Degradation of Concrete Structures due to External Sulfate Attack

Abstract:

In this paper, we focus on the numerical simulation of degradation of concrete structures subject to External Sulfate Attack (ESA). A diffusion-reaction model is used to describe the diffusion of sulfates inside the material and the reaction with the reactive constituents of the cement paste (calcium aluminates). The mechanical analysis is based on a new bi-phase chemo-elastic model with chemical and mechanical damage. The results obtained with the proposed approach are compared with experimental data on a reduced scale tunnel lining structure subject to ESA.

• Periodical: Key Engineering Materials (Volume 711)
• Pages: 310-318
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.711.310
• Online since: September 2016
• Authors: Nicola Cefis, Claudia Comi*
• Keywords: Concrete, Damage Mechanics, Porous Media, Sulfate Attack

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