Modeling Chloride Penetration in Saturated Concrete

Xi, Yunping; Bažant, Zdeněk P.

doi:10.1061/(asce)0899-1561(1999)11:1(58)

Cited by 226 publications

(130 citation statements)

References 29 publications

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“…The Fick's law and NernstPlanck equations are most commonly used in the literature to model chloride penetration into concrete. Analytical solutions of these equations are often used for engineering purposes (Liu and Weyers 1998;Morga and Marano 2015;Pang and Li 2016;Srubar 2015;Xi and Bažant 1999). These models are valid under the following assumptions (Tuutti 1982): (a) concrete is saturated (permanently submerged in seawater), (b) concrete is homogeneous, (c) chloride coefficient diffusion is constant (in time and in space), and (d) surface chloride concentration is constant in time.…”

Section: Introductionmentioning

confidence: 99%

An Efficient Chloride Ingress Model for Long-Term Lifetime Assessment of Reinforced Concrete Structures Under Realistic Climate and Exposure Conditions

Nguyen

Bastidas‐Arteaga

Amiri

et al. 2017

Int J Concr Struct Mater

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Chloride penetration is among the main causes of corrosion initiation in reinforced concrete (RC) structures producing premature degradations. Weather and exposure conditions directly affect chloride ingress mechanisms and therefore the operational service life and safety of RC structures. Consequently, comprehensive chloride ingress models are useful tools to estimate corrosion initiation risks and minimize maintenance costs for RC structures placed under chloride-contaminated environments. This paper first presents a coupled thermo-hydro-chemical model for predicting chloride penetration into concrete that accounts for realistic weather conditions. This complete numerical model takes into account multiple factors affecting chloride ingress such as diffusion, convection, chloride binding, ionic interaction, and concrete aging. Since the complete model could be computationally expensive for long-term assessment, this study also proposes model simplifications in order to reduce the computational cost. Long-term chloride assessments of complete and reduced models are compared for three locations in France (Brest, Strasbourg and Nice) characterized by different weather and exposure conditions (tidal zone, de-icing salts and salt spray). The comparative study indicates that the reduced model is computationally efficient and accurate for long-term chloride ingress modeling in comparison to the complete one. Given that long-term assessment requires larger climate databases, this research also studies how climate models may affect chloride ingress assessment. The results indicate that the selection of climate models as well as the considered training periods introduce significant errors for mid-and long-term chloride ingress assessment.

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Section: Introductionmentioning

confidence: 99%

An Efficient Chloride Ingress Model for Long-Term Lifetime Assessment of Reinforced Concrete Structures Under Realistic Climate and Exposure Conditions

Nguyen

Bastidas‐Arteaga

Amiri

et al. 2017

Int J Concr Struct Mater

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show abstract

“…For example, the United States [13], where / w c is the water cement ratio of concrete component. One-dimensional diffusion model with time varying diffusion coefficient and some modified model are discussed in [14][15][16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis of Chloride Diffusion in Concrete with Time Varying Coefficient Based on the ADI Method

Bai¹

2017

MMA

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“…Chloride penetration into concrete is a critical issue in the process of corrosion of reinforcing steel bars [Xi and Bazant, 1999]. By far, the primary source of chlorides is the deicing salt used on bridge decks.…”

Section: Effect Of Surface Concentration (C S ) Variation On Service mentioning

confidence: 99%

Relating Material Properties to Exposure Conditions for Predicting Service Life in Concrete Bridge Decks in Indiana

Barde¹,

Radlińska²,

Cohen³

2009

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Modeling Chloride Penetration in Saturated Concrete

Cited by 226 publications

References 29 publications

An Efficient Chloride Ingress Model for Long-Term Lifetime Assessment of Reinforced Concrete Structures Under Realistic Climate and Exposure Conditions

An Efficient Chloride Ingress Model for Long-Term Lifetime Assessment of Reinforced Concrete Structures Under Realistic Climate and Exposure Conditions

Numerical Analysis of Chloride Diffusion in Concrete with Time Varying Coefficient Based on the ADI Method

Relating Material Properties to Exposure Conditions for Predicting Service Life in Concrete Bridge Decks in Indiana

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