Geosynthetics - Static puncture test (CBR test) (ISO/DIS 12236:2024)

ISO 12236:2006 specifies a method for the determination of the puncture resistance by measuring the force required to push a flat-ended plunger through geosynthetics.
The test is normally carried out on dry specimens conditioned in the specified atmosphere. The test is applicable to most types of products, but not to materials with apertures greater than 10 mm.

Geokunststoffe - Stempeldurchdrückversuch (CBR-Versuch) (ISO/DIS 12236:2024)

Géosynthétiques - Essai de poinçonnement statique (essai CBR) (ISO/DIS 12236:2024)

L'ISO 12236:2006 spécifie une méthode de détermination de la résistance au poinçonnement des géotextiles et produits apparentés par mesurage de la force requise pour enfoncer un poinçon plat au travers du géotextile.
L'essai est normalement réalisé sur des éprouvettes sèches conditionnées dans l'atmosphère spécifiée.
L'essai s'applique à la plupart des produits mais n'est pas applicable aux matériaux présentant des ouvertures supérieures à 10 mm.

Geosintetike – Statični prebojni preskus z žigom (preskus CBR) (ISO/DIS 12236:2024)

General Information

Status
Not Published
Publication Date
17-Aug-2026
Current Stage
4599 - Dispatch of FV draft to CMC - Finalization for Vote
Start Date
15-Dec-2025
Completion Date
15-Dec-2025

Relations

Effective Date
22-Jan-2023

Overview

The prEN ISO 12236:2024 standard, titled Geosynthetics - Static puncture test (CBR test), establishes a precise method for evaluating the puncture resistance of geosynthetic materials. This test measures the force required to push a flat-ended plunger through a geosynthetic specimen, providing critical data on material durability and strength. Primarily applied to geosynthetics with apertures smaller than 10 mm, this standardized method supports quality control and product development in geotechnical engineering and related industries.

Developed under the auspices of CEN and coordinated by ISO Technical Committee TC 221, this updated version supersedes the 1996 edition, reflecting technical refinements to ensure improved accuracy and reproducibility. The test focuses on dry specimens conditioned in a controlled atmosphere, enabling consistent and reliable assessment of geosynthetic resistance to static puncture forces.

Key Topics

  • Test Principle: A flat-ended stainless steel plunger (50 mm diameter) is advanced at a controlled, constant displacement rate (50 ± 5 mm/min) perpendicularly through the geosynthetic specimen clamped between steel rings.
  • Specimen Preparation: Five specimens are randomly sampled and conditioned according to ISO 554 standard atmosphere conditions (20 ± 2 °C, 65 ± 5% relative humidity) until weight stability.
  • Measurement Parameters:
    • Plunger force (F): Force applied during plunger displacement, measured in kilonewtons (kN).
    • Push-through force (Fp): Maximum force recorded just before piercing through the specimen.
    • Displacement (h): Distance the plunger travels after applying a preload of 0.02 kN, recorded in millimeters.
  • Equipment Requirements: The testing machine must meet ISO 7500-1 class 0 or 1 standards and provide force and displacement recording capabilities with autographic output.
  • Clamping System: Designed to prevent specimen slippage or bending, with steel rings measuring 150 mm internal diameter and suitable serration or corrugation zones within 7 mm of the gripping edge.
  • Data Reporting: Includes mean push-through force, coefficient of variation, and a force versus displacement graph. Observations of specimen behavior during testing, including any slippage or cutting near clamping points, are documented.

Applications

The prEN ISO 12236:2024 standard is essential for manufacturers, researchers, and quality assurance professionals working with geosynthetics such as geotextiles, geomembranes, and geogrids. It enables:

  • Accurate evaluation of static puncture resistance, ensuring materials meet structural and durability requirements for use in civil engineering projects.
  • Facilitating compliance with regulatory and project specifications where puncture resistance is critical, including landfill liners, roadways, erosion control systems, and drainage layers.
  • Optimization of geosynthetic design and material selection to enhance the safety and longevity of infrastructure.
  • Benchmark testing for product development and performance comparison among different geosynthetic materials.

Related Standards

  • ISO 554: Standard atmospheres for conditioning and testing.
  • ISO 7500-1: Calibration and verification of static uniaxial testing machines (force-measuring systems).
  • ISO 9862: Sampling and preparation of geosynthetic test specimens.
  • ISO 10320: Geosynthetics identification on site.

