ISO 11058:2019 PDF

Geotextiles and geotextile-related products — Determination of water permeability characteristics normal to the plane, without load

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Title (English):

ISO 11058:2019

Geotextiles and geotextile-related products — Determination of water permeability characteristics normal to the plane, without load

Document status:: Active
Format:: Electronic (PDF)
Number of pages:: 17
Publication date:: May 29, 2019
Edition:: ISO IS 11058 edition 3 version 1
ICS:: 59.080.70

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Description (English):

This document specifies two test methods for determining the water permeability characteristics of a single layer of geotextile or geotextile-related product normal to the plane: a) the constant head method; and b) the falling head method.

Technical details

Technical committee: ISO/TC 221 - Geosynthetics
SKU: ISO 11058:2019

Abstract

Overview

ISO 11058:2019 - "Geotextiles and geotextile-related products - Determination of water permeability characteristics normal to the plane, without load" specifies two laboratory test methods to measure water permeability through a single layer of geotextile normal to the plane. The standard defines the constant head method and the falling head method, procedures for specimen preparation and handling, measurement and calculation conventions (including temperature correction to 20 °C), and reporting requirements. This is the third edition (2019), replacing ISO 11058:2010.

Key topics and technical requirements

Test methods
- Constant head: steady unidirectional flow with several constant heads (including a maximum head ≈ 70 mm).
- Falling head: unidirectional flow under a falling head (apparatus capable of at least 250 mm head).
Specimens
- Samples handled flat, not folded; cut per ISO 9862.
- Typical test set uses five specimens of suitable dimension for the apparatus.
Apparatus and measurement
- Apparatus must allow visual observation of bubbles and have a minimum exposed diameter (≥ 50 mm) with internal diameter accuracy to 0.1 mm.
- Support grid may be used to avoid deformation; head loss of apparatus alone (with grid) must be

Related standards

Mentioned in the description and other ISO standards

Overview

Key topics and technical requirements

Test methods
- Constant head: steady unidirectional flow with several constant heads (including a maximum head ≈ 70 mm).
- Falling head: unidirectional flow under a falling head (apparatus capable of at least 250 mm head).
Specimens
- Samples handled flat, not folded; cut per ISO 9862.
- Typical test set uses five specimens of suitable dimension for the apparatus.
Apparatus and measurement
- Apparatus must allow visual observation of bubbles and have a minimum exposed diameter (≥ 50 mm) with internal diameter accuracy to 0.1 mm.
- Support grid may be used to avoid deformation; head loss of apparatus alone (with grid) must be

ISO 11058:2019 PDF

Technical details

Abstract

Overview

Key topics and technical requirements

Related standards

Abstract

Overview

Key topics and technical requirements

Related standards

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