SIST EN ISO 10318-1:2026

Geosynthetics - Part 1: Vocabulary (ISO 10318-1:2026)

This document defines terms related to the functions, products, and properties in geosynthetics, and terms used in International Standards on geosynthetics.

Geokunststoffe- Teil1: Begriffe (ISO 10318-1:2026)

Dieses Dokument legt funktionsbezogene, produktbezogene und eigenschaftsbezogene Begriffe und Begriffe, die in Internationalen Normen zu Geokunststoffen verwendet werden, fest.

Géosynthétiques- Partie1: Termes et définitions (ISO 10318-1:2026)

Le présent document définit les termes relatifs aux fonctions, aux produits et aux propriétés des géosynthétiques, et les termes utilisés dans les normes internationales traitant des géosynthétiques.

Geosintetika - 1. del: Slovar (ISO 10318-1:2026)

Ta dokument opredeljuje izraze, povezane s funkcijami, proizvodi in lastnostmi na področju geosintetike, ter izraze, ki se uporabljajo v mednarodnih standardih za geosintetiko.

General Information

• Status: Published
• Public Enquiry End Date: 28-Oct-2024
• Publication Date: 08-Feb-2026
• ICS: 01.040.59 - Textile and leather technology (Vocabularies)
• ICS: 59.080.70 - Geotextiles
• Technical Committee: ITEK - Textile and textile products
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 04-Feb-2026
• Due Date: 11-Apr-2026
• Completion Date: 09-Feb-2026
• Ref Project: EN ISO 10318-1:2026 - Geosynthetics - Part 1: Vocabulary (ISO 10318-1:2026)

Relations

• Referred By: SIST EN 17738:2023 - Geotextiles and Geotextile related products - Damage during installation procedure - Full scale test
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 13253:2014+A1:2015 - Geotextiles and geotextile-related products - Characteristics required for use in erosion control works (coastal protection, bank revetments)
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 13250:2014+A1:2015 - Geotextiles and geotextile-related products - Characteristics required for use in the construction of railways
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 13362:2005 - Geosynthetic Barriers - Characteristics required for use in the construction of canals
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 13249:2016 - Geotextiles and geotextile-related products - Characteristics required for use in the construction of roads and other trafficked areas (excluding railways and asphalt inclusion)
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 13257:2014 - Geotextiles and geotextile-related products - Characteristics required for use in solid waste disposals
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 13252:2014 - Geotextiles and geotextile-related products - Characteristics required for use in drainage systems
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 13250:2014 - Geotextiles and geotextile-related products - Characteristics required for use in the construction of railways
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 13256:2016 - Geotextiles and geotextile-related products - Characteristics required for use in the construction of tunnels and underground structures
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 13254:2016 - Geotextiles and geotextile-related products - Characteristics required for the use in the construction of reservoirs and dams
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 13254:2014 - Geotextiles and geotextile-related products - Characteristics required for the use in the construction of reservoirs and dams
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 13253:2014 - Geotextiles and geotextile-related products - Characteristics required for use in erosion control works (coastal protection, bank revetments)
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 13255:2016 - Geotextiles and geotextile-related products - Characteristics required for use in the construction of canals
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 14196:2016 - Geosynthetics - Test methods for measuring mass per unit area of clay geosynthetic barriers
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 13252:2016 - Geotextiles and geotextile-related products - Characteristics required for use in drainage systems
• Effective Date: 28-Jan-2026

Overview

SIST EN ISO 10318-1:2026, Geosynthetics - Part 1: Vocabulary is an essential international standard published by the European Committee for Standardization (CEN) in collaboration with ISO. This standard builds a unified dictionary of terms related to geosynthetics, encompassing their functions, products, and properties. Clear and consistent terminology underpins the safe, reliable use and specification of geosynthetics in civil engineering, infrastructure, environmental protection, and geotechnical applications.

The vocabulary standard supersedes previous editions and amendments, aligning terminology throughout the international community and supporting harmonized practices across industry sectors.

Key Topics

SIST EN ISO 10318-1:2026 systematically defines:

• Functions of geosynthetics: Including drainage, filtration, protection, reinforcement, separation, surface erosion control, barrier, stress relief, and stabilization.
• Products in geosynthetics: Such as geotextiles (nonwoven, woven, knitted), geogrids, geocells, geospacers (geonet, geomat, geocuspate), geosynthetic clay liners, geomembranes, geocomposites, and geofoam.
• Properties associated with geosynthetics: Covering physical (thickness, mass per unit area), hydraulic (permeability, transmissivity), mechanical (tensile strength, modulus, strain), as well as interface and seaming properties.

The document clarifies commonly used abbreviations (e.g., GTX for geotextile, GGR for geogrid) and measurement units, providing definitions for concepts critical in design, specification, and testing.

Applications

A shared geosynthetics vocabulary streamlines:

• Specification and Procurement: Ensuring accurate communication between suppliers, contractors, and engineers during procurement and project execution.
• Product Testing and Certification: Facilitating reliable product characterization, comparison, and certification processes based on unambiguous terminology.
• Design and Construction: Supporting robust geotechnical design and installation of structures like roads, embankments, landfills, tunnels, erosion controls, drainage layers, and containment barriers.
• Standard Compliance: Enabling consistent application of international standards and directives within infrastructure and environmental projects across borders.
• Education and Training: Providing a foundational reference for technical education, professional development, and industry communication.

The vocabulary supports the integrated use of diverse geosynthetic products in complex civil and environmental engineering applications, where clarity and consistency of terms are critical for project quality and safety.

Related Standards

SIST EN ISO 10318-1:2026 forms the foundation for terminology used across the geosynthetics standardization landscape. Key related standards include:

• ISO 10318-2: Extends the vocabulary to additional geosynthetics domains and applications.
• EN ISO 9863–1/2: Testing methods for determination of thickness and mass per unit area.
• EN ISO 13426: Testing and characterization of mechanical properties.
• EN ISO 12956: Measuring geotextile characteristics such as pore size.
• EN ISO 10722: Index test for mechanical damage under repeated loading.
• Other CEN and ISO standards covering durability, design, application-specific requirements, and construction practices for geosynthetics.

By adhering to SIST EN ISO 10318-1:2026, professionals ensure terminology consistency and compliance throughout geosynthetics selection, design, and project implementation, supporting quality, transparency, and international collaboration in the sector.

Standards Content (Sample)

SLOVENSKI STANDARD
01-marec-2026
Geosintetika - 1. del: Slovar (ISO 10318-1:2026)
Geosynthetics - Part 1: Vocabulary (ISO 10318-1:2026)
Geokunststoffe- Teil1: Begriffe (ISO 10318-1:2026)
���������tiques- Partie1: Termes et ��finitions (ISO 10318-1:2026)
Ta slovenski standard je istoveten z: EN ISO 10318-1:2026
ICS:
01.040.59 Tekstilna in usnjarska Textile and leather
tehnologija (Slovarji) technology (Vocabularies)
59.080.70 Geotekstilije Geotextiles
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 10318-1
EUROPEAN STANDARD
NORME EUROPÉENNE
January 2026
EUROPÄISCHE NORM
ICS 01.040.59; 59.080.70 Supersedes EN ISO 10318-1:2015, EN ISO 10318-
1:2015/A1:2018
English Version
Geosynthetics - Part 1: Vocabulary (ISO 10318-1:2026)
G?synth?iques - Partie 1: Vocabulaire (ISO 10318- Geokunststoffe - Teil 1: Begriffe (ISO 10318-1:2026)
1:2026)
This European Standard was approved by CEN on 27 December 2025.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2026 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 10318-1:2026 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 10318-1:2026) has been prepared by Technical Committee ISO/TC 221
"Geosynthetics" in collaboration with Technical Committee CEN/TC 189 “Geosynthetics” the secretariat
of which is held by NBN.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by July 2026, and conflicting national standards shall be
withdrawn at the latest by July 2026.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 10318-1:2015.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the
United Kingdom.
Endorsement notice
The text of ISO 10318-1:2026 has been approved by CEN as EN ISO 10318-1:2026 without any
modification.
International
Standard
ISO 10318-1
Second edition
Geosynthetics —
2026-01
Part 1:
Vocabulary
Géosynthétiques —
Partie 1: Vocabulaire
Reference number
ISO 10318-1:2026(en) © ISO 2026

ISO 10318-1:2026(en)
© ISO 2026
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii
ISO 10318-1:2026(en)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
3.1 Terms related to functions . .1
3.2 Terms related to products .2
3.3 Terms related to properties .4
3.3.1 General properties .4
3.3.2 Terms related to physical properties .5
3.3.3 Terms related to hydraulic properties .5
3.3.4 Terms related to mechanical properties .6
3.3.5 Terms related to the seaming or attaching of geotextile (GTX) or geotextile-
related product (GTP) .7
3.3.6 Terms related to interface properties .8
3.4 Other terms .8
Index . 9

iii
ISO 10318-1:2026(en)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out through
ISO technical committees. Each member body interested in a subject for which a technical committee
has been established has the right to be represented on that committee. International organizations,
governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely
with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are described
in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types
of ISO document should be noted. This document was drafted in accordance with the editorial rules of the
ISO/IEC Directives, Part 2 (see www.iso.org/directives).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent
rights in respect thereof. As of the date of publication of this document, ISO had not received notice of (a)
patent(s) which may be required to implement this document. However, implementers are cautioned that
this may not represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and expressions
related to conformity assessment, as well as information about ISO's adherence to the World Trade
Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 221, Geosynthetics, in collaboration with
the European Committee for Standardization (CEN) Technical Committee CEN/TC 189, Geosynthetics, in
accordance with the Agreement on technical cooperation between ISO and CEN (Vienna Agreement).
This second edition cancels and replaces the first edition (ISO 10318-1:2015), which has been technically
revised. It also incorporates the Amendment ISO 10318-1:2015/Amd 1:2018.
The main changes are as follows:
— modification of definitions for reinforcement (3.1.4) and stress relief (3.1.8);
— addition of the following new terms defining products: geomat (3.2.6.2), geospacer (3.2.6), geocuspate
(3.2.6.1), geomembrane (3.2.8.2), geosynthetic clay liner (3.2.8.3.1), bituminous geomembrane (3.2.8.4.1),
geosynthetic cementitious composite (3.2.11), and geofoam (3.2.12);
— addition of the following new definitions for properties: energy absorption (3.3.4.4) and energy
absorption index (3.3.4.5).
A list of all parts in the ISO 10318 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.

iv
International Standard ISO 10318-1:2026(en)
Geosynthetics —
Part 1:
Vocabulary
1 Scope
This document defines terms related to the functions, products, and properties in geosynthetics, and terms
used in International Standards on geosynthetics.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1 Terms related to functions
3.1.1
drainage
collection and transporting of either precipitation, ground water, or other fluids, or all three, in the plane of
a geosynthetic material
3.1.2
filtration
restraining the uncontrolled passage of soil or other particles subjected to hydrodynamic forces, while
allowing the passage of fluids into or across a geosynthetic material
3.1.3
protection
preventing or limiting local damage to a given element or material by the use of a geosynthetic material
3.1.4
reinforcement
use of the tensile stress-strain behaviour of a geosynthetic to improve the mechanical performance of a
system or structure made of soil or other construction materials
3.1.5
separation
prevention from intermixing of adjacent dissimilar soils or fill materials by the use of a geosynthetic material
3.1.6
surface erosion control
use of geosynthetic materials to prevent or limit soil or other particle movements at the surface
Note 1 to entry: For example, a slope.

ISO 10318-1:2026(en)
3.1.7
barrier
ability of a geosynthetic to prevent or reduce flow, or mass transfer, or both
Note 1 to entry: The function is usually defined by single or multiple engineering or regulatory thresholds.
3.1.8
stress relief
function provided by an adequately bitumen-saturated interlayer which allows for
slight differential movements between the two layers and thus relieves stress to delay or prevent reflective
cracking
Note 1 to entry: An adequate
...