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1、 Reference number ISO 24353:2008(E) ISO 2008 INTERNATIONAL STANDARD ISO 24353 First edition 2008-09-15 Hygrothermal performance of building materials and products Determination of moisture adsorption/desorption properties in response to humidity variation Performance hygrothermique des matriaux et p
2、roduits pour le btiment Dtermination des proprits dadsorption/dsorption de lhumidit en rponse une fluctuation de lhumidit Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Boeing Co/5910770001 Not for Resale, 10/25/2008 04:57:49 MDTNo reproducti
3、on or networking permitted without license from IHS -,-,- ISO 24353:2008(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and
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6、nd, please inform the Central Secretariat at the address given below. COPYRIGHT PROTECTED DOCUMENT ISO 2008 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and mic
7、rofilm, without permission in writing from either ISO at the address below or ISOs member body in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO
8、2008 All rights reserved Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Boeing Co/5910770001 Not for Resale, 10/25/2008 04:57:49 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 24353:2008(E) ISO 2008 All rights r
9、eserved iii Contents Page Foreword iv Introduction v 1 Scope . 1 2 Normative references. 1 3 Terms, definitions and symbols 1 3.1 Terms and definitions. 1 3.2 Symbols and units 2 4 Test specimens. 3 4.1 General. 3 4.2 Size. 3 4.3 Thickness 3 4.4 Number of specimens 3 5 Test apparatus 3 6 Setting of
10、water vapour surface resistance. 4 7 Test method. 4 7.1 Test conditions . 4 7.2 Single cycle test of moisture adsorption/desorption content 5 7.3 Cyclic test of regular moisture adsorption/desorption content 6 8 Calculation. 7 8.1 Moisture adsorption/desorption content and the differences between th
11、em 7 8.2 Moisture adsorption/desorption rates 8 8.3 Fourth cycle moisture adsorption/desorption content. 8 9 Test report . 10 Annex A (normative) Setting of air flow on test specimen surface 11 Annex B (informative) Apparatus using salt saturated aqueous solution. 13 Annex C (informative) Calculatio
12、n procedure of moisture infiltration coefficient. 17 Bibliography. 18 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Boeing Co/5910770001 Not for Resale, 10/25/2008 04:57:49 MDTNo reproduction or networking permitted without license from IHS
13、-,-,- ISO 24353:2008(E) iv ISO 2008 All rights reserved 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
14、. 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 Intern
15、ational Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Sta
16、ndards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subj
17、ect of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 24353 was prepared by Technical Committee ISO/TC 163, Thermal performance and energy use in the built environment, Subcommittee SC 1, Test and measurement methods. Copyright International Organ
18、ization for Standardization Provided by IHS under license with ISO Licensee=Boeing Co/5910770001 Not for Resale, 10/25/2008 04:57:49 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 24353:2008(E) ISO 2008 All rights reserved v Introduction This International Standard des
19、cribes a test method that is applicable to materials used to inhibit fluctuation of indoor relative humidity. Testing of sorption/desorption efficiency permits the evaluation of materials for applications such as adjusting the relative humidity of museum storage and exhibition spaces. Materials sele
20、cted for their adsorption/desorption efficiency have recently come to be used in homes and medical care facilities in the interest of creating healthy and comfortable indoor environments. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Boeing
21、Co/5910770001 Not for Resale, 10/25/2008 04:57:49 MDTNo reproduction or networking permitted without license from IHS -,-,- Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Boeing Co/5910770001 Not for Resale, 10/25/2008 04:57:49 MDTNo reproduc
22、tion or networking permitted without license from IHS -,-,- INTERNATIONAL STANDARD ISO 24353:2008(E) ISO 2008 All rights reserved 1 Hygrothermal performance of building materials and products Determination of moisture adsorption/desorption properties in response to humidity variation 1 Scope This In
23、ternational Standard specifies a test method for determining moisture adsorption/desorption properties of building materials in response to humidity variation. This International Standard also defines the adsorption/desorption efficiency of building materials, measured as the change in mass of a spe
24、cimen moved from a given space to another one of different relative humidity and equal temperature. Moisture adsorption/desorption properties of materials are measured under conditions of a single cycle and several cycles. 2 Normative references The following referenced documents are indispensable f
25、or the application 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. ISO 12571:2000, Hygrothermal performance of building materials and products Determination of hygroscopi
26、c sorption properties ISO 12572:2001, Hygrothermal performance of building materials and products Determination of water vapour transmission properties 3 Terms, definitions and symbols 3.1 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1.1 moist
27、ure adsorption/desorption property property of a material related to its capacity for and efficiency in moisture adsorption/desorption 3.1.2 moisture adsorption process process by which moisture is adsorbed into a material from ambient air until equilibrium is reached 3.1.3 moisture desorption proce
28、ss process by which moisture is desorbed from a material into ambient air until equilibrium is reached 3.1.4 moisture adsorption content amount of moisture adsorbed into a specimen of a given material per unit of surface area of that material Copyright International Organization for Standardization
