EN 772-5:2001

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.]LGDNLKPrüfverfahren für Mauersteine - Teil 5: Bestimmung des Gehalts an aktiven löslichen Salzen von MauerziegelnMéthodes d'essai des éléments de maçonnerie - Partie 5: Détermination de la teneur en sels solubles actifs des éléments de maçonnerie en terre cuiteMethods of test for masonry units - Part 5: Determination of the active soluble salts content of clay masonry units91.100.25Ceramic building productsICS:Ta slovenski standard je istoveten z:EN 772-5:2001SIST EN 772-5:2002en01-april-2002SIST EN 772-5:2002SLOVENSKI
STANDARD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 772-5December 2001ICS 91.100.20English versionMethods of test for masonry units - Part 5: Determination of theactive soluble salts content of clay masonry unitsMéthodes d'essai des éléments de maçonnerie - Partie 5:Détermination de la teneur en sels solubles actifs deséléments de maçonnerie en terre cuitePrüfverfahren für Mauersteine - Teil 5: Bestimmung desGehalts an aktiven löslichen Salzen von MauerziegelnThis European Standard was approved by CEN on 10 November 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 772-5:2001 ESIST EN 772-5:2002

is the volume of EDTA titrated, en millilitres (ml)C1is the
lower reference sample concentration, in percentage (%)C2is the higher reference sample, concentration, in percentage (%)Cxis the sample concentration, in percentage (%)E1
is the measured signal for the lower reference sample concentration C1E2
is the measured signal for the higher reference sample, concentration C2Ex is the measured signal for sampledis the dilution factorSIST EN 772-5:2002

La Cl 3
7H 2 O
210 g / l SolutionCaesium Chloride
CsCl
63 g / l Solution5.3 Instrumental method Atomic Absorption Spectroscopy (AAS) and flame photometry orinductively coupled plasma spectrometry (ICP)High purity standard solutions5.4 EDTA method (alternative)Magnesium metalEthylenediamine tetra acetic acid (EDTA)Indicators :CalceinMethyl thymol blue complexonePotassium hydroxideAmmonia solution (relative density 0,88)Potassium nitrate6 Apparatus6.1 Test sieves, complying with the requirements of ISO 3310-1, ISO 3310-26.2Mortar or other suitable grinding equipment capable of producing particles to pass a 150 m testsieve.6.3Polyethylene bottle or Conical flask , typically with a capacity 500 ml6.4 Weighing instrument, readable to the nearest 0,1 mgSIST EN 772-5:2002

5) min-1having a horizontal movement of 20 mm, or a rotary shaker capable of revolving at 30 r/min
3min-1.6.10Polyethylene bottle typically with a capacity of between 1 l and 1,5 l.7 Preparation of sample7.1. SamplingThe method of sampling shall be in accordance with prEN 771-1. The minimum number of specimensfor the determination of the active soluble salts content shall be six and shall comprise whole units buta larger number may be specified in the product specification, in which case that larger number shallbe used. The specimens shall be sampled in such a manner that they have not been exposed to waterthat would lead to leaching of soluble salts from the units.From the bulk sample of units a representative sample of 50 g to 250 g of material, ground to pass a150 µm test sieve (6.1), is prepare
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