Diffusion potentials in saturated hardened cement paste upon chloride exposure.
Chloride
Concrete
Diffusion potential
Hardened cement paste
Permselective behavior
pH
Journal
Materials and structures
ISSN: 1359-5997
Titre abrégé: Mater Struct
Pays: Netherlands
ID NLM: 101691470
Informations de publication
Date de publication:
2023
2023
Historique:
received:
14
08
2022
accepted:
30
04
2023
medline:
30
5
2023
pubmed:
30
5
2023
entrez:
30
5
2023
Statut:
ppublish
Résumé
The diffusion potentials can cause significant errors in corrosion-related investigations of reinforced concrete structures (half-cell potential mapping, potentiometric sensors). Therefore, an improved understanding of the diffusion potentials in cement-based materials is needed. This study investigates the permselective behavior and its implication for the arising diffusion potentials. A diffusion cell is used to study the diffusion potentials in hardened cement pastes with imposed NaCl gradients. The cement pastes consist of ordinary Portland cement (OPC) and blast furnace cement (BFC) with water-cement ratios of 0.30-0.70. Laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) is used to determine the concentration profiles of Cl, Na, K and Ca in the cement pastes with a high spatial resolution (100 µm). For the BFC pastes, considerable differences in the Cl
Identifiants
pubmed: 37252036
doi: 10.1617/s11527-023-02184-y
pii: 2184
pmc: PMC10212875
doi:
Types de publication
Journal Article
Langues
eng
Pagination
100Informations de copyright
© The Author(s) 2023.
Déclaration de conflit d'intérêts
Conflict of interestsThe authors have no competing interests to declare that are relevant for the content of this article.
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