TEXTILE TESTING, SOIL MECHANICS, MEMBRANES, TEST EQUIPMENT, PERMEABILITYMEASUREMENT
适用范围
1. PURPOSE AND SCOPE 1.1 This method is for the determination of the water permeability of
woven, knitted and non-woven geotextiles in a direction normal to the
plane of the geotextile. 1.2 This procedure is not applicable to the measurement of the normal
permeability of geotextiles under load. 1.3 As there are many applications and environmental conditions under which
a geotextile may be used, care should be taken when attempting to apply
the results of these test methods to the field performance of a
geotextile. 1.4 This method enables the measurement of the normal water permeability of
geotextiles under no load and is considered satisfactory for acceptance
testing of commercial geotextiles. The norme water permeability is
used to compare the geotextile permeability to the permeabilities of
other porous media. 1.5 As there are fabrics of various thicknesses in use, it is often more
indicative to evaluate the quantity of water which would pass through a
geotextile under a given water head over a particular cross-section
area. Permittivity is an expression of this and is used to compare
geotextiles. 1.6 The testing and evluation of a product against this method may require
the use of materials and/or equipment that could be hazardous. This
document does not purport to address all the safety aspects associated
with its use. Anyone using this method has the responsibility to
consult the appropriate authorities and to establish appropriate health
and safety practices in conjunction with any existing applicable
regulatory requirements prior to its use.