Global ETD Search

1	Effektivare Askåterföring : Kombimetoden Magnusson, Johan, Lindblad, Michael January 2013 (has links) Undersökningens resultat visar att det finns betydande kostnadsbesparingar att göra vid införandet av en ny metod för askåterföring. Den nya metoden medför betydligt mindre transporter vilket leder till ett reducerat utsläpp av koldioxid och andra ämnen som har en negativ miljöpåverkan. I den nya metoden utnyttjas i viss utsträckning timmerbilarnas lediga kapacitet för transport av aska ut till spridningsområdet vilket då ökar chansen till högre lönsamhet för åkerinäringen. Askåterföring Lönsamhet Näringsuttag Näringsbalans Markförsurning Wood fibre and forest products Träfiber- och virkeslära
2	Fornlämningars risk och sårbarhet till följd av vintervägsaltning på det kommunala– och statliga vägnätet i ett förändrat klimat : Litteratur– och fältstudie om korrosion av artefakter, samt identifiering av riskområden genom en GIS–analys i Södermanland och Västmanland. / The risk and vulnerability of ancient historic sites as a result of winter road salting on the municipal– and state road network in a changed climate : Literature– and field study on corrosion of artifacts, identification of risk areas through GIS–analysis in the country of Södermanland and Västmanland in central Sweden. Larsson, Andreas January 2020 (has links) Archaeological artefacts excavated today are in a worse preserved state compare to those artefacts found before 1945. Previous research highlighted soil acidification as the main cause. However, not much research has been done to analyse other causalities, such as the spread of road salt during the wintertime and the potential deterioration that salt (sodium chloride) might cause on the physical cultural heritage. Nonetheless, it is proven that salt causes corrosion on infrastructure and on porous stone, masonry, and other composite materials in buildings. The aim of this work is to investigate how road salt move from the road surface (municipal– and state roads) and beyond, what factors might contribute to increased geographical spread and how we can limit the potential risk of damage associated with the spread of road salts to ancient historical sites. The research methods presented in this paper is a mix of field sampling study together with GIS– and literature analysis. The results show that the road salts spread according to an exponential decaying rate, where most of the road salts being spread 5–10 meters beyond the roadside. This means that cultural heritage sites within this buffer–area could be susceptible to salt induced damage to physical structures and deposited artefacts made from metals, rock, brick, and other material. Thereby it is pivotal to highlight the possible actions that can prevent the spread of road salts in a geographical landscape, and its effect on the physical cultural heritage. Adaptive actions conservation conditions de–icing agent corrosion soil acidification risk and vulnerability spatial interpolation salt blasting winter maintenance work winter road salts. Anpassningsåtgärder bevarandeförhållande halkbekämpningsmedel korrosion markförsurning risk och sårbarhet rumslig interpolation saltsprängning vinterunderhåll vintervägsalt. Archaeology Arkeologi

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Effektivare Askåterföring : Kombimetoden