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Chemo-mechanical model describing the expansion due to internal sulfate attack: numerical simulation



Title: Chemo-mechanical model describing the expansion due to internal sulfate attack: numerical simulation
Author(s): N. Baghdadi, J.F. Seignol, F. Toutlemonde
Paper category : conference
Book title: International RILEM Symposium on Concrete Modelling - ConMod '08
Editor(s): E. Schlangen and G. De Schutter
Print-ISBN: 978-2-35158-060-8
e-ISBN: 978-2-35158-076-9
Publisher: RILEM Publications SARL
Publication year: 2008
Pages: 291 - 298
Total Pages: 8
Nb references: 15
Language: English


Abstract: A phenomenological model has been formulated from a macroscopic level of observation, to predict the swelling evolution of concrete structures affected by internal sulfate attack (ISA). The proposed modelling is based on thermodynamic theory describing the delayed formation of ettringite crystals in a porous media. It takes into account the early age temperature history in concrete, environmental conditions (temperature, moisture) and stress influence on ISA expansion.
This model has been implemented into the finite element code CESAR-LCPC. It was applied to modelling the pier cap of the Foziere viaduct. In this paper, we present the different steps of numerical calculation done to predict the evolution of ISA. We discuss the role of thermal history at early age, humidity and effect of mechanical loading on swelling. The result of the numerical simulation is presented and compared to data measured in situ.


Online publication: 2009-06-15
Publication type : full_text
Public price (Euros): 0.00