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Purkubetonin käyttö pihan rakenteissa: tapaus Pappilanniemi

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Purkubetonin käyttö pihan rakenteissa: tapaus Pappilanniemi

Replacing virgin materials with recycled materials, reuse of materials and reduction of waste is a megatrend. Sustainable landscaping, or KESY in Finnish, means utilizing local material in a cost-effective manner. If possible, virgin materials are replaced with recycled materials. It has been estimated that approximately 1.5–2.5 million tons of concrete waste is generated annually in Finland, about half of which is demolition concrete. The Environmental Protection Act, the Waste Act, the Land Development Decree and the EoW (End of Waste) Decree regulate the handling of waste and materials at the national level. The Pappilanniemi course centre, owned by Sääksmäki parish, is situated by the lake Vanajavesi, in Valkeakoski town. There were two large brick houses from the 70s in Papplanniemi, one of which was demolished in the winter of 2022–23. It was estimated that the demolition would produce about 350 t of demolition concrete. There was a need to upgrade the yard and the area around the demolished building. It was requested that the empty space would be filled with various activity-sites serving the needs of the course centre. In this practice-based thesis, options for yard functions and the possibility of using demolition concrete on site are examined. The cost calculation was done using the FORE program based on a draft garden plan for the parish's budgeting. The yard plan draft and various details were drawn up with Vector Works. Theoretical mass calculations were made according to the existing measurement data, height curves and terrain forms on the map. Three-dimensional modelling was not used. Handling of demolition materials and playground equipment produces most costs. Project implementation is phased. In the draft, an attempt was made to harmonize modern buildings and courtyard with the cultural landscape of Häme region. During this thesis prerequisites for handling demolition concrete at on site became clear. According to the EoW Regulation, demolition concrete must be transported to a fixed waste station for further processing. So far there are no ’processing plants’ which could be transported from a site to another to reduce transport needs of the demolition concrete. The Land Construction Ordinance was followed in Pappilanniemi. The demolished concrete was used to expand the upper parking area, more than 30 m from the lakeshore. The material was used locally, which reduced the need for transportation and thus emissions were saved by an estimated 1.7-2.1 t CO2eq. Keywords: Demolition concrete, reuse, recycled materials, Pappilanniemi Pages 39 pages and appendices 3 pages

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