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

Abstract 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....

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Main Authors: Phu Tho Nguyen, Emilio Bastidas-Arteaga, Ouali Amiri, Charbel-Pierre El Soueidy
Format: Article
Language:English
Published: SpringerOpen 2017-05-01
Series:International Journal of Concrete Structures and Materials
Subjects:
Online Access:http://link.springer.com/article/10.1007/s40069-017-0185-8
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spelling doaj-79f23589110545eb96b57e3251a5cce02020-11-24T23:01:25ZengSpringerOpenInternational Journal of Concrete Structures and Materials1976-04852234-13152017-05-0111219921310.1007/s40069-017-0185-8An Efficient Chloride Ingress Model for Long-Term Lifetime Assessment of Reinforced Concrete Structures Under Realistic Climate and Exposure ConditionsPhu Tho Nguyen0Emilio Bastidas-Arteaga1Ouali Amiri2Charbel-Pierre El Soueidy3Institute for Research in Civil and Mechanical Engineering/Sea and Littoral Research Institute, CNRS UMR 6183/FR 3473, UBL, Université de Nantes, GeMInstitute for Research in Civil and Mechanical Engineering/Sea and Littoral Research Institute, CNRS UMR 6183/FR 3473, UBL, Université de Nantes, GeMInstitute for Research in Civil and Mechanical Engineering/Sea and Littoral Research Institute, CNRS UMR 6183/FR 3473, UBL, Université de Nantes, GeMInstitute for Research in Civil and Mechanical Engineering/Sea and Littoral Research Institute, CNRS UMR 6183/FR 3473, UBL, Université de Nantes, GeMAbstract 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.http://link.springer.com/article/10.1007/s40069-017-0185-8reinforced concretechloride ingressmoisture transportheat transfercorrosionlong-term assessment
collection DOAJ
language English
format Article
sources DOAJ
author Phu Tho Nguyen
Emilio Bastidas-Arteaga
Ouali Amiri
Charbel-Pierre El Soueidy
spellingShingle Phu Tho Nguyen
Emilio Bastidas-Arteaga
Ouali Amiri
Charbel-Pierre El Soueidy
An Efficient Chloride Ingress Model for Long-Term Lifetime Assessment of Reinforced Concrete Structures Under Realistic Climate and Exposure Conditions
International Journal of Concrete Structures and Materials
reinforced concrete
chloride ingress
moisture transport
heat transfer
corrosion
long-term assessment
author_facet Phu Tho Nguyen
Emilio Bastidas-Arteaga
Ouali Amiri
Charbel-Pierre El Soueidy
author_sort Phu Tho Nguyen
title An Efficient Chloride Ingress Model for Long-Term Lifetime Assessment of Reinforced Concrete Structures Under Realistic Climate and Exposure Conditions
title_short An Efficient Chloride Ingress Model for Long-Term Lifetime Assessment of Reinforced Concrete Structures Under Realistic Climate and Exposure Conditions
title_full An Efficient Chloride Ingress Model for Long-Term Lifetime Assessment of Reinforced Concrete Structures Under Realistic Climate and Exposure Conditions
title_fullStr An Efficient Chloride Ingress Model for Long-Term Lifetime Assessment of Reinforced Concrete Structures Under Realistic Climate and Exposure Conditions
title_full_unstemmed An Efficient Chloride Ingress Model for Long-Term Lifetime Assessment of Reinforced Concrete Structures Under Realistic Climate and Exposure Conditions
title_sort efficient chloride ingress model for long-term lifetime assessment of reinforced concrete structures under realistic climate and exposure conditions
publisher SpringerOpen
series International Journal of Concrete Structures and Materials
issn 1976-0485
2234-1315
publishDate 2017-05-01
description Abstract 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.
topic reinforced concrete
chloride ingress
moisture transport
heat transfer
corrosion
long-term assessment
url http://link.springer.com/article/10.1007/s40069-017-0185-8
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