TY - CONF A1 - Miccoli, Lorenzo A1 - Fontana, Patrick A1 - Kreft, O. A1 - Pietruszka, B. A1 - Lukaszewska, A. A1 - Klinge, A. ED - De Schutter, G. ED - De Belie, N. ED - Janssens, A. ED - Van Den Bossche, N. T1 - Design of UHPC-AAC light-weight composite facade elements for refurbishment N2 - The aim of this study was to develop a lightweight composite façade element for refurbishment of existing façades. It was crucial to minimize the thermal bridges and to undercut the thermal requirement of the system existing façade new element. The awareness of the environmental impact of the building sector is increasing. In this context, ultra-high performance concrete (UHPC) materials are shown to be promising alternatives with advantages such as lower embodied energy and reduced environmental impact. Predictions suggest that UHPC composite elements for building envelopes could have other benefits such as an increased service life, optimized use of building area due to thinner elements and minimized maintenance due to the absence of reinforcement or use of non-corrosive reinforcing materials such as carbon fibers. In this framework, composite elements have been developed combining an autoclaved aerated concrete insulation layer with an external UHPC supporting layer. The results show that the lightweight composite element has a good performance in term of thermal transmittance and minimization of thermal bridges. T2 - XIV DBMC - 14th International Conference on Durability of Building Materials and Components CY - Gent, Belgium DA - 29.05.2017 KW - Composite panels KW - Ultra-high performance concrete KW - Autoclaved aerated concrete KW - Hygrothermal behaviour KW - Production technology PY - 2017 SN - 978-2-35158-159-9 VL - PRO 107 SP - 1 EP - 10 PB - RILEM Publications S.A.R.L. AN - OPUS4-40498 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 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 U6 - 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 -