Page 5 - dantonit-brochure-naturprodukter-a4-en-lr
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Material Thickness Permeation time Water penetration
0.003 liters/m2/day
DantoCrude 0.5 m 302 years 0.003 liters/m2/day
0.004 liters/m2/day
DantoCrude 0.4 m 195 years 0.007 liters/m2/day
0.013 liters/m2/day
DantoCrude 0.3 m 111 years 0.100 liters/m2/day
DantoCrude 0.2 m 50 years
DantoCrude 0.1 m 13 years
Permeability criterion according to EN 14150
Calculation of permeation time and water penetration for a DantoCrude membrane is based on Darcy’s law, and a hydraulic conductivity
of 1.5x10-12 m/s has been used for DantoCrude. Geosynthetic barriers made of plastic and rubber are typically tested in accordance with
EN 14150, where water penetration with a 10-meter water column is measured after 20 days. The permeability criterion for these materials
is a maximum water penetration of 0.1 liters/m2/day. This criterion is easily met by DantoCrude. Furthermore, it will take many years before
any water penetrates a DantoCrude membrane. The thicker the layer of DantoCrude, the longer it will take. Due to their lesser thickness,
typically 1–2 cm, membranes of bentonite matting have a permeation time of a few days and do not meet the permeability criterion according
to EN 14150 applicable to geosynthetic barriers.
