journal article·2019-02Open access

Macrocell corrosion in carbonated Portland and Portland-fly ash concrete - Contribution and mechanism

Andres Belda Revert, Karla Hornbostel, Klaartje De Weerdt, Mette Rica Geiker

Abstract

Abstract The corrosion of reinforcement in carbonated concrete with high moisture state was measured with and without electrical connection to reinforcement in non-carbonated concrete. The impact of the fly ash content and the cathode-to-anode ratio (C/A) was studied. A model was proposed and applied to quantify the contribution of the anodic, cathodic and ohmic partial processes to the macrocell corrosion and the impact of C/A. The total current density for the high moisture state investigated was high in all cases regardless the amount of fly ash replacement. The governing partial process depended on the cathode-to-anode ratio.
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Research context

OpenAlex topics: Concrete Corrosion and Durability · Smart Materials for Construction · Concrete and Cement Materials Research

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