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Decision-based territorial Life Cycle Assessment for the Management of Cement Concrete Demolition Waste
RISE Research Institutes of Sweden, Samhällsbyggnad. University of Nantes, France. (Infrastruktur och betongbyggande, Infrastructure and Concrete Constructions)ORCID-id: 0000-0002-0906-4006
University of Nantes, France; University Gustave Eiffel, France; Ecole Centrale de Nantes, France.
University of Nantes, France; Ecole Centrale de Nantes, France.
2020 (Engelska)Ingår i: Waste Management & Research, ISSN 0734-242X, E-ISSN 1096-3669, Vol. 38, nr 12Artikel i tidskrift, Editorial material (Övrigt vetenskapligt) Published
Abstract [en]

Existing territorial life cycle assessments (LCAs) consider all activities in a given geographical area, defined as the foreground system, but cannot lead to operational decisions. In product scale LCA, the foreground system is defined as the part of the system directly controlled by an actor and is thus more adapted to compare possible scenarios within a decision perimeter. The present paper uses that concept applied to a geographical area. The developed method consists of five steps: (a) definition of the foreground material flow analysis (MFA) or LCA system corresponding to the decision perimeter; (b) territorial MFA; (c) geo-location of activities and downscaling of territorial flows to individual activities; (d) calculation of local transport distances; and (e) calculation of LCA impact indicators. The case study concerns the management of primary and secondary resources of basic quality aggregates (BQAs) in the Loire-Atlantique department (France) in 2012. Our results show that the amount of recycled cement concrete is only 7% of total consumed BQAs, although 90% of cement concrete demolition waste (CCDW) is recycled. The environmental impacts are importantly related to off-site activities. Local impacts are mainly driven by the transport of aggregates. For land planning, a concentration of fewer recycling facilities with high authorised production capacities in main cities, close to where CCDW is mainly produced, would divide transport needs in half and thus considerably reduce environmental impacts.

Ort, förlag, år, upplaga, sidor
2020. Vol. 38, nr 12
Nyckelord [en]
Urban metabolism, material flow analysis, geographical downscale, recycling
Nationell ämneskategori
Teknik och teknologier
Identifikatorer
URN: urn:nbn:se:ri:diva-50884DOI: 10.1177/0734242X20965676OAI: oai:DiVA.org:ri-50884DiVA, id: diva2:1503792
Tillgänglig från: 2020-11-25 Skapad: 2020-11-25 Senast uppdaterad: 2023-05-25Bibliografiskt granskad

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