SIST EN 13450:2003
(Main)Aggregates for railway ballast
Aggregates for railway ballast
This European Standard specifies requirements for natural crushed unbound aggregates for use in construction of railway track. For the purposes of this standard the aggregate is referred to as railway ballast. The necessity for testing for all properties specified in this standard is limited, depending upon the end use of the railway ballast.
Gesteinskörnungen für Gleisschotter
Die vorliegende Europäische Norm legt die Eigenschaften von Gesteinskörnungen für die Verwendung beim Bau von Bahnkörpern fest, die durch Aufbereitung natürlicher oder industriell hergestellter Materialien oder gebrochener ungebundener rezyklierter Gesteinskörnungen gewonnen werden. Für die Zwecke dieser Norm werden die Gesteinskörnungen als Gleisschotter bezeichnet.
Sie enthält Festlegungen für die Bewertung der Konformität von Produkten nach dieser Europäischen Norm.
ANMERKUNG Die Anforderungen dieser Europäischen Norm basieren auf Erfahrungen mit Gesteinskörnungsarten, die sich in der Anwendung bewährt haben. Die Verwendung von Gesteinskörnungen aus Bezugsquellen ohne eine derartige Bewährung, wie z. B. von rezyklierten oder in einem industriellen Prozess entstandenen Gesteinskörnungen, sollte sorgfältig geprüft werden. Derartige Gesteinskörnungen könnten trotz Übereinstimmung mit sämtlichen Anforderungen dieser Europäischen Norm Eigenschaften besitzen, die nicht im Mandat M 125 (in der geänderten Fassung) erfasst sind und die nicht für die Gesamtheit der Gesteinskörnungsarten mit einer bewährten Anwendung gelten. Falls erforderlich, können für die Beurteilung ihrer Eignung die am jeweiligen Verwendungsort geltenden Vorschriften herangezogen werden.
Granulats pour ballasts de voies ferrées
La présente Norme européenne spécifie les caractéristiques des granulats obtenus par traitement de matériaux naturels ou artificiels ou de granulats recyclés concassés utilisés dans la construction de voies ferrées. Pour les besoins de la présente norme, les granulats sont appelés ballasts de voies ferrées.
Elle fournit l'évaluation de conformité des produits.
NOTE Les exigences de la présente Norme européenne sont basées sur l'expérience acquise avec des types de granulats disposant d'un mode d'utilisation établi. Il convient de preter une attention particuliere a l'utilisation de granulats provenant de sources ne présentant pas ce mode d'utilisation, par exemple, les granulats recyclés ou les granulats issus de certains produits industriels dérivés. Il est possible que de tels granulats, dont il convient qu'ils soient conformes a toutes les exigences de la présente Norme européenne, possedent d'autres caractéristiques non incluses dans le mandat M 125 (selon amendement) et qui ne s'appliquent pas a la totalité des types de granulats dotés d'un modele établi d'utilisation. Le cas échéant, les dispositions en vigueur sur le lieu d'utilisation peuvent etre adoptées pour évaluer leur aptitude a l'emploi.
