Supporting structure resource efficiency
A wide range of materials such as timber, reinforced concrete and steel are available for creating a load-bearing structure for a building. Although not every material is suitable for all construction tasks, it is possible to choose between them in the case of many applications. It is therefore of interest to know which resource requirement is connected with which material for bringing about resource efficiency in the construction industry. In order to illustrate this in a simple case, a 3-metre high column which can be constructed using the standard supporting structure materials of timber, reinforced concrete and steel is presented below. The column was loaded with some 10 t in addition to its deadweight.
The construction material database Ökobau.dat 2011, in which almost all available construction materials are listed, was referred to for material ecological assessment purposes. The values saved there for energy requirements and CO2 emission during manufacture and disposal were used for assessment of resource efficiency. The raw material type, which is not available in Ökobau.dat, was used as a further resource efficiency criteria so that four criteria can be investigated in detail:
- Raw material type
- Energy requirement (manufacture)
- CO2 emission (Herstellung)
- Disposal (end of life)
The analysis results for the resource efficiency criteria can be summarised in the following diagram for the three materials.