Influence of Cracks on Chloride Penetration in Mortar Specimens Subjected to Cyclic Treatment

Abstract:

Chloride-induced steel corrosion is worldwide one of the major causes of deterioration of reinforced concrete structures, producing loss of structural strength and stability. One of the most aggressive exposure conditions for concrete is marine environment together with the drying and wetting conditions by tidal and splash action. In such an aggressive environment the presence of cracks has a great influence on chloride ingress.In this paper both the experimental and the numerical results of the influence of artificial cracks on chloride penetration in mortar specimens are presented. The experimental results were obtained using chloride penetration tests on mortar specimens of different sizes, with and without artificial cracks, subjected to a cyclic treatment. Numerical results were obtained using transient finite element analysis by simulating chloride mass diffusionwith COSMOS/FFE realized with the heat transfer modulus T, which was replaced by the total concentration C, and the thermal conductivity K_x, replaced by diffusion coefficient D. Comparisons between the results on chloride penetration concluded that the numerical ones obtained using the mass transfer modulus agree fairly well with the experimental ones. In addition the influence of crack length on chloride ingress was presented.

• Periodical: Key Engineering Materials (Volume 601)
• Pages: 223-226
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.601.223
• Online since: March 2014
• Authors: Corina Sosdean, Liviu Marsavina, Geert de Schutter
• Keywords: Chloride Penetration, Cyclic Treatment, Experimental Results, Numerical Simulation

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