SIST EN 14629:2007
(Main)Products and systems for the protection and repair of concrete structures - Test methods - Determination of chloride content in hardened concrete
Products and systems for the protection and repair of concrete structures - Test methods - Determination of chloride content in hardened concrete
This standard describes two methods for the determination of the total (free and bound) acid soluble chloride content of hardened concrete or mortar. This information is intended for use in estimating the risk of chloride induced corrosion of the steel reinforcement. It may be used on samples of powder obtained either by drilling or from cores or fragments removed from concrete structures or on other appropriate laboratory specimens.
Produckte und Systeme für den Schutz und die Instandsetzung von Betontragwerken - Prüfverfahren - Bestimmung des Chloridgehaltes von Festbeton
Diese Norm beschreibt zwei Verfahren zur Bestimmung des Gesamtgehaltes an (freiem und gebundenem) säurelöslichem Chlorid in Festbeton und erhärtetem Zement. Diese Angaben sind für die Einschätzung der Gefahr einer durch Chloride verursachten Korrosion der Stahlbewehrung vorgesehen. Das Verfahren kann an Pulverproben, die aus Betontragwerken durch Bohren oder aus Bohrkernproben oder aus Fragmenten gewonnen werden, oder an anderen geeigneten Laborprobekörpern durchgeführt werden.
Produits et systemes pour la protection et la réparation des structures en béton - Méthodes d'essais - Mesurage du taux de chlorure d'un béton durci
Proizvodi in sistemi za zaščito in popravilo betonskih konstrukcij - Preskusne metode -Ugotavljanje deleža vodotopnih kloridov in v strjenem betonu
General Information
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Products and systems for the protection and repair of concrete structures - Test methods - Determination of chloride content in hardened concreteRQXProduits et systemes pour la protection et la réparation des structures en béton - Méthodes d'essais - Mesurage du taux de chlorure d'un béton durciProduckte und Systeme für den Schutz und die Instandsetzung von Betontragwerken - Prüfverfahren - Bestimmung des Chloridgehaltes von FestbetonTa slovenski standard je istoveten z:EN 14629:2007SIST EN 14629:2007en;fr;de91.100.30Beton in betonski izdelkiConcrete and concrete productsICS:SLOVENSKI
STANDARDSIST EN 14629:200701-julij-2007
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 14629March 2007ICS 91.100.30 English VersionProducts and systems for the protection and repair of concretestructures - Test methods - Determination of chloride content inhardened concreteProduits et systèmes pour la protection et la réparation desstructures en béton - Méthodes d'essais - Mesurage dutaux de chlorure d'un béton durciProduckte und Systeme für den Schutz und dieInstandsetzung von Betontragwerken - Prüfverfahren -Bestimmung des Chloridgehaltes von FestbetonThis European Standard was approved by CEN on 7 September 2006.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 CEN 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 CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2007 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 14629:2007: E
EN 14629:2007 (E) 2 Contents Page Foreword.3 Introduction.4 1 Scope.5 2 Normative references.5 3 Materials and apparatus.5 3.1 Chemicals.5 3.2 Apparatus.5 4 Test procedure.6 4.1 Sampling.6 4.2 Grinding.7 4.3 Chemical analysis.7 5 Test report.9 Bibliography.10
EN 14629:2007 (E) 3 Foreword This document (EN 14629:2007) has been prepared by Technical Committee CEN/TC 104 “Concrete and related products”, 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 or by endorsement, at the latest by September 2007, and conflicting national standards shall be withdrawn at the latest by September 2007. 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. It has been prepared by sub-committee 8 "Products and systems for the protection and repair of concrete structures" (Secretariat AFNOR). This European Standard is one of a series dealing with products and systems for the protection and repair of concrete structures. It describes a method for determining the chloride content of hardened concrete. 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, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom.
EN 14629:2007 (E) 4 Introduction Steel reinforcement in concrete may be at risk of corrosion if the concrete is contaminated by chlorides. ENV 1504-9 defines the principles for protection and repair of concrete structures which have suffered or may suffer damage or deterioration and gives guidance on the selection of products and systems which are appropriate for this intended use. EN 1504-10 requires that the concentration of chlorides be considered when decisions about the removal of concrete are made. To establish whether there is a risk of corrosion of the steel reinforcement due to a higher chloride content within the concrete than the critical threshold value, the chloride content within the concrete cover and especially at the surface of the steel reinforcement should be determined. Assessment may be made in the field using a variety of rapid test methods, which are not included in this standard. For accurate determination of chloride content, concrete samples need to be taken from the structure, prepared for chemical analysis and analysed. For chemical analysis of the concrete with respect to the chloride content either Volhard’s method or potentiometric titration are used as the reference methods. The chloride content may be expressed as a percentage of chloride by mass of cement or of concrete. The chloride content by mass of cement may be derived using either an assumed value for the cement content of the concrete or a value which has been determined by chemical analysis or from construction records.
EN 14629:2007 (E) 5 1 Scope This standard describes two methods for the determination of the total (free and bound) acid soluble chloride content of hardened concrete or mortar. This information is intended for use in estimating the risk of chloride induced corrosion of the steel reinforcement. It may be used on samples of powder obtained either by drilling or from cores or fragments removed from concrete structures or on other appropriate laboratory specimens. 2 Normative references The 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 the referenced document (including any amendments) applies. ISO 384, Laboratory glassware - Principles of design and construction of volumetric glassware 3 Materials and apparatus 3.1 Chemicals Deionised water with an electrical conductivity less than 2µS/cm; Nitric acid (5 mol/l); Silver nitrate solution (0,02 mol/l); Ammonium thiocyanate (NH4SCN) solution (0,1 mol/l); Ammonium ferric sulfate indicator solution (100 ml of a cold saturated solution of NH4Fe(SO4)2 and 10 ml diluted nitric acid); 3,5,5-trimethylhexanol. NOTE For the potentiometric method, additional reagents may be required as specified by the electrode manufacturer to ensure the proper functioning of the electrode. These will be specified in the manufacturer’s instructions for the electrode. 3.2 Apparatus Crushing and grinding equipment (as required to prepare samples); 1,18 mm sieve or smaller; ventilated oven, controlled to maintain a temperature of (105 ± 5) °C; balance capable of weighing up to 5 g to an accuracy of 1 mg; desiccator; burette, accurate to 0,05 ml; 250 ml glass beaker; magnetic stirrer;
EN 14629:2007 (E) 6 heat source; vacuum filtering facility (Buchner funnel, filtration flask, medium-textured filter paper); 250 ml volumetric flask; pipettes accurate to 0,1 ml; if required, potentiome
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