The protection of water, especially groundwater against all kinds of contaminants, whatever their chemical concentration, solubility and physical mobility may be, must have high priority as it is proven that there is almost no biodegradation of these contaminants, and if so at all, this process is very slow. Up to now the groundwater was considered to be the safest water resource due to the filter-effect of the soil and thus was to be used for the production of drinking water in the future. However, this statement is not reliable any longer. It is therefore necessary to completely avoid jeopardy and the expansion of present contamination and to pay increasing attention to the groundwater by working on possible engineering solutions. In this respect various guidelines have been established, however it has become obvious that they are not suffficient enough. With regard to settlements, flexural bending performance, weld seams and embankments special requirements turned out to be necessary, which will be briefly explained hereafter. Underneath the backfill of a disposal the liner is exposed to high elongations and deformations and is expected not to be influenced in its long-term behaviour, even when chemical and mechanical stresses are added. This means that the elongation of a material may not have a negative impact on its chemical long-term resistance and its resistance to interchrystalline stress-crack corrosion.
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- New Requirements and Developments for Groundwater Protection with Plastic Liners
Dr. R. Krause
- Springer Netherlands
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