SIST EN 1062-6:2003

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Beschichtungsstoffe - Beschichtungsstoffe und Beschichtungssysteme für mineralische Untergründe und Beton im Außenbereich - Teil 6: Bestimmung der Kohlenstoffdioxid-Diffusionsstromdichte (Permeabilität)Peintures et vernis - Produits de peinture et systemes de revetement pour maçonnerie et béton extérieur - Partie 6: Détermination de la perméabilité au dioxyde de carbonePaints and varnishes - Coating materials and coating systems for exterior masonry and concrete - Part 6: Determination of carbon dioxide permeability87.040Barve in lakiPaints and varnishesICS:Ta slovenski standard je istoveten z:EN 1062-6:2002SIST EN 1062-6:2003en01-januar-2003SIST EN 1062-6:2003SLOVENSKI
STANDARD



SIST EN 1062-6:2003



EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 1062-6July 2002ICS 87.040English versionPaints and varnishes - Coating materials and coating systemsfor exterior masonry and concrete - Part 6: Determination ofcarbon dioxide permeabilityPeintures et vernis - Produits de peinture et systèmes derevêtement pour maçonnerie et béton extérieur - Partie 6:Détermination de la perméabilité au dioxyde de carboneBeschichtungsstoffe - Beschichtungsstoffe undBeschichtungssysteme für mineralische Untergründe undBeton im Außenbereich - Teil 6: Bestimmung derKohlenstoffdioxid-Diffusionsstromdichte (Permeabilität)This European Standard was approved by CEN on 26 March 2002.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the 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 translationunder the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2002 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 1062-6:2002 ESIST EN 1062-6:2003



EN 1062-6:2002 (E)ForewordThis document EN 1062-6:2002 has been prepared by Technical Committee CEN/TC 139 "Paints and varnishes",the secretariat of which is held by DIN.This European Standard shall be given the status of a national standard, either by publication of an identical text orby endorsement, at the latest by January 2003, and conflicting national standards shall be withdrawn at the latestby January 2003.This European Standard was prepared jointly by CEN/TC 139, Paints and varnishes (Secretariat: DIN DeutschesInstitut für Normung e. V.) and CEN/TC 104/SC 8, Protection and repairs of concrete structures (Secretariat: DINDeutsches Institut für Normung e. V.), after considerable preparatory work by CEN/TC 139/WG 1 "Coating systemsfor masonry" (Convenor: R. Michel, France) which had formed a Joint Group with CEN/TC 104/SC 8/WG 1 "Surfaceprotection" (Convenor: Dr. R. Stenner, Germany).EN 1062 consists of the following parts under the general title Paints and varnishes – Coating materials and coatingsystems for exterior masonry and concrete:Part 1: ClassificationPart 2: Determination and classification of water-vapour transmission rate (permeability)1)Part 3: Determination and classification of liquid-water transmission rate (permeability)Part 6: Determination of carbon dioxide permeabilityPart 7: Determination of crack-bridging properties – Test methods and classificationPart 11: Methods of conditioning before testingThe annex A, B and C of this European Standard are normative.According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countriesare bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France,Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden,Switzerland and the United Kingdom.IntroductionThis is one of a number of Parts of EN 1062 dealing with test methods for coating materials and coating systemsfor exterior masonry and concrete. It should be read in conjunction with EN 1062-1.1
ScopeThis European Standard specifies two methods for determining the carbon dioxide permeability of coatings, coatingsystems and related products, intended for exterior masonry and concrete.The methods are applicable to coatings and coating systems on porous substrates such as plaster, concrete etc.2
Normative referencesThis European Standard incorporates, by dated or undated reference, provisions from other publications. Thesenormative references are cited at the appropriate places in the text, and the publications are listed hereafter. Fordated references, subsequent amendments to or revisions of any of these publications apply to this EuropeanStandard only when incorporated in it by amendment or revision. For undated references the latest edition of thepublication referred to applies (including amendments).EN 1062-1:1996, Paints and varnishes – Coating materials and coating systems for exterior masonry - Part 1:Classification.EN 1062-11, Paints and varnishes – Coating materials and coating systems for exterior masonry and concrete – Part11: Methods of conditioning before testing.EN ISO 15528, Paints and varnishes and raw materials for paints and varnishes – Sampling (ISO 15528:2000).EN 23270:1991, Paints and varnishes and their raw materials – Temperatures and humidities for conditioning andtesting (ISO 3270:1984).EN ISO 1513, Paints and varnishes – Examination and preparation of samples for testing (ISO 1513:1992).EN ISO 2808:1999, Paints and varnishes – Determination of film thickness (ISO 2808:1997).1) Published as EN ISO 7783-2.2SIST EN 1062-6:2003



EN 1062-6:2002 (E)EN ISO 7783-1:1999, Paints and varnishes – Determination of water-vapour transmission rate – Part 1: Dish methodfor free films (ISO 7783-1:1996, including Technical Corrigendum 1:1998).3
Terms and definitionsFor the purposes of this European Standard, the following terms and definitions apply.3.1
carbon dioxide permeability iamount of carbon dioxide in grams (g) that will diffuse in one day (d) through one square metre of the coating underthe action of a defined partial pressure or difference in concentration. It is expressed in g/(m2 × d)3.2
diffusion-equivalent air layer thickness sDthickness of a static air layer that possesses, under the same conditions, the same carbon dioxide permeability asthe coating. It is expressed in m3.3
diffusion resistance number µnumber indicating how many times more a coating is impermeable to carbon dioxide than a static air layer of thesame thickness under the same conditions4
Principle4.1
Method A: Gravimetric methodThe coated side of a test piece is exposed to the measuring gas, and the diffused carbon dioxide is determinedquantitatively. The test piece seals a test cell containing an absorbant for carbon dioxide so that the cell is gas-tightto the surroundings. The test cell is kept in a dry carbon dioxide/air atmosphere at (23 ± 2) °C and weighed atregular intervals. The carbon dioxide permeability is calculated from the increase of mass. The determination iscompleted when a steady state is reached, i.e. when the increase of mass no longer changes with time.For control purposes, a reference film (standard) of known carbon dioxide permeability is measured in each seriesof determinations.4.2
Method B: Carrier gas methodA coated test piece is clamped between two halves of a permeation cell and the two halves are made gas-tight toeach other and to the surroundings. Through one half of the permeation cell the measuring gas passes, whilstthrough the other half a carrier gas stream (preferably nitrogen or air, free from carbon dioxide) passes. This carriergas stream transports the diffused carbon dioxide to a detection system, based on infrared spectrometry or gaschromatography. The determination is carried out at (23 ± 2) °C and is completed when a steady state is reached,i.e. when the carbon dioxide permeability no longer changes with time.Both gases (measuring gas and carrier gas) can be humidified as required. For control purposes, a reference film (standard) of known carbon dioxide permeability is measured in each seriesof determinations.Both methods are carried out isostatically, i.e. the test piece is not subjected to a difference in absolute pressure butto a difference in partial pressure.NOTE When using method A, only a dry carbon dioxide/air mixture can be used because the absorbent would react withhumidity from the measuring gas. Therefore, if the carbon dioxide permeability is to be known at a different humidity level,for example at 50 % relative humidity, only method B is suitable.5
Apparatus and materials5.1
For methods A and B5.1.1
Carbon dioxide gas analyzer, for measuring the carbon dioxide concentration of the measuring and carriergases in the range 0 % to 20 % (V/V) carbon dioxide.5.1.2
Device for measuring film thickness, suitable for measurements to a limit deviation of at least 3 % of thethickness of the substrate.5.1.3
Barometer, for measuring the atmospheric pressure to a limit deviation of ± 400 Pa.5.1.4
Measuring gas, containing (10 ± 0,5) % (V/V) carbon dioxide, prepared by mixing 1 part by volume of carbondioxide and 9 parts by volume of dry air.5.1.5
Reference film (standard), of thickness (50 ± 5) µm, for use as a calibration film for the measurement device.SIST EN 1062-6:2003



EN 1062-6:2002 (E)NOTE For the diffusion resistance number of the reference film which is commercially available by Polymer-Institut,Quellenstraße 3, D-65439 Flörsheim-Wicker, a value of µ = 1,75 × 106 has been found, as a result of a comparative testingprogramme.5.1.6
Sealing material. A wax material complying with the requirements of EN ISO 7783-1:1999, D.1.3 (see annexA) or two-component adhesives have been found suitable.5.1.7
Substrate. For coatings not requiring a reaction with the substrate, any substrate is suitable which has awater-vapour transmission rate of not more than 240 g/(m² × d), for instance glass frites, unglazed ceramic tiles. Thearea shall be at least 60 cm² for one side. 5.2
For method A only5.2.1
Test chamber, consisting of a gas-tight vessel, equipped with a suitable device for circulating the measuringgas. A desiccator of volume about 20 l or a gas-tight oven is suitable.5.2.2
Test cellsDishes complying with the requirements of EN ISO 7783-1:1999, 7.1, are suitable. The dishes shall be resistantunder the test conditions. A suitable test cell is shown in Figure 1.Dimensions in millimetresKey1 Test piece2 AbsorbentFigure 1 – Example of test cell5.2.3
Balance, capable of weighing up to 400 g to 1 mg.5.2.4
Absorbentsa)Desiccant: Phophorus pentoxide with moisture indicator or a molecular sieve with indicator are suitable.b)Carbon dioxide absorbent: Sodium hydroxide on a support, granulated for elemental analysis, is suitable.5.3
For method B only5.3.1
Metal templates, for holding the test pieces, fitting to the permeation cell (5.3.2). Templates made of stainlesssteel sheet of thickness 1 mm, having a circular opening of diameter 90,5 mm, have been found suitable.5.3.2
Permeation cell, made of impermeable material, preferably of metal or glass, and consisting of two halves(schematic diagram see Figure 2). The two halves are each provided with an inlet and an outlet for the measuringgas and the carrier gas respectively. Permeation cells with a volume of 150 cm3 of each of the two halves aresuitable.4SIST EN 1062-6:2003



EN 1062-6:2002 (E)Key1 Test specimen on template2 Measuring gas: 10 % (V/V) CO2/90 % (V/V) N23 Carrier gas: N2 or aira) Gas inputb) Gas outputFigure 2 – Schematic diagram of permeation cell5.3.3
System for gas analysis. Any measurement method that quantitatively determines carbon dioxide innitrogen or air is suitable. Recognized methods comprise infrared detection or gas-chromatographic methods.5.3.4
Carrier gas. Nitrogen or air, dry and free from carbon dioxide, are suitable.6
SamplingTake a representative sample of the product to be tested (or of each product in the case of a multi-coat system),as described in EN ISO 15528.Examine and prepare each sample for testing, as described in EN ISO 1513.7
Test pieces7.1
SubstrateIf not otherwise agreed, use the substrate specified in 5.1.7.7.2
Number and dimensionsPrepare three test pieces for each determination. The diameter of the test piece shall be at least four times thethickness of the test piece. The surface area of the coating to be exposed shall be circular and shall be at least60 cm2.7.3
PreparationCoat the substrate and dry the coating in accordance with the manufacturer's instructions.Condition the test pieces in accordance with EN 1062-11 prior to testing. The conditioning method shall beagreed between the interested parties and stated in the test report. Afterwards, either– dry over desiccant (5.2.4) to constant mass, or– condition at the humidity level agreed between the interested parties (method B).5SIST EN 1062-6:2003



EN 1062-6:2002 (E)7.4
Dry film thicknessa)
Free filmsMeasure the thickness either prior to testing, using a thickness gauge with mechanical or electronic reading (e.g.surface calipers) or, after testing, using a microscope method in accordance with EN ISO 2808:1999, method 5A.b)
Coatings on substrate (see 5.1.7)Break the test pieces after testing and measure the coating thickness at the cross section, using a microscopemethod in accordance with EN ISO 2808:1999, method 5A.8
Procedure8.1
Method A – Gravimetric methodCarry out the determination in triplicate.Fill the test cell (5.2.2) with a sufficient quantity of the carbon dioxide absorbent (5.2.4 b)) to ensure absorption ofcarbon dioxide during the whole duration of the determination. Maintain a space of 10 mm between the surfaceof the absorbent and the level of the test piece (this makes it possible to rearrange the absorbent by shaking).Close the filled test cell with the test piece so that the coated side is facing upwards and the cell is gas-tight tothe surroundings. Place the cell with
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