Multi-physics corrosion modeling for sustainability assessment of steel reinforced high performance fiber reinforced cementitious composites

M. Lepech, Alexander Michel, Mette Geiker

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Abstract

Using a newly developed multi-physics transport, corrosion, and cracking model, which models these phenomena as a coupled physiochemical processes, the role of HPFRCC crack control and formation in regulating steel reinforcement corrosion is investigated. This model describes transport of water and chemical species, the electric potential distribution in the HPFRCC, the electrochemical propagation of steel corrosion, and the role of microcracks in the HPFRCC material. Numerical results show that the reduction in anode and cathode size on the reinforcing steel surface, due to multiple crack formation and widespread depassivation, are the mechanism behind experimental results of HPFRCC steel corrosion studies found in the literature. Such results provide an indication of the fundamental mechanisms by which steel reinforced HPFRCC materials may be more durable than traditional reinforced concrete and other tension-softening cementitious composites. Finally, these results are extended to provide greater insight into the assessment and design of more sustainable steel reinforced HPFRCC structures.
Original languageEnglish
Title of host publicationProceedings of the 9th International Conference on Fracture Mechanics of Concrete and Concrete Structures
Number of pages12
Publication date2016
Publication statusPublished - 2016
Event9th International Conference on Fracture Mechanics of Concrete and Concrete Structures - University of California, Berkeley, Berkeley, CA, United States
Duration: 29 May 20161 Jun 2016
Conference number: 9

Conference

Conference9th International Conference on Fracture Mechanics of Concrete and Concrete Structures
Number9
LocationUniversity of California, Berkeley
CountryUnited States
CityBerkeley, CA
Period29/05/201601/06/2016

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