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Numerical and Exper...
Numerical and Experimental Analysis of Self-Protection in Reinforced Concrete due to Application of Mg–Al–NO2 Layered Double Hydroxides
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- Mir, Zahid Mohammad (author)
- Helmholtz-Zentrum Geesthacht Centre for Materials and Coastal Research, Germany
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- Bastos, Alexandre Cunha (author)
- Universidade de Aveiro, Portugal
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- Gomes, Celestino (author)
- Universidade de Aveiro, Portugal
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- Mueller, Urs (author)
- RISE,Material- och ytdesign
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- Alonso, Maria Cruz (author)
- CSIC Institute of Construction Science Eduardo Torroja, Spain
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- Villar, Kristina (author)
- CSIC Institute of Construction Science Eduardo Torroja, Spain
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- Rabade, Miguel Prieto (author)
- Universidade de Aveiro, Portugal
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- Maia, Frederico (author)
- SmallMaTek LDA, Portugal
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- Rocha, Cláudia M. (author)
- SmallMaTek LDA, Portugal
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- Maincon, Philippe (author)
- SINTEF, Norway
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- Höche, Daniel (author)
- Helmholtz-Zentrum Geesthacht Centre for Materials and Coastal Research, Germany
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- Ferreira, Mario G. S. (author)
- Universidade de Aveiro, Portugal
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- Zheludkevich, Mikhail L. (author)
- Helmholtz-Zentrum Geesthacht Centre for Materials and Coastal Research, Germany; University of Kiel, Germany
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(creator_code:org_t)
- 2020-06-22
- 2020
- English.
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In: Advanced Engineering Materials. - : Wiley-VCH Verlag. - 1438-1656 .- 1527-2648.
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Abstract
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- Concrete possesses an intrinsic chloride binding capacity. Chloride ions from the environment bind with the hydrated cementitious phases in the form of bound chlorides. The contribution of chemically bound chlorides toward increasing the service life of concrete structures is vital as they help in slowing down the chloride diffusion in the concrete thereby delaying reinforcement depassivation. The authors attempt to increase the chloride binding capacity of concrete by adding a small amount of Mg–Al–NO2 layered double hydroxides (LDHs) with the objective to delay reinforcement corrosion and by this to considerably extend the service life of concrete structures situated in harsh environments. This study presents numerical and experimental analysis of the action of LDH in concrete. Formation factor is used to determine the effective chloride diffusion coefficient. In addition, the chloride binding isotherms together with Poisson–Nernst–Planck equations are used to model the chloride ingress. A comparable chloride binding is observed for concrete with and without Mg–Al–NO2, depicting only a slight chloride uptake by Mg–Al–NO2. Further investigations are conducted to understand this behavior by studying the stability and chloride entrapping capacity Mg–Al–NO2 in concrete. © 2020 The Authors.
Keyword
- concrete
- corrosion
- finite element analysis
- layered double hydroxides
- Aluminum corrosion
- Chlorine compounds
- Concrete buildings
- Concrete construction
- Electrochemical corrosion
- Nitrogen oxides
- Chloride binding capacity
- Chloride binding isotherms
- Chloride diffusion
- Chloride diffusion coefficient
- Increasing the service lives
- Numerical and experimental analysis
- Reinforcement corrosion
- Reinforced concrete
Publication and Content Type
- ref (subject category)
- art (subject category)
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Mir, Zahid Moham ...
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Bastos, Alexandr ...
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Gomes, Celestino
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Mueller, Urs
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Alonso, Maria Cr ...
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Villar, Kristina
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Rabade, Miguel P ...
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Maia, Frederico
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Rocha, Cláudia M ...
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Maincon, Philipp ...
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Höche, Daniel
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Ferreira, Mario ...
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Zheludkevich, Mi ...
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Advanced Enginee ...
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