barbara; Geiker, Mette Rica; Kunther, Wolfgang; Kaufmann, Josef; Herforth, Duncan; Skibsted, Jørgen (Journal article; Peer reviewed, 2019)Calcined clays emerge as a promising source of supplementary cementitious material, which can provide a significant lowering of the Portland clinker content in blended cements. This study focusses on sulfate resistance of ... -
The effect of calcium lignosulfonate on ettringite formation in cement paste
Colombo, Alessia; Geiker, Mette Rica; Justnes, Harald; Lauten, Rolf A; De Weerdt, Klaartje (Journal article; Peer reviewed, 2018)The effect of a softwood calcium lignosulfonate, LSs, on the ettringite formed in cement paste was investigated. Two Portland cements, mainly differing in surface area and C3A content, were used. The effect of LSs addition ... -
The effect of the steel-concrete interface on chlorideinduced corrosion initiation in concrete: a critical review by RILEM TC 262-SCI
Angst, Ueli M; Geiker, Mette Rica; Alonso, Maria Cruz; Polder, Rob; Isgor, Burkan; Elsener, Bernhard; Wong, Hong; Michel, Alexander; Hornbostel, Karla; Gehlen, Christoph; Francois, Raoul; Sanchez, Mercedes; Criado, Maria; Sørensen, Henrik; Hansson, Carolyn M; Pillai, Radhakrishna; Mundra, Shishir; Gulikers, Joost; Raupach, Michael; Pacheco, José F.; Sagues, Alberto (Journal article; Peer reviewed, 2019)The steel–concrete interface (SCI) is known to influence corrosion of steel in concrete. However, due to the numerous factors affecting the SCI—including steel properties, concrete properties, execution, and exposure ... -
Undersøkelser av ledende anodemaling ved katodisk beskyttelse av armert betong anvendt på bruer og prøvefelt.
Hanssen, Pål Ødegård (Master thesis, 2019)Katodisk beskyttelse brukes til å bekjempe armeringskorrosjon i betong, hovedsakelig forårsaket av kloridinntrengning. Kort fortalt stanses korrosjonen ved å gjøre armering til en enhetlig katode ved å montere en ekstern ... -
When and How Should Chloride Profiles be Calibrated for Paste Fraction?
Fjendbo, Simon; De Weerdt, Klaartje; Sørensen, Henrik E.; Geiker, Mette Rica (Peer reviewed; Journal article, 2022)Due to stochastic and systematic variations in the paste fraction, data for total chloride content are occasionally calibrated using parallelly measured calcium content as a measure of the actual paste fraction − assuming ... -
Workshop on Moisture in Concrete, Trondheim, Norway 6–7 February 2012. Measurement of moisture and relative humidity in concrete. FA 3 Technical performance. FA 3.2 Service life
De Weerdt, Klaartje; Geiker, Mette Rica (COIN Projet report;, Research report, 2016)SINTEF and NTNU organized a WORKSHOP on moisture in concrete, 6th-7th February 2012 in Trondheim. The workshop was related to and supported by the COIN Focus Areas 3.1 “Crack free concrete structures” and 3.2 “Service ... -
µ-XRF – CHARACTERISATION OF CHLORIDE INGRESS AND SELF-HEALING IN CRACKED CONCRETE
Danner, Tobias; De Weerdt, Klaartje; Geiker, Mette Rica (Chapter, 2017)In this paper we illustrate the applicability of µ-XRF for investigations of chloride ingress and self-healing in cracked concrete. A cracked and an uncracked concrete core exposed to seawater for more than 30 years were ...