Agregati za grede železniških prog
General Information
Relations
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Aggregates for railway ballastAgregati za grede železniških progGranulats pour ballasts de voies ferréesGesteinskörnungen für Gleisschotter91.100.15Mineralni materiali in izdelkiMineral materials and productsICS:SIST EN 13450:2003enTa slovenski standard je istoveten z:EN 13450:200201-marec-2003SIST EN 13450:2003SLOVENSKI
STANDARD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 13450December 2002ICS 91.100.15English versionAggregates for railway ballastGranulats pour ballasts de voies ferréesGesteinskörnungen für GleisschotterThis European Standard was approved by CEN on 7 November 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 13450:2002 E
EN 13450:2002 (E)2ContentspageForeword.31Scope.42Normative references.43Terms and definitions.54Sampling.55Production.66Geometrical requirements.67Physical requirements.98Harmful components.109Evaluation of conformity.1110Designation and description.1111Marking and labelling.12Annex A (informative)
Sampling railway ballast at the construction site either from a railway wagon orfrom the track.13Annex B (informative)
Guidance on interpretation of results when samples of railway
ballast havebeen taken from railway wagon or from track.16Annex C (normative)
Conditions to be applied to the test procedure specified in EN 1097-2 for testingthe Los Angeles coefficient of railway ballast (see 7.2).17Annex D (normative)
Conditions to be applied to the test procedure specified in EN 1097-2 for testingthe impact value of railway ballast (see 7.2).18Annex E (normative)
Conditions to be applied to the test procedure specified in EN 1097-1 fordetermination of the resistance to wear (micro-Deval) of railway ballast (see 7.3).19Annex F (normative)
Conditions to be applied to the test procedure specified in EN 1367-1 fordetermination of the resistance to freezing and thawing of railway ballast (see 7.4).20Annex G (normative)
Conditions to be applied to the test procedure specified in EN 1367-2 for thedetermination of the resistance of railway ballast to the
magnesium sulfate test (see 7.4).21Annex H (informative)
Guidance on the freezing and thawing resistance of railway ballast.22Annex I (normative)
Factory production control.24Annex ZA (informative)
Clauses of this European Standard addressing essential requirements or otherprovisions of EU Directives.29
EN 13450:2002 (E)3ForewordThis document EN 13450:2002 has been prepared by Technical Committee CEN /TC 154, "Aggregates", thesecretariat 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 orby endorsement, at the latest by June 2003, and conflicting national standards shall be withdrawn at the latest byJune 2004.This document has been prepared under a mandate given to CEN by the European Commission and the EuropeanFree Trade Association, and supports essential requirements of EU Directive(s).For relationship with EU Directive(s), see informative annex ZA, which is an integral part of this document.Requirements for other end uses of aggregates will be specified in the following European Standards:EN 12620Aggregates for concrete.EN 13043Aggregates for bituminous mixtures and surface treatments for roads, airfields and other traffickedareas.EN 13055-1Lightweight aggregates - Part 1: Lightweight aggregates for concrete, mortar and grout.prEN 13055-2Lightweight aggregates - Part 2: Lightweight aggregates for bituminous mixtures and surface
treatments and for bound and unbound applications, excluding concrete, mortar and grout.EN 13139Aggregates for mortar.EN 13242Aggregates for unbound and hydraulically bound materials for use in civil engineeringwork and road construction.EN 13383-1Armourstone - Part 1: specification.Annexes A, B and H are informative and annexes C, D, E, F, G and I are normative.According to the CEN/CENELEC Internal Regulations, the national standards organizations of the followingcountries are bound to implement this European Standard : Austria, Belgium, Czech Republic, Denmark, Finland,France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain,Sweden, Switzerland and the United Kingdom.
EN 13450:2002 (E)41 ScopeThis European Standard specifies the properties of aggregates obtained by processing natural or manufacturedmaterials or recycled crushed unbound aggregates for use in construction of railway track.
For the purposes of thisstandard, the aggregate is referred to as railway ballast.It provides for the evaluation of conformity of the products to this European Standard.NOTE The requirements in this European Standard are based upon experience with aggregate types with an establishedpattern of use.
Care should be taken when considering the use of aggregates from sources with no such pattern of use, e.g.,recycled aggregates and aggregates arising from certain industrial by-products.
Such aggregates, that should comply with allthe requirements of this European Standard, could have other characteristics not included in Mandate M 125 (as amended) thatdo not apply to the generality of aggregate types with an established pattern of use and when required, provisions valid at theplace of use can be used to assess their suitability.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 932-1:1996,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 932-3,Tests for general properties of aggregates — Part 3: Procedure and terminology for simplifiedpetrographic description.EN 932-5,Tests for general properties of aggregates — Part 5: Common equipment and calibration.EN 933-1:1997,Tests for geometrical properties of aggregates — Part 1: Determination of particle sizedistribution - Sieving method.EN 933-3,Tests for geometrical properties of aggregates — Part 3: Determination of particle shape- Flakiness index.EN 933-4,Tests for geometrical properties of aggregates — Part 4: Determination of particle shape- Shape index.EN 1097-1:1996,Tests for mechanical and physical properties of aggregates - Part 1: Determination of theresistance to wear (micro-Deval).EN 1097-2:1998,Tests for mechanical and physical properties of aggregates — Part 2: Methods for thedetermination of resistance to fragmentation.EN 1097-6:2000,Tests for mechanical and physical properties of aggregates — Part 6: Determination of particledensity and water absorption.EN 1367-1:1999,Tests for thermal and weathering properties of aggregates — Part 1: Determination of resistanceto freezing and thawing.EN 1367-2:1998,Tests for thermal and weathering properties of aggregates — Part 2: Magnesium sulfate test.EN 1367-3,Tests for thermal and weathering properties of aggregates — Part 3: Boiling test for“Sonnenbrand basalt”.
