SIST EN 459-2:2002

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Gradbeno apno – 2. del: Metode preskušanjaBaukalk - Teil 2: PrüfverfahrenChaux de construction - Partie 2: Méthodes d'essaiBuilding lime - Part 2: Test methods91.100.10Cement. Mavec. Apno. MaltaCement. Gypsum. Lime. MortarICS:Ta slovenski standard je istoveten z:EN 459-2:2001SIST EN 459-2:2002en01-april-2002SIST EN 459-2:2002SLOVENSKI
STANDARDSIST EN 459-2:1995/AC:2001SIST EN 459-2:19951DGRPHãþD

EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 459-2October 2001ICS 91.100.10Supersedes EN 459-2:1994English versionBuilding lime - Part 2: Test methodsChaux de construction - Partie 2: Méthodes d'essaiBaukalk - Teil 2: PrüfverfahrenThis European Standard was approved by CEN on 16 February 2001.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, 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© 2001 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 459-2:2001 ESIST EN 459-2:2002

Sampling3.1
GeneralSampling shall be carried out as specified in 3.1 to 3.4 taking into account the need to minimize moisture and carbondioxide absorption.3.2
Sampling of powdered materialSampling shall be carried out in accordance with EN 196-7.Before carrying out chemical analysis, the sample shall be reduced in mass by means of a sample divider and/orby quartering to produce a sub-sample of suitable mass for the intended determinations. Any coarse material shallbe reduced in size to less than 0,3 mm.3.3
Sampling of granular materialSampling shall be carried out in accordance with EN 932-1.Before carring out chemical analysis, the sample shall be crushed, ground and reduced in mass to produce a sub-sample finer than 0,3 mm and of suitable mass for the intended determinations.3.4
Sampling lime puttiesThe spot sample size shall be (10 ± 5) dm3.Where lime putties are sampled, the increments shall be blended thoroughly.
1) EN 196-21 is currently being incorporated into EN 196-2.4SIST EN 459-2:2002

Chemical analysis4.1
General requirements for testing4.1.1
Number of testsAnalysis of a building lime may require the determination of a number of its chemical properties. For each determina-tion one or more tests shall be carried out in which the number of measurements to be taken shall be as specifiedin the relevant clause of this standard.Where the analysis is one of a series subject to statistical control, determination of each chemical property by asingle test shall be the minimum required.Where the analysis is not a part of a series subject to statistical control, the number of tests for determination ofeach chemical property shall be two (see also 4.3).In the case of a dispute, the number of tests for determination of each chemical property shall be two (see also 4.3).4.1.2
Expression of masses, volumes, factors and resultsExpress masses in grams to the nearest 0,0001 g and volumes from burettes in millilitres to the nearest 0,05 ml.Express the factors of solutions, given by mean of three measurements, to three decimal places.Express the results, where a single test result has been obtained, as a percentage generally to two decimal places.Express the results, where two test results have been obtained, as the mean of the results, as a percentagegenerally to two decimal places.If the two test results differ by more than twice the standard deviation of repeatability (laboratory), repeat the test andtake the mean of the two closest test results.The results of all individual tests shall be recorded.4.1.3
Blank determinationsCarry out a blank determination without a sample, where relevant, following the same procedure and using the sameamounts of reagents. Correct the results obtained for the analytical determination accordingly.4.1.4
ReagentsAll reagents shall be of an analytical grade appropriate for the method being used. The water used shall comply withthe appropriate grade specified in EN ISO 3696.4.1.5
Evaluation of test resultsThe chemical requirements for building limes are specified in Table 2 of EN 459-1:2001. For quicklime the specifiedvalues correspond to the finished product.For all other types (hydrated lime, lime putty, hydraulic and natural hydraulic lime) the values are based on theproduct after subtraction of its free water and bound water content. The values obtained by application of proceduresdescribed in this European Standard for calcium and magnesium oxide (4.2), magnesium oxide (4.3), carbon dioxide(4.4), sulfate (4.6) and available lime (4.7) are for the products without subtraction of the free water and bound watercontent. To compare these values with Table 2 of EN 459-1:2001, they shall first be corrected by multiplication byfactor F. Factor F shall be determined in the following way.Determine the carbon dioxide content as described in 4.4 and the loss on ignition as described in 4.5. The loss onignition is the sum of the free water, bound water and carbon dioxide, provided that the sample does not contain anyhighly volatile compounds or oxidizable constituents. Calculate the total (free + bound) water content WT as apercentage by mass of the sample using.5SIST EN 459-2:2002

Calcium and magnesium oxide (CaO + MgO)Determine the (CaO + MgO) content using the method given in EN 196-2. 4.3
Magnesium oxide (MgO)Determine the (MgO) content using the method given in EN 196-2.4.4Carbon dioxide (CO2)4.4.1Reference methodDetermine the CO2 content using the reference method given in EN 196-21.4.4.2Volumetric determination of carbon dioxide (alternative method)4.4.2.1PrincipleThe CO2 contained in the building lime in the form of carbonates is given off by reaction with hydrochloric acid anddetermined volumetrically.4.4.2.2ApparatusThe apparatus is shown in Figure 1.6SIST EN 459-2:2002
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