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ONORM EN ISO 11058:2019
Geotextiles and geotextile-related products - Determination of water permeability characteristics normal to the plane, without load (ISO 11058:2019)
This document lays down two test methods for determining the water permeability properties of a single-layer geotextile or geotextile-related product normally at its level: a) the process with constant pressure height and (b) the process with falling Pressure height.
Austrian Standards Institute [on]