Surfactant-induced growth of a calcium hydroxide coating at the concrete surface / Eléonore Gueit in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 9, N° 3 (05/2012)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 9, N° 3 (05/2012) . - p. 337-346 Titre : Surfactant-induced growth of a calcium hydroxide coating at the concrete surface Type de document : texte imprimé Auteurs : Eléonore Gueit, Auteur ; Evelyne Darque-Ceretti, Auteur ; Patrick Tintillier, Auteur ; Matthieu Horgnies, Auteur Année de publication : 2012 Article en page(s) : p. 337-346 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Chaux Matériaux cimentaires -- Revêtements protecteurs Matériaux hautes performances Surfaces (technologie) Surfactants Index. décimale : 667.9 Revêtements et enduits Résumé : In addition to its remarkable mechanical properties, high-performance concrete (HPC) also exhibits a very smooth surface with low porosity, which makes it particularly suitable for esthetic applications. Unfortunately, the constant environmental aggressions to which the urban buildings are exposed (organic or inorganic particles, algae, micro-organisms, staining from various sources) are a threat to their structural and esthetic durability. This article proposes an innovative method to protect HPC surfaces based on Ca(OH)2 growth at the fresh concrete/formwork interface. With the adequate surfactants used as demolding agents, it is possible to grow a continuous layer of Ca(OH)2 at the concrete surface which closes the porosity, reduces the water uptake, and gives the surface super-hydrophilic properties, facilitating self-cleaning mechanisms. Note de contenu : - MATERIALS AND METHODS : Preparation of mortar samples - Scanning electron microscopy - Image analysis - Water absorption - RESULTS : Influence of the surfactants on the Ca(OH)2 crystals - Influence of the portlandite on mortar surface properties - DISCUSSION : Influence of the surfactants on Ca(OH)2 nucleation - Influence of the surfactants on Ca(OH)2 structure - Influence of the Ca(OH)2 crystals on mortar surface properties DOI : 10.1007/s11998-011-9368-4 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-011-9368-4.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=15964 [article]

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