ÅTERANVÄNDNINGSPOTENTIALEN AV STOMME I STÅLHALL : THE POTENTIAL OF REUSING STEEL COMPONENT IN STEEL CONSTRUCTIONS

Sammanfattning: The construction industry accounts for about 20% of society's total greenhouse gas emissions and steel production is one of the major climate villains. To achieve set climate goals and slow down global warming, all actors, large and small, must take responsibility. One way to reduce emissions from the steel is to reuse it as it avoids the demanding manufacturing process. In Sweden, interest in the racket sport of padel has increased in recent years and many padel companies therefore chose to build padel halls around the country. The halls are now for many in terms of the number of players and most padel companies are forced into bankruptcy.This development means that empty halls will be standing around the country.The purpose of this study is to investigate the reuse potential of the frame of an existing steel hall. Is it economically and environmentally justifiable to reuse an existing steel frame compared to producing a new one? The study is based on climate calculations and cost calculations for the reuse of existing frame and new production of identical frame. Climate calculations are carried out using two different methods, one based on Boverket’s generic climate database, and one based on product-specific climate data from environmental product declarations. Through requests for quotations and discussions with actors involved in the reuse and new production process, costs are obtained for reuse and new production of frame. This study shows that it is beneficial to reuse the existing frame from an environmental and an economic perspective. The economic comparison shows that it costs about 46% less to reuse the frame compared to producing it again and in this case, it corresponds to about SEK 528,000. The product-specific climate calculations are considered more realistic and are therefore valued higher than the climate calculations based on Boverket's generic climate database. The recycled frame generates 1015 kg of carbon dioxide equivalents and the newly produced generates 17 666 kg of carbon dioxide equivalents. The climate footprint of recycled frame corresponds to about 6% of newly produced.