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 T2 - Expanding boundaries: Systems thinking for the built environment - Sustainable Built Environment (SBE) 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 DO - 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 - Klinge, A. A1 - Roswag, E. A1 - Fontana, Patrick A1 - Richter, Matthias A1 - Hoppe, Johannes A1 - Sjöström, C. T1 - Hygroscopic natural materials versus mechanical ventilation T2 - PROCEEDINGS terra LYON 2016 XIIth World Congress on Earthen Architecture N2 - Multi residential buildings, developed as highly energy-efficient and airtight are nowadays often fitted with mechanical Ventilation Systems as a way to overcome shortcomings and even defects tinked to indoor climate. The presented study investigates the potential of low-emitting. natural building materials with hygroscopic properties to contribute to a healthy and comfortable indoor environment, while reducing the need for mechanical Ventilation. A selection of natural building materials suitable for application as internal partition walls has been investigated with regards to their water vapour adsorption capacity. Special emphasis was placed on the investigation of modified earth plasters as well as wood-based materials, used as wall lining to provide increased adsorption capacities. In addition, tests on materials emissions (formaldehyde, VOCs, SVOCs and radon) as well as adsorption tests of airborne pollutants have been conducted in specially-designed fest chambers. All tests were performed at either the material or the component tevel. Overall results to date suggest that natural materials contribute to an improved indoor environment quality through an increased moisture-buffering capacity, low emissions and the potential to adsorb airborne pollutants, therefore reducing the need for mechanical Ventilation. T2 - Terra Lyon 2016 - XIIth World Congress on Earthen Architecture CY - Lyon, France DA - 11.07.2016 KW - Hygroscopic earth and wooden materials KW - Low emissions PY - 2016 SN - 979-10-96446-11-7 SP - 218 EP - 221 PB - Editions CRAterre CY - Villefontaine AN - OPUS4-44856 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - von Werder, Julia A1 - Bilgin, S. A1 - Hoppe, Johannes A1 - Fontana, P. A1 - Meng, Birgit ED - Middendorf, B. ED - Fehling, E. ED - Wetzel, A. T1 - Composite UHPC facade elements with self-cleaning surface: Aspects of technological manufacturing T2 - Schriftenreihe Baustoffe und Massivbau - Proceedings of HiPerMat 2020 5th International Symposium on Ultra-High Performance Concrete and High Performance Construction Materials N2 - In the framework of the European collaborative project H-House, which was finished in 2017, large façade elements were developed consisting of a box shaped external shell of ultra-high-performance concrete (UHPC) with a functionalized surface and an insulation of autoclaved aerated concrete (AAC). The exposed concrete of the elements was further refined by adding self-cleaning properties to the surface through imprinting a microstructure in combination with chemical agents directly in the casting process. The paper focuses on selected technological aspects of the manufacturing process of large-scale prototypes. Presented are results of the upscaling process of functionalized surfaces from small specimen up to large UHPC composite facade elements produced for the construction of a demonstrator. T2 - 5th International Symposium on Ultra-High Performance Concrete and High Performance Construction Materials (HiPerMat 2020) CY - Kassel, Germany DA - 11.03.2020 KW - Ultra-High Performance Concrete KW - Facade Elements KW - Self-Cleaning Properties KW - Architectural Concrete PY - 2020 SN - 978-3-7376-0828-2 DO - https://doi.org/10.17170/kobra-202002271026 IS - 32 SP - 51 EP - 52 PB - kassel university press CY - Kassel AN - OPUS4-51908 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - von Werder, Julia A1 - Fontana, P. A1 - Hoppe, Johannes A1 - Bilgin, S. A1 - Meng, Birgit ED - Serrat, C. ED - Casas, J. R. ED - Gibert, V. T1 - Composite Facade Elements with Self-Cleaning Surface made of Ultra-High-Performance Concrete (UHPC) T2 - Current Topics and Trends on Durability of Building Materials and Components - Proceedings of the XV edition of the International Conference on Durability of Building Materials and Components (DBMC 2020) N2 - In the framework of the European project H-House various concrete façade elements were developed with the aim to ensure a long service life by combining a very durable material with self-cleaning properties. The façade elements presented are made of a shell of UHPC filled with blocks of aerated autoclaved concrete as insulating material. Self-cleaning properties were realized amongst others by imprinting a microstructure into the surface during casting. The paper focuses on selected technological aspects of the manufacturing process of prototypes which had to be performed in two concreting sections. Furthermore the challenges faced when upscaling the self-cleaning properties are addressed and the strategy to assess the self-cleaning properties by measuring the contact and the roll-off angel is presented. The results show that a successfull upscalaing process requires detailed planning and that the best results can often be achieved with a moderate work effort or material use. T2 - XV International Conference on Durability of Building Materials and Components (DBMC 2020) CY - Online meeting DA - 20.10.2020 KW - Ultra-High-Performance Concrete