EN 13450:2002 (E)53 Terms and definitionsFor the purposes of this European Standard the following terms and definitions apply.3.1aggregategranular material used in construction. Aggregate may be natural, manufactured or re-cycled3.2railway ballastaggregate where 100 % of the surface of the particles can be described as totally crushed used in the constructionof railway track3.3natural railway ballastaggregate for railway ballast from mineral sources which have been subjected to nothing more than mechanicalprocessing3.4manufactured railway ballastrailway ballast (of mineral origin) resulting from an industrial process involving thermal or other modifications3.5recycled railway ballastrailway ballast resulting from the processing of previously used railway ballast3.6railway ballast sizedesignation of railway ballast in terms of lower (d) and upper (D) sieve sizes. This designation accepts thepresence of some particles which will be retained on the upper sieve (oversize) and some will pass the lower sieve(undersize)3.7fine particlesparticle size fraction of railway ballast which passes the 0,5 mm sieve3.8finesparticle size fraction of railway ballast which passes the 0,063 mm sieve3.9categorylevel of a property of an aggregate expressed as a range of values or a limiting valueNOTEThere is no relationship between the categories of different properties.4 SamplingSampling shall be carried out in accordance with EN 932-1.NOTE 1Advice on sampling from a wagon or the track at the laying site is given in annex A.NOTE 2Guidance on interpretation of results when samples of railway ballast have been taken from railway wagon or out oftrack is given in annex B.
EN 13450:2002 (E)65 ProductionNatural railway ballast shall be produced without blending material from different geological sources.6 Geometrical requirements6.1 GeneralThe necessity for testing and declaring all properties specified in this clause shall be limited according to the particularapplication at end use or origin of the aggregate.
When required, the tests specified shall be carried out to determineappropriate properties.NOTE 1When the value of a property is required but not defined by specified limits the value should be declared by theproducer as an XXDeclared category, e.g., in Table 4 a value of flakiness index of say 40 corresponds to FI40 (Declared value).NOTE 2When a property is not required, a “No requirement” category can be used.NOTE 3Guidance on selection of appropriate categories for specific applications can be found in national provisions in theplace of use of the railway ballast.6.2 Railway ballast sizeRailway ballast size shall be designated by a pair of sieve sizes in millimetre with d as the lower limit designationsieve and D as the upper limit designation sieve between which most of the particle size distribution lies.For railway ballast D is 50 mm or 63 mm and d is 31,5 mm.6.3 GradingThe grading of the railway ballast determined in accordance with EN 933-1 shall be declared in accordance withthe relevant category specified in Table 1.Table 1 — Categories for gradingRailway ballast size 31,5 mm to 50 mmRailway ballast size 31,5 mm to 63 mmPercentage passing by massGrading categorySieve sizemmABCDEF8063504031,522,431,5 to 5031,5 to 6310010070 to 9930 to 651 to 250 to 3 50-10097 to 10070 to 9930 to 701 to 250 to 3 50-10095 to 10070 to 9925 to 751 to 250 to 3 50-10097 to 9965 to 9930 to 651 to 250 to 3- 5010095 to 9955 to 9925 to 751 to 250 to 3- 5010093 to 9945 to 7015 to 400 to 70 to 7-³ 85NOTE 1
The requirement for passing the 22,4 mm sieve applies to railway ballast sampled at the place of production.NOTE 2
In certain circumstances a 25 mm sieve may be used as an alternative to the 22,4 mm sieve when a tolerance of0 to 5 would apply (0 to 7 for category F).6.4 Fine particlesThe content of fine particles determined in accordance with EN 933-1 shall be declared in accordance with therelevant category specified in Table 2.
