| dc.description.abstract | A large proportion of the total emission from the building and construction industry are related to the production of building materials. In buildings with low energy needs, building materials make up a large percentage of the building’s total emissions. There is thus a great potential for reducing environmental impacts from building materials. By optimizing the environmental friendliness throughout the life cycle, this can be reduced. This report will try to answer how the integration of BIM and LCA during and in the final phase of the building’s lifetime can reduce the building’s environmental impact. The focus of the thesis har been on the combination of BIM and LCA in the final phase, because it is in this phase that one can consider reuse and reuse of the components and materials. A disadvantage of this phase is that there may be a lack of data on the materials due to time and varying documentation. Methodological simplifications of the building’s LCA are therefore considered necessary to make the analysis suitable for use.
Among other things, a literature study has been used to establish the theoretical framework, to answer problems of the thesis. It has also been investigated how we can redocument construction products with potential for reuse. This has been investigated with a theoretical approach. Furthermore, a practical approach has been taken with quantity calculations and LCA, based on 3D models from Sweco building in Bergen. The emissions from defined elements in the models were calculated in One Click LCA. Due to lack of documentation, generic emission values were used.
Based on the investigations in the theoretical approach, it is considered that documentation of construction components is possible, but can potentially be time-consuming and costly. It is also pointed out that an increased focus on design for deconstruction, as well as active incorporation of reusable materials should be sought. It is also considered that an LCA of an existing building van provide valuable information about the reuse and reuse potential of a structure. The quality and development of the model greatly affects the time spent and the validity of the results. In order for the circularity score and the life cycle analysis to strive for the true values, it is essential to use the actual EPDs belonging to the project. In order to further drive a better circular economic operation of the construction industry, the focus should be on development and digitalization. | |