ABSTRACT

The amount of different minerals in tunnel excavation material varies in a large range. Therefor industrial clients who could be interested in raw materials extracted from underground construction sites were investigated. Parallel to the development of ad-vanced online technologies for analysing the excavated materials research is looking for important information regarding requirements for raw materials used in industrial process-es, which are grain size distribution, mineralogical composition, geochemistry as well as different water content and water absorption properties.