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Author(s):	Gebhart, Achim; Schrenk, Johannes
Title:	Wandsysteme aus Leichtbeton-Mauerwerk und mineralischem Putz
Abstract:	Die Energieeinsparverordnung (EnEV) 2009 beinhaltet verschärfte Anforderungen an den Jahresprimärenergiebedarf und den Transmissionswärmeverlust von Gebäuden. Damit sinkt der durchschnittliche U-Wert von Außenwänden auf 0,28 W/(m2K). Mauersteine aus haufwerksporigem Leichtbeton wurden in den letzten Jahren wärmetechnisch so verbessert, dass sich diese Anforderungen mit Mauerwerksdicken von 36,5 cm problemlos erfüllen lassen. In der Regel werden Außen- und Innenwände aber verputzt. Mauerwerk, Außen- und Innenputz stellen ein System dar, das vielen bauphysikalischen Gesichtspunkten genügen muss. Mineralische Außenputze mit hydrophilen Eigenschaften und kalkgebundene Innenputze ergänzen Mauerwerk aus Leichtbetonsteinen hier ideal. Properties of wall systems made of lightweight concrete masonry and mineral plaster. The Decree for Saving Energy (Energieeinsparverordnung, EnEV 2009) consists stronger regulations for the yearly demand of energy and the loss of transmission heat of buildings. Therefore the average U-Value for enclosure walls decreases to 0.28 W/(m2K). Blocks made of aggregate lightweight concrete have been improved by the industry concerning their thermal conductivity in the last years, so these demands can be fulfilled with masonry 36,5 cm in thickness. Normally exterior and interior walls get a special plaster. Masonry, exterior and interior plaster form a system, which has to fulfill many physical aspects according to the building. Minerally exterior plasters with hydrophilic properties and interior plasters based on lime complete masonry made of lightweight concrete blocks in a perfect way.
Source:	Mauerwerk 15 (2011), No. 3
Page/s:	169-175
Language of Publication:	German

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