1、BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06Bitumen and bituminous binders - Determination of the elastic recovery of modified bitumenBS EN 13398:2017National forewordThis British Standard is the UK implementation of EN 13398:2017. It supersedes BS EN 13398:2010,
2、 which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee PTI/13, Petroleum Testing and Terminology.A list of organizations represented on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
3、provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2018 Published by BSI Standards Limited 2018ISBN 978 0 580 90773 9ICS 91.100.50; 75.140Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard
4、 was published under the authority of the Standards Policy and Strategy Committee on 31 January 2018.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS EN 13398:2017EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 13398December 2017ICS 75.140; 91.100.50 Supersedes EN
5、 13398:2010EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGCEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2017 CEN Ref. No. EN 13398:2017: EAll rights of exploitation in any form and by any means reserved worldwide for CEN national
6、MembersBitumen and bituminous binders - Determination of the elastic recovery of modified bitumenBitumes et liants bitumineux - Dtermination du retour lastique des bitumes modifisBitumen und bitumenhaltige Bindemittel - Bestimmung der elastischen Rckstellung von modifiziertem BitumenThis European St
7、andard was approved by CEN on 15 October 2017.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 concernin
8、g 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
9、 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, Former Yugoslav Republic of Macedonia, France, Germany
10、, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.English VersionEN 13398:2017 (E)European forewordThis document (EN 13398:2017) has been
11、prepared by Technical Committee CEN/TC 336 “Bituminous binders”, the secretariat of which is held by AFNOR.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 June 2018, and conflicting national stand
12、ards shall be withdrawn at the latest by June 2018.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 13398:2010.This documen
13、t has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association.Compared to EN 13398:2010, the major changes in the present standard are: Incorrect reference to ISO 5725 for rounding off values removed from Clause 2 and 9; the possibility of altern
14、ative measuring conditions are now mentioned in Clause 4 Principle; reference to ASTM D113 has been deleted in 5.1 and Bibliography; in 6.3 the maximum temperature for the pre-heating of moulds is linked to the softening point (ring and ball) of the specimen or to 70 C if softening point (ring and b
15、all) is not known; Clause 11 Other test conditions is now part of Clause 4 Principle; several test methods are now referenced in the Bibliography.According to the CEN-CENELEC Internal Regulations, the national standards organisations of the following countries are bound to implement this European St
16、andard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Sl
17、ovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.2BS EN 13398:2017EN 13398:2017 (E)European foreword 2European foreword 41 Scope . 52 Normative references 53 Terms and definitions . 54 Principle 55 Apparatus . 65.1 Specimen moulding equipment 65.2.1 Water bath . 65.2.2 Traction devi
18、ce 75.5 Scissors 76 Preparation of test samples 76.1 General . 76.2 Preparation of the moulds 76.3 Filling and conditioning the moulds . 76.4 Temperature check of the water bath . 87 Procedure. 88 Calculation 89 Expression of results 910 Precision . 910.1 General . 910.2 Repeatability . 910.3 Reprod
19、ucibility . 911 Test report . 9Bibliography .103Contents PageBS EN 13398:2017EN 13398:2017 (E)European forewordThis document (EN 13398:2017) has been prepared by Technical Committee CEN/TC 336 “Bituminous binders”, the secretariat of which is held by AFNOR.This European Standard shall be given the s
20、tatus of a national standard, either by publication of an identical text or by endorsement, at the latest by June 2018, and conflicting national standards shall be withdrawn at the latest by June 2018.Attention is drawn to the possibility that some of the elements of this document may be the subject
21、 of patent rights. CEN shall not be held responsible for identifying any or all such patent rights.This document supersedes EN 13398:2010.This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association.Compared to EN 13398:2010, the maj
22、or changes in the present standard are: Incorrect reference to ISO 5725 for rounding off values removed from Clause 2 and 9; the possibility of alternative measuring conditions are now mentioned in Clause 4 Principle; reference to ASTM D113 has been deleted in 5.1 and Bibliography; in 6.3 the maximu
23、m temperature for the pre-heating of moulds is linked to the softening point (ring and ball) of the specimen or to 70 C if softening point (ring and ball) is not known; Clause 11 Other test conditions is now part of Clause 4 Principle; several test methods are now referenced in the Bibliography.Acco
24、rding 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, Former Yugoslav Republic of Macedonia, France, Germany
25、, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.4BS EN 13398:2017EN 13398:2017 (E)1 ScopeThis European Standard specifies a method f
26、or the determination of the elastic recovery of bituminous binders in a ductilometer at the test temperature (typically 25 C or 10 C; other temperatures can be used).It is especially applicable to bituminous binders modified with thermoplastic elastomers, but can also be used with other bituminous b
27、inders which generate only small recovery.WARNING The use of this European Standard may involve hazardous materials, operations and equipment. This European standard does not purport to address all of the safety problems associated with its use. It is the responsibility of the user of this European
28、standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.2 Normative referencesThe following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. Fo
29、r dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.EN 58, Bitumen and bituminous binders Sampling bituminous bindersEN 1427, Bitumen and bituminous binders Determination of the softening point R
30、ing and Ball methodEN 12594, Bitumen and bituminous binders Preparation of test samples3 Terms and definitionsFor the purposes of this document, the following terms and definitions apply.3.1bitumen threadtest specimen of moulded bitumen, when stretched3.2half-threadstwo pieces obtained when a bitume
31、n specimen has been stretched to a thread and then cut in the middle3.3elastic recoveryR Eexpressed as a percentage of the distance between the ends of the half-threads, which has developed 30 min after cutting relative to the elongation length, which is in general 200 mm4 PrincipleA bituminous bind
32、er specimen is stretched at the test temperature and a constant rate of 50 mm/min to a predetermined elongation (200 mm). The bitumen thread thus produced is cut in the middle to obtain two half-threads. After a predetermined time of 30 min for recovery has elapsed, the shortening of the half-thread
33、s is measured and expressed as the percentage of the elongation length. Although this procedure is typically performed at a test temperature of 25 C or 10 C, it may be useful to perform it at different temperatures, especially for soft or highly modified binders. If the sample breaks before reaching
34、 200 mm (premature break), the length at break and its elastic recovery shall be measured and then the results can be considered valid.5BS EN 13398:2017EN 13398:2017 (E)5 ApparatusUsual laboratory apparatus and glassware, together with the following:5.1 Specimen moulding equipmentThe moulds shall be
35、 made of metal, shall consist of two halves, and shall have the dimensions given in Figure 1.The ends for the moulds are known as clips and are similar to those specified in EN 13589. The inner radius R of the clips should be of (15,5 0,7) mm, the opening width B (20,0 0,2) mm and the inner length o
36、f the clips E (= R + D) should be (22,8 0,9) mm (see Figure 1).Both halves of a mould shall be kept in place by two diametrically opposed sliding pins. The moulds shall be placed on a base plate, also made of metal, and pressed together by the knurled screw or by a plate whilst the test specimens ar
37、e being cast.KeyDimension mm tolerance mmA 10,0 0,2B 20,0 0,2C 30,0 0,3D 7,3 0,5E = R + D 22,8 0,9R 15,5 0,7Thickness 10,0 0,1Figure 1 Mould type (normative dimensions, informative design)5.2 Ductilometer, consisting of a water bath with a temperature control (5.2.1) and a traction device (5.2.2).5.
38、2.1 Water bathThe water bath shall be temperature controlled, capable of maintaining the specimen and the attachment device at the specified temperature throughout the test to an accuracy of 0,5 C, provided with means of checking the temperature. The water bath shall allow elongation of the test spe
39、cimen to at least 200 mm. It shall be designed in such a way that at least two specimens can be tested in parallel. 6 BS EN 13398:2017EN 13398:2017 (E)The distance between each mould and between the walls of the water bath shall be at least 10 mm. The water level shall be such that there is at least
40、 25 mm of water above and below the specimen.Circulation of the bath water via a thermostat and, possibly, additional thermal insulation of the water bath shall guarantee the required test temperature within 0,5 C. Circulation shall be maintained during the test at a reduced rate of approximately 1,
41、5 l/min.NOTE It may be advisable to direct the water stream at the inlet against a baffle plate to avoid turbulent water flow.5.2.2 Traction deviceThe traction device shall allow two specimens to be tested in parallel. The traction plates shall be exactly positioned by a stop switch allowing easy in
42、troduction of the pins into the holes of the clips with ease. The drive of the traction device shall be designed in such a way that the combined movement of the pins during the entire test is steady at a constant rate of (50,0 2,5) mm/min. The drive should be sufficiently powerful to overcome high d
43、eformation resistance at the beginning of the test without speed loss.5.3 Knife or paint scraper, with a straight blade of at least 40 mm length or a plane blade.5.4 Mould release agent, mixture of glycerine and dextrine or mineral talc, or another commercially available release agent like silicone
44、grease.NOTE When using a new mould release agent for the first time make sure it does not influence the results by interfering with the bituminous binder.5.5 Scissors5.6 Ruler with scale divisions to 1 mm.5.7 Timing device, with accuracy of 1 s to check the speed of the traction device.5.8 Thermomet
45、er or temperature measuring devise, readable to 0,1 C with an accuracy of 0,1 C.6 Preparation of test samples6.1 GeneralEnsure that the laboratory sample is representative of the bituminous binder to be analysed, in accordance with EN 58. Ensure that the laboratory sample is homogeneous and non-cont
46、aminated. The test samples shall be prepared in accordance with EN 12594.6.2 Preparation of the mouldsThe base plate and the inner walls of the side-pieces shall be applied with a thin coat of the release agent. Assemble the clips and sides on the base plate and arrest them with the knurled screw. E
47、nsure that the specified distance between the sides is achieved (Dimension A on Figure 1).6.3 Filling and conditioning the mouldsThe moulds shall be carefully filled with the bitumen up to the surfaces of the moulds with a meniscus protruding.7BS EN 13398:2017EN 13398:2017 (E)It is allowed to prehea
48、t the mould up to the temperature of the softening point (ring and ball) of the sample (in accordance with EN 1427) in order to facilitate filling the mould when pouring the sample. If the softening point (ring and ball) is not known it is allowed to pre-heat the moulds to 70 C maximum.Keep the moul
49、ded specimens for about 1 h at room temperature then remove the excess sample using a heated knife. Reject any specimens exhibiting defects. Place the moulded specimens in the water bath maintained at the test temperature for (90 10) min, before testing.The time from filling the moulds to the start of stretching shall be kept within (150 10) min.6.4 Temperature check of the water bathCheck the temperature of the water at the far end of each traction plate close to the pins. The temperature shall not differ by more than 0
