Tests for mechanical and physical properties of aggregates - Part 2: Methods for the determination of resistance to fragmentation

This document describes the reference method, the Los Angeles test, used for type testing and in case of dispute (and an alternative method, the impact test) for determining the resistance to fragmentation of coarse aggregates (main text) and aggregates for railway ballast (Annex A). For other purposes, in particular factory production control, other methods are possible provided that an appropriate working relationship with the reference method has been established.
This document applies to natural, manufactured or recycled aggregates used in building and civil engineering.
Annex A describes a method for the determination of resistance to fragmentation of aggregates for railway ballast.
Annex B gives alternative narrow range classifications for the Los Angeles test and the impact test.
Annex C contains construction, operation and safety requirements for the impact tester.
Annex D describes a method for checking of the impact tester.
Annex E gives precision data.
Annex F contains a worked example of calculation of impact value SZ.
Annex G gives an alternative narrow range classification for the Los Angeles test of 16/32 mm recycled aggregates.
Annex H proposes an additional sieve for the evaluation of the Los Angeles test for railway ballast.
Annex A is normative and Annexes B to H are informative.

Prüfverfahren für mechanische und physikalische Eigenschaften von Gesteinskörnungen - Teil 2: Verfahren zur Bestimmung des Widerstandes gegen Zertrümmerung

Dieses Dokument legt das Referenzverfahren; das Los-Angeles-Prüfverfahren; das für die Erstprüfung und in Streitfällen zur Bestimmung des Widerstandes gegen Zertrümmerung von groben Gesteinskörnungen (Haupttext) und Gesteinskörnungen für Gleisschotter (Anhang A) verwendet wird (sowie den Schlagversuch als alternatives Verfahren), fest. Für andere Zwecke, speziell im Rahmen der werkseigenen Produktionskontrolle, sind auch andere Verfahren möglich, sofern ein ausreichender Zusammenhang zum Referenzverfahren nachgewiesen wurde.
Dieses Dokument wird angewendet für natürliche, industriell hergestellte oder rezyklierte Gesteins-körnungen, die im Bauwesen eingesetzt werden.
Anhang A beschreibt ein Verfahren zur Bestimmung des Widerstandes gegen Zertrümmerung von Gesteinskörnungen für Gleisschotter.
Anhang B beschreibt alternative enge Kornklassen für das Los-Angeles-Prüfverfahren und den Schlagversuch.
Anhang C umfasst Aufbau, Betrieb und Sicherheitsanforderungen für das Schlagprüfgerät.
Anhang D beschreibt ein Verfahren zur Prüfung des Schlagprüfgeräts.
Anhang E enthält Daten zur Präzision.
Anhang F enthält ein ausgearbeitetes Beispiel zur Berechnung des Schlagzertrümmerungswertes SZ.
Anhang G beschreibt eine alternative enge Kornklasse für das Los-Angeles-Prüfverfahren von rezyklierten Gesteinskörnungen der Kornklasse 16/32 mm.
Anhang H beschreibt ein zusätzliches Sieb zur Bewertung des Los-Angeles-Prüfverfahrens für Gleisschotter.
Anhang A ist normativ, während die Anhänge B bis H informativer Natur sind.

Essais pour déterminer les caractéristiques mécaniques et physiques des granulats - Partie 2 : Méthodes pour la détermination de la résistance à la fragmentation

