This specification and guidance notes set out the material and construction requirements for geotextiles for use as separation and/or filtration applications in highway earthworks and pavements. Please note major changes in the 2003 edition of the F/7 specification.
This method can be used to determine the pore size distribution of the openings in a filter fabric by sieving.
This method can be used to provide a simple quality control test to determine the permeability of a fabric. Permeability measured by this test is expressed as millimetres head loss at a flow velocity of 10mm/second.
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