Abstract
The emissions of greenhouse gases caused by the construction sector represented 2015 18 % of Sweden’s total greenhouse emissions and the sector had by 2018 published a plan on how to reach a climate neutral value chain by 2045. Studies have shown that the construction phase has become a larger part of the climate impact from new-built multi-family residential buildings than before, in, in relation to the maintenance phase of buildings’ lifespan.
The Swedish Government has proposed a new law to make the constructor carry out climate calculus for construction of all new buildings. In this study the climate impact from the construction phase of a retirement home is calculated and suggestions of alternative materials and technical solutions are made to show the potential reduction of CO2e. By using Byggsektorns Miljöberäkningsverktyg, BM, the study showed a potential for climate impact reduction using solutions and material changes. By planning for the use of low-impact-materials the climate impact in the construction phase, A1-A5, can be decreased for the studied parts by 21-42 % compared to the building without alterations. The suggested alternative solutions have been focused on the building materials, the building services system are not included. The study’s results also showed concrete and construction steel as the materials contributing to most of the building materials total climate impact. As most of the building’s foundation consists of these materials, the foundation has the largest climate impact and therefore the highest reduction potential. The study suggested that the biggest part of materials’ climate impact originate from the production of the materials and through recycling and reusing construction materials the impact can be severely reduced. Different combinations have been examined and one alternative with solutions that are judged to be easy to apply, existing technical solutions of today had potential of reducing the impact with 21 %. With construction projects starting to conduct climate impact calculations, the results support that Sweden is on its way to fulfill several of the sub goals set by and for the construction sector.
The Swedish Government has proposed a new law to make the constructor carry out climate calculus for construction of all new buildings. In this study the climate impact from the construction phase of a retirement home is calculated and suggestions of alternative materials and technical solutions are made to show the potential reduction of CO2e. By using Byggsektorns Miljöberäkningsverktyg, BM, the study showed a potential for climate impact reduction using solutions and material changes. By planning for the use of low-impact-materials the climate impact in the construction phase, A1-A5, can be decreased for the studied parts by 21-42 % compared to the building without alterations. The suggested alternative solutions have been focused on the building materials, the building services system are not included. The study’s results also showed concrete and construction steel as the materials contributing to most of the building materials total climate impact. As most of the building’s foundation consists of these materials, the foundation has the largest climate impact and therefore the highest reduction potential. The study suggested that the biggest part of materials’ climate impact originate from the production of the materials and through recycling and reusing construction materials the impact can be severely reduced. Different combinations have been examined and one alternative with solutions that are judged to be easy to apply, existing technical solutions of today had potential of reducing the impact with 21 %. With construction projects starting to conduct climate impact calculations, the results support that Sweden is on its way to fulfill several of the sub goals set by and for the construction sector.
Original language | Swedish |
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Qualification | Master |
Supervisors/Advisors |
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Place of Publication | Lund |
Publisher | |
Publication status | Published - 2020 |
Subject classification (UKÄ)
- Building Technologies