The use of the LCA-tool One Click LCA with the help of BIM for more efficient climate and life cycle assessments

The construction and real estate sector contributed with about 18 tons of carbon dioxideequivalents which corresponds to almost 21 percent of Sweden’s total greenhouse gasemissions. Fact is that the construction and real estate sector contribute a significant part inthe climate impact.An approach to examine a building’s environmental impact is to implement Life CycleAssessment (LCA). By doing that a full picture of the climate impact during the building’slifetime can be seen. The results can be used to find out in what stage of the building processimprovements can be done to reduce the climate impact.The purpose of this study is to examine and understand how to execute Climate CycleAssessments and Life Cycle Assessments and how they can support the decisions forbuilding constructions with less climate impact. The aim is to examine digital conditions thatare required to be able to integrate the BIM-software Revit with One Click LCA. The study islimited to analyzing the frame and the foundation of a building. Only LCA-modules A1-3will be calculated because these modules are included in the mandatory climate declarationfrom year 2022. A1-3 includes raw material extraction, transport and manufacturing.The study is based on a qualitative method, where information is obtained from literaturestudies and semi-structured interviews to answer the questions of this study. The literaturestudy is done by using scientific articles, reports, and literature. Semi-structured interviewsare accomplished with relevant respondents. The software that is used to execute the analysisis One Click LCA, which is integrable with Revit due to an add-in in the program.The integration between BIM and LCA was tested by using One Click LCA:s add-in tool inRevit, a result was then available but a completion had to be done in One Click LCA:s webapplication to get a result that includes the carbon dioxide equivalents from the modulesA1-3. An update of One Click LCA:s add-in program should be developed to avoid extrawork and save more time. It is worth mentioning that the current add-in tool already haspossibilities to save money and time, it also increases the possibilities to reduce the climateimpact in an early stage.Keywords: Life cycle assessment, climate impact, BIM, Revit, One Click LC