This document specifies a method for determining the constant-head water flow capacity within the plane of a geotextile or geotextile-related product, using boundary materials and test conditions of interest. A standard series of test conditions are proposed, involving soil confinement, low hydraulic gradients, seating times and an array of normal loads.
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Apparatus and materials
6 Specimens and boundary conditions
6.1 Handling
6.2 Selection
6.3 Number and dimensions
6.4 Granular materials used as boundaries
6.5 Specimen condition
7 Test procedure
8 Calculations and expression of results
8.1 Products with a continuous structure (i.e. with no discrete draining elements)
8.2 Products with discrete draining elements
8.3 Graphical representation
9 Test report
Annex A Determination of the correction factor RT for conversionto a water temperature of 20 °C (informative)
Annex B Experimental data and calculations for a specimen (informative)
Annex C Use of a reference soil as a boundary condition (informative)
ISO 10318-1:2015 Geosynthetics -- Part 1: Terms and definitions
ISO 2854:1976 Statistical interpretation of data -- Techniques of estimation and tests relating to means and variances
ISO 5813:1983 Water quality -- Determination of dissolved oxygen -- Iodometric method
ISO 10318-1:2015 Geosynthetics -- Part 1: Terms and definitions
ISO 2854:1976 Statistical interpretation of data -- Techniques of estimation and tests relating to means and variances
ISO 5813:1983 Water quality -- Determination of dissolved oxygen -- Iodometric method
ISO 9862:2005 Geosynthetics -- Sampling and preparation of test specimens
ISO 9863-1:2016 Geosynthetics -- Determination of thickness at specified pressures -- Part 1: Single layers