EN ISO 12571:2021

Hygrothermal performance of building materials and products - Determination of hygroscopic sorption properties (ISO 12571:2021)

This document specifies two alternative methods for determining hygroscopic sorption properties of porous building materials and products:
a) using desiccators and weighing cups (desiccator method);
b) using a climatic chamber (climatic chamber method).
The desiccator method is the reference method.
This document does not specify the method for sampling.
The methods specified in this document can be used to determine the moisture content of a sample in equilibrium with air at a specific temperature and humidity.

Wärme- und feuchtetechnisches Verhalten von Baustoffen und Bauprodukten - Bestimmung der hygroskopischen Sorptionseigenschaften (ISO 12571:2021)

Dieses Dokument legt zwei alternative Verfahren zur Bestimmung der hygroskopischen Sorptions-eigenschaften von porösen Baustoffen und  produkten fest:
a)   Verfahren unter Verwendung von Exsikkatoren und Wiegebehältern (Exsikkator Verfahren);
b)   Verfahren unter Verwendung einer Klimakammer (Klimakammer Verfahren).
Das Exsikkator Verfahren ist das Referenzverfahren.
Diese Internationale Norm legt kein Verfahren für die Probenentnahme fest.
Die in dieser Internationalen Norm festgelegten Verfahren können angewendet werden, um den Feuchte-gehalt einer Probe im Gleichgewichtszustand mit Luft von einer bestimmten Temperatur und Feuchte zu bestimmen.

Performance hygrothermique des matériaux et produits pour le bâtiment - Détermination des propriétés de sorption hygroscopique (ISO 12571:2021)

Le présent document décrit deux méthodes de détermination des propriétés de sorption hygroscopique des matériaux et produits poreux utilisés dans le bâtiment:
la méthode utilisant des dessiccateurs et des coupelles de pesée (méthode du dessiccateur);
la méthode utilisant une chambre climatique (méthode de la chambre climatique).
La méthode du dessiccateur est la méthode de référence.
Le présent document ne spécifie pas la méthode d’échantillonnage.
Les méthodes décrites dans le présent document peuvent être utilisées pour déterminer la teneur en eau d’un échantillon en équilibre avec de l’air à température et humidité données.

Higrotermalno obnašanje gradbenih materialov in proizvodov - Ugotavljanje higroskopnosti (ISO 12571:2021)

Ta dokument določa dve alternativni metodi za določevanje higroskopnosti
poroznih gradbenih materialov in proizvodov:
a) z eksikatorji in tehtalnimi posodami (metoda eksikatorja);
b) s klimatsko komoro (metoda klimatske komore).
Metoda eksikatorja je referenčna metoda.
Ta dokument ne določa metode vzorčenja.
Metode iz tega dokumenta je mogoče uporabiti za določevanje vsebnosti vlage v vzorcu
v ravnovesju z zrakom pri določeni temperaturi in vlažnosti.

General Information

• Status: Published
• Publication Date: 23-Nov-2021
• Withdrawal Date: 30-May-2022
• ICS: 91.100.01 - Construction materials in general
• Technical Committee: CEN/TC 89 - Thermal performance of buildings and building components
• Drafting Committee: CEN/TC 89 - Thermal performance of buildings and building components
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 24-Nov-2021
• Completion Date: 24-Nov-2021
• Ref Project: SIST EN ISO 12571:2022 - Hygrothermal performance of building materials and products - Determination of hygroscopic sorption properties (ISO 12571:2021)

Relations

• Replaces: EN ISO 12571:2013 - Hygrothermal performance of building materials and products - Determination of hygroscopic sorption properties (ISO 12571:2013)
• Effective Date: 01-Dec-2021

Standards Content (Sample)