Le présent document décrit la méthode de référence, l’essai Los Angeles, utilisée pour les essais de type initiaux et en cas de litige (et une autre méthode, l’essai de fragmentation par impact) pour déterminer la résistance à la fragmentation d’un gravillon (texte principal) et des granulats pour ballast ferroviaire (Annexe A). À d’autres fins, en particulier pour le contrôle de la production en usine, d’autres méthodes sont envisageables, sous réserve qu’une corrélation appropriée avec la méthode de référence ait été établie.
Le présent document s’applique aux granulats naturels, artificiels ou recyclés utilisés dans le Bâtiment et les Travaux Publics.
L’Annexe A décrit une méthode de détermination de la résistance à la fragmentation des granulats utilisés pour le ballast ferroviaire.
L’Annexe B donne d’autres possibilités de classes granulaires pour l’essai Los Angeles et l’essai de fragmentation par impact.
L’Annexe C donne des exigences en matière de construction, de fonctionnement et de sécurité pour la machine de fragmentation par impact.
L’Annexe D décrit un procédé de contrôle de la machine de fragmentation par impact.
L’Annexe E fournit des données sur la fidélité.
L’Annexe F donne un exemple concret de calcul de la valeur de fragmentation par impact SZ.
L’Annexe G donne d’autres possibilités de classes granulaires pour l’essai Los Angeles appliqué aux granulats recyclés  16/32 mm.
L’Annexe H propose un tamis supplémentaire pour l’essai Los Angeles appliqué au ballast ferroviaire.
L’Annexe A est normative et les Annexes B à H sont informatives.

Preskusi mehanskih in fizikalnih lastnosti agregatov - 2. del: Metode določevanja odpornosti proti drobljenju

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Status
Published
Publication Date
14-Apr-2020
Withdrawal Date
30-Oct-2020
Current Stage
6060 - Definitive text made available (DAV) - Publishing
Start Date
15-Apr-2020
Due Date
25-Mar-2020
Completion Date
15-Apr-2020

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SLOVENSKI STANDARD
01-julij-2020
Nadomešča:
SIST EN 1097-2:2010
Preskusi mehanskih in fizikalnih lastnosti agregatov - 2. del: Metode določevanja
odpornosti proti drobljenju
Tests for mechanical and physical properties of aggregates - Part 2: Methods for the
determination of resistance to fragmentation
Prüfverfahren für mechanische und physikalische Eigenschaften von Gesteinskörnungen
- Teil 2: Verfahren zur Bestimmung des Widerstandes gegen Zertrümmerung
Essais pour déterminer les caractéristiques mécaniques et physiques de granulats -
Partie 2 : Méthodes pour la détermination de la résistance à la fragmentation
Ta slovenski standard je istoveten z: EN 1097-2:2020
ICS:
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.

EN 1097-2
EUROPEAN STANDARD
NORME EUROPÉENNE
April 2020
EUROPÄISCHE NORM
ICS 91.100.15 Supersedes EN 1097-2:2010
English Version
Tests for mechanical and physical properties of aggregates
- Part 2: Methods for the determination of resistance to
fragmentation
Essais pour déterminer les caractéristiques Prüfverfahren für mechanische und physikalische
mécaniques et physiques de granulats - Partie 2 : Eigenschaften von Gesteinskörnungen - Teil 2:
Méthodes pour la détermination de la résistance à la Verfahren zur Bestimmung des Widerstandes gegen
fragmentation Zertrümmerung
This European Standard was approved by CEN on 24 February 2020.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC 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
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, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 1097-2:2020 E
worldwide for CEN national Members.

Contents Page
European foreword . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 7
4 Apparatus . 8
4.2 Additional apparatus required for determination of resistance to
fragmentation by the Los Angeles test method . 8
4.3 Additional apparatus required for determination of resistance to
fragmentation by the impact test method . 10
5 Determination of resistance to fragmentation by the Los Angeles test
method . 10
5.1 Principle . 10
5.2 Preparation of test portion . 10
5.3 Test procedure . 11
5.4 Calculation and expression of results . 11
5.5 Test report . 12
6 Determination of resistance to fragmentation by the impact test method . 12
6.1 Principle . 12
6.2 Preparation of test specimens . 12
6.3 Test procedure . 13
6.4 Calculation and expression of results . 13
6.5 Test report . 14
Annex A (normative) Determination of resistance to fragmentation of aggregates
for railway ballast . 15
A.1 Apparatus . 15
A.2 Determination of resistance to fragmentation by the Los Angeles test
method . 17
A.3 Determination of resistance to fragmentation by the impact test method . 19
Annex B (informative) Alternative narrow range classifications . 22
B.1 Los Angeles test . 22
B.2 Impact test . 22
Annex C (informative) The impact tester: Construction, operation and safety
requirements . 24
C.1 General . 24
C.2 Construction . 24
C.3 Lifting device . 25
C.4 Sample holder . 25
C.5 Anvil . 26
C.6 Base plate and dampers . 27
C.7 Safety requirements and testing . 27
C.8 Checking of impact tester . 27
Annex D (informative) Checking of the impact tester . 36
D.1 Scope and field of application . 36
D.2 Checklist . 36
D.3 Apparatus and test agents . 36
D.4 Procedure . 36
Annex E (informative) Precision . 38
E.1 General . 38
E.2 Los Angeles test . 38
E.3 Impact test . 38
Annex F (informative) Worked example of calculation of impact value SZ . 40
Annex G (informative) Alternative narrow range classification for the Los Angeles
test of 16/32 mm recycled aggregates . 41
Annex H (informative) Additional sieve for evaluation of the Los Angeles test for
railway ballast . 42
Bibliography . 43

