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- Title
Grundlagen für materialeffizientes Planen und Bauen.
- Authors
Ortlepp, Regine; Gruhler, Karin; Schiller, Georg; Ortlepp, Sebastian
- Abstract
Fundamentals for efficient planning and building material: building material composition of the German non-domestic building stock The building sector consumes large quantities of resources and generates high levels of construction and demolition waste. It is predictable that changes in the political setting will affect the construction industry in the future as well. The federal policy focusses on an increased recycling of resource-relevant mass waste, which includes mineral materials in particular. The nationwide harmonization of water and soil conservation as well as waste legislation will lead to a limitation of the usage of mineral recycled material in engineering structures or backfills (down-cycling), which is the common method today. To reach a high quality recycling process in the future, the question rises, which quantities of material from existing buildings can be used for this process. The knowledge of the quantity and distribution of materials in buildings forms a basis for this systematic and economical use of recycled materials, because the reachable recycling rate depends besides structural engineering demands of building products on the availability of appropriate quantity of recycled material in relation to the general demand for building materials. This article is thematically aimed at the trade associations of the building-material manufacturers, planners and further persons responsible for announcements. It gives an insight into the existing building stock and helps to assess the future trends with regard to availability and demand for high-quality recycled building materials. Using the example of non-domestic buildings in Germany a method will be presented to quantify the material stock. The quantification process involves three steps: calculation of Germany's total floor space and disaggregation according to building types;, calculation of material composition indicators (MCI) with respect to various building types;, calculation of the total material stock and its annual changes., The main results are the floor space of each building type, MCIs for each building type as well as the material mass in total. In Germany the total material mass of non-domestic buildings is approximately 6.8 billion tons, accounting for 44 % of the entire building stock. About 38 million tons of mineral materials annually leave this building stock through demolition and retrofitting, for which ecological and economical recycling methods must be available.
- Publication
Bautechnik, 2017, Vol 94, Issue 1, p10
- ISSN
0932-8351
- Publication type
Article
- DOI
10.1002/bate.201600022