SLOVENSKI STANDARD
01-marec-2022
Nadomešča:
SIST EN ISO 12571:2013
Higrotermalno obnašanje gradbenih materialov in proizvodov - Ugotavljanje
higroskopnosti (ISO 12571:2021)
Hygrothermal performance of building materials and products - Determination of
hygroscopic sorption properties (ISO 12571:2021)
Wärme- und feuchtetechnisches Verhalten von Baustoffen und Bauprodukten -
Bestimmung der hygroskopischen Sorptionseigenschaften (ISO 12571:2021)
Performance hygrothermique des matériaux et produits pour le bâtiment - Détermination
des propriétés de sorption hygroscopique (ISO 12571:2021)
Ta slovenski standard je istoveten z: EN ISO 12571:2021
ICS:
91.100.01 Gradbeni materiali na Construction materials in
splošno general
91.120.30 Zaščita pred vlago Waterproofing
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 12571
EUROPEAN STANDARD
NORME EUROPÉENNE
November 2021
EUROPÄISCHE NORM
ICS 91.100.01 Supersedes EN ISO 12571:2013
English Version
Hygrothermal performance of building materials and
products - Determination of hygroscopic sorption
properties (ISO 12571:2021)
Performance hygrothermique des matériaux et Wärme- und feuchtetechnisches Verhalten von
produits pour le bâtiment - Détermination des Baustoffen und Bauprodukten - Bestimmung der
propriétés de sorption hygroscopique (ISO hygroskopischen Sorptionseigenschaften (ISO
12571:2021) 12571:2021)
This European Standard was approved by CEN on 25 October 2021.

This European Standard was corrected and reissued by the CEN-CENELEC Management Centre on 22 December 2021.

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, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATIO N

E U R OP ÄI SCHES KOMITEE FÜR NORMUN G

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. EN ISO 12571:2021 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 12571:2021) has been prepared by Technical Committee ISO/TC 163 "Thermal
performance and energy use in the built environment" in collaboration with Technical Committee
CEN/TC 89 “Thermal performance of buildings and building components” the secretariat of which is
held by SIS.
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 May 2022, and conflicting national standards shall be
withdrawn at the latest by May 2022.
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 12571:2013.
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, Turkey and the
United Kingdom.
Endorsement notice
The text of ISO 12571:2021 has been approved by CEN as EN ISO 12571:2021 without any modification.

INTERNATIONAL ISO
STANDARD 12571
Third edition
2021-11
Hygrothermal performance of
building materials and products —
Determination of hygroscopic sorption
properties
Performance hygrothermique des matériaux et produits pour le
bâtiment — Détermination des propriétés de sorption hygroscopique
Reference number
ISO 12571:2021(E)
ISO 12571:2021(E)
© ISO 2021
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 12571:2021(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions, symbols and units . 1
3.1 Terms and definitions . 1
3.2 Symbols and units . 2
4 Principle . 2
4.1 Sorption curve . 2
4.2 Desorption curve . 2
5 Apparatus . 3
5.1 Desiccator method . 3
5.2 Climatic chamber method . 3
6 Test specimens . 3
6.1 Specification of the test specimens . 3
6.2 Number of test specimens . 3
7 Procedure .3
7.1 Test conditions . 3
7.2 Desiccator method . 4
7.2.1 General . 4
7.2.2 Sorption curve . 4
7.2.3 Desorption curve . 5
7.3 Climatic chamber method . 6
7.3.1 Sorption curve . 6
7.3.2 Desorption curve . 7
8 Calculation and expression of results . 7
8.1 Hygroscopic sorption . 7
8.2 Equilibrium moisture content curves . 7
9 Accuracy of measurement.8
9.1 Error in moisture content . . 8
9.2 Control of environmental conditions . 8
9.2.1 Desiccator method . 8
9.2.2 Climatic chamber method . 9
10 Test report . 9
Annex A (informative) Air relative humidities above saturated solutions in equilibrium .10
Annex B (informative) Preparation of saturated solutions .13
Annex C (informative) Example of the procedure for determining a point on a sorption
curve .16
Annex D (informative) Method using a glass jar .17
Bibliography .19
iii
ISO 12571:2021(E)
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 Internation
...