Development of mechanical-hydraulic models for the prediction of the long-term sealing capacity of concrete based sealing materials in rock salt : project titel LASA / GRS, Gesellschaft für Anlagen- und Reaktorsicherheit (GRS) gGmbH ; Oliver Czaikowski, Jürgen Dittrich, Uwe Hertes, Kyra Jantschik, Klaus Wieczorek, Bernd Zehle