ISO 12958-2:2020
Geotextiles and geotextile-related products — Determination of water flow capacity in their plane — Part 2: Performance test
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
6.3.1 Geotextile or geotextile-related product
6.3.2 Other geosynthetic products
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 (informative) Determination of the correction factor RT for conversionto a water temperature of 20 °C
Annex B (informative) Experimental data and calculations for a specimen
Annex C (informative) Use of a reference soil as a boundary condition
Bibliography
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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
6.3.1 Geotextile or geotextile-related product
6.3.2 Other geosynthetic products
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 (informative) Determination of the correction factor RT for conversionto a water temperature of 20 °C
Annex B (informative) Experimental data and calculations for a specimen
Annex C (informative) Use of a reference soil as a boundary condition
Bibliography