ISO 9863:1990
(Main)Geotextiles — Determination of thickness at specified pressures
Geotextiles — Determination of thickness at specified pressures
Géotextiles — Détermination de l'épaisseur à des pressions prescrites
General Information
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Standards Content (Sample)
INTERNATIONAL
STANDARD
First edition
1990-10-01
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Geotextiles - Determination of thickness at
specified pressures
D&termination de Mpaisseur ZI des pressions prescrifes
G@ofexfiles -
Reference number
IS0 9863: 1990(E)
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IS0 9863:1990(E)
Foreword
IS0 (the International Organization for Standardization) is a worldwide
federation of national standards bodies (IS0 member bodies). The work
of preparing International Standards is normally carried out through IS0
technical committees. Each member body interested in a subject for
which a technical committee has been established has the right to be
International organizations, govern-
represented on that committee.
mental and non-governmental, in liaison with ISO, also take part in the
work. IS0 collaborates closely with the International Electrotechnical
Commission (IEC) on all matters of electrotechnical standardization.
Draft International Standards adopted by the technical committees are
circulated to the member bodies for voting. Publication as an Interna-
tional Standard requires approval by at least 75 % of the member bodies
casting a vote.
International Standard IS0 9863 was prepared by Technical Committee
ISO/TC 38, Texfiles.
0 IS0 1990
All rights reserved. No part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without
permission in writing from the publisher.
International Organization for Standardization
Case Postaie 56 l CH-1211 Get-t&e 20 * Switzerland
Printed in Switzerland
ii
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IS0 9863:1990(E)
INTERNATIONAL STANDARD
- Determination of thickness at specified
Geotextiles
pressures
3 Definitions
1 Scope
For the purposes of this International Standard, the
1.1 This International Standard specifies a method following definitions apply.
for the determination of the thickness of geotextiles
at specified pressures and defines the pressure at 3.1 thickness (of geotextiles): The distance be-
which the nominal thickness is determined. tween a reference plate on which the specimen
rests and the contacting face of a parallel presser-
The test results are intended for identification pur-
foot applying a given pressure to the specimen.
poses and for use in technical data sheets and/or
as part of other test methods, e.g. tests of hydraulic
3.2 nominal thickness (of geotextiles): The thick-
properties.
determined when a pressure of
ness
2 kPa + 0,Ol kPa is applied to the specimen.
-
1.2 The method is applicable to all geotextiles, but
not necessarily to all geotextile-related products
4 Principle
such as geogrids.
4.1 The thickness of a number of specimens of
NOTE 1 Normally the thickness of a geotextile is deter-
geotextiles is measured as the distance between the
mined by measuring one layer of the geotextile. In cases
reference plate on which the specimen rests and the
when two or more layers are used on top of each other in
contacting face of a parallel, circular presser-foot
a design, the test may be made in accordance with this
International Standard with the agreed number of layers exerting a given pressure on an area of defined size
instead of one. In such cases when testing structured within a larger area of geotextile.
geotextiles, consideration should be given to the rele-
vance of such findings.
42 The res ult of t he test is given as the ave rage
oi th e res uits obtain ed at eat h spec ified pressu re.
2 Normative references
5 Apparatus
The following standards contain provisions which,
through reference in this text, constitute provisions 5.1 Thickness tester, incorporating the following
elements:
of this International Standard. At the time of publi-
cation, the editions indicated were valid. All stan-
dards are subject to revision, and parties to
51.1 Removeable presser-foot, having a plane cir-
agreements based on this International Standard
cular surface of area 25 cm* for testing materials of
are encouraged to investigate the possibility of ap-
uniform thickness. For the determination of the
plying the most recent editions of the standards in-
overall thickness of materials of non-uniform thick-
dicated below. Members of IEC and IS0 maintain
ness or the thickness of parts of such materials, the
registers of currently valid International Standards.
size of the presser-foot shall be agreed between the
interested parties and the size shall be given in the
IS0 5541976, Standard atmospheres for conditioning
test report.
and/or testing - Specifications.
The presser-foot shall be capable of exerting pres-
sures of 2 kPa, 20 kPa and 200 kPa, within a toler-
IS0 98623990, Geotextiles - Sampling and prepara-
ance of 0,5 %, normal to the plane of the specimen.
tion of test specimens.
1
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IS0 9863:1990(E)
To assure that the presser-foot surface and the ref- pressures of 2 kPa, 20 kPa and 200 kPa to an accu-
racy of 0,5 %.
erence plate are parallel when determining the
overall thickness of geotextiles of non-uniform
NOTE 2 Other pressures may be used if agreed be-
thickness, the presser-foot shall be supported at at
tween
...
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