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- Englisch (4) (entfernen)
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- Geosynthetics (2)
- Geotextile (2)
- Landfill (2)
- Acceleration ageing (1)
- Certification guidelines (1)
- Coastal protection (1)
- Drainage (1)
- Durability (1)
- Filtration (1)
- Filtration criteria (1)
The German landfill ordinance includes a certification requirement for geosynthetics used in landfill liner and capping systems. The certification guidelines describe the basis for the design of geosynthetics used in landfill construction. According to the rules which are usually applied, the thickness of the filter geotextile has to be at least 30 times the characteristic opening size O90. Filter geotextiles which are often used in geocomposite drains have a mass per area of 200 g/m² and do not fulfill this requirement.
In this paper modified filter criteria for geosynthetics are presented with a particular focus on These geotextile filters in geocomposite drains.
Geosynthetics are planar polymeric products, which are used in connection with soil, rock or other soil-like materials to fulfill various functions in geoenvironmental engineering. Geosynthetics are of ever-growing importance in the construction industry. Sealing of waste storage facilities to safely prevent the emission of wastewater, landfill gas and contaminated dust as well as the diffusion of pollutants into the environment and coastal protection against storms and floods and reconstruction after natural disaster are important fields of application. We will give an overview of the various geosynthetic products. Two examples of the material problems related to geosynthetics are discussed in detail: the effect of creep on the long-term performance of geocomposite drains and the numerical simulation of the interaction of soil with geogrids. Both issues are of importance for the use of these products in landfill capping systems. The various functions, which geosynthetics may fulfill in the protection of coastal lines, are illustrated by case studies. The geosynthetic market is evaluated and economical and environmental benefits, as well as environmental side effects related to the use of geosynthetics, are discussed.