SIST EN 12607-2:2007

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Bitumen und bitumenhaltige Bindemittel - Bestimmung der Beständigkeit gegen Verhärtung unter Einfluss von Wärme und Luft - Teil 2: TFOT-VerfahrenBitumes et liants bitumineux - Détermination de la résistance au durcissement sous l'effet de la chaleur et de l'air - Partie 2 : Méthode TFOTBitumen and bituminous binders - Determination of the resistance to hardening under the influence of heat and air - Part 2: TFOT Method.91.100.50Veziva. Tesnilni materialiBinders. Sealing materials75.140Voski, bitumni in drugi naftni proizvodiWaxes, bituminous materials and other petroleum productsICS:Ta slovenski standard je istoveten z:EN 12607-2:2007SIST EN 12607-2:2007en01-julij-2007SIST EN 12607-2:2007SLOVENSKI
STANDARDSIST EN 12607-2:20001DGRPHãþD







EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 12607-2March 2007ICS 75.140; 91.100.50Supersedes EN 12607-2:1999
English VersionBitumen and bituminous binders - Determination of theresistance to hardening under the influence of heat and air - Part2: TFOT Method.Bitumes et liants bitumineux - Détermination de larésistance au durcissement sous l'effet de la chaleur et del'air - Partie 2 : Méthode TFOTBitumen und bitumenhaltige Bindemittel - Bestimmung derBeständigkeit gegen Verhärtung unter Einfluss von Wärmeund Luft - Teil 2: TFOT-VerfahrenThis European Standard was approved by CEN on 3 February 2007.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 CEN 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 CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, 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 and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2007 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 12607-2:2007: E



EN 12607-2:2007 (E) 2 Contents Page Foreword.3 1 Scope.4 2 Normative references.4 3 Principle.4 4 Apparatus.4 5 Sampling.6 6 Procedure.6 7 Calculation.7 8 Expression of results.7 9 Precision.8 10 Test report.8 Annex A (normative)
Characteristics of thermometer.9 Bibliography.10



EN 12607-2:2007 (E) 3 Foreword This document (EN 12607-2:2007) 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 September 2007, and conflicting national standards shall be withdrawn at the latest by September 2007. This document supersedes EN 12607-2:1999. This European standard EN 12607 consists of the following parts under the general title: Bitumen and bituminous binders – 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 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, 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 and United Kingdom.



EN 12607-2:2007 (E) 4 1 Scope This European Standard describes a method for measuring the combined effects of heat and air on a film of bitumen or bituminous binder, simulating the hardening that a bituminous binder undergoes during mixing in an asphalt mixing plant. The method is referred to as TFOT, i.e. Thin Film Oven Test. WARNING — Use of this standard can involve hazardous materials, operations and equipment. This standard does not purport to address all of the safety problems associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and to determine 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 cutback bitumen or bituminous emulsions before these products have been stabilised, e.g. in accordance with EN 14895. 2 Normative references The following referenced documents are indispensable for the application of this document. For 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 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 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. The effects of heat and air are determined based on the change in mass (expressed as a percentage) and on the change in the bituminous binder's properties such as kinematic viscosity (EN 12595), before and after the period in the oven. NOTE Penetration (EN 1426) and softening point (EN 1427) can be measured on harder grades before and after oven treatment at 163 °C. 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 180 °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 sheets 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.



EN 12607-2:2007 (E) 5 NOTE 1 The oven can alternatively be provided with an inner glass door through which the 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 provided the requirements in Table 1 are met. Table 1 — Performance requirements for Thin Film Oven Characteristic Requirement 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 °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 E 145, type IB (gravity convection ventilated oven). The oven shall be provided with a metal circular shelf 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 oven. The shelf shall be mechanically driven to rotate at the rate of (5,5 ± 1,0) r/min. The shelf shall be vertically located
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