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Standard [CURRENT]
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This standard specifies a method for determining the water absorption of bentonite. Bentonite is a part of clay geosynthetic barriers (GBR-C). Water absorption depends on the specific surface of the fine particles and the surface activity of the bentonite. The test provides an index value for production control testing of clay geosynthetic barriers (GBR-C). The amount of water absorbed in relation to the dry mass of the bentonite sample is determined over time by an automatic electronic balance system. The water absorption value is determined during a test period of 24 hours. Different bentonite samples can be compared using water content diagrams. The Committee responsible for this standard is NA 106-01-11 AA "Geotextilien und Geokunststoffe; SpA zu CEN/TC 189 und ISO/TC 221" ("Geotextiles and geosynthetics; Mirror Committee of CEN/TC 189 and ISO/TC 221") at DIN.