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Climate impacts from road bridges: effects of introducing concrete carbonation and biogenic carbon storage in wood
RISE - Research Institutes of Sweden, Built Environment, Building Technology. KTH Royal Institute of Technology, Sweden .ORCID iD: 0000-0003-3140-6823
KTH Royal Institute of Technology Sweden ; IVL, Stockholm, Sweden.
RISE - Research Institutes of Sweden, Built Environment, Building Technology.ORCID iD: 0000-0003-0757-1909
2018 (English)In: Structure and Infrastructure Engineering, Vol. 14, no 1, p. 56-67Article in journal (Refereed) Published
Abstract [en]

The construction sector faces the challenge of mitigating climate change with urgency. Life cycle assessment (LCA), a widely used tool to assess the climate impacts of buildings, is seldom used for bridges. Material-specific phenomena such as concrete carbonation and biogenic carbon storage are usually unaccounted for when assessing the climate impacts from infrastructure. The purpose of this article is to explore the effects these phenomena could have on climate impact assessment of road bridges and comparisons between bridge designs. For this, a case study is used of two functionally equivalent design alternatives for a small road bridge in Sweden. Dynamic LCA is used to calculate the effects of biogenic carbon storage, while the Lagerblad method and literature values are used to estimate concrete carbonation. The results show that the climate impact of the bridge is influenced by both phenomena, and that the gap between the impacts from both designs increases if the phenomena are accounted for. The outcome is influenced by the time occurrence assumed for the forest carbon uptake and the end-of-life scenario for the concrete. An equilibrium or 50/50 approach for accounting for the forest carbon uptake is proposed as a middle value compromise to handle this issue. © 2017 Informa UK Limited, trading as Taylor & Francis Group

Place, publisher, year, edition, pages
2018. Vol. 14, no 1, p. 56-67
Keyword [en]
Life cycles, wooden bridges, concrete bridges, environmental engineering, climate change, biogenic carbon storage, concrete carbonation
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-29760DOI: 10.1080/15732479.2017.1327545Scopus ID: 2-s2.0-85019192178OAI: oai:DiVA.org:ri-29760DiVA, id: diva2:1105076
Available from: 2017-06-02 Created: 2017-06-02 Last updated: 2018-03-16Bibliographically approved

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Peñaloza, DiegoPousette, Anna

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