EN 13450:2002 (E)7Table 2 — Categories for fine particles contentMaximum percentage passing by massSievesizeFine particle categorymmABDeclaredC0,50,61,0> 1,0No requirementNOTE
The requirement applies to railway ballast sampled at the place of production.6.5 FinesThe fines content determined in accordance with EN 933-1 shall be declared in accordance with the relevantcategory specified in Table 3.When required cleanliness shall be assessed from the fines content. Fines shall be considered non-harmful if thetotal fines content is less than the relevant category specified in Table 3 in accordance with the provisions valid inthe place of use of the aggregate.Table 3 — Categories for fines contentMaximum percentage passing by massSievesizeFines content categorymmABCDeclaredD0,0630,51,01,5> 1,5No requirementNOTE
The requirement applies to railway ballast sampled at the place of production.6.6 Particle shape6.6.1 Flakiness indexWhen required the shape of coarse railway ballast shall be determined in terms of the flakiness index as specifiedin EN 933-3.Flakiness index shall be the reference test for the determination of shape of railway ballast. The Flakiness indexshall be declared in accordance with the relevant category specified in Table 4.
EN 13450:2002 (E)8Table 4 — Categories for maximum values of flakiness indexFlakiness IndexCategoryFI 15 20 35> 35FI15FI20FI35FIDeclaredNo requirementFINR6.6.2 Shape indexWhere required, the shape index of the railway ballast determined in accordance with EN 933-4 shall be declaredin accordance with the relevant category specified in Table 5.Table 5 — Categories for maximum values of shape indexShape IndexCategorySI 10 20 305 to 30> 30SI10SI20SI30SI5/30
SIDeclaredNo requirementSINR6.7 Particle lengthParticle length shall be assessed by measuring with an appropriate gauge or calipers.NOTELimits should be selected from the specified range until such a time as there is more data available on aggregateproperties related to performance.When required, the particle length shall be declared in accordance with the relevant category specified in Table 6.Table 6 — Categories for particle lengthPercentage by mass with length
100 mm in agreater than 40 kg sampleParticle length categoryABCDDeclaredE46812> 12No requirement
EN 13450:2002 (E)97 Physical requirements7.1 GeneralThe necessity for testing and declaring all properties specified in this clause shall be limited according to the particularapplication at end use or origin of the aggregate. When required, the tests specified shall be carried out to determineappropriate properties.NOTE 1When the value of a property is required but not defined by specified limits the value should be declared by theproducer as an XXDeclared category, e.g., in Table 6 a Los Angeles coefficient of say 30 corresponds toLARB 30(Declared value).NOTE 2When a property is not required, a “No requirement” category can be used.NOTE 3Guidance on selection of approriate categories for specific applications can be found in national provisions in theplace of use of the railway ballast.7.2 Resistance to fragmentationWhen required, the resistance to fragmentation of railway ballast (Los Angeles coefficient, LARB, using theconditions as specified in annex C), determined as specified in EN 1097-2:1998, clause 5, shall be declared inaccordance with the relevant category specified in Table 7. The Los Angeles test method shall be the referencetest for the determination of resistance to fragmentation of railway ballast.Table 7 — Categories for maximum values of Los Angeles coefficientLos Angeles coefficientCategoryLARB 12 14 16 20 24> 24LARB 12LARB 14LARB 16LARB 20LARB 24
LARB DeclaredNo requirementLARB NRWhere required, the impact value of railway ballast (SZRB, using the conditions as specified in annex D),determined in accordance with EN 1097-2:1998, clause 6, shall be declared in accordance with the relevantcategory specified in Table 8.Table 8 — Categories for maximum values of resistance to impactImpact value%CategorySZRB 14 18 22> 22SZRB 14SZRB 18SZRB 22
SZRB DeclaredNo requirementSZRB NR
EN 13450:2002 (E)107.3 Resistance to wearWhen required, the resistance to wear of railway ballast (micro-Deval coefficient, MDE RB using the conditions asspecified in annex E) determined in accordance with EN 1097-1, shall be declared in accordance with the relevantcategory specified in Table 9.Table 9 — Categories for maximum values of resistance to wearmicro-Deval coefficientCategoryMDE RB 5 7 11 15> 15MDE RB 5MDE RB 7MDE RB 11MDE RB 15
MDE RB DeclaredNo requirementMDE RB NR7.4 Durability7.4.1 Resistance to freezing and thawingWhen required, the durability of railway ballast in terms of freeze/thaw resistance, shall be assessed by either thefreeze/thaw test in accordance with EN 1367-1, using the conditions as specified in annex F, or the magnesium sulphatesoundness test in accordance with EN 1367-2, using the conditions as specified in annex G and the results declared.NOTEThere is limited experience of the use of either of these tests for assessing the durability of railway ballast.
