Browsing SINTEF Open by Author "Danner, Tobias"
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Calcareous smectite clay as a pozzolanic alternative to kaolin
Danner, Tobias; Norden, Geir; Justnes, Harald (Journal article; Peer reviewed, 2019)The hydration of cement pastes with addition of a kaolinite rich clay (Clay A) and a calcareous smectite rich clay (Clay B) was investigated with isothermal calorimetry, in-situ XRD, PXRD, TGA and EPMA. Portland cement was ... -
Characterisation of calcined raw clays suitable as supplementary cementitious materials
Danner, Tobias; Norden, Geir; Justnes, Harald (Journal article; Peer reviewed, 2018)The potential use of two raw clays (Clay A: kaolin; Clay B: calcareous montmorillonite) as supplementary cementitious material (SCM) in blended cements was investigated. Cement replacement in mortars by 20% calcined Clay ... -
Characterisation of calcined raw clays suitable as supplementary cementitious materials
Danner, Tobias; Norden, Geir; Justnes, Harald (Journal article; Peer reviewed, 2018)The potential use of two raw clays (Clay A: kaolin; Clay B: calcareous montmorillonite) as supplementary cementitious material (SCM) in blended cements was investigated. Cement replacement in mortars by 20% calcined Clay ... -
Determining alkali leaching during accelerated ASR performance testing and in field exposed cubes using cold water extraction (CWE) and μXRF
Lindgård, Jan; Østnor, Tone Anita; Fournier, Benoit; Lindgård, Øyvind; Danner, Tobias; Plusquellec, Gilles; De Weerdt, Klaartje (Journal article; Peer reviewed, 2018)Considerable leaching of alkali metals was documented, both in concrete samples exposed to accelerated laboratory testing and field samples. CWE allowed to quantitatively determine the free alkali metal profiles as a ... -
Durability aspects of cracks in concrete: field observations
Geiker, Mette Rica; Danner, Tobias; Hornbostel, Karla; Michel, Alexander (Nordic Concrete Research;17, 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”. ... -
Field Station Sandnessjøen, Effect of cracks in concrete after 25 years - Data report
Danner, Tobias; Belda Revert, Andres; Geiker, Mette Rica (;374, Research report, 2020)Tre opprissede betongbjelker støpt med forskjellige bindemiddelsammensetninger ble undersøkt etter 25 års marin eksponering ved feltstasjon Sandnessjøen. Betongbjelkene ble undersøkt med tanke på effekten av riss på ... -
Kloridbestandighet av 1980-tallets offshorebetong; 30 års eksponering ved DNV GLs feltstasjon i Bergen
Rodum, Eva; Danner, Tobias (Statens vegvesens rapporter;, Research report, 2019)I perioden 1983-1988 produserte Norwegian Contractors i Hinnavågen store prøveelementer (betongsøyler) med offshore-betong for utplassering ved DNV GLs marine feltstasjon i Bergen. Søylene ble produsert i henhold til ... -
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 ... -
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 (NTNU report;R-1-2019, Research report, 2019-11-22)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 ... -
The Influence of Production Parameters on Pozzolanic Reactivity of Calcined Clays
Danner, Tobias; Justnes, Harald (Journal article; Peer reviewed, 2018)Calcined clays are gaining increasing interest as future supplementary cementitious materials for the production of blended cements. Besides the mineralogy, the right production conditions can affect the pozzolanic activity ...