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Yarahmadi, Nazdaneh; Gevert, Thomas. Determination of the potential for recycling of polymeric products found in buildings from the 1960s and 70s: a case study. International Journal Of Low Energy And Sustainable Buildings, Stockholm, v. 1, jan. 1999. ISSN 1403-2147.
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Abstract

Buildings constructed in the late 1960s and 1970s in Sweden, which are now gradually being demolished, have been investigated in respect of the potential for recycling of various polymeric materials. Three residential blocks were investigated in order to determine the quantities of materials, the difficulty of, and time required for, dismantling, the degree of cleanliness and the possibility of separation of materials. The oldest building contained very little polymeric products apart from floor covering, which was heavily degraded. In the other two buildings, window profiles, door frames, pipes, cables and conduits seem to be the most suitable products for recycling. Plastic floor coverings constituted the largest part in all the buildings but the cleanliness of the materials was poor. Dismantling of most products took 10 minutes to 1 hour per apartment using simple tools but the number of working hours can probably be halved using more effective methods and specially trained and experienced manpower. In most cases, materials were contaminated and to achieve cleanliness suitable for recycling would require additional simple or advanced separation and purification procedures before processing. One inconvenience in collecting and sorting of products is presented by changes, which occur during service life. Some products had been replaced once or more, while some materials had been used in a way that complicates separation to a great extent (e.g. PVC floor covering glued to linoleum floor covering). It is not generally possible to determine the technical quality or remaining lifetime of collected materials without testing. It is therefore important to identify suitable, simple and quick methods for evaluation of these properties.
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