DIN EN ISO 12571-2013 Hygrothermal performance of building materials and products - Determination of hygroscopic sorption properties (ISO 12571 2013) German version EN ISO 12571 20.pdf

1、December 2013Translation by DIN-Sprachendienst.English price group 12No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).IC

2、S 91.100.01!%*vG“2078336www.din.deDDIN EN ISO 12571Hygrothermal performance of building materials and products Determination of hygroscopic sorption properties (ISO 12571:2013);English version EN ISO 12571:2013,English translation of DIN EN ISO 12571:2013-12Wrme- und feuchtetechnisches Verhalten von

3、 Baustoffen und Bauprodukten Bestimmung der hygroskopischen Sorptionseigenschaften (ISO 12571:2013);Englische Fassung EN ISO 12571:2013,Englische bersetzung von DIN EN ISO 12571:2013-12Performance hygrothermique des matriaux et produits pour le btiment Dtermination des proprits de sorption hygroscop

4、ique (ISO 12571:2013);Version anglaise EN ISO 12571:2013,Traduction anglaise de DIN EN ISO 12571:2013-12SupersedesDIN EN ISO 12571:2000-04www.beuth.deIn case of doubt, the German-language original shall be considered authoritative.Document comprises 23 pages11.13 DIN EN ISO 12571:2013-12 2 A comma i

5、s used as the decimal marker. National foreword This document (EN ISO 12571:2013) 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 compo

6、nents” (Secretariat: SIS, Sweden). The responsible German body involved in its preparation was the Normenausschuss Bauwesen (Building and Civil Engineering Standards Committee), Working Committee NA 005-56-99 AA Feuchte. Amendments This standard differs from DIN EN ISO 12571:2000-04 as follows: a) a

7、 new term has been added: “3.1.1 equilibrium moisture content”; b) the former term “3.1.6 adsorption curve” has been changed to “3.1.5 sorption curve”; c) Subclause 7.1 “Test conditions” has been supplemented to include tropical countries; d) Subclause 7.2 “Desiccator method” now includes standard a

8、ir relative humidities; e) Clause 8 “Calculation and expression of results” has been rendered more precise and supplemented by the inclusion of equilibrium moisture content curves in the hygroscopic sorption; f) in Table A.1, the value 27 C has been added; g) Annex D “Method using a glass jar” has b

9、een added. Previous editions DIN 52620: 1991-04 DIN EN ISO 12571: 2000-04 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 12571 August 2013 ICS 91.100.01 Supersedes EN ISO 12571:2000English Version Hygrothermal performance of building materials and products - Determination of hygroscopic so

10、rption properties (ISO 12571:2013) Performance hygrothermique des matriaux et produits pour le btiment - Dtermination des proprits de sorption hygroscopique (ISO 12571:2013) Wrme- und feuchtetechnisches Verhalten von Baustoffen und Bauprodukten - Bestimmung der hygroskopischen Sorptionseigenschaften

11、 (ISO 12571:2013) This European Standard was approved by CEN on 26 July 2013. 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 bibl

12、iographical 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 respon

13、sibility 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, Former Yugoslav Repu

14、blic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMA

15、LISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2013 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 12571:2013: EContents Page Foreword . 3 1 Scope . 4 2 Normative refer

16、ences. 4 3 Terms and definitions, symbols and units 4 3.1 Terms and definitions 4 3.2 Symbols and units . 5 4 Principle 5 4.1 Sorption curve 5 4.2 Desorption curve 5 5 Apparatus 6 5.1 Desiccator method . 6 5.2 Climatic chamber method . 6 6 Test specimens 6 6.1 Specification of the test specimens . 6

17、 6.2 Number of test specimens 6 7 Procedure 6 7.1 Test conditions . 6 7.2 Desiccator method . 7 7.3 Climatic chamber method . 8 8 Calculation and expression of results . 9 8.1 Hygroscopic sorption 9 8.2 Equilibrium moisture content curves. 9 9 Accuracy of measurement 10 9.1 Error in moisture content

