EN 1744-5:2006
(Main)Tests for chemical properties of aggregates - Part 5: Determination of acid soluble chloride salts
Tests for chemical properties of aggregates - Part 5: Determination of acid soluble chloride salts
This European Standard specifies the procedure for the determination of acid soluble chloride salts which may be present in aggregates. This test is suitable for aggregates where the chloride content does not derive directly from contact with, or immersion in, saline water. Examples of such aggregates are: recycled aggregates containing hydrated cement, where chloride may be bound as calcium chloroaluminates; and some aggregates from desert areas where chloride is occluded within the aggregate particles.
Prüfverfahren für chemische Eigenschaften von Gesteinkörnungen - Teil 5: Bestimmung der säurelöslichen Chloride
Diese Europäische Norm legt ein Verfahren zur Bestimmung säurelöslicher Chloride fest, die in Gesteins-körnungen
vorhanden sein können. Diese Prüfung ist für Gesteinskörnungen geeignet, deren Chloridgehalt
nicht unmittelbar aus dem Kontakt mit oder durch Eintauchen in Salzwasser abzuleiten ist. Beispiele für
Gesteinskörnungen dieser Art sind: rezyklierte Gesteinskörnungen mit abgebundenem Zement, in denen
Chloride als Calciumchloraluminate gebunden sein können sowie einige Gesteinskörnungen aus
Wüstengebieten, in denen Chloride in den Gesteinskörnern eingeschlossen sind.
Essais relatifs aux propriétés chimiques des granulats - Partie 5: Dosage des sels chlorures solubles dans l’acide
La présente Norme européenne spécifie un mode opératoire qui permet de doser les chlorures solubles dans l’acide, susceptibles d’être présents dans les granulats. Le présent essai convient pour des granulats dont la teneur en chlorures n’est pas directement due à un contact avec des eaux salines ou à une immersion dans ces dernières. A titre d’exemple, on peut citer les granulats recyclés contenant du ciment hydraté dans lesquels les chlorures peuvent être liés sous forme de chloro-aluminates de calcium ainsi que certains granulats situés dans les régions désertiques où les chlorures sont inclus dans les particules des granulats.
Preskusi kemičnih lastnosti agregatov – 5. del: Določevanje kloridnih soli, topnih v kislini
General Information
- Status
- Published
- Publication Date
- 03-Oct-2006
- Withdrawal Date
- 29-Apr-2007
- Technical Committee
- CEN/TC 154 - Aggregates
- Drafting Committee
- CEN/TC 154/SC 6 - Test methods
- Current Stage
- 9060 - Closure of 2 Year Review Enquiry - Review Enquiry
- Start Date
- 02-Dec-2022
- Completion Date
- 02-Dec-2022
- Directive
- 89/106/EEC - Construction products
Overview
EN 1744-5:2006 (CEN) specifies the laboratory procedure for the determination of acid-soluble chloride salts in aggregates. The method is intended for aggregates whose chloride content does not originate from direct exposure to saline water - for example, recycled aggregates containing hydrated cement (chlorides bound as calcium chloroaluminates) and some desert aggregates where chloride is occluded inside particles. The standard describes sampling, reagents, apparatus, the Volhard titration principle and reporting requirements.
Key Topics
- Scope and applicability: Suitable for aggregates where chloride is acid-soluble and not directly derived from seawater contact.
- Principle: Powdered aggregate is extracted with boiling dilute nitric acid. Dissolved halides (expressed as chloride) are precipitated with a known volume of 0,100 mol/l silver nitrate (AgNO3). After boiling and filtration, the residual Ag+ is back-titrated with a standardized thiocyanate solution using ammonium iron(III) sulfate as an indicator (Volhard method).
- Reagents & concentrations: The standard references analytical-grade reagents and specifies key solutions: 0,100 mol/l AgNO3, approximately 0,1 mol/l thiocyanate, and a concentrated nitric acid preparation. General density ranges for concentrated acids are provided.
- Sampling & specimen preparation: Laboratory samples shall be representative of moisture and solids (see EN 932-1). A typical test specimen is approximately 2 g of finely powdered material (see EN 1744-1 for preparation).
- Critical notes: Aggregates with significant carbonates may froth on acid addition - add acid slowly while stirring. If the measured chloride exceeds about 0,85 %, a smaller test portion is required.
Applications
This test is used to:
- Evaluate chloride content in recycled concrete aggregates to assess potential corrosion risk when reused in concrete or other cementitious products.
- Assess aggregates from arid environments where occluded chlorides may affect durability.
- Support QA/QC during aggregate acceptance, reclamation, and reuse decisions.
Benefits:
- Provides a reproducible quantitative measure of acid-soluble chloride salts.
- Integrates with other EN 1744 parts and aggregate test standards for comprehensive chemical profiling.
Related Standards
- EN 1744-1:1998 - Preparation of test portions and chemical analysis guidance.
- EN 932-1 / EN 932-5 - Sampling methods and general apparatus requirements.
- EN 1744 series (Parts 1–6) for broader chemical property testing of aggregates.
Reporting requirements per EN 1744-5 include reference to the standard, sample source and designation, mass tested, test result (mean of two determinations to 0,01 %) and test date. Follow the standard text for full procedural and safety details.
Frequently Asked Questions
EN 1744-5:2006 is a standard published by the European Committee for Standardization (CEN). Its full title is "Tests for chemical properties of aggregates - Part 5: Determination of acid soluble chloride salts". This standard covers: This European Standard specifies the procedure for the determination of acid soluble chloride salts which may be present in aggregates. This test is suitable for aggregates where the chloride content does not derive directly from contact with, or immersion in, saline water. Examples of such aggregates are: recycled aggregates containing hydrated cement, where chloride may be bound as calcium chloroaluminates; and some aggregates from desert areas where chloride is occluded within the aggregate particles.
This European Standard specifies the procedure for the determination of acid soluble chloride salts which may be present in aggregates. This test is suitable for aggregates where the chloride content does not derive directly from contact with, or immersion in, saline water. Examples of such aggregates are: recycled aggregates containing hydrated cement, where chloride may be bound as calcium chloroaluminates; and some aggregates from desert areas where chloride is occluded within the aggregate particles.
EN 1744-5:2006 is classified under the following ICS (International Classification for Standards) categories: 91.100.15 - Mineral materials and products. The ICS classification helps identify the subject area and facilitates finding related standards.
EN 1744-5:2006 is associated with the following European legislation: EU Directives/Regulations: 305/2011, 89/106/EEC. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.
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Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Tests for chemical properties of aggregates - Part 5: Determination of acid soluble chloride saltsNLVOLQLEssais relatifs aux propriétés chimiques des granulats - Partie 5: Dosage des sels chlorures solubles dans l’acidePrüfverfahren für chemische Eigenschaften von Gesteinkörnungen - Teil 5: Bestimmung der säurelöslichen ChlorideTa slovenski standard je istoveten z:EN 1744-5:2006SIST EN 1744-5:2007en91.100.15Mineralni materiali in izdelkiMineral materials and productsICS:SLOVENSKI
STANDARDSIST EN 1744-5:200701-marec-2007
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 1744-5October 2006ICS 91.100.15 English VersionTests for chemical properties of aggregates - Part 5:Determination of acid soluble chloride saltsEssais pour déterminer les propriétés chimiques desgranulats - Partie 5: Détermination de la teneur enchlorures solubles dans l'acidePrüfverfahren für chemische Eigenschaften vonGesteinkörnungen - Teil 5: Bestimmung der säurelöslichenChlorideThis European Standard was approved by CEN on 28 August 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 Central Secretariat 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 Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, 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© 2006 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 1744-5:2006: E
EN 932
Tests for general properties of aggregates EN 933
Tests for geometrical properties of aggregates
EN 1097
Tests for mechanical and physical properties of aggregates
EN 1367
Tests for thermal and weathering properties of aggregates EN 13179
Tests for filler aggregate used in bituminous mixtures
The other parts of EN 1744 are, or will be:
Part 1: Chemical analysis
Part 2: Determination of resistance to alkali reaction Part 3: Preparation of eluates by leaching of aggregates Part 4: Determination of water susceptibility of fillers for bituminous mixtures
Part 6: Determination of the influence of recycled aggregate extract on the initial setting time of cement According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, 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.
2 Normative references The following referenced documents are indispensable for the application of this European Standard. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 1744-1:1998, Tests for chemical properties of aggregates — Part 1: Chemical analysis EN 932-1, Tests for general properties of aggregates — Part 1: Methods for sampling EN 932-5, Tests for general properties of aggregates — Part 5: Common equipment and calibration ISO 384, Laboratory glassware — Principles of design and construction of volumetric glassware ISO 1042:1983, Laboratory glassware — One-mark volumetric flasks 3 Definitions For the purposes of this standard, the following terms and definitions apply. 3.1 test portion sample used as a whole in a
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EN 1744-5:2006は、骨材の化学特性に関する試験の一部であり、酸溶性塩化物塩の定量方法を規定しています。この標準は、骨材に含まれる可能性のある酸溶性塩化物塩の検出手順を明確に示しており、特に塩水との接触や浸漬から直接得られるものではない塩化物含有量に適しています。 この標準の範囲は広く、リサイクル骨材（例えば、水和セメントを含むもの）や砂漠地域からの骨材のように、塩化物が骨材粒子内に閉じ込められている場合など、さまざまな状況に適しています。これらの例は、酸溶性塩化物塩の評価が必要となる骨材の特性を考慮しており、環境に配慮した建設資材の利用推進に寄与します。 EN 1744-5:2006の強みは、容易に実施可能な試験手順を提供し、さまざまな骨材における酸溶性塩化物塩の合理的な評価を可能にする点にあります。また、標準化された方法により、異なる実験室間の結果の比較が容易になり、一貫した品質管理が実現します。このような標準の存在は、建設業界における信頼性の高い材料選定において大きな意味を持ちます。 この標準が現代の建設および材料工学において重要である理由は、環境保護とリサイクル資材の利用促進が求められる中で、化学的特性の理解が不可欠だからです。したがって、EN 1744-5:2006は、骨材の特性評価における基準として、非常に関連性の高い文書となっています。
La norme EN 1744-5:2006 se distingue par sa méthodologie rigoureuse et sa pertinence dans l'évaluation des propriétés chimiques des granulats, en particulier pour la détermination des sels de chlorure solubles dans l'acide. Son champ d'application est ciblé, abordant principalement les granulats dont la teneur en chlorures n'est pas le résultat d'un contact direct avec des eaux salines. Cela est particulièrement important pour des types de granulats, tels que les granulats recyclés contenant du ciment hydraté ou ceux issus de zones désertiques, où les chlorures peuvent être piégés au sein des particules. Parmi les points forts de cette norme, on note son adaptation aux matériaux de construction modernes, notamment les granulats recyclés, qui sont de plus en plus utilisés dans les projets de construction durables. La capacité d’identifier et de quantifier les chlorures solubles dans l’acide permet de prévenir d’éventuelles dégradations des structures, garantissant ainsi la durabilité des ouvrages. De plus, la norme EN 1744-5:2006 se révèle essentielle pour les laboratoires d'essai et les professionnels du secteur de la construction, car elle standardise les règles de test, favorisant des résultats fiables et comparables. Cela renforce non seulement la qualité des matériaux utilisés, mais également la sécurité des constructions réalisées. En conséquence, cette norme est non seulement pertinente, mais cruciale pour garantir que les projets de construction respectent les exigences de qualité et de longévité nécessaires dans un environnement compétitif.
표준 EN 1744-5:2006은 집합체의 화학적 속성에 대한 시험 절차를 구체적으로 명시하고 있으며, 특히 산성 용해성 염화물 염을 측정하는 방법을 다루고 있습니다. 이 표준은 염화물 함량이 해수에 접촉하거나 담금질로 인한 것이 아닌 집합체에서 산성 용해성 염화물 염을 결정하는 데 적합합니다. 이러한 구체적인 범위는 재활용 집합체나 사막 지역에서 유래한 특정 집합체에 대해 필수적입니다. 이 표준의 강점 중 하나는 다양한 유형의 집합체에서 염화물 염을 안전하고 정확하게 구별할 수 있다는 점입니다. 예를 들어, 수화된 시멘트를 포함하는 재활용 집합체는 염화물이 칼슘 클로로알루미네이트로 결합되어 있을 수 있습니다. 이러한 특수한 집합체에서 염화물의 존재를 뚜렷하게 규명할 수 있는 절차를 제공함으로써, 건설 현장에서의 품질 관리를 보다 효과적으로 수행할 수 있습니다. EN 1744-5:2006 표준은 화학적 안정성이나 내구성 평가에서 중요한 요소로 작용하는 염화물의 영향을 평가하는 데 필수적인 도구입니다. 이러한 표준을 통해 집합체의 염화물 농도를 신뢰성 있게 측정할 수 있으므로, 건설 자재의 품질 보증 및 안전성을 확보할 수 있습니다. 따라서 이 표준은 관련 산업에서 특히 중요한 역할을 하며, 집합체의 보다 안전한 사용을 위한 기초 데이터를 제공합니다.
Die EN 1744-5:2006 ist eine bedeutende europäische Norm, die sich mit den chemischen Eigenschaften von Gesteinskörnungen befasst. Insbesondere legt sie das Verfahren zur Bestimmung von säurelöslichen Chloriden fest, die in Gesteinskörnungen vorkommen können. Diese Norm ist besonders relevant für Gesteinskörnungen, deren Chloridgehalt nicht direkt aus dem Kontakt mit salzhaltigem Wasser resultiert. Solche Gesteinskörnungen sind beispielsweise recycelte Gesteinskörnungen, die hydratierte Zemente enthalten, wobei Chlorid als Calciumchloroaluminate gebunden sein kann, sowie bestimmte Gesteinskörnungen aus Wüstengebieten, in denen Chlorid in den Aggregatpartikeln eingeschlossen ist. Die Stärke dieser Norm liegt in ihrer präzisen Methodik zur Identifizierung und Quantifizierung von säurelöslichen Chloriden. Diese Tests sind entscheidend, um die Verwendung der Gesteinskörnungen in Bauprojekten zu bewerten, da Chloride potenziell korrosive Eigenschaften haben. Durch das Bereitstellen eines klaren Verfahrens für die Analyse ermöglicht die Norm die Sicherstellung der Qualität von Gesteinskörnungen, wodurch die Langlebigkeit und Sicherheit von Bauwerken erhöht werden. Darüber hinaus trägt die EN 1744-5:2006 zur Harmonisierung der Testmethoden in Europa bei, was den Austausch von Gesteinskörnungen zwischen den Mitgliedstaaten erleichtert. Dies ist besonders wichtig in einer Zeit, in der nachhaltige Baupraktiken und der reibungslose Einsatz von recycelten Materialien zunehmend in den Fokus rücken. Die Norm fördert somit nicht nur die Qualitätssicherung, sondern auch die Umsetzung umweltfreundlicher Praktiken im Bauwesen. Insgesamt ist die EN 1744-5:2006 eine unverzichtbare Norm für Fachleute im Bereich der Baustoffprüfung und gewährleistet die präzise Bestimmung von säurelöslichen Chloridsalzen in Gesteinskörnungen. Ihre Relevanz und Anwendbarkeit in einer Vielzahl von Kontexten machen sie zu einem entscheidenden Instrument für die Qualitätskontrolle in der Bauindustrie.
The EN 1744-5:2006 standard provides a comprehensive framework for the testing of chemical properties in aggregates, with a specific focus on determining the presence of acid soluble chloride salts. This standard is crucial in ensuring the quality and safety of aggregates used in construction and other applications. The scope of the standard is well-defined, specifically targeting aggregates where the chloride content is not attributed to direct exposure to saline water. This specificity enhances the relevance of the standard in various industry contexts, particularly for recycled aggregates incorporating hydrated cement, where chlorides may exist in forms such as calcium chloroaluminates. Furthermore, the inclusion of aggregates from desert regions-where chloride compounds can naturally occur within the aggregate matrix-illustrates the standard's broad applicability. One of the strengths of the EN 1744-5:2006 standard lies in its methodological rigor. By prescribing a clear procedure for testing, it ensures consistent and reliable results which are essential for assessing the chemical properties of aggregates. This reliability is particularly important for stakeholders looking to ascertain the performance and durability of materials used in construction projects. Moreover, the relevance of this standard cannot be overstated, as it addresses critical environmental and safety considerations associated with chloride salts in aggregates. As industries face increasing scrutiny regarding sustainability and material safety, the EN 1744-5:2006 standard provides essential guidelines that align with best practices in environmental stewardship. In summary, the EN 1744-5:2006 standard serves as a vital reference for professionals in the field, offering a thorough approach to determining acid soluble chloride salts in aggregates while ensuring the integrity and performance of materials in varied contexts.
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