Är ett cirkulärt retursystem eller användning av förnyelsebara material att föredra? : Jämförande LCA av underslag för leveranser av gips
Sammanfattning: Due to the large quantities of waste in the construction industry, a circular return packaging system is evaluated as bearers used for gypsum deliveries. The master thesis is written together with the construction company JM AB with the goal of being able to support future strategies for the development of more sustainable packaging solutions. This has been done by a comparative life cycle analysis of the current linear system of wood chips bearers, which is compared with a theoretical circular system of plastic bearers used with a return system. The two different bearers with respective processes are compared, in order to evaluate the environmental impact and further evaluate the conditions when a return system is preferable. By creating two life cycle analyses of both systems in the SimaPro computer software and comparing them with the functional unit, 50 deliveries of 42 discs of gypsum are the two different ways of delivering gypsum compared. The result shows that two returns per plastic bearer are needed to ensure that the seven selected environmental impact categories are lower than using wood chips bearers. In the sensitivity analysis, different scenarios are tested, where one conclusion of the analysis is that the type of energy used for the manufacture of the bearers is very important for the result. The discussion addresses the problem that plastic is not a renewable material, and today's conditions on construction sites result in return packaging being handled as disposables.
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