Valdes rätt betongstomme? Miljö och ekonomi för byggnadsstomme i betong

Sammanfattning: Economy is and has always been the basis for any investments to get the most value for yourmoney. Today, when environmental debate gets a lots of room in media, the environmentalimpact has to be considered in the decision of which alternative to choose.The report describes the result of a capital budgeting and a simplified Life Cycle Assessment(LCA) with a focus on carbon dioxide, nitrogen oxides and sulphur dioxide and for theconcrete structure of CHABO, a block of student flats at Chalmers university campus. Wehave compared two different ways to build, on site with in-situ concrete and a facade of bricksand one alternative with precast concrete elements which would serve as a facade. In order tolink the economy to the environmental impact the concept of eco-efficiency is used.The results show that the prefabricated option is clearly better with respect to carbon dioxideand sulphur dioxide emissions, while emissions of nitrogen oxides and dust are broadlysimilar. Emissions of carbon dioxide can be largely attributed to the cement and gypsumproduction while the shipping by boat is responsible for the emissions of acidifyingsubstances.