Untersuchungen zum Langzeitverhalten chemisch immobilisierter Abfall- und Reststoffe in untertaegigen Hohlraeumen. Anhang Schlussbericht

The scientific state of the art at the beginning of the project was such that elution tests had to be improved by the realisation of the in-situ-conditions. The laboratory tests had to be adapted to the environment of the underground mining nad minefilling activities in German hard coal mines in the Ruhr district. For the simulation of the in-situ-conditions it was necessary to improve standard test methods and to develop new elution tests. Especially the application of pressure, temperature and contact of the residues with mine waters was of interest in the laboratory tests. It could be proved that there are different results between standard methods and the chosen test conditions. The elevation of pressure adn temperature leads to lower hydraulic conductivities and higher specific heavy metal discharges in the most cases. This can be significantly reduced by using binding agents. For the underground disposal of residues from waste incinerator plants it is necessary to include the in-situ-conditions and die long-term chemical environment into laboratory tests. The results lead to conclusions about the behavior of stabilized and solidified residues when filled into voids of German hard coal mines. (orig.)SIGLEAvailable from TIB Hannover: F95B2507+a / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekBundesministerium fuer Bildung, Wissenschaft, Forschung und Technologie, Bonn (Germany)DEGerman