This study gives an overview over the geological and spatial distribution of German clay deposits visualized in a GIS map, which is based on the map of mineral resources, the geological map of Germany and supplemented by active clay pits. The clays are classified regarding their geological con-text. Representative clays for a certain geological formation are examined closely. Detailed clay mineralogy is determined using XRD. Optimal calci-nation temperature is defined using TG/DTG. The calcined clays are charac-terized by XRD and BET. Pozzolanic reactivity is assessed by R$^3$-test and solubility of Al and Si ions in alkaline solution. A correlation between ge-ological origin, chemical-mineralogical composition and pozzolanic reac-tivity is discussed. The study shows, that a rough estimation of pozzolanic reactivity based on geological data or chemical composition is possible. For a detailed assessment, an elaborate determination of mineralogical phase content or a direct determination of reactivity is necessary    «

This study gives an overview over the geological and spatial distribution of German clay deposits visualized in a GIS map, which is based on the map of mineral resources, the geological map of Germany and supplemented by active clay pits. The clays are classified regarding their geological con-text. Representative clays for a certain geological formation are examined closely. Detailed clay mineralogy is determined using XRD. Optimal calci-nation temperature is defined using TG/DTG. The calcined...    »