29、Provided by IHS under license with ISO Licensee=Boeing Co/5910770001 Not for Resale, 10/25/2008 04:57:49 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 24353:2008(E) 2 ISO 2008 All rights reserved 3.1.5 moisture desorption content amount of moisture desorbed by a speci
30、men of a given material per unit of surface area of that material 3.1.6 water vapour surface resistance resistance against the transfer of water vapour across the boundary layer between the ambient air and the surface of a building component such as a wall 3.1.7 resistance of water vapour transmissi
31、on resistance against the transfer of water vapour through a building component, such as wall, from one surface in contact with the water vapour in the air to the other 3.1.8 moisture adsorption rate rate of adsorbing moisture of the material from the ambient air 3.1.9 moisture desorption rate rate
32、of desorbing moisture of the material to the ambient air 3.2 Symbols and units Symbol Description Unit A Surface area of adsorption/desorption m2 Gn Adsorption/desorption rate at time n kg/(m2h) m0 Mass of the specimen after preconditioning kg ma Mass of the specimen at the time of completion of moi
33、sture adsorption process kg ma4 Mass of the specimen at the time of completion of moisture adsorption process of the 4th adsorption/desorption cycle kg md Mass of the specimen at the time of completion of moisture desorption process kg md3 Mass of the specimen at the time of completion of moisture d
34、esorption process of the 3rd adsorption/desorption cycle kg md4 Mass of the specimen at the time of completion of moisture desorption process of the 4th adsorption/desorption cycle kg mn Mass of specimen at time n kg mn1 Mass of specimen at time n1 kg R1 Resistance of water vapour on single-layered
35、specimen m2hPa/g R2 Resistance of water vapour on double-layered specimen m2hPa/g t Elapsed time h 1/ Water vapour surface resistance of specimen m2hPa/g A,a Change of moisture content at the time of completion of adsorption process kg/m2 A,ac Moisture adsorption content at the time of completion of
36、 moisture adsorption process of the 4th sorption/desorption cycle kg/m2 A,d Moisture desorption content at the time of completion of desorption process kg/m2 A,dc Moisture desorption content at the time of completion of moisture desorption process of the 4th adsorption/desorption cycle kg/m2 A,s Dif
37、ference between moisture adsorption/desorption content at the time of completion of the test kg/m2 A,sc Difference between moisture adsorption/desorption content at the time of completion of the 4th adsorption/desorption cycle kg/m2 Copyright International Organization for Standardization Provided b
38、y IHS under license with ISO Licensee=Boeing Co/5910770001 Not for Resale, 10/25/2008 04:57:49 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 24353:2008(E) ISO 2008 All rights reserved 3 4 Test specimens 4.1 General The specimen shall be representatives of the product.
39、 The size, the thickness and the number of specimens shall be as specified in 4.2 to 4.4, or otherwise selected ensuring that their moisture adsorption/desorption properties are properly evaluated. 4.2 Size The size of a specimen shall be at most 250 mm 250 mm but shall not be less than 100 mm 100 m
40、m. 4.3 Thickness The thickness of a specimen shall be the same as the thickness of the product. 4.4 Number of specimens The number of specimens shall be one piece for each test condition. 5 Test apparatus The test apparatus consists of an electronic balance, a moisture-proof box with a programmable
41、air conditioner and a thermometer, as shown in Figure 1. An apparatus of any structure may be used as long as the criteria of measurement precision described for the different pieces of equipment (5.1 to 5.4) are satisfied. 5.1 Electronic balance, capable of weighing to the nearest 0,01 g for test s
42、pecimens up to 6 kg. For test specimens exceeding 6 kg, an electronic balance capable of weighing to the nearest 0,1 g may be used. 5.2 Moisture-proof box with thermostat and/or hygrostat, equipped with a programmable air conditioner capable of being set at a specific temperature and humidity, havin
43、g sufficient capacity to accommodate the specimen and containing the elements listed in 5.2.1 to 5.2.4. 5.2.1 Temperature sensor, positioned about 50 mm from the centre of the adsorption/desorption surface of the specimen and enabling the temperature to be maintained throughout the moisture-proof bo
44、x to within 0,5 C. 5.2.2 Humidity gauge, of which the sensor of the hygrometer is positioned about 50 mm from the centre of the moisture adsorption/desorption surface of the specimen and enables the humidity to be maintained throughout the moisture-proof box to within 3 % at any position. 5.2.3 Humi
45、difier, using water vapour as the humidification source. Humidification methods that involve spraying water with an ultrasonic humidifier, or similar devices, shall not be employed. When humidity is changed stepwise, the desired humidity shall be reached quickly (as a rule, in less than 10 min). NOT
46、E Salt saturated solutions can be used to adjust the relative humidity as indicated in Annex B. 5.2.4 Windscreen, set up to prevent any influence from airflow of the air conditioner. 5.3 Thermometer, capable of measuring the temperature to within 0,1C. 5.4 Hygrometer, capable of measuring the humidi
47、ty to within 2 %. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Boeing Co/5910770001 Not for Resale, 10/25/2008 04:57:49 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 24353:2008(E) 4 ISO 2008 All rights reserv
48、ed Dimensions in millimetres Key 1 electronic balance 2 hygrometer 3 thermometer 4 specimen 5 moisture-proof box 6 rubber plug 7 windscreen 8 programmable air conditioner Figure 1 Typical test apparatus 6 Setting of water vapour surface resistance Air flow a along the surface of a specimen should be adjusted using a fan to stir the air inside the moisture-proof box (see Annex A) so as to o