The relation between electrokinetics and chloride transport through cement-based materials

Voinitchi, Dorinel; Julien, S.; Lorente, Sylvie

doi:10.1016/j.cemconcomp.2007.11.002

Cited by 22 publications

(14 citation statements)

References 16 publications

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“…Extending this result to the value of the di usion coe cient of an ionic species thanks to Equation (3), means that the ionic di usion coe cient will not vary when the ionic strength of the pore solution changes, thus will not vary when the pore solution concentration of the various ions in presence change. Such results are in agreement with previous works of our group (see for example [21] and [3]). …”

Section: Impact Of the Pore Solution Compositionsupporting

confidence: 83%

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Impact of the pore solution on the aqueous diffusion through porous materials

Mercado-Mendoza

Lorente

2015

Open Engineering

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This paper reviews the main advances of our group on the measurements of the di usion coe cient through partially saturated porous materials. The technique that we developed is based on the de nition of an equivalent electrical model reproducing the behavior of the porous microstructure. The electrical characteristics are measured by means of Electrochemical Impedance Spectroscopy. After validating the approach on saturated samples, the method was applied to partially saturated materials. We showed that the pore solution ionic composition has not impact on the results, and documented the e ect of the pore size distribution on the macroscopic diffusion coe cient.

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Section: Impact Of the Pore Solution Compositionsupporting

confidence: 83%

“…The di usion coe cient is a macroscopic parameter that depends on the characteristics of both the di using species and the porous material involved in the di usion process [1][2][3]. This parameter is of extreme importance in several domains.…”

Section: Introductionmentioning

confidence: 99%

Impact of the pore solution on the aqueous diffusion through porous materials

Mercado-Mendoza

Lorente

2015

Open Engineering

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“…Most studies that simulate the migration test assume that chemical reactions are negligible [7]. However, recent research shows that this assumption can overestimate the tortuosity of the material [18,19]. The objective of the present study is to show the trend of ionic behavior in the surface-coated concrete during migration tests so that the chemical reactions are not included.…”

Section: Model Descriptionmentioning

confidence: 99%

Simulation of Chloride Ingress through Surface-Coated Concrete during Migration Test Using Finite-Difference and Finite-Element Method

Yoon

2017

International Journal of Polymer Science

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Polymer surface coatings are commonly used to enhance the corrosion resistance of concrete structures in saline environments to ionic diffusivity; this diffusivity can be determined by migration tests. This paper presents the simulation of the effects of the surface coatings on migration tests by solving the Nernst-Planck/Poisson model using both finite-difference method and finite-element method. These two numerical methods were compared in terms of their accuracy and computational speed. The simulation results indicate that the shapes of ionic profiles after migration tests depend on the effectiveness of surface coatings. This is because highly effective surface coatings can cause a high ionic concentration at the interface between coating and concrete. The simulation results were also compared to homogenized cases where a homogenized diffusion coefficient is employed. The result shows that the homogenized diffusion coefficient cannot represent the diffusivity of the surface-coated concrete.

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“…These methods have been used to speed up the consolidation of soft clay [16,[19][20][21], to increase the stability of slopes [22][23][24], to increase the flow rate of reservoir fluids during petroleum recovery [25], and for drainage and sedimentation of clay suspensions [26]. Recently, Voinitchi et al [27] have shown how the use of an electrokinetic technique can have an impact on chloride transport through cement based-materials. In a recent report, the latest developments in electrokinetics were reviewed [28].…”

Section: Introductionmentioning

confidence: 99%