EN 14629:2007

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 systèmes 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

• Status: Published
• Publication Date: 20-Mar-2007
• Withdrawal Date: 29-Sep-2007
• ICS: 91.100.30 - Concrete and concrete products
• Technical Committee: CEN/TC 104 - Concrete ( performance, production, placing and compliance criteria )
• Drafting Committee: CEN/TC 104/SC 8/WG 2 - Repair
• Current Stage: 9060 - Closure of 2 Year Review Enquiry - Review Enquiry
• Start Date: 02-Dec-2022
• Completion Date: 02-Dec-2022
• Directive: 305/2011 - Regulation (eu) No 305/2011 of the European Parliament and of the Council of 9 march 2011 laying down harmonised conditions for the marketing of construction products and repealing council directive 89/106/eec
• Directive: 89/106/EEC - Construction products
• Ref Project: SIST EN 14629:2007 - Products and systems for the protection and repair of concrete structures - Test methods - Determination of chloride content in hardened concrete

Overview

EN 14629:2007 is a European standard developed by CEN that specifies test methods for determining the chloride content in hardened concrete. Chloride ions in concrete are critical to assess because they contribute to the corrosion of steel reinforcement, potentially compromising structural integrity. This standard defines two analytical methods-Volhard’s method and potentiometric titration-for measuring total acid soluble chlorides (both free and bound) in concrete or mortar samples. The procedures ensure accurate quantification of chloride levels, supporting risk evaluation and maintenance strategies for concrete structures.

Key Topics

• Scope and Purpose
  EN 14629:2007 focuses on assessing the chloride content of hardened concrete to estimate corrosion risk to steel reinforcement. It applies to samples obtained by drilling, coring, or by other preparation of laboratory specimens.

• Sampling and Preparation
  Sampling must be strategic, considering the structure’s design, location, and exposure conditions. Powder samples are typically obtained by drilling, while cores can be sliced or ground. Samples are dried and ground to pass through a 1.18 mm sieve to ensure uniformity.

• Test Methods

  1. Volhard’s Method (Method A):
     Involves precipitating chloride ions with silver nitrate and titrating the remaining silver nitrate with ammonium thiocyanate using an indicator.
  2. Potentiometric Titration (Method B):
     Utilizes an electrode system to detect titration endpoints accurately by measuring voltage changes during titrant addition.

• Chemical Analysis
  Requires precise weighing of the samples and chemicals, controlled heating, filtration, and titration to quantify chloride levels, expressed as a percentage of chloride ion by mass of sample.

• Reporting Requirements
  Test reports must detail client information, sample identification, method used, and measured chloride contents both by mass of sample and, if requested, by mass of cement. Calculation methods for estimating chloride content based on cement content must be clearly stated.

Applications

• Corrosion Risk Assessment
  Enables engineers and inspectors to identify the extent of chloride contamination in concrete and the potential for corrosion-induced deterioration of steel reinforcement.

• Structural Integrity Evaluation
  Assists in decisions regarding repair, protective treatments, or partial/full removal of damaged concrete to prolong the service life of concrete structures.

• Quality Control in Concrete Repair
  Provides validated test methods that ensure accuracy and reproducibility in chloride measurements, helping to verify the effectiveness of protective systems and repair materials.

• Research and Development
  Supports laboratories and manufacturers in testing and validating new concrete protection products, systems, and technologies against chloride-induced corrosion.

• Regulatory Compliance
  Aligns with related standards and European regulations requiring assessment of chloride levels during concrete repair and protection works.

Related Standards

• EN 1504-9 - General principles for the protection and repair of concrete structures, emphasizing consideration of chloride content to evaluate corrosion risk.

• EN 1504-10 - Specifies requirements for site application and quality control of products and systems used in concrete protection and repair, referencing chloride content as a critical parameter.

• ISO 384 - Principles of volumetric glassware design and construction, relevant for ensuring laboratory equipment used in titration is compliant and accurate.

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Keywords: EN 14629:2007, chloride content determination, hardened concrete testing, Volhard’s method, potentiometric titration, steel reinforcement corrosion, concrete sampling, chloride induced corrosion, concrete structure protection, CEN standards, concrete repair, chloride testing methods

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
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