BS EN 12697-34:2012 BSI Standards Publication Bituminous mixtures — Test methods for hot mix asphalt Part 34: Marshall test BS EN 12697-34:2012 BRITISH STANDARD National foreword This British Standard is the UK implementation of EN 12697-34:2012 It supersedes BS EN 12697-34:2004 which is withdrawn The UK participation in its preparation was entrusted to Technical Committee B/510/1, Asphalt products A list of organizations represented on this committee can be obtained on request to its secretary This publication does not purport to include all the necessary provisions of a contract Users are responsible for its correct application The British Standards Institution 2012 Published by BSI Standards Limited 2012 ISBN 978 580 76364 ICS 93.080.20 Compliance with a British Standard cannot confer immunity from legal obligations This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 August 2012 Amendments issued since publication Date Text affected BS EN 12697-34:2012 EN 12697-34 EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM May 2012 ICS 93.080.20 Supersedes EN 12697-34:2004+A1:2007 English Version Bituminous mixtures - Test methods for hot mix asphalt - Part 34: Marshall test Mélanges bitumineux - Méthodes d'essai pour mélange hydrocarboné chaud - Partie 34 : Essai Marshall Asphalt - Prüfverfahren für Heißasphalt - Teil 34: MarshallPrüfung This European Standard was approved by CEN on 30 March 2012 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, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom 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 worldwide for CEN national Members Ref No EN 12697-34:2012: E BS EN 12697-34:2012 EN 12697-34:2012 (E) Contents Page Foreword Scope Normative references Terms and definitions 7 Principle Apparatus .8 6.1 6.2 Procedure .8 Specimen preparation 8 Test procedure .9 Expression of results Test report 10 Precision 10 Annex A (normative) Marshall stability and flow values 11 Annex B (normative) Testing head 12 Bibliography 13 BS EN 12697-34:2012 EN 12697-34:2012 (E) Foreword This document (EN 12697-34:2012) has been prepared by Technical Committee CEN/TC 227 “Road materials”, the secretariat of which is held by DIN 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 November 2012, and conflicting national standards shall be withdrawn at the latest by November 2012 Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights This document supersedes EN 12697-34:2004+A1:2007 The significant changes with respect to the previous edition are: a) definition of stability revised; b) definition of total flow added; c) note added on need for graphical plotter; d) note added allowing alternative number of votes; e) staking of specimens not permitted; f) note added about rapid cooling of rolled asphalt specimens; g) requirements for measurement of flow revised; h) equation for calculating the corrected stability revised with units in cubic millimetres rather than millilitres; i) calculation of flow clarified; j) Annex A revised Annexes A and B are normative This document is one of a series of European Standards which specify various test methods for bituminous mixtures It includes the following parts: EN 12697-1, Bituminous mixtures — Test methods for hot mix asphalt — Part 1: Soluble binder content EN 12697-2, Bituminous mixtures — Test method for hot mix asphalt — Part 2: Determination of particle size distribution EN 12697-3, Bituminous mixtures — Test methods for hot mix asphalt — Part 3: Bitumen recovery: Rotary evaporator EN 12697-4, Bituminous mixtures — Test methods for hot mix asphalt — Part 4: Bitumen recovery: Fractionating column EN 12697-5, Bituminous mixtures — Test methods for hot mix asphalt — Part 5: Determination of the maximum density BS EN 12697-34:2012 EN 12697-34:2012 (E) EN 12697-6, Bituminous mixtures — Test methods for hot mix asphalt — Part 6: Determination of bulk density of bituminous specimens EN 12697-7, Bituminous mixtures — Test methods for hot mix asphalt — Part 7: Determination of bulk density of bituminous specimens by gamma rays EN 12697-8, Bituminous mixtures — Test methods for hot mix asphalt — Part 8: Determination of void characteristics of bituminous specimens EN 12697-10, Bituminous mixtures — Test methods for hot mix asphalt — Part 10: Compactability EN 12697-11, Bituminous mixtures — Test methods for hot mix asphalt — Part 11: Determination of the affinity between aggregate and bitumen EN 12697-12, Bituminous mixtures — Test methods for hot mix asphalt — Part 12: Determination of the water sensitivity of bituminous specimens EN 12697-13, Bituminous mixtures — Test methods for hot mix asphalt — Part 13: Temperature measurement EN 12697-14, Bituminous mixtures — Test methods for hot mix asphalt — Part 14: Water content EN 12697-15, Bituminous mixtures — Test methods for hot mix asphalt — Part 15: Determination of the segregation sensitivity EN 12697-16, Bituminous mixtures — Test methods for hot mix asphalt — Part 16: Abrasion by studded tyres EN 12697-17, Bituminous mixtures — Test methods for hot mix asphalt — Part 17: Particle loss of porous asphalt specimen EN 12697-18, Bituminous mixtures — Test methods for hot mix asphalt — Part 18: Binder drainage EN 12697-19, Bituminous mixtures — Test methods for hot mix asphalt — Part 19: Permeability of specimen EN 12697-20, Bituminous mixtures — Test methods for hot mix asphalt — Part 20: Indentation using cube or cylindrical specimens EN 12697-21, Bituminous mixtures — Test methods for hot mix asphalt — Part 21: Indentation using plate specimens EN 12697-22, Bituminous mixtures — Test methods for hot mix asphalt — Part 22: Wheel tracking EN 12697-23, Bituminous mixtures — Test methods for hot mix asphalt — Part 23: Determination of the indirect tensile strength of bituminous specimens EN 12697-24, Bituminous mixtures — Test methods for hot mix asphalt — Part 24: Resistance to fatigue EN 12697-25, Bituminous mixtures — Test methods for hot mix asphalt — Part 25: Cyclic compression test EN 12697-26, Bituminous mixtures — Test methods for hot mix asphalt — Part 26: Stiffness EN 12697-27, Bituminous mixtures — Test methods for hot mix asphalt — Part 27: Sampling EN 12697-28, Bituminous mixtures — Test methods for hot mix asphalt — Part 28: Preparation of samples for determining binder content, water content and grading BS EN 12697-34:2012 EN 12697-34:2012 (E) EN 12697-29, Bituminous mixtures — Test methods for hot mix asphalt — Part 29: Determination of the dimensions of a bituminous specimen EN 12697-30, Bituminous mixtures — Test methods for hot mix asphalt — Part 30: Specimen preparation by impact compactor EN 12697-31, Bituminous mixtures — Test methods for hot mix asphalt — Part 31: Specimen preparation by gyratory compactor EN 12697-32, Bituminous mixtures — Test methods for hot mix asphalt — Part 32: Laboratory compaction of bituminous mixtures by vibratory compactor EN 12697-33, Bituminous mixtures — Test methods for hot mix asphalt — Part 33: Specimen prepared by roller compactor EN 12697-34, Bituminous mixtures — Test methods for hot mix asphalt — Part 34: Marshall test EN 12697-35, Bituminous mixtures — Test methods for hot mix asphalt — Part 35: Laboratory mixing EN 12697-36, Bituminous mixtures — Test methods for hot mix asphalt — Part 36: Determination of the thickness of a bituminous pavement EN 12697-37, Bituminous mixtures — Test methods for hot mix asphalt — Part 37: Hot sand test for the adhesivity of binder on precoated chippings for HRA EN 12697-38, Bituminous mixtures — Test methods for hot mix asphalt — Part 38: Common equipment and calibration EN 12697-39, Bituminous mixtures — Test methods for hot mix asphalt — Part 39: Binder content by ignition EN 12697-40, Bituminous mixtures — Test methods for hot mix asphalt — Part 40: In situ drainability EN 12697-41, Bituminous mixtures — Test methods for hot mix asphalt — Part 41: Resistance to de-icing fluids EN 12697-42, Bituminous mixtures — Test methods for hot mix asphalt — Part 42: Amount of coarse foreign matter in reclaimed asphalt EN 12697-43, Bituminous mixtures — Test methods for hot mix asphalt — Part 43: Resistance to fuel EN 12697-44, Bituminous mixtures — Test methods for hot mix asphalt — Part 44: Crack propagation by semi-circular bending test EN 12697-45, Bituminous mixtures — Test methods for hot mix asphalt — Part 45: Saturation Ageing Tensile Stiffness (SATS) conditioning test EN 12697-46, Bituminous mixtures — Test methods