20.500.12556/DiRROS-16160 An LCA methodolody for assessing the environmental impacts of building components before and after refurbishment Refurbishment is one of the most important measures for reducing the environmental impacts of the construction sector in the near future. According to the life cycle assessment (LCA) methodology for buildings, the environmental impacts of refurbishment measures should be assessed within the whole life cycle of the building and reflected in separate modules. However, in practice, refurbishment is often treated as the beginning of a new building life cycle. This leads to difficulties in correctly assessing the environmental impacts for the components that are reused or recycled after the refurbishment. The division of a building’s life cycle into two separate life cycles indicates that the environmental impacts must be divided between the life cycle before and the life cycle after the refurbishment for a correct assessment of the environmental impacts and a calculation of the residual value. We propose a newly developed methodology for calculating the environmental impacts and the residual value of refurbishment measures that also involves a division between life cycles. The new methodology is a combi-nation of already exiting methodologies that are innovatively combined and consists of four sequential steps. In the first step, the input, output and reuse flows between the life cycles before and after the refurbishment are defined. In the second step, the environmental impacts are assessed using the chosen allocation approach (i.e., the cut-off, cut-off with module D, avoided-burden, 50:50 and the product environmental footprint (PEF)). In the third step, a maintenance scenario is implemented according to the selected reference-service-life (RSL) database. In the fourth step, the residual value is estimated. The methodology was tested on selected building components. A sensitivity analysis for different allocation approaches and RSL databases was performed to show how the choice of these parameters can influence the results. The differences between the selected allocation approaches emerge if materials with recycled content are used or if the materials are being recycled or reused at the end of their life cycle. The developed methodology reliably estimates the environmental impacts as well as the residual value of the life cycle before and after the refurbishment. We expect that this research will stimulate practitioners to avoid the negligence of previous environmental flows, bringing scientific consistency to future assessments of refurbishment measures. Life cycle assessment (LCA) refurbishment allocation approaches residual value reference service life (RSL) analiza življenjskega cikla prenova alokacija preostala vrednost referenčna življenjska doba true false true Elsevier Angleški jezik Slovenski jezik © 2021 The Authors. Published by Elsevier Ltd. Neznano 2023-01-30 08:21:00 2023-07-28 09:57:54 2023-07-29 03:35:22 0000-00-00 00:00:00 2021 0 0 Nasl. z nasl. zaslona; Opis vira z dne 20. 12. 2021; Št. članka: 129527; str. 1-13 Vol. 327 Dec. 2021 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 2021-10-28 624 1879-1786 10.1016/j.jclepro.2021.129527 90251523 https://www.sciencedirect.com/science/article/pii/S0959652621037069?via%3Dihub 1 a7217a87-a06e-11ed-b359-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=21526 RAZ_Potrc_Obrecht_Tajda_2021.pdf RAZ_Potrc_Obrecht_Tajda_2021.pdf 1 9E299F6895F91A60C49F3AFA56C2AF30 8a1a95acc582df0b41ff90f9fbb77b0a18f4cfe7601b68ad52d97821ea7fd232 28f9c1cc-a06f-11ed-b359-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=21527 1-s2.0-S0959652621037069-mmc1.docx 1-s2.0-S0959652621037069-mmc1.docx 1 15CF46A39A4AEEEDAA881836A3942F23 3933f0d44c868ba030500d40fc0acbfaca593a187587fe4249931785f8bdc434 a913a9d7-2d0b-11ee-8cc8-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=22763 Zavod za gradbeništvo Slovenije 0 0 0