Advice onthe applicability of the test methods and of using water absorption as a screening test is given in annex H.7.4.2 Particle densityWhen required the particle density shall be determined in accordance with EN 1097-6:2000, annex B and the resultsdeclared.7.4.3 Water absorptionWhen required the water absorption shall be determined in accordance with EN 1097-6:2000 annex B and the resultsdeclared.7.5 SonnenbrandIf signs of "Sonnenbrand" are known from a quarry of basalt or closely related rocks qualitative testing shall be carriedout in accordance with EN 1367-3 and the results declared.NOTE"Sonnenbrand" is a type of rock decay that can be present in some basalts and manifests itself under the influenceof atmospheric conditions. It starts with the appearance of grey/white coloured spots.
Usually hairline cracks are generatedradiating out from the spots and interconnecting them.
This reduces the strength of the mineral fabric, and as a result the rockdecays to small particles.
Depending on the source this process can take place within months of extraction or extend overseveral decades.
In exceptional cases a rapid decay results in the formation of large cracks and the breaking of aggregateparticles.8 Harmful componentsRailway ballast shall not contain other components or matter than specified in this standard.
EN 13450:2002 (E)119 Evaluation of conformity9.1 GeneralThe producer shall undertake initial type tests (see 9.2) and Factory Production Control (see annex I) to ensure thatthe product conforms to this European Standard and to declared values as appropriate.9.2 Initial type testsInitial type tests relevant to the intended end use shall be carried out to check compliance with specifiedrequirements in the following circumstances:a)
a new source of aggregates is to be used.b)
there is a major change in the nature of the raw materials or in the processing conditions which may affect
the properties of the aggregates.The results of the initial tests shall be documented as the starting point of the factory production control for thatmaterial.
This shall particularly include the identification of any components likely to emit radiation above normalbackground levels, any components likely to release polyaromatic carbons or other dangerous substances.
If thecontent of any of these components exceeds the limits in force according to the provisions valid in the place of useof the railway ballast, the results of the initial tests shall be declared9.3 Factory production controlThe producer shall have in place a system of factory production control that complies with the requirements ofannex I.The records held by the producer shall indicate what quality control procedures are in operation during theproduction of the aggregate.NOTE 1The form of control applied to any aggregate depends upon its intended use and the regulations relating to that use.NOTE 2For inspection purposes only, railway ballast can be sampled from the track in accordance with annex A.10 Designation and description10.1 DesignationRailway ballast shall be identified in the following terms:a) source - if the material has been re-handled in a depot both source and depot shall be given;b) a simple indication of the petrographic type (see EN 932-3);c) railway ballast size;d) where required a producer's code to relate the designation to the description;e) any additional information needed to identify the particular railway ballast aggregate.10.2 Essential information for the description of a railway ballast aggregateOnly the items a) to c) in 10.1 are essential descriptions of a railway ballast aggregate.
The necessity for otherinformation depends on the situation and end use.NOTEThe purchaser should inform the supplier at the time of order of any special requirements associated with a particularend use.
EN 13450:2002 (E)1211 Marking and labellingThe delivery ticket shall contain at least the following information:a) designation;b) date of despatch;c) serial number of the ticket;d) the number of this European Standard.NOTEIt can be a requirement of the supply agreement to have additional information included on the delivery ticket.
EN 13450:2002 (E)13Annex A (informative)Sampling railway ballast at the construction site either from a railway wagon or from thetrackA.1 IntroductionIt is intended that for compliance purposes railway ballast should be sampled only at the place of production.
Thespecification limits contained within this standard are based on the testing of samples taken at this location.
