Buildings environmental impacts' sensitivity related to LCA modelling choices of construction materials

Häfliger, Ian-Frederic (Institute of Construction and Infrastructure Management, Swiss Federal Institute of Technology (ETH Zurich), Zürich, Switzerland) ; John, Viola (Institute of Construction and Infrastructure Management, Swiss Federal Institute of Technology (ETH Zurich), Zürich, Switzerland) ; Passer, Alexander (Institute of Technology and Testing of Building Materials, Graz University of Technology, Graz, Austria) ; Lasvaux, Sébastien (School of Management and Engineering Vaud, HES-SO // University of Applied Sciences Western Switzerland) ; Hoxha, Endrit (Ecole Polytechnique Fédérale de Lausanne (EPFL), Building 2050 Research Group, Fribourg, Switzerland) ; Ruschi Mendes Saade, Marcella (Institute of Technology and Testing of Building Materials, Graz University of Technology, Graz, Austria ; Dept of Civil Engineering, Architecture and Urbanism, State University of Campinas (UNICAMP), Campinas, SP, Brazil) ; Habert, Guillaume (Institute of Construction and Infrastructure Management, Swiss Federal Institute of Technology (ETH Zurich), Zürich, Switzerland)

The assessment of the environmental performance of buildings is now commonly using a life cycle approach, based on a growing number of databases and methods in Life Cycle Assessment (LCA). Recent studies have, however, highlighted the problems related to uncertainties in the LCA results. The aim of this study is to assess the sensitivity of construction materials to the different modelling choices in order to highlight their consequences at the building scale. In particular, we focused on the different modelling options in terms of database choices, system boundary definitions and replacement scenarios of building materials during the whole service life of the buildings. The assessment of uncertainties was conducted at two levels: the material or element level and the building level. The results clearly show the importance of these modelling choices. Variations on the overall assessment of buildings are significant, but the details at the material scale show that not all materials are similarly sensitive to these choices. We identified those materials that have a large contribution to the environmental impact of the buildings and which are also sensitive to different modelling choices. This can help for a better understanding of these modelling choices and can be used in upcoming regulations or public policies.


Keywords:
Article Type:
scientifique
Faculty:
Ingénierie et Architecture
School:
HEIG-VD
Institute:
IGT - Institut de Génie Thermique
Date:
2017-07
Pagination:
12 p.
Published in:
Journal of Cleaner Production
Numeration (vol. no.):
2017, vol. 156, pp. 805-816
DOI:
ISSN:
0959-6526
Appears in Collection:



 Record created 2020-07-14, last modified 2020-07-14

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