Introduction: Over the last few decades there has been a great increase in the attention to Corporate Social Responsibility. Organizations that up until recently have had profit maximization and shareholder value as their only concerns have found themselves in a position where stakeholder demands have created pressure to produce and act on sustainability agendas. Concepts like intergenerational equity, wealth distribution, equality and macroeconomic stability became a part of everyday business language and these days the majority of firms communicate a variety of CSR related issues through annual or separate sustainability reports. Up until recently the construction industry has managed to avoid such demands, however lately, the pressure from various stakeholders such as society, activist groups, governments and external competition, has put the industry among the more environmentally sensitive sectors. Although industry wide CSR involvement has increased within environmental construction management, much is still left to be done. Problem: One area which has received little attention is recycling after demolition. Most companies focus on making new building projects as environmentally friendly as possible, however hardly any attention is geared towards what happens to old buildings being torn down and the lifecycle of the old material. Although construction companies have the legal obligation to recycle hazardous material, much can be improved within the other areas especially regarding the reusing of materials from the demolishing sites which means both environmental and economical aspects are so far being overlooked.  Purpose: The authors aim to examine the complexities and challenges facing the construction industry in environmental management of demolition projects, and more specifically the effect this has on the recycling and reusing of materials. Methodology: In order to research the waste management practices on demolition sites the research employs interview studies conducted through qualitative mostly face-to-face and a few telephone interviews. Complementary cases were selected within different categories of the construction industry sectors related to demolition projects: client, construction, demolition and waste management companies’ employees were interviewed. Conclusion: The results show that companies within the construction industry realize the potential negative effects their line of business has on the environment. Sustainability agendas in all cases focus extensively on environmental management, which includes proper disposal of demolition waste. The main benefits for recycling and reusing (in some cases reselling) the material were financial incentives and generated competitive advantage, which resulted in better competitiveness concerning procurement. The main challenges identified are time and monetary constraints. Lack of regulation, common standard that would enable firms to compete equally, and lack of common effort and cooperation towards more efficient waste management practices on demolition sites were identified as main hindering factors for industry wide improvement.

The waste framework directive from the European Commission states that 70 percent of allconstruction- and demolition waste (CDW) should be reused or recycled. In Sweden during theyear of 2018, 52,1 percent of the generated CDW was reused or recycled, but a report fromAvfall Sverige showed that reuse only accounted for small fractions of this. According to theEU's waste hierarchy, waste reduction followed by reuse are the most desirable ways to handlewaste. Research for how to reuse CDW is therefore considered an interesting and relevant topicfor research to help achieve the goal of the waste framework directive. The purpose of this master thesis was to further develop a Multi Criteria Analysis (MCA)model which was applied on different building components to evaluate how well suited theywere for reuse considering; (1) financial return, (2) environmental impact, (3) energyconsumption and (4) external aspects. The study was performed as a case study and the appliedmethods within the case study were interviews, a survey as well as the MCA model. To estimateaspects one to three of the MCA model, the theoretical framework consisted of a Cost BenefitAnalysis (CBA) and a Life Cycle Analysis (LCA) in accordance with the European standardEN15978. The fourth aspect was evaluated with help of a survey to assess qualitativedimensions of reuse. The study concluded that there are many challenges related to reuse in demolition projects.Some major challenges identified were the limited time frames, absence of competence andexperience among actors as well as logistical challenges. According to the results from theMCA model, there is a difference in how well suited the studied components were for reuse.The two most beneficial components to reuse out of the investigated ones in the case studywere crushed concrete and aluminum doors. It was also concluded that the MCA model issuitable to apply in this component specific context. / Avfallsdirektivet från Europeiska kommissionen säger att 70 procent av allt bygg- ochrivningsavfall (CDW) ska återanvändas eller återvinnas. I Sverige under året 2018återanvändes eller återvanns 52,1 procent av den totala mängden genererad CDW. En rapportfrån Avfall Sverige visade dock att återanvändning endast stod för små andelar av dessa 52,1procent. Enligt EU:s avfallshierarki är avfallsminimering följt av återanvändning de mestönskvärda metoderna för hantering av avfall. För att uppnå målet i avfallsdirektivet är studierkring återbruk av CDW ett intressant och relevant ämne. Syftet med detta examensarbete var att vidareutveckla en MCA-modell (Multi CriteriaAnalysis) som tillämpades på olika byggkomponenter för att utvärdera hur lämpliga de var föråteranvändning. Fyra aspekter togs i beaktning i modellen, nämligen (1) finansiell avkastning,(2) miljöpåverkan, (3) energiförbrukning och (4) externa aspekter. Studien utfördes som enfallstudie och de tillämpade metoderna inom fallstudien var intervjuer, en enkät samt utförandetav MCA-modellen. Det teoretiska ramverket för att uppskatta aspekterna ett till tre i MCAmodellenvar en kostnadsnyttoanalys (CBA) och en livscykelanalys (LCA) som utfördes ienlighet med den europeiska standarden EN15978. Den fjärde aspekten utvärderades med hjälpav en enkät för att bedöma de kvalitativa dimensionerna av återanvändning. Slutsatsen av studien var att det finns många utmaningar relaterade till återanvändning irivningsprojekt. Några stora utmaningar som identifierats var begränsade tidsramar, avsaknadav kompetens och erfarenhet bland aktörer samt logistiska utmaningar. Enligt resultaten frånMCA-modellen finns det en skillnad i hur väl lämpade de studerade komponenterna var föråteranvändning. De två mest fördelaktiga komponenterna att återanvända av de undersökta ifallstudien var krossad betong och aluminiumdörrar. Vidare drogs slutsatsen att MCAmodellenär lämplig att använda i detta komponentspecifika sammanhang.