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

JOURNAL OF CLEANER PRODUCTION

卷:156

Article

Haefliger, Ian-Frederic¹  John, Viola¹  Passer, Alexander²  Lasvaux, Sebastien³  Hoxha, Endrit⁴  Mendes Saade, Marcella Ruschi^2,5  Habert, Guillaume¹ 

[1] Swiss Fed Inst Technol, Swiss Fed Inst Technol, Chair Sustainable Construct, Inst Construct & Infrastruct Management, Stefano Franscini Pl 5, CH-8093 Zurich, Switzerland

[2] Graz Univ Technol, Inst Technol & Testing Bldg Mat, Inffeldgasse 24, A-8010 Graz, Austria

[3] Univ Appl Sci Western Switzerland HES SO, Sch Business & Engn Vaud HEIG VD, Lab Solar Energet & Bldg Phys LESBAT, Delemont, Switzerland

[4] EPFL, Bldg 2050 Res Grp, Fribourg, Switzerland

[5] State Univ Campinas UNICAMP, Dept Civil Engn Architecture & Urbanism, Campinas, SP, Brazil

关键词: Environmental product declaration;    Uncertainty;    Module D;    System boundary;    LCA;   

DOI  :  10.1016/j.jclepro.2017.04.052

来源: Elsevier

【 摘 要 】

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. (C) 2017 Elsevier Ltd. All rights reserved.

【 授权许可】

Free