TY - CONF A1 - Mundra, Shishir A1 - Hüsken, Götz A1 - Kühne, Hans-Carsten ED - Sena-Cruz, J. ED - Correia, L. ED - Azenha, M. T1 - Electrochemical realkalisation of carbonated "Dalle de Verre" windows N2 - Concrete-glass windows or commonly referred to as “Dalle de Verre” windows are prevalent in historical monuments across Europe. “Dalle de Verre” windows were made by placing cut stained glasses, of various shapes and sizes, into a steel reinforced concrete frame. In addition to the steel reinforcement, a few steel wires run across the concrete elements to hold the glass windows into place. Much of these structures have been damaged due to carbonation of the thin concrete covers and consequent corrosion of the steel reinforcement; and exhibit several cracks due to the expansive nature of corrosion products formed at the steel–concrete interface. This study focussed on understanding the efficacy of electrochemical realkalisation in reinstating the passive state of the steel reinforcement embedded in such concrete glass windows. Simulant “Dalle de Verre” windows (representative of windows at Kaiser-Wilhelm Gedächtniskirche) were produced using different cements with a water/cement ratio of 0.6 and carbonated under accelerated conditions. Post carbonation, the concrete glass windows were electrochemically realkalised using a sacrificial anode. The influence of highly alkaline conditions due to electrochemical realkalisation on the glass-concrete interface has also been investigated. This study shows that the passive state of the steel reinforcement in “Dalle de Verre” windows, particularly at the Kaiser-Wilhelm Gedächtniskirche (memorial church) in Berlin, can be reinstated using the electrochemical realkalisation method. T2 - 3rd RILEM Spring Convention and Conference (RSCC 2020) CY - Online meeting DA - 10.03.2020 KW - Electrochemical realkalisation KW - Carbonation KW - Concrete-glass windows KW - Passivation KW - Dalle-de-verre PY - 2021 SN - 978-3-030-76465-4 U6 - https://doi.org/10.1007/978-3-030-76465-4_15 SN - 2211-0844 VL - RILEM bookseries 34 SP - 163 EP - 171 PB - Springer CY - Cham AN - OPUS4-54299 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -