Unveiling the Degradation Mechanism of Impermeability and Pore Structure in Concrete Under Long-Term Water Exposure
Rattachement africain : cn, jp. Niveau de preuve : code pays fourni par la source.
Le résumé fourni par la source
To investigate the evolution of impermeability and pore structure in concrete under long-term service, systematic tests were conducted on submerged concrete from dam sections with over 75 years of service. Results show that the surface water permeation resistance index of concrete in the downstream section of the main dam is only 9.19 × 10−9, significantly lower than that of concrete from the upstream of the main dam (UMD), downstream of the main dam (DMD), upstream of the auxiliary dam (UAD), and upstream of the weir (UW). Moreover, its impermeability improves noticeably within the 0–100 mm depth range. Mercury intrusion porosimetry revealed that the median pore diameter, average pore diameter, pore content, and porosity in this region reach 306.7 nm, 55.4 nm, 35.64%, and 3.961 mm, respectively—all markedly higher than in other dam sections. Combined XRD and SEM/EDS analyses indicate that crystallization pressure from saline solutions in the coastal environment, together with long-term carbonation, leads to structural loosening and increased porosity in the downstream concrete of the main dam, ultimately degrading its impermeability performance.
Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.
Le contrôle bibliographique ouvert
DOI retrouvé dans Crossref DOI retrouvé ; titre concordant.
- Titre Crossref
- Unveiling the Degradation Mechanism of Impermeability and Pore Structure in Concrete Under Long-Term Water Exposure
- Date Crossref
- 26/01/2026
- Éditeur
- MDPI AG
- Type
- journal-article
Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude, et il ne compte pas comme une seconde source scientifique indépendante.
Où se fait cette recherche
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Nanjing Hydraulic Research Institute Materials & Structural Engineering Department pays non établi dans la noticeStructure de recherche
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Ministry of Water Resources of the People's Republic of China pays non établi dans la noticeOrganisme public
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University of Miyazaki Civil and Environmental Engineering pays non établi dans la noticeUniversité ou école supérieure
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Dam Safety Management Center of the Ministry of Water Resources pays non établi dans la noticeOrganisme public
Materials & Structural Engineering Department — Nanjing Hydraulic Research Institute, Ministry of Water Resources of the People's Republic of China et Civil and Environmental Engineering — University of Miyazaki, avec 1 autre affiliation.
Une affiliation ne permet pas de déduire la nationalité d’un auteur.