TY - CONF A1 - Falchi, L. A1 - Müller, Urs A1 - Fontana, Patrick A1 - Izzo, F.C. A1 - Balliana, E. A1 - Biscontin, G. A1 - Zendri, E. T1 - Sustainability in the maintenance and protection of architectural surfaces: Innovative water-repellent pozzolana-lime mortars T2 - Scienza e beni culturali XXX. 2014 - Quale sostenibilita' per il Restauro? N2 - 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 different resistance to the weathering and to salt crystallization. T2 - Scienza e beni culturali XXX. 2014 - Quale sostenibilita' per il Restauro? CY - Brixen, Italy DA - 01.07.2014 KW - Water-repellent admixtures KW - Artificial weathering KW - Salt crystallization KW - Restoration mortars PY - 2014 SN - 978-88-95409-18-4 SN - 2039-9790 SP - 637 EP - 648 PB - Edizioni Arcadia Ricerche S.r.l. AN - OPUS4-31841 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -