DIN EN 12607-2-2015 Bitumen and bituminous binders - Determination of the resistance to hardening under influence of heat and air - Part 2 TFOT Method German version EN 12607-2 201.pdf

1、January 2015 Translation by DIN-Sprachendienst.English price group 9No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS

2、 75.140; 91.100.50!%?DH“2283337www.din.deDDIN EN 12607-2Bitumen and bituminous binders Determination of the resistance to hardening under influence of heatand air Part 2: TFOT Method;English version EN 12607-2:2014,English translation of DIN EN 12607-2:2015-01Bitumen und bitumenhaltige Bindemittel B

3、estimmung der Bestndigkeit gegen Verhrtung unter Einfluss von Wrme und Luft Teil 2: TFOT-Verfahren;Englische Fassung EN 12607-2:2014,Englische bersetzung von DIN EN 12607-2:2015-01Bitumes et liants bitumineux Dtermination de la rsistance au durcissement sous leffet de la chaleur et de lair Partie 2:

4、 Mthode TFOT;Version anglaise EN 12607-2:2014,Traduction anglaise de DIN EN 12607-2:2015-01SupersedesDIN EN 12607-2:2007-06www.beuth.deDocument comprises 13 pagesIn case of doubt, the German-language original shall be considered authoritative.01.15 DIN EN 12607-2:2015-01 2 A comma is used as the dec

5、imal marker. National foreword This document (EN 12607-2:2014) has been prepared by Technical Committee CEN/TC 336 “Bituminous binders” (Secretariat: AFNOR, France). The responsible German bodies involved in its preparation were the DIN-Normenausschuss Materialprfung (DIN Standards Committee Materia

6、ls Testing) and the DIN-Normenausschuss Bauwesen (DIN Standards Committee Building and Civil Engineering), Joint Committee NA 062-03-32 GA Bitumen; Prfverfahren und Anforderungen fr die Bindemittel. EN 12607 consists of the following parts under the general title Bitumen and bituminous binders Deter

7、mination of the resistance to hardening under the influence of heat and air: Part 1: RTFOT method Part 2: TFOT method Part 3: RFT method Amendments This standard differs from DIN EN 12607-2:2007-06 as follows: a) the scope has been rendered more precise as regards hardening; b) Clause 3 “Principle”

8、now differentiates between paving applications and industrial applications; c) requirements for the temperature measuring device have been revised; d) a reference temperature has been included in Subclause 6.1 “Test conditions”; e) the Bibliography has been revised; f) the standard has been editoria

9、lly revised. Previous editions DIN EN 12607-2: 2000-04, 2007-06 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12607-2 November 2014 ICS 75.140; 91.100.50 Supersedes EN 12607-2:2007English Version Bitumen and bituminous binders - Determination of the resistance to hardening under influence of

10、heat and air - Part 2: TFOT method Bitumes et liants bitumineux - Dtermination de la rsistance au durcissement sous leffet de la chaleur et de lair - Partie 2: Mthode TFOT Bitumen und bitumenhaltige Bindemittel - Bestimmung der Bestndigkeit gegen Verhrtung unter Einfluss von Wrme und Luft - Teil 2:

11、TFOT-Verfahren This European Standard was approved by CEN on 16 August 2014. 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 bibli

12、ographical 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 respons

13、ibility 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, Former Yugoslav Repub

14、lic of Macedonia, 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 COMIT EUROPEN DE NORMAL

15、ISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2014 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12607-2:2014 EEN 12607-2:2014 (E) 2 Contents Page Foreword 3 1 Scope 4 2 N

16、ormative references 4 3 Principle 4 4 Apparatus .5 5 Sampling .6 6 Procedure .7 7 Calculation 7 8 Expression of results 8 9 Precision .8 10 Test report 9 Annex A (informative) Characteristics of thermometers 10 Bibliography . 11 DIN EN 12607-2:2015-01 EN 12607-2:2014 (E) 3 Foreword This document (EN

17、 12607-2:2014) 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 status of a national standard, either by publication of an identical text or by endorsement, at the latest by May 2015 and con

18、flicting national standards shall be withdrawn at the latest by May 2015. 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 documen

19、t supersedes EN 12607-2:2007. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association. In comparison with EN 12607-2:2007, the following significant changes have been made: changed/added wording of the Warning in the Scope; EN 1

20、2595, Bitumen and bituminous binders Determination of kinematic viscosity has been added to Clause 2; the reference to mercury thermometer has been deleted (see subclause 4.2) and Annex A is informative. EN 12607 consists of the following parts under the general title “Bitumen and bituminous binders

21、 Determination of the resistance to hardening under the influence of heat and air”: Part 1: RTFOT method; Part 2: TFOT method; Part 3: RFT method. The scope of this standard has been enlarged by adding oxidized bitumens and hard industrial bitumens that are not used for paving applications. The reas

22、on is to facilitate that EN 13303, Bitumen and bituminous binders Determination of the loss of mass after heating of industrial bitumen can be replaced in product standards by EN 12607-2 at the next revision of EN 13303. It is to be noted that this if so decided will change the property from loss in

23、 mass into change in mass in EN 13304, Bitumen and bituminous binders Framework for specification of oxidized bitumens and in EN 13305, Bitumen and bituminous binders Framework for specification of hard industrial bitumens. According to the CEN-CENELEC Internal Regulations, the national standards or

24、ganizations 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, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembour

25、g, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. DIN EN 12607-2:2015-01 EN 12607-2:2014 (E) 41 Scope This part of EN 12607 specifies a method for measuring the combined effects of heat and air on a film of bitume

26、n or bituminous binder, simulating the hardening which most bituminous binders undergo during mixing in an asphalt mixing plant. The method is suitable for other bituminous binders than paving grade bitumen, but the reference temperature might give excessive hardening that does not resemble real con

27、ditions during mixing at the plant. The method may not represent the hardening that occurs during mixing of warm mix binders. Additionally, this part of EN 12607 specifies a method for the determination of the change in mass of oxidized bitumens and hard industrial bitumens after heating. The method

28、 is used to detect volatile components. The method is referred to as TFOT, i.e. Thin Film Oven Test. WARNING Use of this European Standard can involve hazardous materials, operations and equipment. This European Standard does not purport to address all of the safety problems associated with its use.

29、 It is the responsibility of the user of this European Standard to identify the hazards and assess the risks involved in performing this test method and to implement sufficient control measures to protect individual operators (and the environment). This includes appropriate safety and health practic

30、es and determination of the applicability of regulatory limitations prior to use. If there is a likelihood of volatile components being present in a binder, this procedure should not be used. It should not be used for cut-back bitumen or bituminous emulsions before these products have been stabilize

31、d, e.g. in accordance with EN 13074-2. 2 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 r

32、eferenced document (including any amendments) applies. EN 58, Bitumen and bituminous binders - Sampling bituminous binders EN 1425, Bitumen and bituminous binders - Characterization of perceptible properties EN 12594, Bitumen and bituminous binders - Preparation of test samples EN 12595, Bitumen and

33、 bituminous binders - Determination of kinematic viscosity 3 Principle A film of bituminous binder is heated in an oven at a specified temperature for a given period of time. For bituminous binders for paving applications, the effects of heat and air are determined based on the change in mass (expre

34、ssed as a percentage) and on the change in the bituminous binders properties such as kinematic viscosity according to EN 12595, before and after the period in the oven. For bituminous binders for industrial applications, the combined effects of heat and air and loss of volatiles are determined based

35、 on the change in mass (expressed as a percentage). This will be the value from this conditioning method that will be utilized in EN 13304 and EN 13305 as loss in mass (change in sign). NOTE Penetration according to EN 1426 and softening point according to EN 1427 can be measured on harder grades be

