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Sustainability in the maintenance and protection of architectural surfaces: Innovative water-repellent pozzolana-lime mortars

  • Water-repellent renders were studied in order to evaluate their suitability for restoration applications. Water repellent admixtures, such as powdered siloxane-based products and metal soaps (zinc and calcium stearates), were mixed with a pozzolana-lime binder similar to historical binders with hydraulic properties. The chemical-physical and structural properties, the effectiveness and the durability of the water-repellent mortars in different environmental conditions were studied. The influence of the water repellent admixtures was evaluated by FT-IR analyses, by testing the mechanical properties and the behaviour in presence of water. The durability of the water-repellent mortars was evaluated after the exposure to artificial weathering (UV-light and water) and to immersion/drying cycles in saturated sodium sulphate solution. The nature of the water-repellent admixtures influenced both the hydration reactions and the chemical-physical properties of the mortars resulting in differentWater-repellent renders were studied in order to evaluate their suitability for restoration applications. Water repellent admixtures, such as powdered siloxane-based products and metal soaps (zinc and calcium stearates), were mixed with a pozzolana-lime binder similar to historical binders with hydraulic properties. The chemical-physical and structural properties, the effectiveness and the durability of the water-repellent mortars in different environmental conditions were studied. The influence of the water repellent admixtures was evaluated by FT-IR analyses, by testing the mechanical properties and the behaviour in presence of water. The durability of the water-repellent mortars was evaluated after the exposure to artificial weathering (UV-light and water) and to immersion/drying cycles in saturated sodium sulphate solution. The nature of the water-repellent admixtures influenced both the hydration reactions and the chemical-physical properties of the mortars resulting in different resistance to the weathering and to salt crystallization.zeige mehrzeige weniger

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Metadaten
Autor*innen:L. Falchi, Urs Müller, Patrick Fontana, F.C. Izzo, E. Balliana, G. Biscontin, E. Zendri
Dokumenttyp:Beitrag zu einem Tagungsband
Veröffentlichungsform:Verlagsliteratur
Sprache:Englisch
Titel des übergeordneten Werkes (Englisch):Scienza e beni culturali XXX. 2014 - Quale sostenibilita' per il Restauro?
Jahr der Erstveröffentlichung:2014
Verlag:Edizioni Arcadia Ricerche S.r.l.
Erste Seite:637
Letzte Seite:648
Freie Schlagwörter:Artificial weathering; Restoration mortars; Salt crystallization; Water-repellent admixtures
Veranstaltung:Scienza e beni culturali XXX. 2014 - Quale sostenibilita' per il Restauro?
Veranstaltungsort:Brixen, Italy
Beginndatum der Veranstaltung:01.07.2014
Enddatum der Veranstaltung:04.07.2014
ISSN:2039-9790
ISBN:978-88-95409-18-4
Verfügbarkeit des Dokuments:Datei im Netzwerk der BAM verfügbar ("Closed Access")
Datum der Freischaltung:20.02.2016
Referierte Publikation:Ja
Datum der Eintragung als referierte Publikation:06.11.2014
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