| Titre : |
The influence of hydrophobic protection on building exterior claddings |
| Type de document : |
texte imprimé |
| Auteurs : |
Carlos Esteves, Auteur ; Hawreen Ahmed, Auteur ; Inês Flores-Colen, Auteur ; Rosario Veiga, Auteur |
| Année de publication : |
2019 |
| Article en page(s) : |
p. 1379-1388 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Angle de contact
Applications extérieures
Capillarité
Composites
Essais (technologie)
Humidité -- Absorption:Eau -- Absorption
Hydrophobie
Isolation thermique
Mortier
Oligomères
Perméabilité
Pierre
Revêtement mural
Revêtements en bâtiment
Séchage
SiliconesLes silicones, ou polysiloxanes, sont des composés inorganiques formés d'une chaine silicium-oxygène (...-Si-O-Si-O-Si-O-...) sur laquelle des groupes se fixent, sur les atomes de silicium. Certains groupes organiques peuvent être utilisés pour relier entre elles plusieurs de ces chaines (...-Si-O-...). Le type le plus courant est le poly(diméthylsiloxane) linéaire ou PDMS. Le second groupe en importance de matériaux en silicone est celui des résines de silicone, formées par des oligosiloxanes ramifiés ou en forme de cage (wiki).
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
This study presents the results of an experimental campaign with the aim of investigating the hydrophobic protection of three substrates (stone, render, and external thermal insulation composite system—ETICS) with the application of three hydrophobic products: silicon and titanium dioxides-based nanostructured dispersion (HNST); a silane/oligomeric siloxane (HSila/Silox); and a siloxane (HSilox). To determine the effectiveness of the hydrophobic treatments, specimens of the untreated and treated wall coatings were characterized with different laboratory tests. The results showed that all products introduced significant improvements in the hydric properties of the substrates, leading to lower capillary water absorption (98%), water permeability with Karsten pipes (99%), drying index (39%), and higher water repellency assessed through the contact angle (283%). The application of hydrophobic materials also had a negative effect, leading to up to a 227% increase in resistance to water vapor diffusion. Among the assessed wall coatings, the rendering mortar appears to have the best initial performance after the application of all the types of hydrophobic materials tested. In general, the hydrophobic product HSilox was proved to be the most suitable for rendering mortars, while HNST was more appropriate for stone substrates. |
| Note de contenu : |
- EXPERIMENTAL CAMPAIGN : Materials - Methodology
- RESULTS AND DISCUSSION : Capillary water absorption and water absorption by Karsten pipes - Drying test - Water vapor permeability - Contact angle - Biological colonization - Optimization |
| DOI : |
10.1007/s11998-019-00220-7 |
| En ligne : |
https://link.springer.com/content/pdf/10.1007%2Fs11998-019-00220-7.pdf |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33018 |
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 16, N° 5 (09/2019) . - p. 1379-1388
Aller sur edunet
Accueil
The influence of hydrophobic protection on building exterior claddings in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 16, N° 5 (09/2019)
