FprEN 12607-1
(Main)Bitumens and bituminous binders - Determination of the resistance to hardening under influence of heat and air - Part 1: RTFOT method
Bitumens and bituminous binders - Determination of the resistance to hardening under influence of heat and air - Part 1: RTFOT method
This document specifies a method for the conditioning of bitumen or bituminous binders in order to provide for measuring the combined effects of heat and air on a thin moving film of bitumen or bituminous binder simulating the hardening which most bituminous binders undergo during mixing in an asphalt mixing plant. The method is referred to as RTFOT – Rolling Thin Film Oven Test.
The method described is applicable to paving grade bitumen. The method described is also applicable to other bituminous binders considering that the reference temperature can result in excessive hardening that does not resemble real conditions during mixing at the plant. It is possible that the method does not represent the hardening that occurs during mixing bitumen used for warm mix asphalt.
The method described is not applicable to those binders having a viscosity at the tested temperature not allowing to provide a moving film. In some cases, it is possible that the test sample creeps out of the glass container and flows on the heating elements of the oven during testing.
The method described is not applicable to binders with volatiles components present. In case of cutback bitumen or bituminous emulsion, the described procedure is only applicable after being stabilized, e.g. in accordance with EN 13074 2 [9].
WARNING — Use of this document can involve hazardous materials, operations and equipment. This document does not purport to address all of the safety problems associated with its use. It is the responsibility of the user of this document 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 practices and determination of the applicability of regulatory limitations prior to use.
Bitumen und bitumenhaltige Bindemittel - Bestimmung der Beständigkeit gegen Verhärtung unter Einfluss von Wärme und Luft - Teil 1: RTFOT-Verfahren
Dieses Dokument legt ein Verfahren für die Vorbehandlung von Bitumen oder bitumenhaltigen Bindemitteln zur Bestimmung der kombinierten Wirkungen von Wärme und Luft auf einen rollierenden dünnen Film aus Bitumen oder bitumenhaltigem Bindemittel fest, mit dem die Verhärtung der meisten bitumenhaltigen Bindemittel während des Mischvorgangs in einer Asphaltmischanlage simuliert wird. Die Prüfung wird als RTFOT-Verfahren („Rolling Thin Film Oven Test“) bezeichnet – Prüfung mit rollierendem dünnen Film.
Das beschriebene Verfahren ist bei Straßenbaubitumen anwendbar. Angesichts der Tatsache, dass die Referenztemperatur zu übermäßiger Verhärtung führen kann, die keine Ähnlichkeit mit den während des Mischvorgangs in einer Asphaltmischanlage tatsächlich auftretenden Bedingungen hat, ist das beschriebene Verfahren auch bei anderen bitumenhaltigen Bindemitteln anwendbar. Das Verfahren gibt die Verhärtung, wie sie während des Mischens von Bitumen für Warmasphalte auftritt, möglicherweise nicht wieder.
Das beschriebene Verfahren ist bei Bindemitteln, deren Viskosität bei der Prüftemperatur das Erzeugen eines rollierenden Films nicht zulässt, nicht anwendbar. In einigen Fällen kann die Untersuchungsprobe über das Glasgefäß hinauskriechen und während der Prüfung auf die Heizelemente der Wärmekammer fließen.
Das Verfahren ist bei Bindemitteln mit flüchtigen Bestandteilen nicht anwendbar. Bei verschnittenem Bitumen oder Bitumenemulsionen ist das beschriebene Verfahren nur nach einer Stabilisierung, z. B. nach EN 13074 2 [[9]], anwendbar.
WARNUNG Die Anwendung dieses Dokuments kann den Einsatz gefährlicher Stoffe, Arbeitsgänge und Geräte bedingen. Dieses Dokument erhebt nicht den Anspruch, alle mit seiner Anwendung verbundenen Sicherheitsprobleme anzusprechen. Es liegt in der Verantwortung des Anwenders dieses Dokuments, die Gefahren zu identifizieren und die mit der Durchführung der Prüfung verbundenen Risiken zu beurteilen sowie geeignete Kontrollmaßnahmen zu implementieren, um den Ausführenden (und die Umwelt) zu schützen. Dies beinhaltet einen angemessenen Arbeits- und Gesundheitsschutz sowie die Klärung vor der Anwendung, ob einschränkende Vorschriften zu berücksichtigen sind.
Bitumes et liants bitumineux - Détermination de la résistance au durcissement sous l'effet de la chaleur et de l'air - Partie 1 : Méthode RTFOT
Ce document décrit une méthode de conditionnement des bitumes et des liants bitumineux, qui a pour objectif de rendre possible ensuite la mesure des effets combinés de la chaleur et de l'air sur un film mince de bitume ou de liant bitumineux en renouvellement permanent. Ce conditionnement simule le durcissement que subissent la plupart des liants bitumineux au cours du malaxage dans une centrale d'enrobage. Cette méthode est désignée par l'acronyme anglais RTFOT (Rolling Thin Film Oven Test) c’est-à-dire conditionnement d’un film mince en rotation dans une étuve.