KW - Facade Elements KW - Self-Cleaning Properties KW - Adhesive Pull-Strength KW - Microstructure KW - Architectural Concrete PY - 2020 SN - 978-84-121101-8-0 SP - 1289 EP - 1297 PB - International Center for Numerical Methods in Engineering (CIMNE) CY - Spain AN - OPUS4-51967 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Fontana, Patrick A1 - Qvaeschning, D. A1 - Hoppe, Johannes ED - de Schutter, G. ED - de Belie, N. ED - Janssens, A. ED - van den Bossche, N. T1 - Durability of UHPC for facade elements with self-cleaning surfaces T2 - Proceedings of XIV DBMC - 14th International Conference on Durability of Building Materials and Components N2 - This paper presents the development of ultra-high performance concrete (UHPC) for façade elements with self-cleaning properties. For creating self-cleaning surfaces two different approaches are proposed. One approach is based on the photocatalytic activation of the external UHPC shell by incorporation of TiO2 particles. The second approach consists of the modification of the UHPC surface by micro structuring in combination with the application of hydrophobic agents to create durable super hydrophobicity. In the framework of the H-HOUSE Project funded by the European Commission the experimental investigations were performed with UHPC based on Dyckerhoff Nanodur® technology. The special properties of this material enable the precise reproduction of any micro structure without flaws. The current results obtained from laboratory and outdoor weathering tests are promising and demonstrate the feasibility of the approaches. T2 - XIV DBMC - 14th International Conference on Durability of Building Materials and Components CY - Ghent, Belgium DA - 29.05.2017 KW - Building materials KW - Ultra-high performance concrete KW - Water repellence KW - Photocatalysis KW - Waethering KW - Durability PY - 2017 SN - 978-2-35158-159-9 VL - PRO 107 SP - 209 EP - 210 PB - RILEM Publications S.A.R.L. AN - OPUS4-40997 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Miccoli, L. A1 - Fontana, P. A1 - Qvaesching, D. A1 - Kreft, O. A1 - Hoppe, Johannes A1 - Meng, Birgit T1 - UHPC-AAC facade elements: Structural design, production technology and mechanical behavior T2 - ICAAC 6th International Conference on Autoclaved Aerated Concrete N2 - The aim of this study was to develop a lightweight composite facade element for new buildings and for the refurbishment of existing facades. These composite elements have been developed combining an insulation layer of autoclaved aerated concrete (AAC) with an external ultrahighperformance concrete (UHPC) supporting layer. This solution allows avoiding the use of connectors and facilitates the production procedure. The structural behavior of the facade elements is mainly influenced by the presence of the upturning edges that are able to increase the stiffness of the element and reduce the thickness of the external layer. The insulation material has no influence on the structural behavior of the UHPC boxes. Flexural tests were carried out to investigate a potential detachment of the external layer from the upturning edge. The photogrammetric Analysis used during the flexural tests essentially confirmed that the bond between the two UHPC layers cast in two steps is reliable. The quality of the bond between the external layer and the upturning edge is a key parameter to define the bearing capacity of the element. T2 - ICAAC 6th International Conference on Autoclaved Aerated Concrete CY - Potsdam, Germany DA - 04.09.2018 KW - Autoclaved aerated concrete KW - Flexural testing KW - Photogrammetric analysis KW - Production technology KW - Ultrahigh-performance concrete PY - 2018 SN - 978-3-433-03276-3 DO - https://doi.org/10.1002/cepa.854 VL - 2 IS - 4 SP - 483 EP - 488 PB - Wilhelm Ernst & Sohn - Verlag für Architektur und technische Wissenschaften GmbH & Co. KG CY - Berlin, Germany AN - OPUS4-47588 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CHAP A1 - Klinge, A. A1 - Roswag-Klinge, E. A1 - Richter, Matthias A1 - Fontana, P. A1 - Hoppe, Johannes A1 - Payet, J. ED - Venkatarama Reddy, B. V. ED - Mani, M. ED - Walker, P. T1 - The Relevance of Earthen Plasters for Eco Innovative, Cost-Efficient and Healthy Construction—Results from the EU-Funded Research Project [H]house T2 - Earthen Dwellings and Structures - Current Status in their Adoption N2 - The European building sector is moving towards more complex and high-tech building approaches. While focusing on energy efficiency, aspects e.g. occupant health, sustainability and life cycle costing are often neglected. This study highlights the potential of earthen plasters in combination with natural ventilation for low-tech solutions. The EU funded project [H]house established the outstanding performance of earthen materials in light of hygrothermal and air purifying properties, which were further supported by experimental data from monitoring of naturally ventilated pilot buildings in Berlin. Additionally, [H]house demonstrated through LCC an increased cost efficiency of earth based low-tech solutions in comparison to conventional constructions relying on mechanical ventilation. KW - Climate responsive materials KW - Low-tech approach KW - IEQ KW - natural ventilation KW - LCC PY - 2019 SN - 978-981-13-5882-1 SN - 978-981-13-5883-8 DO - https://doi.org/10.1007/978-981-13-5883-8_32 SN - 2363-7633 SN - 2363-7641 SP - 371 EP - 382 PB - Springer Nature Singapore Pte Ltd. CY - Singapur AN - OPUS4-47792 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -