Filtern
Erscheinungsjahr
Dokumenttyp
- Beitrag zu einem Tagungsband (50)
- Zeitschriftenartikel (46)
- Vortrag (18)
- Beitrag zu einem Sammelband (14)
- Forschungsbericht (4)
- Corrigendum (1)
Schlagworte
- Geokunststoffe (25)
- Deponieverordnung (18)
- BAM-Zulassung (8)
- Kunststoffdichtungsbahnen (8)
- Geosynthetics (6)
- Kunststoff-Dränelemente (6)
- Deponie (5)
- Durability (5)
- Scherfestigkeit (5)
- Deponieabdichtungen (4)
- Geomembranes (4)
- Landfill (4)
- Oxidative resistance (4)
- XPS (4)
- Zulassung (4)
- Zulassungsrichtlinien (4)
- Aging (3)
- Beständigkeit (3)
- Bewehrungsgitter aus Kunststoff (3)
- CE-Kennzeichnung (3)
- Composite liner (3)
- Deponien (3)
- Geogitter (3)
- Geogrid (3)
- Geotextile (3)
- German landfill ordinance (3)
- Hydrolytic degradation (3)
- Langzeitverhalten (3)
- Lebensdauer (3)
- Long-term behavior (3)
- Oberflächenabdichtungen (3)
- Oxidation (3)
- Poly(ester urethane) (3)
- Schweißen (3)
- Shear strength (3)
- Thermo-mechanical properties (3)
- Active polymers (2)
- Anchoring (2)
- Antioxidant (2)
- Contaminant transport (2)
- Deponieabdichtung (2)
- Deponieabdichtungssysteme (2)
- Deponieoberflächenabdichtung (2)
- Deponietechnik (2)
- Efficiency testing (2)
- Ellipsometry (2)
- Fremdprüfung (2)
- Geocomposite drain (2)
- Geogrids (2)
- Geotextiles (2)
- HDPE geomembrane (2)
- Hydrolysis (2)
- Landfill capping system (2)
- Landfill cover systems (2)
- Landfill lining (2)
- Leak detection systems (2)
- Long-term testing (2)
- Organic contaminants (2)
- PE-HD-Dichtungsbahnen (2)
- Polyester (2)
- Prüftechnik (2)
- Shape memory polymers (2)
- Slope stability (2)
- Stabilization (2)
- TEM (2)
- Test methods (2)
- Thickness (2)
- Water flow capacity (2)
- Abminderungsfaktor (1)
- Altdeponien (1)
- Alterung (1)
- Altlasten (1)
- Antioxidant depletion (1)
- Autocalve testing (1)
- Bauproduktenverordnung (1)
- Baustoffe (1)
- Bemessung (1)
- Bewehrte Erde (1)
- Bewehrungsgitter (1)
- Bispidines (1)
- Bodenmechanik (1)
- Bremsbelag (1)
- Building materials (1)
- Calibration (1)
- Capping system (1)
- Certification guidelines (1)
- Chelates (1)
- Chemical reduction factor (1)
- Coastal protection (1)
- Composite liner system (1)
- Contaminant transport modelling (1)
- Contaminants (1)
- Core-shell (1)
- Core-shell nanoparticles (1)
- Creep (1)
- Creep behavior (1)
- Creep rupture (1)
- DIBt-Zulassung für LAU-Anlagen (1)
- Damage (1)
- Degradation (1)
- Deiche (1)
- Deponieabdichtunssysteme (1)
- Deponieoberflächenabdichtungen (1)
- Deponietechnik - Landfill technology (1)
- Deponietechnik - Landfills (1)
- Design with reinforced soil (1)
- Dichtungskontrollsysteme (1)
- Drain core stability (1)
- Drain elements (1)
- Drainage (1)
- EBGEO (1)
- EDA-Empfehlung (1)
- Eignungsgutachten (1)
- Eignungsnachweis (1)
- Einbau (1)
- Electric leak monitoring system (1)
- Europäische Normen (1)
- FIB (1)
- Factor of reduction (1)
- Filtration (1)
- Filtration criteria (1)
- Funktionsprüfung (1)
- GCD (1)
- GDA-Empfehlung (1)
- GIXRR (1)
- Geocomposite drains (1)
- Geoenvironmental engineering (1)
- Geokunststoffe - Geosynthetics (1)
- Geomembanes (1)
- Geomembrane (1)
- Geosynthetic (1)
- Geosynthetic clay liner (1)
- Geosynthetic drain elements (1)
- Geotechnik (1)
- Geotextile Filter (1)
- Geotextilien (1)
- Gleiten (1)
- Hangparalleles (1)
- Herausziehkraft (1)
- Hydrocarbon (1)
- Hydrolyse (1)
- Imaging agents (1)
- Installation (1)
- Interlaboratory study (1)
- Junction strenght (1)
- Junctions (1)
- Kreislaufwirtschaft (1)
- Kunststoff-Dränelement (1)
- Kunststoffdichtungsbahn (1)
- Laborversuche - Laboratory tests (1)
- Landfill cappings (1)
- Landfills (1)
- Lanthanides (1)
- Leaks and holes (1)
- Long-term behaviour (1)
- Long-term shear strength (1)
- Long-term water flow capacity (1)
- MEIS (1)
- Metal fluorides (1)
- NRA (1)
- Nanoparticles (1)
- Neutron reflectometry (1)
- Non-woven (1)
- Normung (1)
- Nuclear medical application (1)
- Oxidative Alterung (1)
- Oxidative degradation (1)
- Oxidative induction time (1)
- Oxidative resistance testing (1)
- PE (1)
- PP (1)
- Permeability (1)
- Polymermatrix-Verbundstoff (1)
- Polypropylene (1)
- Pull-out strength (1)
- Quality management (1)
- Qualitätssicherung (1)
- Qualitätssicherung - Quality Assurement (1)
- RBS (1)
- REM (1)
- Radioactive labelling (1)
- Radiolabeling (1)
- Reibungsversuch (1)
- Rekultivierung von Altlasten (1)
- Röntgenfluoreszenzanalyse (1)
- SIMS (1)
- SPECT (1)
- Shape memory polymer (1)
- Shear box test (1)
- SiO2 (1)
- Silicon dioxide (1)
- Size (1)
- Sliding failure (1)
- Soil mechanics (1)
- Sol-gel synthesis (1)
- Stabilizers (1)
- Standsicherheit (1)
- Synchrotron radiation (1)
- T-SEM (1)
- Testing (1)
- Thin films (1)
- ToF-SIMS (1)
- Transport modelling (1)
- Umwelttechnik/Umweltschutz - Environmental Technology/Protection (1)
- Verankerung (1)
- Verlegefachbetrieb (1)
- Wasserbau (1)
- Weathering (1)
- Welding (1)
- X-ray photoelectron spectroscopy (1)
- Zeitstand-Scherversuch (1)
- Zugversuch (1)
- Zulassungen (1)
Organisationseinheit der BAM
Eingeladener Vortrag
- nein (18)
Geosynthetic clay liners (GCLs) often have a sandwich-like multilayer structure, e.g. bentonite encased between two geotextile layers connected by fibers or yarns, either by needle-punching or stitch-bonding. Therefore, the internal shear strength of the GCL depends on the strength of reinforcing fiber bundles or yarns and their anchoring strength in the cover and carrier geotextiles. When used on long and steep slopes and covered with thick soil layers, the GCL is permanently exposed to a combined action of compressive and shear stress. Such load conditions are characteristic for landfill covers and the slope stability of the overall cover system in the long run strongly depends on the long-term internal shear strength of the GCL. A new test method was developed to study this long-term shear behavior. The focus was not only on creep, as it is normally done, but on aging effects. The shear test devices allow the measurement of creep curves and times-to-failure at elevated temperatures in different media (tap water and de-ionized water). In this publication, the main findings of the experiments on needle-punched GCLs with and without thermal treatment are summarized. Tap water as a test medium was essential to ensure sodium to calcium ion exchange in the bentonite layer. Under this condition extremely long test durations without failure were achieved. Sliding failure occurred when de-ionized water was used. Two failure modes were observed: brittle failure of the GCLs with thermal treatment and slow disentanglement of fiber bundles for untreated GCLs. Short-term shear strength (e.g. peel strength) is unrelated to the actual long-term shear strength, i.e. to the times-to-failure achieved in long-term shear strength test. Hence, short-term shear strength alone will not provide reliable dimensioning data for product design and choice of resins. Therefore, the often suggested approach, namely, restriction to short-term tests only and application of factors of safety, is challenged by these results.
Vor 30 Jahren wurde die erste BAM-Zulassung für ein Geokunststoffprodukt in der Deponietechnik ausgestellt. Seither wurden immer wieder eigene wissenschaftliche Untersuchungen durchgeführt, neue Forschungsergebnisse herangezogen und die Prüftechnik weiterentwickelt, um die Eignung und Funktionsdauer von Kunststoffdichtungsbahnen, Schutzschichten, Kunststoff-Dränelementen, geotextilen Filtern oder Bewehrungsgittern beurteilen zu können. Einige dieser Entwicklungen werden hier diskutiert.