oSIST prEN 17738:2021

Geotextiles and Geotextile related products - Damage during installation procedure - Full scale test

Testing with site specific soil, equipment and conditions

Geotextilien und geotextilverwandte Produkte - Beschädigung während des Einbaus - Vollständige Prüfung

Dieses Dokument beschreibt ein Verfahren zur Erzeugung einer mechanischen Beschädigung an Geotextilien und geotextilverwandten Produkten ausschließlich durch Verdichtung der standortspezifischen Materialien. Die Beschädigung wird durch Sichtprüfung und anhand des Verlustes der Zugfestigkeit bewertet. Es können weitere Referenzprüfungen angewendet werden, um die durch dieses Verfahren hervorgerufene Beschädigung zu bewerten.
Bei dem beschriebenen Verfahren handelt es sich um ein maßstäbliches Prüfverfahren, bei dem eine Reihe an von den Beteiligten vereinbarten Schüttungen und Verdichtungsverfahren angewendet wird; es darf zur Ableitung eines Abminderungsfaktors für die Beschädigung durch Einbau für Bewehrungen aus Geotextilien und geotextilverwandten Produkten angewendet werden. Dieses Verfahren ist nicht auf Asphalttragschichten und Asphalteinlage anwendbar.

Geotekstilije in geotekstilijam sorodni izdelki - Poškodbe med postopkom namestitve - Celovit preskus

General Information

• Status: Not Published
• Public Enquiry End Date: 31-Oct-2021
• ICS: 59.080.70 - Geotextiles
• Technical Committee: ITEK - Textile and textile products
• Current Stage: 4020 - Public enquire (PE) (Adopted Project)
• Start Date: 25-Aug-2021
• Due Date: 12-Jan-2022
• Ref Project: prEN 17738 - Geotextiles and Geotextile related products - Damage during installation procedure - Full scale test

Standards Content (sample)

SLOVENSKI STANDARD
oSIST prEN 17738:2021
01-oktober-2021
Geotekstilije in geotekstilijam sorodni izdelki - Poškodbe med postopkom
namestitve - Celovit preskus

Geotextiles and Geotextile related products - Damage during installation procedure - Full

scale test

Geotextilien und geotextilverwandte Produkte - Beschädigung während des Einbaus -

Vollständige Prüfung
Ta slovenski standard je istoveten z: prEN 17738
ICS:
59.080.70 Geotekstilije Geotextiles
oSIST prEN 17738:2021 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN 17738:2021
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oSIST prEN 17738:2021
DRAFT
EUROPEAN STANDARD
prEN 17738
NORME EUROPÉENNE
EUROPÄISCHE NORM
September 2021
ICS 59.080.70
English Version
Geotextiles and Geotextile related products - Damage
during installation procedure - Full scale test
Geotextilien und geotextilverwandte Produkte -
Beschädigung während des Einbaus - Vollständige
Prüfung

This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee

CEN/TC 189.

If this draft becomes a European Standard, 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.

This draft European Standard was established by CEN 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, Turkey and

United Kingdom.

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.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without

notice and shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 17738:2021 E

worldwide for CEN national Members.
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oSIST prEN 17738:2021
prEN17738:2021 (E)
Contents Page

European foreword ............................................................................................................................................ 3

Introduction .......................................................................................................................................................... 4

1 Scope .......................................................................................................................................................... 5

2 Normative references .......................................................................................................................... 5

3 Terms and definitions ......................................................................................................................... 5

4 Principle ................................................................................................................................................... 5

4.1 General...................................................................................................................................................... 5

4.2 Sampling ................................................................................................................................................... 6

4.3 Number and dimensions of test specimens ................................................................................. 6

4.4 Control Sample ....................................................................................................................................... 6

5 Conditioning ........................................................................................................................................... 7

6 Test site .................................................................................................................................................... 7

6.1 General...................................................................................................................................................... 7

6.2 Arrangement of the specimens ........................................................................................................ 7

6.3 Fill materials ........................................................................................................................................... 7

6.4 Compaction plant .................................................................................................................................. 8

7 Procedure ................................................................................................................................................ 8

7.1 General...................................................................................................................................................... 8

7.2 Site testing ............................................................................................................................................... 9

7.3 Recovery of the reinforcement ........................................................................................................ 9

7.4 Visual assessment of site damage ................................................................................................. 10

7.5 Measurement of damage .................................................................................................................. 10

8 Calculations ........................................................................................................................................... 10

9 Test report ............................................................................................................................................. 11

Annex A (informative) Calculation of reduction factor for installation damage ...................... 13

Bibliography ....................................................................................................................................................... 14

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oSIST prEN 17738:2021
prEN17738:2021 (E)
European foreword

This document (prEN 17738:2021) has been prepared by Technical Committee CEN/TC 189

“Geotextiles”, the secretariat of which is held by NBN.
This document is currently submitted to the CEN Enquiry.

This document has been prepared under a Standardization Request given to CEN by the European

Commission and the European Free Trade Association.
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oSIST prEN 17738:2021
prEN17738:2021 (E)
Introduction

The document describes the procedure to evaluate the damaging during the installation of a geotextile

and geotextile-related product with site specific soil, equipment and conditions. The test could be used

also to evaluate the RFid of the geotextile and geotextile-related product, this parameter is fundamental

in the design stage and is strictly related to the site specific soil, equipment and conditions.