Cette méthode s'applique aux bitumes routiers. La méthode s'applique aussi à d’autres types de liants bitumineux, en sachant que la température de référence pourrait alors induire un durcissement excessif qui ne ressemblerait pas à celui qui advient lors d'un enrobage en centrale. Il se peut que cette méthode ne soit pas représentative du durcissement des liants qui advient pendant l’enrobage tiède.
La méthode décrite n'est pas applicable à certains liants dont la viscosité à la température de conditionnement ne permet pas un renouvellement du film. Dans certains cas, l’échantillon pourrait même s’écouler hors de la fiole en verre et couler sur les éléments chauffants de l’étuve au cours de l’essai.
La méthode décrite n'est pas applicable aux liants contenant des fractions volatiles. Dans le cas des bitumes fluxés ou fluidifiés ou des émulsions bitumineuses, cette méthode ne s'applique qu'après un traitement de stabilisation, par exemple conformément à l’EN 13074-2 [9].
AVERTISSEMENT - L'utilisation de ce document implique l'usage de produits, d'opérations et d'équipements à caractère dangereux. Le présent document n'est pas censé aborder tous les problèmes de sécurité concernés par son usage. Il est de la responsabilité de son utilisateur d’identifier les dangers et d’évaluer les risques associés à la mise en œuvre de cette méthode d'essai, et de mettre en place des mesures de contrôle adaptées pour assurer la protection de chaque opérateur (et la protection de l'environnement). Ces mesures incluent des règles d'hygiène et de sécurité appropriées et la détermination de l'applicabilité des restrictions réglementaires avant utilisation.
Bitumen in bitumenska veziva - Določanje odpornosti proti otrjevanju pod vplivom toplote in zraka - 1. del: Metoda RTFOT
General Information
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Standards Content (Sample)
SLOVENSKI STANDARD
oSIST prEN 12607-1:2023
01-junij-2023
Bitumen in bitumenska veziva - Določanje odpornosti proti otrjevanju pod vplivom
toplote in zraka - 1. del: Metoda RTFOT
Bitumen and bituminous binders - Determination of the resistance to hardening under
influence of heat and air - Part 1: RTFOT method
Bitumen und bitumenhaltige Bindemittel - Bestimmung der Beständigkeit gegen
Verhärtung unter Einfluss von Wärme und Luft - Teil 1: RTFOT-Verfahren
Bitumes et liants bitumineux - Détermination de la résistance au durcissement sous
l'effet de la chaleur et de l'air - Partie 1 : Méthode RTFOT
Ta slovenski standard je istoveten z: prEN 12607-1
ICS:
75.140 Voski, bitumni in drugi naftni Waxes, bituminous materials
proizvodi and other petroleum products
91.100.50 Veziva. Tesnilni materiali Binders. Sealing materials
oSIST prEN 12607-1:2023 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
oSIST prEN 12607-1:2023
oSIST prEN 12607-1:2023
DRAFT
EUROPEAN STANDARD
prEN 12607-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
April 2023
ICS Will supersede EN 12607-1:2014
English Version
Bitumen and bituminous binders - Determination of the
resistance to hardening under influence of heat and air -
Part 1: RTFOT method
Bitumes et liants bitumineux - Détermination de la Bitumen und bitumenhaltige Bindemittel -
résistance au durcissement sous l'effet de la chaleur et Bestimmung der Beständigkeit gegen Verhärtung unter
de l'air - Partie 1 : Méthode RTFOT Einfluss von Wärme und Luft - Teil 1: RTFOT-
Verfahren
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 336.
If this draft becomes a European Standard, 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.
This draft European Standard was established by CEN 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, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.
Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 12607-1:2023 E
worldwide for CEN national Members.
oSIST prEN 12607-1:2023
prEN 12607-1:2023 (E)
Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 Principle . 5
5 Apparatus . 5
6 Sampling . 10
6.1 General. 10
6.2 Test sample preparation . 10
7 Procedure . 10
7.1 Test conditions . 10
7.2 Determination and measurement . 10
7.3 Measurement . 11
8 Calculation . 11
9 Expression of results . 12
10 Precision . 12
10.1 Repeatability . 12
10.2 Reproducibility . 12
11 Test report . 13
Annex A (informative) Characteristics of thermometer . 14
Annex B (informative) Temperature homogeneity verification in RTFOT oven . 15
Bibliography . 18
oSIST prEN 12607-1:2023
prEN 12607-1:2023 (E)
European foreword
This document (prEN 12607-1:2023) has been prepared by Technical Committee CEN/TC 336
“Bituminous binders”, the secretariat of which is held by AFNOR.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 12607-1:2014.
Compared to the previous edition the main technical changes are:
a) reference duration of procedure was added in Clause 4;
b) Clause 4 was updated by removing limitation to test following the RTFOT procedure to those listed;
c) reference to new informative Annex B was made in 5.1;
d) amendments were made on temperature control and verification in 5.1 and in the new informative
Annex B;
e) a complementary drawing to Figure 3 in Clause 5 was added to show concave glass containers and
renamed into Figure 3 a) and Figure 3 b) and a second note was added to 5.4;
f) Clause 6 was aligned with draft revised EN 12594;
g) 6.3 was removed;
h) Clause 8 was editorially updated;
i) a new informative Annex B on temperature verification was added.
