Träkolslera - en experimentell studie av blandningsförfarandet

Abstract

Clay is a building material that could well be used as an alternative to Swedish conventional building materials. New research suggests that due to climate change greater focus needs to be put on the production of building materials and not only the operational phase of the building. Since clay building technique cannot be classed as an established construction technology in Sweden some factors are lacking sufficient knowledge. There is no existing study that treats the mixture of clay and charcoal, the material produced in this work would therefore complement the existing materials straw clay, wood chips clay and haydite (Leca) clay. This work can, through practical experiments on construction solutions and operation, contribute to developing the inadequate state of knowledge in Sweden. The aim of this work was that by laboratory experiments with different proportions of granulated clay, charcoal, sand and water produce a filling material with heat insulating properties for constructions. The following questions have been answered in this work: - What parameters are important or even crucial for the cohesion of the material? - In which degree is the material heat-insulating? - How does the material affect building's internal environment and the external environment, during the life of the material? To answer the first question about the cohesion of the material clay granules, charcoal, sand and water were mixed in different ratios and then analyzed. The material were then applied into a timber frame construction. Pondered and brought a hypothetical discussion of the heat-insulation value of charcoal clay to answer the second. The third question was answered by gathering information from literature and scientific publications which then were applied on the results. Finally other factors were discussed such as how the mixing process affected the results in terms of cohesion, the isolation ability of charcoal clay and rationality linked to the production process.