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DIN 12957-1

Geosynthetics — Determination of friction characteristics — Part 1: Direct shear test
This Standard describes a method of determining the friction characteristics of geotextiles and geotextile-related products in contact with a standard sand, i.e. sand with a specified density and moisture content, under a normal stress and at a constant rate of displacement, using a direct shear apparatus.
The procedure can also be used for testing geosynthetic barriers.

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