EN 12607, Bitumen and bituminous binders — Determination of the resistance to hardening under the
influence of heat and air, is currently composed with the following parts:
— Part 1: RTFOT method
— Part 2: TFOT method
— Part 3: RFT method
oSIST prEN 12607-1:2023
prEN 12607-1:2023 (E)
1 Scope
This document specifies a method for measuring the combined effects of heat and air on a thin moving
film of bitumen or bituminous binder simulating the hardening which most bituminous binders
undergo during mixing in an asphalt mixing plant.
The method described is not applicable to some modified binders or to those where the viscosity does
not allow to provide a moving film. In some cases, the sample may creep out of the glass container and
flow on the heating elements of the oven during testing. The method is suitable for other bituminous
binders than paving grade bitumen, but the reference temperature might give excessive hardening that
do not resemble real conditions during mixing at the plant. The method may not represent the
hardening that occurs during mixing of warm mix binders.
The method is referred to as RTFOT, i.e. Rolling Thin Film Oven Test.
WARNING — Use of this document can involve hazardous materials, operations and equipment. This document
does not purport to address all of the safety problems associated with its use. It is the responsibility of the user of
this document 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 practices 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 cutback bitumen or bituminous emulsions before these products have
been stabilized, e.g. in accordance with EN 13074-2.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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 1426, Bitumen and bituminous binders - Determination of needle penetration
EN 1427, Bitumen and bituminous binders - Determination of the softening point - Ring and Ball method
EN 12594, Bitumen and bituminous binders - Preparation of test samples
EN 12596, Bitumen and bituminous binders - Determination of dynamic viscosity by vacuum capillary
EN 13302, Bitumen and bituminous binders - Determination of dynamic viscosity of bituminous binder
using a rotating spindle apparatus
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp
— IEC Electropedia: available at https://www.electropedia.org/
oSIST prEN 12607-1:2023
prEN 12607-1:2023 (E)
4 Principle
A moving film of bituminous binder is heated in an oven to a specified temperature for a given period of
time with a constant supply of air.
The effects of heat and air are determined based on the change in mass (expressed as a percentage) or
on the change in the bituminous binder’s characteristics such as penetration according to EN 1426,
softening point according to EN 1427 or dynamic viscosity according to EN 12596 or EN 13302, and
other tests before and after the period in the oven.
The reference temperature of this conditioning is 163 °C and the reference duration is 75 min.
5 Apparatus
Usual laboratory apparatus and glassware, together with the following:
5.1 Oven, rectangular, double-walled and electrically heated. The inside dimensions excluding the air
plenum shall be as follows:
— height: (340 ± 15) mm;
— width: (405 ± 15) mm;
— depth: (445 ± 15) mm.
The front door shall contain a symmetrically located window of the following dimensions:
— width: (320 ± 15) mm;
— height: (215 ± 15) mm.
This window shall contain two sheets of heat resistant glass separated by an air space. The window
shall permit an unobstructed view of the interior of the oven.
The top of the upper heating element shall be (25 ± 9) mm below the oven floor.
The oven shall be ventilated by convection currents of air; the oven shall have air inlets and outlets for
the evacuation of hot gases. The air inlets toward the bottom of the oven shall be located so that the air
is able to flow around the heating elements and their total open area shall be (1 500 ± 100) mm . The
outlets for the hot gases evacuation shall be located in the upper part of the oven and their total open
area shall be (1 000 ± 100) mm .
The oven shall incorporate an air flow around the side walls and ceiling. The air plenum (between the
wall and the sheaths) shall be of uniform thickness (38 ± 3) mm [Figure 1 a)]. The inside of the oven
shall be equipped with a vertical circular aluminium carriage with a diameter of (300 ± 10) mm
[Figure 2 a)]. The horizontal axis of the circular carriage is located (160 ± 10) mm from the upper inside
wall of the oven, excluding the air plenum. The carriage shall be provided with suitable openings and
spring clips for firmly holding eight glass containers in a horizontal position [Figure 2 b)]. The carriage
shall be mechanically driven by a 20 mm diameter shaft and shall make 15 turns within (60 ± 1) s. The
front surface of the carriage shall be (110 ± 5) mm from the rear inside wall of the oven.
On the upper surface and at the midpoint of the width of the oven and (150 ± 5) mm from the front face
of the carriage, a squirrel cage-type fan shall be mounted with an outside diameter of (135 ± 5) mm and
a thickness of (75 ± 5) mm and turned at (1 725 ± 100) r/min by an externally mounted motor.
The fan shall be set so that it turns in an opposite direction to its vanes. The air flow characteristics shall
be suction from the floor of the oven then flow along the walls in the sheaths fitted for this purpose and
exhaust at the upper surface through the fan [Figure 1 a) and Figure 1 b)].
oSIST prEN 12
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