18、 10 9.2 Control of environmental conditions . 10 10 Test report . 11 Annex A (informative) Air relative humidities above saturated solutions in equilibrium 12 Annex B (informative) Preparation of saturated solutions 15 Annex C (informative) Example of the procedure for determining a point on a sorpt

19、ion curve . 18 Annex D (informative) Method using a glass jar . 19 Bibliography 21 2DIN EN ISO 12571:2013-12EN ISO 12571:2013 (E)This document (EN ISO 12571:2013) has been prepared by Technical Committee ISO/TC 163 Thermal performance and energy use in the built environment in collaboration with Tec

20、hnical 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 February 2014, and co

21、nflicting national standards shall be withdrawn at the latest by February 2014. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This d

22、ocument supersedes EN ISO 12571:2000. 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, Former Yugos

23、lav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 12571:2013 has

24、 been approved by CEN as EN ISO 12571:2013 without any modification. Foreword“”3DIN EN ISO 12571:2013-12EN ISO 12571:2013 (E)1 ScopeThis International Standard specifies two alternative methods for determining hygroscopic sorption properties of porous building materials and products:a) using desicca

25、tors and weighing cups (desiccator method);b) using a climatic chamber (climatic chamber method).The desiccator method is the reference method.This International Standard does not specify the method for sampling.The methods specified in this International Standard can be used to determine the moistu

26、re content of a sample in equilibrium with air at a specific temperature and humidity.2 Normative referencesThe following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of t

27、he referenced document (including any amendments) applies.ISO 9346, Hygrothermal performance of buildings and building materials Physical quantities for mass transfer VocabularyISO 12570, Hygrothermal performance of building materials and products Determination of moisture content by drying at eleva

28、ted temperature3 Terms and definitions, symbols and units3.1 Terms and definitionsFor the purposes of this document, the terms and definitions given in ISO 9346 and the following apply.3.1.1equilibrium moisture contentmoisture content of a porous material in equilibrium with the environment and the

29、relative humidity of the ambient air, at a specified temperature3.1.2moisture content mass by massmass of evaporable water divided by mass of dry material3.1.3moisture content volume by volumevolume of evaporable water divided by volume of dry material4DIN EN ISO 12571:2013-12EN ISO 12571:2013 (E)3.

30、1.4moisture content mass by volumemass of evaporable water divided by volume of dry materialNote 1 to entry: The mass of water is determined by weighing the specimen before and after drying at the appropriate drying temperature until constant mass is reached.3.1.5sorption curvecurve established at a

31、 series of increasing equilibrium relative humidities at a given temperature3.1.6desorption curvecurve established at a series of decreasing equilibrium relative humidities at a given temperature3.2 Symbols and unitsSymbol Quantity Unitm mass of test specimen kgm0mass of dried test specimen kgu mois

32、ture content mass by mass kg/kg moisture content volume by volume m3/m3w moisture content mass by volume kg/m34 Principle4.1 Sorption curveThe specimen is dried to constant mass. While maintaining a constant temperature, the specimen is placed consecutively in a series of test environments, with rel

33、ative humidity increasing in stages. The moisture content is determined when equilibrium with each environment is reached. Equilibrium with the environment is established by weighing the specimen until constant mass is reached. A minimum of four test atmospheres shall be selected in the humidity ran

34、ge under consideration.After establishing the moisture content at each relative humidity the sorption curve can be drawn.4.2 Desorption curveThe starting point for desorption is a relative humidity of at least 95 %. This might be the last point of the sorption curve or might be reached by sorption f

35、rom a dried test specimen. While maintaining a constant temperature, the specimen is placed consecutively in a series of test environments, with relative humidity decreasing in stages. The moisture content is determined when equilibrium with each environment is reached. Equilibrium with the environm

