SIST EN 1744-3:2002

Tests for chemical properties of aggregates - Part 3: Preparation of eluates by leaching of aggregates

This European standard specifies a method for the preparation of eluates, by leaching of aggregates, for subsequent investigation of physical and chemical properties by existing standard methods for the purpose of compliance testing. It applies to unbound aggregates that have a particle size below 32 mm with or without size reduction (see clause 8).

Prüfverfahren für chemische Eigenschaften von Gesteinskörnungen - Teil 3: Herstellung von Eluaten durch Auslaugung von Gesteinskörnungen

Diese Europäische Norm legt ein Verfahren für die Herstellung von Eluaten durch Auslaugung von Gesteinskörnungen für die nachfolgende Untersuchung der physikalischen und chemischen Eigenschaften mittels vorhandener genormter Verfahren zur Prüfung der Konformität fest. Sie gilt für ungebundene Gesteinskörnungen, die eine Korngröße unter 32 mm mit oder ohne Korngrößenreduzierung haben (siehe Abschnitt 8).

Essais pour déterminer les propriétés chimiques des granulats - Partie 3: Préparation d'éluats par lixiviation des granulats

La présente norme européenne spécifie une méthode de préparation d'éluats par lixiviation de granulats en vue de l'étude ultérieure des propriétés physiques et chimiques selon des méthodes normalisées existantes. Elle s'applique aux graves de granularité inférieure à 32 mm, avec ou sans réduction (voir article 8).

Preskusi kemičnih lastnosti agregatov - 3. del: Priprava izlužkov agregatov

General Information

• Status: Published
• Publication Date: 31-Aug-2002
• ICS: 91.100.15 - Mineral materials and products
• Technical Committee: AGR - Aggregates
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Sep-2002
• Due Date: 01-Sep-2002
• Completion Date: 01-Sep-2002
• Directive: 2022-01-1772 - Uredba o odpadkih
• 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: EN 1744-3:2002 - Tests for chemical properties of aggregates - Part 3: Preparation of eluates by leaching of aggregates

Overview

SIST EN 1744-3:2002 is a European standard developed by the European Committee for Standardization (CEN), specifying a standardized method for preparing eluates through the leaching of aggregates. This method is essential for analyzing the chemical and physical properties of unbound aggregates with particle sizes below 32 mm, either as delivered or after size reduction. The eluates produced are used for compliance testing using existing standard methods, facilitating consistent evaluation of environmental and material performance aspects of aggregates.

The preparation of eluates by leaching allows for the extraction of soluble components, which reveals the chemical influence of aggregates in applications such as construction materials and environmental assessments. This standard is part 3 of the EN 1744 series on chemical testing of aggregates, contributing to harmonized test methods across Europe.

Key Topics

• Scope and Applicability
  EN 1744-3 applies specifically to unbound aggregates below 32 mm particle size, including natural, manufactured, and recycled aggregates used in construction.

• Test Methodology
  Aggregates are leached by immersion on a screen insert within a glass tank filled with purified water at a liquid to solid mass ratio of 10:1. The sample is agitated via a motor-driven dip stirrer for 24 hours at room temperature (20-25 °C) to promote near equilibrium between solid and liquid phases.

• Sample Preparation
  Samples are air-dried to constant mass if wet, reduced in size for laboratory testing according to EN 932-2 procedures, and sieved to ensure appropriate particle size distribution, including crushing particles larger than 32 mm.

• Eluate Collection and Analysis
  After leaching, the eluate is collected, filtered or centrifuged depending on the analysis type (inorganic vs. organic parameters), and tested immediately or preserved. Parameters such as pH and electrical conductivity are measured, providing valuable chemical indicators.

• Apparatus and Reagents
  The method requires calibrated and specific laboratory equipment: glass leaching tanks, PTFE stirrers, precision balances, centrifuges, pH meters, conductivity meters, and ultra-pure water (grade 3 as per EN ISO 3696). Quality of reagents and apparatus conformity to EN 932-5 ensures reliable and reproducible results.

Applications

• Environmental Compliance Testing
  Assessing the potential leaching of harmful substances from aggregates to groundwater or soil during construction or demolition processes.

• Construction Material Quality Control
  Monitoring chemical properties affecting durability, compatibility with cementitious materials, or potential aggressiveness.

• Material Research and Development
  Developing new aggregate products with controlled chemical release profiles for sustainable construction practices.

• Recycling and Waste Management
  Evaluating recycled aggregates to ensure their chemical properties conform with regulatory requirements and prevent environmental hazards.

Related Standards

EN 1744-3 is part of a comprehensive European test suite for aggregate properties, linked to several related standards:

• EN 1744-1: Chemical Analysis of Aggregates
• EN 1744-2: Determination of Resistance to Alkali Reaction
• EN 1744-4: Water Susceptibility of Fillers for Bituminous Mixtures
• EN 932 series: General Properties of Aggregates (sampling, reduction, equipment)
• EN 933 series: Geometrical Properties of Aggregates (particle size distribution)
• EN 1097 series: Mechanical and Physical Properties of Aggregates
• EN ISO 3696: Specification for Water Quality Used in Laboratories

These interlinked standards provide a full framework for testing aggregates' physical, mechanical, thermal, and chemical properties, supporting consistent product quality and environmental safety.

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Keywords: EN 1744-3, chemical properties of aggregates, eluates preparation, aggregate leaching test, European standards for aggregates, aggregate compliance testing, leaching method, environmental testing of aggregates, construction materials testing, aggregate quality control.

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Prüfverfahren für chemische Eigenschaften von Gesteinskörnungen - Teil 3: Herstellung von Eluaten durch Auslaugung von GesteinskörnungenEssais pour déterminer les propriétés chimiques des granulats - Partie 3: Préparation d'éluats par lixiviation des granulatsTests for chemical properties of aggregates - Part 3: Preparation of eluates by leaching of aggregates91.100.15Mineralni materiali in izdelkiMineral materials and productsICS:Ta slovenski standard je istoveten z:EN 1744-3:2002SIST EN 1744-3:2002en01-september-2002SIST EN 1744-3:2002SLOVENSKI
STANDARD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 1744-3July 2002ICS 91.100.15English versionTests for chemical properties of aggregates - Part 3: Preparationof eluates by leaching of aggregatesEssais pour déterminer les propriétés chimiques desgranulats - Partie 3: Préparation d'éluats par lixiviation desgranulatsPrüfverfahren für chemische Eigenschaften vonGesteinskörnungen - Teil 3: Herstellung von Eluaten durchAuslaugung von GesteinskörnungenThis European Standard was approved by CEN on 5 March 2002.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, Malta, 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© 2002 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 1744-3:2002 ESIST EN 1744-3:2002

It applies to unbound aggregates that have a particle size below 32 mm with or without sizereduction (see clause 8).2 Normative referencesThis European Standard incorporates by dated or undated reference, provisions from other publications. Thesenormative references are cited at the appropriate places in the text, and the publications are listed hereafter. Fordated references, subsequent amendments to or revisions of any of these publications apply to this EuropeanStandard only when incorporated in it by amendment or revision.
For undated references the latest edition of thepublication referred to applies (including amendments).EN 932-1, Tests for general properties of aggregates — Part 1: Methods for sampling.EN 932-2, Tests for general properties of aggregates — Part 2: Methods for reducing laboratory samples.EN 932-5, Tests for general properties of aggregates — Part 5: Common equipment and calibration.EN 933-2, Tests for geometrical properties of aggregates — Part 2: Determination of particle size distribution — Testsieves, nominal size of apertures.EN 1097-5, Tests for mechanical and physical properties of aggregates — Part 5: Determination of the water contentby drying in a ventilated oven.EN ISO 3696, Water for analytical laboratory use — Specification and test methods (ISO 3696:1987).3 Terms and definitionsFor the purposes of this European Standard, the following terms and definitions apply.3.1leachantliquid used in a laboratory leaching procedure3.2eluatesolution remaining after the laboratory leaching procedure of a solid material in contact with a leachant3.3constant masssuccessive weighings after drying at least 1 h apart not differing by more than 0,1 %.NOTEIn many cases constant mass can be achieved after a test portion has been dried for a pre-determined period in aspecified oven at (110 ± 5) °C.
Test laboratories can determine the time required to achieve const
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