En jämförelsestudie mellan stommaterial av KL-trä och betong med hänsyn till miljön, byggtid och ekonomi samt redovisning av lokala aktörers åsikter. / There is a housing shortage in all municipalities in Östergötland and housing construction is limited by expensive production costs and conflicts with the Environmental Code. In combination with meeting future housing needs, it is also necessary for the construction industry to switch to climate neutrality as the parliament has decided that Sweden will have no net emissions of greenhouse gases in 2045. The purpose of the report is to study the effects of building multi-story apartments with a wooden frame in comparison against concrete and examine how local developers and contractors view such a building technology solution. This is done by investigating the effects of choice of frame material on a reference object with regard to environment, construction time and economy. Further to compile advantages and disadvantages with the material selection according to local developers and contractors and to illustrate what may prevent a more progressive transition to a wooden frame. To answer the study's first question, data from a reference object with a CLT frame is compared against an applied concrete frame with regard to selected parameters. The second question is answered through interviews with developers and contractors where answers from respondents are compiled and analyzed. The degree project began with a literature study to acquire knowledge in order to be able to answer the study`s questions in an adequate way. In the following step the construction documents for the reference object provided by the developer Bo Sundberg were studied. A quantity takeoff was necessary to be able to determine the material consumption. The CLT frame was replaced with an applied concrete frame and then compared against each other. In parallel with the comparative study, interviews were conducted with local developers and contractors. The study shows that the construction time for assemble and casting goes faster for the CLT frame, but at the same time entails extensive supplementary work. The results also show that the CLT frame contributes to a smaller net emission of greenhouse gases and that the total cost of construction is slightly lower than the corresponding frame in concrete. In the cost comparison the vibration insulation for the CLT was excluded, which may have affected the result. When compiling the interviews, it emerged that the local developers and contractors agree that the CLT frame is the more environmentally friendly alternative. The main reason for not building with a CLT frame was considered to be related to price. Other factors that prevent the CLT frame from having a greater impact are according to the respondents, that the real estate industry is conservative and that more knowledge and increased understanding of the material´s positive properties is needed. The municipality and the state are considered important participants in driving the development forward. Even though there is a consensus in the industry that CLT frames are the more environmentally friendly alternative, there are cost concerns which means that developers and contractors do not like to abandon conventional proven methods. An increased incentive for climate-smart construction could change their minds and lead to an increased awareness of the construction technology. / <p>Examensarbetet är utfört vid Institutionen för teknik och naturvetenskap (ITN) vid Tekniska fakulteten, Linköpings universitet</p>
| Identifer | oai:union.ndltd.org:UPSALLA1/oai:DiVA.org:liu-181874 |
| Date | January 2021 |
| Creators | Jungell, David, Kjellbom, Joakim |
| Publisher | Linköpings universitet, Kommunikations- och transportsystem, Linköpings universitet, Tekniska fakulteten |
| Source Sets | DiVA Archive at Upsalla University |
| Language | Swedish |
| Detected Language | English |
| Type | Student thesis, info:eu-repo/semantics/bachelorThesis, text |
| Format | application/pdf |
| Rights | info:eu-repo/semantics/openAccess |
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