Influence of construction material uncertainties on residential building LCA reliability

Hoxha, Endrit (Centre Scientifique et Technique des Bâtiments (CATB), Division Environnement et Ingénierie du Cycle de la Vie, University Paris-Est, St Martin d'Hères, France ; EPFL, Fribourg, Switzerland) ; Habert, Guillaume (ETH Zurich, Zurich, Switzerland) ; Lasvaux, Sébastien (Centre Scientifique et Technique des Bâtiments (CATB), Division Environnement et Ingénierie du Cycle de la Vie, University Paris-Est, St Martin d'Hères, France ; School of Management and Engineering Vaud, HES-SO // University of Applied Sciences Western Switzerland) ; Chevalier, Jacques (Centre Scientifique et Technique des Bâtiments (CATB), Division Environnement et Ingénierie du Cycle de la Vie, University Paris-Est, St Martin d'Hères, France) ; Le Roy, Robert (Université Paris-Est, UMR NAVIER, Marne-la-Vallée, France ; GSA Laboratory, ENSAPM, Paris, France)

Life cycle assessment (LCA) is widely used to evaluate the environmental impacts of buildings, but due to uncertainties, the final results can be unreliable. To increase the reliability of LCA results, this study identifies the building materials that have the largest relative contribution to buildings' impacts and uncertainties. To do so, the impacts of 15 single-family houses and 15 multi-family building projects situated in France are evaluated. Only the uncertainties related to input parameters for building materials are considered (service life, characterization factors and quantity). The results obtained in this study show that LCA will still be able to distinguish significantly between two projects if their difference is higher than approximately 20%. Furthermore, the impacts of the buildings' exploitation phase do not show any correlations with the impacts related to the construction materials. The exploitation phase dominates the non-renewable energy consumption while waste impacts are most influenced by building materials. The contribution to global warming potential is shared between both phases. Finally, reinforced concrete was identified as the largest contributor to the environmental impact of both building types. In contrast, insulation materials and non-structural wood were the largest contributors to the uncertainties of the final results for single-family houses and multi-family buildings, respectively.


Keywords:
Article Type:
scientifique
Faculty:
Ingénierie et Architecture
School:
HEIG-VD
Institute:
IGT - Institut de Génie Thermique
Date:
2017-02
Pagination:
15 p.
Published in:
Journal of Cleaner Production
Numeration (vol. no.):
2017, vol. 144, pp. 33-47
DOI:
ISSN:
0959-6526
Appears in Collection:

Note: The status of this file is: restricted


 Record created 2020-07-14, last modified 2020-07-20

Fulltext:
Download fulltext
PDF

Rate this document:

Rate this document:
1
2
3
 
(Not yet reviewed)