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oSIST prEN 17738:2021
prEN17738:2021 (E)
1 Scope

This document describes a procedure for producing mechanical damage to geotextiles and geotextile-

related products, due only to compaction of site specific materials. The damage is assessed visually and

by the loss of tensile strength. Other reference tests can be used to assess the damage caused by this

procedure.

The method described is a full-scale test procedure, using a range of fills and compaction methods as

agreed upon by Parties, and may be used for the derivation of a reduction factor for installation damage

for geotextile and geotextile-related product reinforcement. This procedure is not applicable for use in

pavements and asphalt overlays.
2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. For dated references, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any amendments) applies.

EN ISO 9862, Geosynthetics - Sampling and preparation of test specimens (ISO 9862)

EN ISO 10319, Geosynthetics - Wide-width tensile test (ISO 10319)
EN ISO 10318-1, Geosynthetics - Part 1: Terms and definitions (ISO 10318-1)
3 Terms and definitions

For the purposes of this document, the terms defined in EN ISO 10318-1 and the following terms and

definitions apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

• IEC Electropedia: available at https://www.electropedia.org/
• ISO Online browsing platform: available at https://www.iso.org/obp
3.1
reference test

test used to determine a particular property of the geotextile and geotextile-related product being

damaged in this procedure
3.2
reference grading parameter

specific diameter in the particle size distribution used to characterize each type of fill used in the

procedure (e.g. d of the soil)
4 Principle
4.1 General

A full scale geotextile and geotextile-related product specimen is placed under a range of fills that

conform to the agreed upon grading limits; the fills are compacted in accordance with and in excess of

the agreed upon specification.

The specimens are large enough to be used for wide-width tensile testing (ISO 10319) or the test used to

measure the reference property.
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The geotextile and geotextile-related product specimen is then removed from the test apparatus,

examined for any visual damage and subjected to a mechanical test, to measure the change in mechanical

properties. The result is expressed as the change (in percent) of the reference property. The visual

damage is also reported.
4.2 Sampling

The test specimens from the samples shall be taken in accordance with EN ISO 9862.

4.3 Number and dimensions of test specimens

The amount of geotextile and geotextile-related product to install in and retrieve from a test section is a

function of the type and number of laboratory tests to be conducted for assessment of damage. An amount

of material sufficient to obtain enough tests on representative specimens, for each type of test, should be

installed for each set of installation conditions.

In the recommended installation, geotextiles and geotextile-related products shall be cut to cover the

nine test bays in Figure 1. If the width of the product is lower than the width of each test bay in Figure 1,

adjacent strips shall be placed, without overlapping.

The test sample should be marked prior to installation and exhumation, or a template made, showing the

exact location where specimens for testing are to be obtained. They shall also be labelled with sufficient

information to ensure identification of the exposed sample and associated exposure conditions, such as:

geotextile and geotextile-related product and fill type. Machine and transverse machine direction of

specimens shall be designated. Designation of specimen locations is recommended to eliminate potential

bias in specimen selection after the geotextile and geotextile-related product has been damaged.

Alternate areas may also be designated in the event the primary specimen area is damaged by

exhumation.

From the exhumed damaged specimens, cut the specimens for the reference test in machine direction

(MD), in staggered positions across and along the damaged specimen.

Specimens prepared for tensile test shall be cut as required in EN ISO 10319. When other reference tests

are used, the number and dimensions of specimens shall suit the specific reference test procedure.

4.4 Control Sample

Control or base line (un-installed) sample(s) of the geotextile(s) and geotextile-related product(s) being

investigated shall be from the same roll of material that is to be installed in the test section. Sample(s)

from each roll of geotextile and geotextile-related product shall be gathered in cases where multiple

geotextile and geotextile-related product rolls are used in the test section. Document all control sample

information pertinent to sample such as: date of manufacture, manufacturer or supplier, geotextile and

geotextile-related product grade and type, machine and transverse machine directions, and roll and lot

number, if available. These control samples shall be handled and stored in such a manner to eliminate, or

minimize, damage or degradation (for example, without exposure to ultraviolet light).

The orientation of the exhumed sample(s) and control sample(s) are to be documented. That is, the left

and right hand sides of each sample shall correspond. It is also recommended that the control sample

should be a direct continuation of the exhumed sample so as to minimize differences in control and

exhumed specimen properties due to inherent product variability.

The positions of the test specimens on the control sample, relative to roll edge, should correspond with

the positions of the exhumed sample.
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5 Conditioning

Keep samples in a dry ambient without exposing to sunlight, at the same temperature of the testing

environment, for 24 h.

Tests should be carried out at a temperature of (20 ± 2) °C. When this is not possible the temperature of

the test environment shall be measured and reported.
6 Test site
6.1 General

Geosynthetic and soil placement techniques shall model the methods anticipated during construction but

may also be designed to model hypothetical conditions such as various degrees of compaction, lift heights,

drop heights, equipment operations, and/or types of fill material.

In the recommended installation, a level site should be prepared and laid out in nine bays, typically each

having 3 m length × 3 m width as shown in Figure 1, leaving working space for construction plant to gain

access around the test area without crossing the bays.

Where the geotextile and geotextile-related product is planned to be used within a zone of compacted fill,

e.g. a reinforced soil retaining wall or fill slope, a 200 mm thick layer of material (or 1,5 times the

maximum fill size, whichever is the greater) should be placed and compacted in each bay prior to the

installation of t
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