These complementary ISO standards support the implementation of ISO 12236 by providing uniform procedures for atmosphere control, equipment calibration, specimen preparation, and material identification.


By adhering to the prEN ISO 12236:2024 static puncture test, stakeholders ensure reliable evaluation of geosynthetic puncture resistance, promoting enhanced material performance and safer geotechnical applications worldwide.

Frequently Asked Questions

prEN ISO 12236 is a draft published by the European Committee for Standardization (CEN). Its full title is "Geosynthetics - Static puncture test (CBR test) (ISO/DIS 12236:2024)". This standard covers: ISO 12236:2006 specifies a method for the determination of the puncture resistance by measuring the force required to push a flat-ended plunger through geosynthetics. The test is normally carried out on dry specimens conditioned in the specified atmosphere. The test is applicable to most types of products, but not to materials with apertures greater than 10 mm.

ISO 12236:2006 specifies a method for the determination of the puncture resistance by measuring the force required to push a flat-ended plunger through geosynthetics. The test is normally carried out on dry specimens conditioned in the specified atmosphere. The test is applicable to most types of products, but not to materials with apertures greater than 10 mm.

prEN ISO 12236 is classified under the following ICS (International Classification for Standards) categories: 59.080.70 - Geotextiles. The ICS classification helps identify the subject area and facilitates finding related standards.

prEN ISO 12236 has the following relationships with other standards: It is inter standard links to EN ISO 12236:2006. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.

prEN ISO 12236 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.

Standards Content (Sample)


SLOVENSKI STANDARD
01-julij-2024
Geosintetike – Statični prebojni preskus z žigom (preskus CBR) (ISO/DIS
12236:2024)
Geosynthetics - Static puncture test (CBR test) (ISO/DIS 12236:2024)
Geokunststoffe - Stempeldurchdrückversuch (CBR-Versuch) (ISO/DIS 12236:2024)
Géosynthétiques - Essai de poinçonnement statique (essai CBR) (ISO/DIS 12236:2024)
Ta slovenski standard je istoveten z: prEN ISO 12236
ICS:
59.080.70 Geotekstilije Geotextiles
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
International
Standard
ISO/DIS 12236
ISO/TC 221
Geosynthetics — Static puncture
Secretariat: BSI
test (CBR test)
Voting begins on:
Géosynthétiques — Essai de poinçonnement statique (essai CBR)
2024-06-04
Voting terminates on:
ICS: 59.080.70
2024-08-27
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document is circulated as received from the committee secretariat.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
ISO/CEN PARALLEL PROCESSING
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
NATIONAL REGULATIONS.
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION.
Reference number
ISO/DIS 12236:2024(en)
DRAFT
ISO/DIS 12236:2024(en)
International
Standard
ISO/DIS 12236
ISO/TC 221
Geosynthetics — Static puncture
Secretariat: BSI
test (CBR test)
Voting begins on:
Géosynthétiques — Essai de poinçonnement statique (essai CBR)
ICS: 59.080.70 Voting terminates on:
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document is circulated as received from the committee secretariat.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
© ISO 2024
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
STANDARDS MAY ON OCCASION HAVE TO
ISO/CEN PARALLEL PROCESSING
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
BE CONSIDERED IN THE LIGHT OF THEIR
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
or ISO’s member body in the country of the requester.
NATIONAL REGULATIONS.
ISO copyright office
RECIPIENTS OF THIS DRAFT ARE INVITED
CP 401 • Ch. de Blandonnet 8
TO SUBMIT, WITH THEIR COMMENTS,
CH-1214 Vernier, Geneva
NOTIFICATION OF ANY RELEVANT PATENT
Phone: +41 22 749 01 11
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION.
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland Reference number
ISO/DIS 12236:2024(en)
ii
ISO/DIS 12236:2024(en)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 2
5 Apparatus . 2
6 Specimens. 4
7 Conditioning . 4
8 Procedure . 5
9 Recording, calculation and expression of results . 5
9.1 Recording of data .5
9.2 Calculation and expression of results .5
10 Test report . 6

iii
ISO/DIS 12236:2024(en)
Foreword
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