European foreword
This document (EN 1097-2:2020) has been prepared by Technical Committee CEN/TC 154
“Aggregates”, the secretariat of which is held by BSI.
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 October 2020, and conflicting national
standards shall be withdrawn at the latest by October 2020.
Attention is drawn to the possibility that some of the elements of this document may be the
subject of patent rights. CEN shall not be held responsible for identifying any or all such patent
rights.
This document supersedes EN 1097-2:2010.
The main technical changes compared to EN 1097-2:2010 are the following:
— All annexes are presented in the Scope.
— The definition of LA has been added in Clause 3.
RB
— Reference to the test sieves in Annex B has been added in Table 1.
— Guard sieves are introduced in 4.1 General apparatus.
— Figure 1 describing a typical Los Angeles testing machine has been modified.
— Notes with normative text have been transformed into main text (Note in 4.2.2.1, Note 3 in
5.2 and Note in 6.2.2).
— Explanations about ball load have been added as notes in 4.2.2.2.
— The test procedure in 5.3 has been clarified.
— The texts about masses in 6.2.4 and 6.3.4 have been clarified.
— Annex A is completed to contain full text, not only the clauses expressing additions or
modifications to main text clauses.
— The text about ball load in A.1.2.2 has been completed.
— The test procedure for aggregates for railway ballast has been completed (A.2.3).
— Formula (A.1) has been changed.
— The test report content has been adopted to the current rules (5.5, 6.5, A.2.5 and A.3.5).
— The principle and the test procedure for impact test of aggregates for railway ballast have
been completed (A.3.1 and A.3.3).
— Annex B has been modified to include both LA test and impact test and is completed with
alternative narrow range classifications for the impact test.
— The texts about determination of impact effect have been removed (D.3.2, D.4.7 and the last
point of the checklist in D.2).
— A new Annex H with an additional sieve for evaluation of the Los Angeles test for railway
ballast is added.
— The Bibliography is supplemented.
— All references (except for the normative) are dated.
This European standard forms part of a series of tests for mechanical and physical properties of
aggregates. Test methods for other properties of aggregates are covered by the following
European standards:
— EN 932, Tests for general properties of aggregates
— EN 933, Tests for geometrical properties of aggregates
— EN 1367, Tests for thermal and weathering properties of aggregates
— EN 1744, Tests for chemical properties of aggregates
— EN 13179, Tests for filler aggregate used in bituminous mixtures
EN 1097 consists of the following parts, under the general title Tests for mechanical and physical
properties of aggregates:
— Part 1: Determination of the resistance to wear (micro-Deval)
— Part 3: Determination of loose bulk density and voids
— Part 4: Determination of the voids of dry compacted filler
— Part 5: Determination of the water content by drying in a ventilated oven
— Part 6: Determination of particle density and water absorption
— Part 7: Determination of the particle density of filler — Pyknometer method
— Part 8: Determination of the polished stone value
— Part 9: Method for the determination of the resistance to wear by abrasion from studded
tyres — Nordic test
— Part 10: Water suction height
— Part 11: Determination of compressibility and confined compressive strength of lightweight
aggregates
According to the CEN-CENELEC Internal Regulations, the national standards organisations of the
following countries are bound to implement this European Standard: 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, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden,
Switzerland, Turkey and the United Kingdom
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