36、fore and after oven treatment at 163 C. DIN EN 12607-2:2015-01 EN 12607-2:2014 (E) 5 4 Apparatus Usual laboratory apparatus and glassware, together with the following: 4.1 Oven, electrically heated and conforming to the performance requirements indicated in Table 1 for operating temperatures up to 1

37、80 C. The oven shall be rectangular with a minimum interior height, width and depth of 330 mm. The front door shall be hinged and tightly fitted, and have a clear opening of the same height and width as the interior of the oven. The window on the door shall be at least 100 mm by 100 mm, with two she

38、ets of glass separated by an air space. The window shall permit an unobstructed view of the interior of the oven so that the control thermometer, located as specified in 6.1 may be read without opening the door. NOTE 1 The oven can alternatively be provided with an inner glass door through which the

39、 thermometer can be read upon opening the outer door momentarily. The oven shall be ventilated by convection currents of air; the oven shall have air inlets and outlets evacuating hot gases meeting the requirements of Table 1. NOTE 2 These inlets and outlets can be of different size and arrangement

40、provided the requirements in Table 1 are met. Table 1 Performance requirements for Thin Film Oven Characteristics Requirements Deviation from a specified test temperature throughout the testing chamber during a 24 h period for the differential between ambient and test temperature, when more than 50

41、C, maximum, % of differential 5 Time constant, maximum, s 720 Rate of ventilation of testing chamber, air changes per h, minimum 10 NOTE 3 These performance requirements are extracted from ASTM E145, type IB (gravity convection ventilated oven). The oven shall be provided with a metal circular shelf

42、 with a minimum diameter of 250 mm. The shelf shall provide a flat surface to support the containers without blocking all air circulation through the shelf when the containers are in place. The shelf shall be suspended by a vertical shaft and centred with respect to the horizontal interior of the ov

43、en. The shelf shall be mechanically driven to rotate at the rate of (5,5 1,0) r/min. The shelf shall be vertically located as close to the centre of the oven as allowed by the requirements of 6.1 regarding thermometer placement. Minimum size ovens allow the use of two containers. Larger ovens, havin

44、g proportionally larger shelves to accommodate a greater number of containers can be suitable. Under no circumstances should more than one shelf, properly centred, be used in an oven. 4.2 Temperature measuring device. A temperature measuring device (combining sensor and reading unit) shall have a ra

45、nge from at least 110 C to 170 C, be readable to 0,1 C or less and, have an accuracy of 0,5 C or better. DIN EN 12607-2:2015-01 EN 12607-2:2014 (E) 6Sensors based on platinum resistance thermometers have been found suitable but other principles are also allowed. The thermal response time of the sens

46、or shall be comparable with the former used reference (see informative Annex A). The temperature measuring device shall be calibrated regularly. A solid stem mercury thermometer (which used to be the former reference thermometer as described in Annex A) is also allowed if national regulations permit

47、 its use. When measuring and controlling nominally constant temperatures as in this test method, the thermal response time can be rather high (e.g. slow response to a change in temperature). Care shall be taken to consider this aspect since low thermal response times of the sensor can indicate great

48、er cyclic variations than the bituminous material in practise. 4.3 Container, (in which the sample of bituminous binder is subjected to the test), cylindrical pan (140 1) mm in inside diameter and (9,5 0,5) mm deep with a flat bottom, stainless steel or aluminium, with a thickness of (0,6 0,1) mm to

49、 (1,0 0,1) mm. NOTE 1 50 ml of sample in this container will give a film thickness of approximately 3,2 mm. NOTE 2 Containers have a tendency to become warped or bent with use. Although a small amount of warping does not significantly affect results, it is advisable to eliminate damaged pans. 4.4 Balance, accurate to 10 mg, readable to 1 mg. 5 Sampling 5.1 General Make sure that the laboratory sample is homogeneous and is not contaminated according to EN 1425. Take all necessary safety precau