ISO 12956 wet-sieving method geotextile opening size test machine

ISO 12956:2019 Geotextiles and geotextile-related products — Determination of the characteristic opening size

ISO 12956 specifies a method for the determination of the characteristic size of the openings of a single layer of a geotextile or geotextile-related product using the wet-sieving principle.

ISO 12956 wet-sieving method geotextile opening size test machine Test principle: With the untensioned single-layer geotextile and its related product samples as a screen, under the specified vibration frequency and amplitude, the sample and graded granular material are sprayed with water, so that the granular graded material passes through the sample. The effective pore size of the specimen is indicated by the passing particle material and the specific particle size.

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