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). (https://www.vegvesen.no/vegprosjekter/ferjefriE39)
Vitenskapelig, faglig og kunstnerisk arbeid
Et utvalg av nyere tidsskriftspublikasjoner, kunstneriske produksjoner, bok, inklusiv bokdeler og rapport-del. Se alle publikasjoner i databasen
- (2018) Long-term Influence of Concrete Surface and Crack Orientation on Self-healing and Ingress in Cracks – Field Observations. Nordic Concrete Research. vol. 58 (1/2018).
- (2018) The Influence of Production Parameters on Pozzolanic Reactivity of Calcined Clays. Nordic Concrete Research. vol. 59 (2).
- (2018) Characterisation of calcined raw clays suitable as supplementary cementitious materials. Applied Clay Science. vol. 162.
- (2018) Determining alkali leaching during accelerated ASR performance testing and in field exposed cubes using cold water extraction (CWE) and µXRF. MATEC Web of Conferences. vol. 199.
- (2016) Early hydration of C3A–gypsum pastes with Ca- and Na-lignosulfonate. Cement and Concrete Research. vol. 79.
- (2015) Phase changes during the early hydration of Portland cement with Ca-lignosulfonates. Cement and Concrete Research. vol. 69.
- (2015) Feasibility of calcined marl as an alternative pozzolanic material. RILEM Bookseries. vol. 10.
- (2015) Reactivity and microstructure of calcined marl as supplementary cementitious material. RILEM Bookseries. vol. 10.
Del av bok/rapport
- (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.
- (2017) µ-XRF – CHARACTERISATION OF CHLORIDE INGRESS AND SELF-HEALING IN CRACKED CONCRETE. NORDIC CONCRETE RESEARCH. Proceedings of the XXIII Nordic Concrete Research Symposium.
- (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.
- (2014) Impact of mixing on early hydration of cement paste with lignosulphonate. Proceedings of the XXII Nordic Concrete Research Symposium, Reykjavik, Iceland 2014.
- (2014) Early Hydration of OPC with Lignosulphonate. 34th Cement and Concrete Science Conference, Sheffield, UK, 14-17 September 2014.
- (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.
- (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.
- (2011) Calcined marl as effective pozzolan. Proceedings of the International RILEM Conference on Advances in Construction Materials Through Science and Engineering PRO 79.
- (2013) Reactivity of Calcined Clays. 2013. ISBN 978-82-471-4552-4. Doktoravhandlinger ved NTNU (218).