TY - CONF A1 - Klinge, A. A1 - Roswag-Klinge, E. A1 - Ziegert, C. A1 - Fontana, Patrick A1 - Richter, Matthias A1 - Hoppe, Johannes ED - Habert, G. ED - Schlueter, A. T1 - Naturally ventilated earth timber constructions N2 - Earth, timber, fibre boards and insulation materials based on wooden and other natural fibres offer a variety of properties beneficial for eco innovative constructions that are able to improve the energy and resource efficiency of buildings. Due to their porosity, natural building materials are vapour active and are able to buffer moisture. In combination with highly insulated and airtight but vapour permeable building envelopes, modern earth-timber constructions provide stable indoor humidity levels and can therefore be naturally ventilated while achieving highest energy efficiency standards. Experimental evidence suggests that monitored pilot buildings in Berlin do show healthy indoor air humidity levels (around 50%) in wintertime, while mechanically ventilated buildings demonstrate significantly lower values (around 25%), which have to be considered as uncomfortable and unhealthy. The application of building materials being poor in chemical emissions, particularly volatile organic compounds (VOC) and radon, improves the indoor air quality further, so that intermittent ventilation twice a day will be sufficient to provide healthy indoor air quality. The air quality in critical rooms (e.g. small bedrooms), demonstrating a smaller air volume, should be monitored if appropriate ratios of room size to occupancy level cannot be realised. Through night time ventilation in summer, vapour active earth-timber constructions provide evaporative cooling (humidity adsorption at night time and desorption during the day). As a result, indoor temperatures of earth-timber buildings range around 8 °C below the outside temperature peak, when an appropriate glazing ratio is reflected. The EU funded research project H-house is investigating various construction materials regarding water vapour adsorption as well as emission and absorption of harmful substances. Based on this investigation new wall constructions are designed to provide a healthier indoor environment. T2 - Sustainable Built Environment (SBE) Regional Conference - Expanding Boundaries: Systems Thinking for the Built Environment CY - Zurich, Switzerland DA - 15.06.2016 KW - Building materials KW - Climate control through building elements KW - Hygroscopic earthen and wooden materials KW - Natural ventilation KW - Airtight building KW - Low emissions PY - 2016 SN - 978-3-7281-3774-6 U6 - https://doi.org/10.3218/3774-6 SP - 674 EP - 681 PB - vdf Hochschulverlag und der ETH Zürich CY - Zürich AN - OPUS4-37201 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Paul, Astrid A1 - Ziegert, C. A1 - Fontana, Patrick A1 - Meyer, J. T1 - StandardBoard - Produktnorm für Lehmplatten T1 - StandardBoard - A product standard for earthen panels N2 - Die Anwendung von modernen Lehmbaustoffen hat in den letzten Jahren überdurchschnittliche Wachstumsraten erreicht. Für Bauherren und Planer ausschlaggebend ist häufig ihr extrem niedriger CO2-Äquivalentkennwert. Entsprechend wurden Lehmplatten in einem Projekt mit Pilotcharakter für den Umbau des alten Abgeordnetenhauses in Bonn zum Gebäude des Klimareferats der Vereinten Nationen verwendet. Bei der Entscheidung für die Bauweise mit Lehmplatten standen vor allem raumklimatische und schallschutztechnische, das heißt gesundheitliche Aspekte, aber auch der Wunsch nach erhöhter Nachhaltigkeit im Vordergrund. Durch das Fehlen einer Norm entstehen im Vergleich zu geregelten Bauprodukten jedoch noch deutliche Wettbewerbsnachteile für Produzenten von Lehmplatten. Planer und Anwender sehen aufgrund fehlender Prüfzertifikate nicht selten von der Anwendung dieser Lehmbaustoffe ab. Wie schon für Lehmsteine und Lehmmörtel sollen deshalb jetzt auch für Lehmplatten an der Bundesanstalt für Materialforschung und -prüfung (BAM) in dem Projekt StandardBoard Grundlagen für eine Produktnorm geschaffen werden. Darin ist als Projektpartner der Hersteller Conluto beteiligt. Zweck des in Erarbeitung befindlichen Regelwerks ist es, über die Festlegung von Qualitätsanforderungen und Prüfvorschriften die Gebrauchstauglichkeit von Lehmplatten sicherzustellen und somit einerseits Sicherheit für Planer und Anwender und andererseits Vergleichbarkeit und damit Konkurrenzfähigkeit zu konventionellen Plattenprodukten für gleiche Einbaubereiche zu erreichen. Darüber hinaus stellt sie ein Instrument dar, um die besonderen ökologischen und bauphysikalischen Eigenschaften der Lehmbaustoffe hervorzuheben. Die Erarbeitung des Regelwerks erfolgt in enger Abstimmung mit dem Dachverband Lehm e. V. (DVL). N2 - In recent years. the utilization of modern building materials made from soil has extended considerably. For building principals and designers. this decision is often determined by their extremely low carbon dioxide equivalent. A paradigm is the application of earth panels in the conversion of the former House of Representatives in Bonn to the secretariat of the United Nations Framework Convention on Climate Change. The choice of earth panels was determined not only by considerations of indoor climate and acoustic insulation issues. but particularly by an endeavour to attain a high level of sustainability. The lack of a standard causes producers of earth panels to experience considerable competitive disadvantages. With the absence of test certificates. designers as well as implementers refrain from using earth materials. The project StandardBoard has been initiated with the purpose of developing the basis for a product standard for earth panels. being realized at the BAM. where also standards for earth blocks and earth mortars have been developed. The BAM is cooperating with the project partner Conluto. a manufacturer of earth panels. The object of the standard being in development is to guarantee the usability of earth panels by stating quality requirements and testing procedures and thereby to achieve safety for designers and users as well as competitiveness with established panels. Furthermore. a standard allows to emphasize the special ecological and climatic features of earth materials. The drafting of the standard is coordinated in close relation to the German Association for Earth Construction (DVL). T2 - Lehm 2016 - 7. Internationale Fachtagung für Lehmbau - 7th International Conference on Building with Earth CY - Weimar, Germany DA - 12.11.2016 KW - Baustoffe KW - Moderne Lehmbaustoffe KW - Lehmplatte KW - Normung KW - Prüfung KW - Produktqualität KW - Building materials KW - Modern earthen building materials KW - Earth panel KW - Standardisation KW - Testing KW - Product quality PY - 2016 SP - 1 EP - 12 PB - Eigenverlag Dachverband Lehm e. V. CY - Weimar AN - OPUS4-38996 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -