EN 1744-1:2009/FprA1

Tests for chemical properties of aggregates - Part 1: Chemical analysis

This standard specifies procedures for the chemical analysis of aggregates. It specifies the reference procedures and, in certain cases, an alternative method which can be considered as giving equivalent results. Unless otherwise stated, the test methods specified in this standard may be used for factory production control, for audit tests or for type tests. This standard describes the reference methods used for type testing and in cases of dispute (and alternatives methods) for chemical analyses of aggregates. For the purpose of type testing and in cases of dispute only the reference method should be used. For other purposes, in particular factory production control, other methods may be used provided that an appropriate working relationship with the reference method has been established.

Prüfverfahren für chemische Eigenschaften von Gesteinskörnungen - Teil 1: Chemische Analyse

Essais visant à déterminer les propriétés chimiques des granulats - Partie 1: Analyse chimique

Preskusi kemičnih lastnosti agregatov - 1. del: Kemijska analiza

General Information

• Status: Not Published
• ICS: 91.100.15 - Mineral materials and products
• Technical Committee: CEN/TC 154 - Aggregates
• Drafting Committee: CEN/TC 154/SC 6 - Test methods
• Current Stage: 5060 - Closure of Vote - Formal Approval
• Start Date: 14-Sep-2012
• Due Date: 05-May-2013
• Completion Date: 14-Sep-2012
• Ref Project: SIST EN 1744-1:2010/kprA1:2012 - Tests for chemical properties of aggregates - Part 1: Chemical analysis

Relations

• Merged Into: EN 1744-1:2009+A1:2012 - Tests for chemical properties of aggregates - Part 1: Chemical analysis
• Effective Date: 19-Jan-2023
• Amends: EN 1744-1:2009 - Tests for chemical properties of aggregates - Part 1: Chemical analysis
• Effective Date: 27-Aug-2011

Standards Content (Sample)

SLOVENSKI STANDARD
01-september-2012
3UHVNXVLNHPLþQLKODVWQRVWLDJUHJDWRYGHO.HPLMVNDDQDOL]D
Tests for chemical properties of aggregates - Part 1: Chemical analysis
Prüfverfahren für chemische Eigenschaften von Gesteinskörnungen - Teil 1: Chemische
Analyse
Essais visant à déterminer les propriétés chimiques des granulats - Partie 1: Analyse
chimique
Ta slovenski standard je istoveten z: EN 1744-1:2009/FprA1
ICS:
71.040.40 Kemijska analiza Chemical analysis
91.100.15 Mineralni materiali in izdelki Mineral materials and
products
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
FINAL DRAFT
EN 1744-1:2009
NORME EUROPÉENNE
EUROPÄISCHE NORM
FprA1
June 2012
ICS 91.100.15
English Version
Tests for chemical properties of aggregates - Part 1: Chemical
analysis
Essais visant à déterminer les propriétés chimiques des Prüfverfahren für chemische Eigenschaften von
granulats - Partie 1: Analyse chimique Gesteinskörnungen - Teil 1: Chemische Analyse
This draft amendment is submitted to CEN members for unique acceptance procedure. It has been drawn up by the Technical Committee
CEN/TC 154.
This draft amendment A1, if approved, will modify the European Standard EN 1744-1:2009. If this draft becomes an amendment, CEN
members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for inclusion of this amendment
into the relevant national standard without any alteration.

This draft amendment was established by CEN in three official versions (English, French, German). A version in any other language made
by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has
the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, 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, Turkey and United Kingdom.

Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to
provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and
shall not be referred to as a European Standard.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2012 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 1744-1:2009/FprA1:2012: E
worldwide for CEN national Members.

Foreword
This document (EN 1744-1:2009/FprA1:2012) has been prepared by Technical Committee CEN/TC 154
“Aggregates”, the secretariat of which is held by BSI.
This document is currently submitted to the Unique Acceptance Procedure.

1 Modification to 11.1, Determination of total sulfur content by acid digestion
(Reference method)
Replace the existing text in 11.1 with the following:
"
11.1.1 Principle
An aggregate test specimen is treated with hydrogen peroxide and hydrochloric acid to convert any sulfur
compounds present to sulfates. Any sulfates are precipitated as barium sulfate (BaSO ) and weighed. The
sulfur content is expressed as a percentage by mass of the aggregate.
11.1.2 Sampling
The laboratory sample shall be taken in accordance with the procedures specified in EN 932-1.
The laboratory sample should be representative of the moisture content of the batch.
11.1.3 Preparation of test portion
Reduce the laboratory sample by the procedures specified in EN 932-2 to an amount not less than the mass
specified in Table 1 appropriate to the upper (D) sieve size of the aggregate.
If necessary, dry the sample at a temperature of (110 ± 5) °C.
NOTE Drying at a higher temperature will oxidise any sulfides.
Stepwise crush and reduce the sub-sample to a mass of approximately 20 g and then grind the particles until
they all pass the 125 µm sieve. Take approximately 1 g of this material as the test specimen.
11.1.4 Procedure
Weigh the test portion to the nearest 0,1 mg (m ) into a 400 ml high form beaker (5.2.9). Add 20 ml distilled
water to elutriate, using a glass rod and watch glass. In the fume cupboard, add 10 ml of hydrogen peroxide
(4.6.1) and warm for 30 min below the boiling point.

After the dissolution, add 20 ml hydrochloric acid (1+1) (4.1) and leave the test specimen in a heat bath for
30 min.
Add a small amount of filter paper pulp and warm up the content of the beaker to below the boiling point.
Make the solution alkaline by adding ammonium hydroxide (4.1). Check the alkalinity by using methyl red as
an indicator (4.6.2), or by using a pH-meter (5.2.8). Simmer for 30 s and then filter under gentle suction using
a medium porosity filter paper. Wash the contents of the filter once with a little hot, demineralized water and
reserve the filtrates.
Transfer the paper filter and the particles retained on it into the beaker and dissolve in 5 ml concentrated
hydrochloric acid (4.1) to which has been added 70 ml hot water.
Repeat the procedure above (boil, precipitate, filter and wash) and reject the precipitate if any. Acidify the
combined filtrates and washings (which should be about 220 ml in all) with 1 ml concentrated hydrochloric acid
and bring it to the boil. Boil for (5 ± 0,5) min.
While maintaining the solution at boiling point and stirring vigorously, add drop-by-drop 10 ml of the barium
chloride solution (4.5.2) heated to just below boiling.
Mature, filter and ignite the barium sulfate precipitate as specified in 10.1.5.
Weigh to the nearest 0,1 mg and calculate the mass of precipitate m .
11.1.5 Calculation and expression of results
Calculate the total sulfur content of the aggregate, expressed
...