Penetration of corrosion products and corrosion-induced cracking in reinforced cementitious materials: Experimental investigations and numerical simulations

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This paper describes experimental investigations on corrosion-induced deterioration in reinforced cementitious materials and the subsequent development and implementation of a novel conceptual model. Rejnforced mortar specimens of varying water-to-cement ratios were subjected to current-induced corrosion (10, 50, and 100 mu A/cm(2)). X-ray attenuation measurements and visual investigations provided both qualitative and quantitative information on the penetration of solid corrosion products into the surrounding cementitious matrix. X-ray attenuation measurements provided time- and location-dependent concentrations of corrosion products averaged through the specimen thickness. Digital image correlation (DIC) was used to measure corrosion-induced deformations including deformations between steel and cementitious matrix as well as formation and propagation of corrosion-induced cracks. Based on experimental observations, a conceptual model was developed to describe the penetration of solid corrosion products into capillary pores of the cementitious matrix. Only capillary pores within a corrosion accommodating region (CAR), i.e. in close proximity of the steel reinforcement, were considered accessible for corrosion products. The conceptual model was implemented into a FEM based cracking model and compared to experimental results provided in the literature and obtained from DIC measurements. (C) 2013 Elsevier Ltd. All rights reserved.
Original languageEnglish
JournalCement and Concrete Composites
Volume47
Pages (from-to)75-86
Number of pages12
ISSN0958-9465
DOIs
Publication statusPublished - 2014
CitationsWeb of Science® Times Cited: No match on DOI

    Research areas

  • Corrosion, Crack detection, Non-destructive testing (NDT), Reinforcement, Modelling, FEM

ID: 101681086