for hot mix asphalt — Part 46: Low temperature cracking and properties by uniaxial tension tests EN 12697-47, Bituminous mixtures — Test methods for hot mix asphalt — Part 47: Determination of the ash content of natural asphalts prEN 12697-48, Bituminous mixtures — Test methods for hot mix asphalt — Part 48: Interlayer bond strength1) 1) In preparation BS EN 12697-34:2012 EN 12697-34:2012 (E) prEN 12697-49, Bituminous mixtures — Test methods for hot mix asphalt — Part 49: Skid resistance of asphalt in the laboratory1) prEN 12697-50, Bituminous mixtures — Test methods for hot mix asphalt — Part 50: Scuffing resistance of surface course asphalt1) According to the CEN/CENELEC Internal Regulations, the national standards organizations 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, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom BS EN 12697-34:2012 EN 12697-34:2012 (E) Scope This European Standard specifies a test method for determining the stability, flow and the Marshall Quotient values of specimens of bituminous mixtures mixed according to EN 12697-35 and prepared using the impact compactor method of test EN 12697-30 It is limited to dense graded asphalt concrete and hot rolled asphalt Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application For dated references, only the edition cited applies For undated references, the latest edition of the referenced document (including any amendments) applies EN 12697-6, Bituminous mixtures — Test methods for hot mix asphalt — Part 6: Determination of bulk density of bituminous specimens EN 12697-29, Bituminous mixtures — Test method for hot mix asphalt — Part 29: Determination of the dimensions of a bituminous specimen EN 12697-30, Bituminous mixtures — Test methods for hot mix asphalt — Part 30: Specimen preparation by impact compactor EN ISO 7500-1:2004, Metallic materials — Verification of static uniaxial testing machines — Part 1: Tension/compression testing machines — Verification and calibration of the force-measuring system (ISO 7500-1:2004) Terms and definitions For the purposes of this document, the following terms and definitions apply 3.1 stability S maximum load, in kilonewtons (kN), of a moulded asphalt specimen 3.2 flow F deformation of the moulded specimen in millimetres (mm) at maximum load less the nominal deformation obtained by extrapolation of the tangent of the graph of load against deformation back to zero load (A to M’ in Figure A.1) 3.3 tangential flow Ft nominal deformation of the moulded specimen, in millimetres (mm) obtained by extrapolation of the tangent of the graph of load against deformation forward to the stability load less the nominal deformation obtained by extrapolation of the tangent back to zero load (A to B’ in Figure A.1) 3.4 total flow FT deformation of the moulded specimen in millimetres (mm) at maximum load (0 to M’ in Figure A.1) 3.5 Marshall quotient ratio of the stability, S, to the flow, F, S/F Note to entry: See Annex A BS EN 12697-34:2012 EN 12697-34:2012 (E) Principle Marshall specimens are compacted in accordance with EN 12697-30 The Marshall stability, flow and quotient are subsequently determined on these specimens using defined procedures and reported along with the bulk density of the specimen Apparatus 5.1 Compression testing machine of Class or better according to EN ISO 7500-1:2004, clause 7, having a recommended minimum capacity of 28 kN and capable of applying loads to test specimens at a constant rate of deformation of (50 ± 2) mm/min after a transitory period less than 20 % of the loading time The rate of deformation is to be maintained 5.2 Flow measuring device, capable of determining deformation to an accuracy of ± 0,1 mm 5.3 Graphical plotter, for evaluating the curve of force versus deformation, e.g graphical plotter, strip recorder or software program NOTE A graphical plotter is required to obtain a test result by this test method If dial gauges are used, they should be checked and zeroed prior to each measurement In these cases, only the total flow can be recorded 5.4 Testing head, comprised of upper and lower breaking heads with the dimensions given in Figure B.1 5.5 Water bath, at least 150 mm deep and capable of thermostatically maintaining the water at a temperature of (60 ± 1) °C This bath shall have a perforated false bottom or shelf that can suspend the test specimens at least 25 mm above the bottom of the bath, and allow at least 25 mm depth of water above the specimens The size of the bath shall allow specimens to be placed face down and not in contact with one another A device to ensure continuous circulation of water shall also be fitted 5.6 Thermometer, capable of measuring a temperature of 60 °C accurate to 0,5 °C 5.7 Oven, capable of maintaining temperatures of (110 ± 5) °C 6.1 Procedure Specimen preparation 6.1.1 Specimens shall be compacted in accordance with EN 12697-30, ensuring that 50 blows are applied to each side within the acceptable temperature range given NOTE A different number of blows may be selected; for example, 35 blows for light traffic and 75 blows for heavy duty pavements 6.1.2 The compacted specimens shall be de-moulded, ensuring that they are cooled in air to avoid any danger of deformation and then tested in accordance with 6.1.1 and 6.1.3 After de-moulding, wait at least h before further testing begins All tests shall be completed within 32 h of de-moulding Specimens shall not be stacked prior to testing NOTE Specimens of rolled asphalt may be left in the moulds and immersed in cold water to facilitate rapid cooling The cooled specimens should be extruded from their moulds with the minimum of force and using an extractor of suitable design so that they are ejected without distortion or shock The bulk density of each specimen shall be determined in accordance with EN 12697-6 6.1.3 The height of each specimen shall be measured in accordance with EN 12697-29; or the volume shall be calculated from the bulk density measurement BS EN 12697-34:2012 EN 12697-34:2012 (E) 6.1.4 Immerse the cylindrical specimens on their flat surface in the water bath for at least 40 and not longer than 60 Maintain the temperature of the water in the bath at (60 ± 1) °C 6.2 Test procedure 6.2.1 Thoroughly clean the guide rods and the inside surfaces of the test heads Lubricate the guide rods to ensure that the upper test head slides freely over them 6.2.2 Prepare the test head by preheating for at least 30 at (60 ± 1) °C in the water bath, or for h in the oven This action shall be undertaken at the start of testing of a batch of specimens not greater than twelve in number In the event of a delay of more than between the testing of each specimen, the test head shall be heated in a suitable oven or water-bath maintained at the specified test temperature The minimum reheating period shall be the lesser of the delay encountered and 30 minutes when heated in a water bath, or double that when heated in an oven 6.2.3 Remove the test specimen from the water bath and place it centrally on its side in the test head, ensuring good surface contact between the specimen and the test head Place the complete assembly centrally on the testing machine Prior to testing each specimen, the test head shall be cleaned as required An environmentally suitable solvent may be used for cleaning and a silicone spray applied to prevent specimens adhering to the test head 6.2.4 Apply the load to the test specimen to achieve a constant rate of deformation of (50 ± 2) mm/min allowing for the transitory period Continue the application of this load until the maximum reading is obtained on the load-measuring device Record the load indicated This section of the test shall be carried out within 40 s of removal of the test specimen from the water bath Measure the flow (see 7.2) NOTE If dial gauges are used, record the movement of the top of the testing head from the instant of application of the load to the point when maximum load is reached (FT) Carry out the stability and flow tests on a set of four specimens Expression of results 7.1 The maximum load attained represents the stability of the mix only if the specimen height equals the required 63,5 mm A corrected stability shall be reported by multiplying the maximum load with the correction factor calculated from the following equations using the volume of the specimen as determined in accordance with 6.1: c = 5,2 e –0,025 h = 5,2 e –3,2 ⋅ 10 (–6) v (1) where c is the correction factor; h is the height of the specimen (in millimetres); v is the volume of the specimen determined in 6.1 (in cubic millimetres) The stability, S, is reported to the nearest 0,1 kN NOTE Corrections outside the range of specimen heights from 60,5 mm to 66,5 mm can lead to inaccurate results BS EN 12697-34:2012 EN 12697-34:2012 (E) 7.2 To obtain the flow value F, measure on the graph of force versus deformation the distance from the intersection of the tangent and the base line, A, to the point where the maximum load is achieved, M The flow values Ft and FT are similarly obtained Record the flow values, F, Ft and FT, to the nearest 0,1 mm 7.3 Test results shall be considered reliable if both the variation in stability between specimens, VS, is less than 15 % and the variation in flow between specimens, Vf, is less than 20 % Reject the test specimen with the largest variation and obtain the average value of the other specimens if either: the stability value from one or more specimens differs from the average stability by more than 15 %, or the flow value from one or more specimens differs from the average flow by more than 20 % Furthermore, if any value differs from the new average by more than 15 % for stability or 20 % for flow, repeat the test 7.4 The Marshall quotient shall be obtained by the calculation of S/F and reporting the value obtained to 0,1 kN/mm Test report The test report shall include the following information: a) the average results F, Ft, FT, S and Marshall quotient for each set of specimens; b) the average bulk density of the specimen set; c) the number and date of this European Standard Precision (see Table and Table 2) Table — Asphalt concrete Repeatability Marshall Stability Flow Reproducibility Standard deviation, σr Repeatability, r Standard deviation, σR Reproducibility, R (kN) 0,61 1,7 0,78 2,2 (mm) 0,25 0,7 0,29 0,8 NOTE The precision data are estimated from DIN 1996/11 [2] and NL-Standard for asphalt concrete — 2000 Standard RAW Bepalingen [3] Table — Hot rolled asphalt Repeatability Marshall Stability Flow NOTE 10 Reproducibility Standard deviation, σr Repeatability, r Standard deviation, σR Reproducibility, R (kN) 0,36 1,0 0,78 2,2 (mm) 0,21 0,6 0,46 1,3 The precision data are estimated from TRRL Research report 281 [4] BS EN 12697-34:2012 EN 12697-34:2012 (E) Annex A (normative) Marshall stability and flow values Figure A.1 is a graphical representation of the definitions for stability, S, flow, F, tangential flow, Ft, and total flow, FT, contained in clause Dimensions in millimetres Key Tangent Flow F Figure A.1 — Marshall stability and flow 11 BS EN 12697-34:2012 EN 12697-34:2012 (E) Annex B (normative) Testing head Figure B.1 illustrates the essential dimensions of a suitable breaking head for use in this test This testing head is used in conjunction with the compression testing machine to determine the stability and flow of the moulded specimens Dimensions in millimetres The radius shall be the same for both upper and lower segments Key Upper testing head Lower testing head Figure B.1 — Testing head 12 BS EN 12697-34:2012 EN 12697-34:2012 (E) Bibliography [1] EN 12697-35+A1, Bituminous mixtures — Test methods for hot mix asphalt — Part 35: Laboratory mixing [2] DIN 1996/11, Testing of bituminous materials for road building and related purposes; Determination of Marshall stability and of Marshall flow value [3] NL Standard for Asphalt concrete — 2000 Standard RAW Bepalingen [4] TRRL Research Report 281: Precision of tests used in the design of rolled asphalt 13 This page deliberately left blank This page deliberately left blank NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW British Standards Institution (BSI) BSI is the national body responsible for preparing British Standards and other standards-related publications, information and services BSI is incorporated by Royal Charter British Standards and other standardization products are published by BSI Standards Limited About us Revisions We bring together business, industry, government, consumers, innovators and others to shape their combined experience and expertise into standards -based solutions Our British Standards and other 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