Bakgrunn og aktiviteter

Current Research Project:

“Relevance of crack width and decompression requirements (limits) due to durability aspects of conventional reinforcement”

A central part of the project is collection of long-term field data on the extent of corrosion in vicinity of cracks.

Corrosion propagation in cracked concrete is not yet fully understood. Contradicting conclusions were reached based on short- and long-term observations. Short-term investigations (up to a few years) indicate that corrosion rates are enhanced by cracks and mainly dependent on cover depth and concrete quality rather than on crack width. The few undertaken long-term studies indicate that small cracks have limited influence on corrosion propagation. However, we do at present not have sufficient background for such a general statement. Thus, there is a need for detailed long-term data and understanding of mechanism of corrosion propagation of steel reinforcement embedded in cracked concrete.

The project is part of the ongoing research project " Ferry-free coastal route E39" initiated by Norwegian Public Roads Administration (NPRA). (

2004-2010: Diplom Studies of Applied Mineralogy at Friedrich-Alexander University Nuremberg-Erlangen
2010-2013: PhD Student at NTNU: Reactivity of Calcined Clays
2013-2015: Postdoc at NTNU: Lignosulfonate for Future Concrete
2015-2016: Principal Engineer at Statens Vegvesen.

Vitenskapelig, faglig og kunstnerisk arbeid

Et utvalg av nyere tidsskriftspublikasjoner, kunstneriske produksjoner, bok, inklusiv bokdeler og rapport-del. Se alle publikasjoner i databasen


Del av bok/rapport

  • Danner, Tobias; Geiker, Mette Rica. (2018) On the Influence of Surface and Crack Orientation and Exposure on Ingress in Cracks. Proceedings of the 72nd RILEM Week 2018 & SLD4, The 4th International conference on service life design for infrastructures, CONMOD2018 International symposium on concrete modelling.
  • Danner, Tobias; De Weerdt, Klaartje; Geiker, Mette Rica. (2017) µ-XRF – CHARACTERISATION OF CHLORIDE INGRESS AND SELF-HEALING IN CRACKED CONCRETE. NORDIC CONCRETE RESEARCH. Proceedings of the XXIII Nordic Concrete Research Symposium.
  • Danner, Tobias; Justnes, Harald; Geiker, Mette Rica; Lauten, R.A.. (2015) Effect of Lignosulfonate Plasticizers on the Hydration of C3A. Proceedings of the 14th International Congress on the Chemistry of Cement, Beijing China, 13-16 October 2015.
  • Colombo, Alessia; Danner, Tobias; De Weerdt, Klaartje; Geiker, Mette Rica; Justnes, Harald. (2014) Impact of mixing on early hydration of cement paste with lignosulphonate. Proceedings of the XXII Nordic Concrete Research Symposium, Reykjavik, Iceland 2014.
  • Danner, Tobias; Justnes, Harald; Geiker, Mette Rica. (2014) Early Hydration of OPC with Lignosulphonate. 34th Cement and Concrete Science Conference, Sheffield, UK, 14-17 September 2014.
  • Danner, Tobias; Justnes, Harald; Geiker, Mette Rica; Colombo, Alessia. (2014) In-Situ XRD Studies of Phase Evolution During Hydration of Portland Cement Paste with Lignosulfonates. Proceedings of the XXII Nordic Concrete Research Symposium, Reykjavik, Iceland 2014.
  • Danner, Tobias; Østnor, Tone Anita; Justnes, Harald. (2013) Thermally activated marl as a pozzolan for cementitious based products. Proceedings of the Twin Covilha International Conference on Civil Engineering - Towards a better environment and The Concrete Future 26-29 May 2013 Covilha, Portugal.
  • Justnes, Harald; Østnor, Tone Anita; Danner, Tobias Alexander. (2011) Calcined marl as effective pozzolan. Proceedings of the International RILEM Conference on Advances in Construction Materials Through Science and Engineering PRO 79.


  • Danner, Tobias; Justnes, Harald; Wiik, Kjell. (2013) Reactivity of Calcined Clays. 2013. ISBN 978-82-471-4552-4. Doktoravhandlinger ved NTNU (218).