Beitraege zur Deponietechnik 4 Verformbarkeit, Risssicherheit und Dichtigkeit von mineralischen Deponiedichtungen

The tensile strength of sealing materials for dump basis sealings has been studied with different test methods, different materials and different state of materials. In a large-scale model test the flow throw deformed and cracked gravel sealings has been studied. A calculation model confirms that maximum crevice security is achieved by low values of the effective shear parameters and by high water contents of the sealing material. Investigations on surface sealings revealed the decisive role of the geotextiles under the mineral sealing layer for self-repairing surface sealings. Bentonite containing gravels are best suited at expensions up to 2.5%, while for higher expensions a clay of high plasticity is proposed for surface sealings as the material with the best self-repairing properties. (WEN)Available from TIB Hannover: RO 3301(10) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEDEGerman