ABSTRACT
This chapter discusses the centrifuge model tests on this topic carried out in Bochum Geotechnical Centrifuge is given, followed by the presentation of laboratory test results from investigations on the tensile behavior of cohesive soils. To perform tensile tests in this study, a direct tension test device was developed to determine the ultimate tensile strain properties of some cohesive soils, especially those used in the centrifuge model tests. Since the tensile strain is more important when interpreting deformability of mineral liners, an dequate number of single element tests have to be carried out. A new recommendation, R 2-11, is based on the research work described above and deals with the assessment of mineral sealing layer deformation. The mineral liner thus forms a key element of the whole lining system and is the main object of this investigation. Mineral liners consist of compacted, fine grained clayey soils which provide hydraulic barriers due to their low permeability and mineralogical structure.