36、ent is established by weighing the specimen until constant mass is reached. A minimum of four test atmospheres shall be selected in the humidity range under consideration. Finally, the specimen is dried to constant mass.After establishing the moisture content at each relative humidity the desorption

37、 curve can be drawn.NOTE A defined starting point for desorption has been chosen for better reproducibility.5DIN EN ISO 12571:2013-12EN ISO 12571:2013 (E)5 Apparatus5.1 Desiccator methodThe test apparatus shall include:a) weighing cups which do not absorb water and with tight-fitting lids;b) balance

38、 capable of weighing to an accuracy of 0,01 % of the mass of the test specimen;NOTE If larger weighing cups are used, the weighing accuracy can be determined with respect to the total mass and the required accuracy of the test results.c) drying oven, in accordance with ISO 12570;d) desiccator, capa

39、ble of maintaining the relative humidity within 2 % relative humidity;e) constant-temperature chamber, capable of maintaining the specified test temperature to an accuracy of 0,5 K.5.2 Climatic chamber methodThe test apparatus shall include:a) weighing cups which do not absorb water;b) balance, capa

40、ble of weighing to an accuracy of 0,01 % of the mass of the test specimen;NOTE If larger weighing cups are used, the weighing accuracy can be determined with respect to the total mass and the required accuracy of the test results.c) drying oven, in accordance with ISO 12570;d) climatic chamber, capa

41、ble of maintaining the relative humidity within 5 % relative humidity and the temperature within 2 K over the whole test area.6 Test specimens6.1 Specification of the test specimensA test specimen shall be representative of the product and have a mass of at least 10 g. Specimens of materials with a

42、dry density less than 300 kg/m3shall have an area of at least 100 mm 100 mm. If it can be demonstrated from other references that the result will not be affected, a test specimen can be cut or crushed into smaller pieces to reduce the time to reach equilibrium with the environment.6.2 Number of test

43、 specimensA minimum of three specimens shall be tested. The procedure in Clause 7 shall be applied to each specimen.7 Procedure7.1 Test conditionsReference sorption curves shall be established at a temperature of (23 0,5) C or (27 0,5) C in tropical countries. If agreed between the parties, sorption

44、 curves can be established at other temperatures for specific applications.6DIN EN ISO 12571:2013-12EN ISO 12571:2013 (E)7.2 Desiccator method7.2.1 GeneralMake up the appropriate saturated aqueous solution to achieve the necessary relative humidity in the desiccator.Standard air relative humidities

45、to be selected for measuring sorption curves are shown in Table 1. Choose 5 or more conditions that include No.2, No.4 and No.6 in Table 1.NOTE Annex A gives the air relative humidities of various saturated solutions in equilibrium, and Annex B describes the preparation of various solutions.Place th

46、e desiccator in the constant-temperature chamber (see Figure 1). The depth of saturated aqueous solution shall be 30 mm50 mm.Table 1 Standard air relative humidities above saturated solutions in equlibrium No. SubstanceRelative humidity(%)a1 KOH 9 82 MgCl26H2O 33 333 Mg(NO3)26H2O 53 524 NaCl 75 755

47、KCl 85 846 KNO393 93a Relative humidities in left column correspond to air temperature 23 C. Relative humidities in right column correspond to air temperature 27 C.7.2.2 Sorption curveWeigh the weighing cup and lid when empty and dry. Put the test specimen into the weighing cup without the lid and d

48、ry it until constant mass in the drying oven at the temperature specified in ISO 12570.Constant mass is reached if the change of mass between three consecutive weighings, each made at least 24 h apart, differs by less than 0,1 % of the total mass.Put the test specimen in the weighing cup, with the l

49、id beside it, into the desiccator containing the salt solution needed to give the appropriate relative humidity.Periodically weigh the specimen until it is in equilibrium with the environment (constant mass). Immediately after removing the lid of the desiccator, put on the lid of the weighing cup, and move the weighing cup to the balance. After weighing the cup, return it to the desiccator with the lid beside it.NOTE 1 Annex C gives an example of a