A model for the calculation of combined chemical reactions and transport processes and its application to the corrosion of mineral-building materials Part II. Experimental verification

Schmidt‐Döhl, Frank; Rostásy, Ferdinand

doi:10.1016/s0008-8846(99)00094-0

Cited by 14 publications

(3 citation statements)

References 5 publications

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“…Infilling of capillary porosity by precipitated solids and the resulting displacement of liquid from the material has been simulated by a finite-difference approach for nonsteady-state diffusion and reaction of ions in cementitious composites [10, 37]. Other reaction-diffusion models have been applied to the corrosion of building materials subjected to sulfate attack [38], although models of this kind require knowledge of the transport properties and porosity within the material. Expansion and damage have been simulated using continuum damage mechanics at the millimeter length scale [4, 5, 9, 16, 17].…”

Section: Introductionmentioning

confidence: 99%

Microstructural origins of cement paste degradation by external sulfate attack

Pan

Garboczi

Miao

et al. 2015

Construction and Building Materials

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A microstructure model has been applied to simulate near-surface degradation of portland cement paste in contact with a sodium sulfate solution. This new model uses thermodynamic equilibrium calculations to guide both compositional and microstructure changes. It predicts localized deformation and the onset of damage by coupling the confined growth of new solids with linear thermoelastic finite element calculations of stress and strain fields. Constrained ettringite growth happens primarily at the expense of calcium monosulfoaluminate, carboaluminate and aluminum-rich hydrotalcite, if any, respectively. Expansion and damage can be mitigated chemically by increasing carbonate and magnesium concentrations or microstructurally by inducing a finer dispersion of monosulfate.

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Section: Introductionmentioning

confidence: 99%

Microstructural origins of cement paste degradation by external sulfate attack

Pan

Garboczi

Miao

et al. 2015

Construction and Building Materials

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“…Ionic transport in reinforced concrete is currently modelled with complex and nonlinear numerical methods (Marchand et al, 2003;Truc et al, 2000;Masi et al, 1997;Shin and Kim, 2002;Schmidt-Döhl and Rostasy, 1999a;Schmidt-Döhl and Rostasy, 1999b;Roelfstra et al, 2004;Tang, 1996;Meijers, 2003;Saetta et al, 1993;Maekawa and Ishida, 2000), such as the finite element method, the use of finite differences and the Fourier transformation methods (Jaun, 2003). The model parameters are seldom precisely known and are subject to large variations, resulting from measurement and modelling uncertainties.…”

Section: Introductionmentioning

confidence: 99%

Calculation of reinforced concrete corrosion initiation probabilities using the Rosenblueth method

Brühwiler

Morgenthaler

2009

IJRS

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The Rosenblueth method is used to analyze stochastic parameters in a numerical model to calculate the solution for independent variables. By replacing all or a part of the independent variables with random variables, the solution becomes itself random. The Rosenblueth method simplifies this passage, while being limited to dichotomous random variables. This avoids the complex and computer intensive Monte Carlo simulation method. A specific example is developed in this article using a nonlinear transport model to simulate the chloride ion penetration into reinforced concrete and to predict the development of corrosion in the civil structure. The making into consideration of complex physical chemical process and a reconstituted climate increase considerably the simulation time, making impossible the usual use of the Monte Carlo method. The two numerical examples show that the exposure degree affects in a dominating way the apparition of structural damage.

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“…Two models are used, each taking into account a different scale: microscopic and macroscopic models. Microscopic models consider the flow of ions and their chemical balance in the concrete, such as the models Stadium [19], Ms Diff [33], Masi [20], by Shin [31] and Schmidt-Döhl [29] [30]. Macroscopic models take into account the various thermal variation as well as hydrous and ionic movements.…”

Section: Introductionmentioning

confidence: 99%