Dokument-ID Dokumenttyp Autoren/innen Persönliche Herausgeber/innen Haupttitel Abstract Auflage Verlagsort Verlag Herausgeber (Institution) Erscheinungsjahr Titel des übergeordneten Werkes Jahrgang/Band ISBN Veranstaltung Veranstaltungsort Beginndatum der Veranstaltung Enddatum der Veranstaltung Ausgabe/Heft Erste Seite Letzte Seite URN DOI Lizenz Datum der Freischaltung OPUS4-28605 Zeitschriftenartikel Meng, Birgit; Müller, Urs; Garcia, O.; Malaga, Katarina Performance of a new anti-graffiti agent used for immovable cultural heritage objects Cultural Heritage objects are in many cases invaluable and irrecoverable, therefore their protection is a prior goal. One threat arises by intentionally defacing such objects with graffiti. One possibility to face the imminent threat is the application of a surface protection in form of anti-graffiti systems (AGS). However, the knowledge about the performance and durability of AGS on substrates used for historical buildings is still fragmented. The goal of the presented study was to investigate the performance of a newly developed agent in comparison to a selection of commercial anti-graffiti agents on different substrates, which were used for historical buildings. Four commercial anti-graffiti agents with different chemical formulations were selected and tested with the new agent on different stone and brick substrates. The results showed clearly that AGS based on dense, water vapour impermeable coatings are not suitable to porous substrates such as sandstone, brick or porous limestone due to their impair of the hygric properties and the visual appearance of a substrate. The new agent could not completely reach the cleaning efficacy of the dense coatings but exhibited a much lower impact on the properties of the substrate and was therefore better compatible to historical surfaces. Philadelphia, Pa., USA Taylor & Francis 2014 International journal of architectural heritage : conservation, analysis, and restoration 8 6 820 834 10.1080/15583058.2012.747116 2016-02-20 OPUS4-23628 Beitrag zu einem Tagungsband Fontana, Patrick; Müller, Urs; Malaga, Katarina; Lagerblad, B.; Meng, Birgit Precast concrete facade elements with low embodied energy Concrete is by far the most common building material in the world. Due to its good durability it is widely used in building envelopes. One major part of the embodied energy in concrete comes from the production of Portland cement that consumes around 3,500 MJ energy per each ton of cement. Globally 2.6 billion tons of Portland cement is produced and the consumption is increasing. Since concrete will be used as main building material also in future construction, it is reasonable to develop concrete building components with lower embodied energy.Using the example of an ultra-high performance concrete (UHPC) façade element, it is demonstrated how the embodied energy can be reduced by application of hydrothermal curing. Technical Research Institute of Sweden 2011 ENBRI Workshop - reaching the nearly zero-energy goal for buildings 978-91-86622-51-0 ENBRI Workshop - reaching the nearly zero-energy goal for buildings Boras, Sweden 04.04.2011 05.04.2011 1 8 2016-02-19