TY - CONF A1 - Giese, Lutz A1 - Weimann, Karin A1 - Loge, K. T1 - Wiederverwrtung von Erneuerbaren Energieanlagen - Forschungsbedarf in der Abfallbehandlung T2 - 13. Internationales Sonnenforum (DGS) T2 - 13. Internationales Sonnenforum (DGS) CY - Berlin, Germany DA - 2002-09-12 PY - 2002 AN - OPUS4-6044 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Giese, Lutz A1 - Weritz, Friederike A1 - Weimann, Karin A1 - Niederleithinger, Ernst A1 - Ulbricht, J.P. ED - Dincer, I. T1 - Bricks made of sludge from the Izmir bay - an integrative approach for the recycling of sludge - preliminary results T2 - The First International Exergy, Energy and Environment Symposium T2 - 1st International Exergy, Energy and Environment Symposium ; IEEES-1 CY - Izmir, Turkey DA - 2003-07-13 PY - 2003 SN - 975-288440-7 SP - 995 EP - 1003 CY - Izmir AN - OPUS4-2829 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Weimann, Karin A1 - Giese, Lutz A1 - Mellmann, Günter A1 - Simon, Franz-Georg T1 - Building materials from waste JF - Materials transactions N2 - In Germany, about 60 million tons of demolition waste are generated annually. Approximately 70% of the demolition waste is currently recycled. Most recycling applications, for example in roadbed substructures, can be seen as a kind of downcycling. However, there are also some high-level applications for demolition waste. For instance, crushed and sieved concrete demolition waste can be used as concrete aggregate instead of natural materials. Depending on the crushing process, about a third of the broken concrete is currently concrete sand. At present, concrete sand fraction (0-4 mm) is rarely reused as a concrete aggregate. This is due to the fact that some important characteristics of crushed concrete sand are different from those of natural sand. As a result, it does not reach the standards required for aggregates. Concrete containing such aggregate is of lower quality than concrete made of natural aggregate. This paper describes an experimental investigation on the treatment of concrete sand gained from demolition waste by wet processing using a jig whereby the sand is separated by grain size and, more importantly, by density. Concrete produced with concrete sand which has been treated in this manner should have the same quality as concrete prepared with natural aggregate. Recycled sand used as aggregate substitutes natural resources and avoids disposal of waste. It has all the characteristics of an Ecomaterial. (author abst.) KW - Demolition waste KW - Jig KW - Wet treatment KW - Ecomaterial KW - Recycled aggregates KW - Material properties PY - 2003 DO - https://doi.org/10.2320/matertrans.44.1255 SN - 1345-9678 SN - 1347-5320 VL - 44 IS - 7 SP - 1255 EP - 1258 PB - Japan Institute of Metals CY - Sendai AN - OPUS4-2803 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -