ISO 10318-1-2026 PDF

Full title and description

ISO 10318-1:2026 — Geosynthetics — Part 1: Vocabulary. This second edition provides a harmonized set of terms and definitions used for geosynthetic materials, their functions, properties and related product names used in international and European standards for geotechnical and civil engineering applications.

Abstract

This document defines standardized terminology for geosynthetics — covering functions, products (for example geomembranes, geosynthetic clay liners, geofoam and other geosynthetic products), properties and interface/seaming concepts — to ensure consistent use of terms across ISO and EN standards on geosynthetics. The 2026 edition incorporates technical revisions and additional terms compared with the 2015 edition and its 2018 amendment.

General information

• Status: Published (International Standard).
• Publication date: January 2026 (effective/published date: 9 January 2026 as listed in publication records).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 01.040.59 (Textile and leather technology — vocabularies); 59.080.70 (Geotextiles / Geosynthetics).
• Edition / version: Edition 2 (2026).
• Number of pages: 8 (ISO published text — edition 2).

Key bibliographic and lifecycle details (status, edition and ICS) are recorded on the ISO record for ISO 10318-1:2026.

Scope

Defines terms related to the functions, products and properties of geosynthetics and the vocabulary used in International Standards on geosynthetics. It is intended for use by standards writers, product suppliers, testing laboratories, designers and regulators to ensure consistent interpretation of terminology across standards and technical documents. The 2026 edition replaces ISO 10318-1:2015 and its 2018 amendment.

Key topics and requirements

• Authoritative, standardized definitions of geosynthetic product names and categories (e.g., geomembrane, geosynthetic clay liner, geomat, geospacer, geofoam).
• Definitions of functions and performance-related terms used in design and testing of geosynthetics.
• Incorporation of new or revised terms compared with the 2015 edition and 2018 amendment (examples: geomat, geospacer, geocuspate, geosynthetic cementitious composite, energy absorption/index terms).
• Harmonization with related EN adoptions and with ISO/TC 221 work to maintain cross-reference consistency across the ISO 10318 series.
• Normative effect: vocabulary only (no normative references) — used to align terminology in test standards and product specifications.

Typical use and users

Used by geotechnical and civil engineers, product manufacturers and suppliers, testing and certification laboratories, standards committees (ISO/TC 221 and CEN/TC 189), procurement specialists, educators and researchers. It is referenced in product specifications, test method standards, conformity assessments and regulatory documents to avoid ambiguity in terminology.

Related standards

Part of the ISO 10318 series on geosynthetics. Closely related documents include ISO 10318-2 (Symbols and pictograms) and other ISO/CEN standards on geosynthetic test methods and product specifications. ISO 10318-1:2026 replaces ISO 10318-1:2015 (and its 2018 amendment). National and European adoptions (EN ISO 10318-1:2026 / BS EN ISO 10318-1:2026, etc.) are published for use in regional standards systems.

Keywords

geosynthetics, geotextiles, geomembrane, geosynthetic clay liner, geomat, geospacer, geofoam, geosynthetic cementitious composite, vocabulary, terminology, ISO/TC 221, EN ISO 10318

FAQ

Q: What is this standard?

A: ISO 10318-1:2026 is the second edition of the ISO vocabulary standard for geosynthetics, providing agreed definitions for products, functions and properties used in geotechnical and civil engineering standards.

Q: What does it cover?

A: It covers terms and definitions for geosynthetic products and their functions/properties (for example geomembranes, geosynthetic clay liners, geomats, geospacers, energy absorption terms), intended to harmonize terminology across related ISO and EN standards.

Q: Who typically uses it?

A: Engineers, manufacturers, laboratories, standards bodies, procurement officers and educators who need consistent, authoritative terminology when writing specifications, test standards, technical reports and contracts.

Q: Is it current or superseded?

A: Current — ISO 10318-1:2026 is published (January 2026) and supersedes ISO 10318-1:2015 and ISO 10318-1:2015/Amd 1:2018. Users should refer to the 2026 edition for the latest defined terms.

Q: Is it part of a series?

A: Yes — it is Part 1 of the ISO 10318 series on geosynthetics. Other parts include ISO 10318-2 (Symbols and pictograms) and additional parts addressing symbols, test methods and related subjects; national and European adoptions of the series exist.

Q: What are the key keywords?

A: geosynthetics, vocabulary, terminology, geomembrane, geotextile, geosynthetic clay liner, geomat, geospacer, geofoam.