Themethod of sampling should be as specified in EN 932-1.However there will be occasions when it will be necessary to take a sample of railway ballast at the time of deliveryor from the track. Reasons can include to check if degradation has occurred during transport or to investigate aparticular track problem. In such situations one of the following sampling procedures should be adopted.A.2 Sampling railway ballast from a railway wagonA.2.1
Sampling of railway ballast at a construction site should be carried out in accordance with the principles anddefinitions specified in EN 932-1.A.2.2
Sampling should only be carried from a fully loaded wagon by use of a sampling box (see EN 932-1:1996,Figure 5) of inner dimensions length 700 mm, width 450 mm and height 250 mm.A.2.3
All the increments for one bulk sample should be taken from one wagon and from one discharge opening(slide or conveyor belt) of that wagon.A.2.4
A minimum of four increments should be taken.A.2.5
The first increment should be taken about 10 s after the commencement of unloading, the last increment about10 s before the end of unloading and intermediate increments at regular intervals in between the first and last.A.2.6
The discharge opening should be completely open at the time of sampling.A.2.7
The wagon should move at walking pace (about 3 km/h) over the sampling box.A.2.8
The contents of one sample box should constitute one increment.A.2.9
The increments should be mixed together to form a bulk sample on a clean flat surface or on a thick tearresistant plastic sheet.A.2.10
The bulk sample should be split into the required number of subsamples in accordance with EN 932-1.A.3 Sampling railway ballast from track without use of a steel frameA.3.1
The bulk sample should consist of one or more spaces between sleepers.A.3.2
If it is required to sample railway ballast from more than one space between sleepers then the first, fourth andthen every third space should be sampled.A.3.3 The railway ballast should be removed completely first by using a ballast fork and then a small shovel or similar.A.3.4
The railway ballast should be removed down to the bottom of the railway ballast layer. Care should be taken toensure that no damage is caused to the formation or the protective layer and that no particles originating from themare included in the sample.
EN 13450:2002 (E)14A.3.5
The increments should be mixed together to form a bulk sample on clean, flat surface or on thick tear-resistant plastic sheet.A.3.6
The bulk sample should be split into the required number of subsamples, in accordance with EN 932-1.A.4 Sampling railway ballast from track using a steel frameA.4.1
A steel frame serrated at its lower edge, as shown in Figure A.1, can be used for railway ballast samplingfrom the track.Dimensions in millimetres83003201005502020A-AAA122020Key1Welding seam2Steel plateFigure A.1 - Frame for sampling railway ballastA.4.2
The sampling procedure should be as described in A.3 except that at each space between sleepers fromwhich it is required to take a sample, the steel frame should be driven into the railway ballast using a sledgehammer.
The steel frame should be driven between concrete sleepers without damaging the sleepers.
EN 13450:2002 (E)15A.4.3
Railway ballast should be removed first with a ballast fork and the frame then driven deeper into the railwayballast. Removal of the bottom layer of railway ballast should be with a small shovel or similar. Care should be takento ensure that no damage is caused to the formation or the protective layer and that no particles originating fromthem are included in the sample.A.4.4
The increments should be mixed together to form a bulk sample on a clean, flat surface or thick tear-resistantplastic sheet.A.4.5
The bulk sample should be split into the required number of subsamples, in accordance with EN 932-1.
EN 13450:2002 (E)16Annex B (informative)Guidance on interpretation of results when samples of railway ballast have been taken from railway wagon or from trackB.1For assessment of compliance with specification samples should be taken at the place of production inaccordance with EN 932-1, tested in accordance with the test methods detailed in this standard and compared withthe appropriate specified values.B.2There will however be some occasions when samples are taken from a railway wagon or from the track. Insuch cases the same test methods and appropriate specified values should apply with the exception of certain testmethods which can be used to assess if degradation of the railway ballast has occurred in transport.B.3For these tests, the results obtained from samples taken from a railway wagon or from the track should becompared with the limits given in Table B.1 and provided these are not exceeded the degradation of the railwayballast during transport or by attrition may be considered acceptable.B.4Results of sample, which are taken from the railway track before tamping, are for information purposes andto form the basis of discussion between the supplier and the customer.Table B.1 — Degradation of railway ballast during transportCategoryTest clauseDescriptionABC6.2Maximum percentage bymass passing 22,4 mm sieve57No requirement
EN 13450:2002 (E)17Annex C (normative)Conditions to be applied to the test procedure specified in EN 1097-2for testing the Los Angeles coefficient of railway ballast (see 7.2)C.1 GeneralThe test shall be carried out as specified in EN 109
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