BS EN 13562:2000 – Geotextiles and geotextile-related products – Determination of resistance to penetration by water (hydrostatic pressure test)

This European Standard specilies a hydrostatic pressure method for determining the resistance of dry geotextiles to penetration by water.
2 Normative references This European standard incorporates by dated or undated reference, provisions from other publications.
These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European standard only when incorporated in it by amendment or revision. For undated references the latest edtion of the publcation referred to aples (including amendments). ISO 554 Standard atmospheres for conditioning and/or testing
– Specilications EN 963 Geotextiles and geotextile related products
– Sampling and preparation of test specimens
3 Principle
The hydrostatic pressure sported by a dry geotextile is a measure of the opposition to the passage of water through the geotextile. A specimen is subjected to a steadily increasing pressure of water on one face, under standard conditions, until penetration occurs. The pressure, at which water penetrates the geotextile, is noted. The water pressure may be applied from below or from above the specimen. The chosen atemative should be stated in the test report. The result is immedately relevant to the behaviour of geotextiles which are subjected to water pressure ftor short or moderate periods of time. The method is primarily intended for low permeability geotextiles.
4 Apparatus
4.1 The apparatus used for the test should be designed to comply with the fllwing condions.
4.1.1 It should be possible to clamp the circular specimen of geotextile in such a way that:
– it is horizontal and not bulging;
. a circular area of the specimen of (100土1) cm2 is subjected to steadily increasing water pressure from below or from above the specimen;
– no leakage of water takes place at the clamps during the test;
– the specimen does not slip in the clamps:
– any tendency for penetration to occur at the clamped edge of the specimen is minimised.
BS EN 13562:2000 – Geotextiles and geotextile-related products – Determination of resistance to penetration by water (hydrostatic pressure test)