EN 14769:2005
(Main)Bitumen and bituminous binders - Accelerated long-term ageing conditioning by a Pressure Ageing Vessel (PAV)
Bitumen and bituminous binders - Accelerated long-term ageing conditioning by a Pressure Ageing Vessel (PAV)
This European Standard specifies an accelerated ageing/conditioning procedure for bituminous binders. The procedure involves ageing trays of binder at elevated temperatures under pressurised conditions in a pressure ageing vessel (PAV).
NOTE For binders to be used in hot asphalt applications the pre-conditioning of the sample would typically be by one of the methods in EN 12607. For binders to be used in bituminous emulsion and cut-back applications the stabilising of the sample should be such that there are no volatiles remaining.
WARNING - The use of this standard can involve hazardous materials, operations and equipment, in particular, the use of a high pressure ageing vessel. 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 health and safety practices and determine the applicability of regulatory limitations prior to use.
If there is the likelihood of volatile components being present in a binder, this procedure shall not be used.
Bitumen und bitumenhaltige Bindemittel - Beschleunigte Langzeit-Alterung mit einem Druckalterungsbehälter (PAV)
Diese Europäische Norm legt ein Prüfverfahren mit beschleunigter Alterung/Behandlung für bitumenhaltige
Bindemittel fest. Das Verfahren beinhaltet die Alterung von Bindemitteln in Schalen bei erhöhten
Temperaturen in einem Druckalterungsbehälter (PAV) unter Überdruck-Bedingungen.
ANMERKUNG Bei Bindemitteln, die für Heißasphaltanwendungen verwendet werden, würde die Vorbehandlung der
Probe üblicherweise nach einem der Verfahren in EN 12607 erfolgen. Bei Bindemitteln, die in Anwendungen mit
Bitumenemulsionen und verschnittenen Bitumen verwendet werden sollen, sollte die Stabilisierung so erfolgen, dass keine
flüchtigen Bestandteile zurückbleiben.
WARNUNG : Die Anwendung dieser Norm kann gefährliche Substanzen, Arbeitsgänge und
Ausrüstung, insbesondere die Verwendung eines Hochdruckalterungsbehälters, einschließen. In der
Norm werden nicht alle Sicherheitsprobleme angesprochen, die mit ihrer Anwendung verbunden sind.
Es liegt in der Verantwortung des Anwenders dieser Norm, geeignete Gesundheitsschutz- und
Sicherheitsmaßnahmen vorzusehen und vorher zu klären, ob einschränkende Vorschriften zu
berücksichtigen sind.
Ist es wahrscheinlich, dass es flüchtige Bestandteile in einem Bindemittel gibt, darf dieses Verfahren
nicht angewendet werden.
Bitumes et liants bitumineux - Vieillissement long-terme accéléré réalisé dans un récipient de vieillissement sous pression (PAV)
La présente Norme européenne décrit une méthode de vieillissement/conditionnement accéléré des bitumes
et liants bitumineux. Cette méthode repose sur le vieillissement sous pression de plateaux de liants à des
températures élevées dans un récipient de vieillissement sous pression (PAV).
NOTE Pour les liants destinés à être utilisés à chaud, le préconditionnement de l’échantillon sera typiquement
effectué selon une des méthodes de l’EN 12607. Pour les liants destinés à être utilisés dans des émulsions bitumineuses
et des applications de liants fluidifiés ou fluxés, la stabilisation de l’échantillon devrait être telle que plus aucun composé
volatil ne soit présent.
AVERTISSEMENT : L'utilisation de la présente norme implique l'intervention de produits,
d'opérations et d'équipements à caractère dangereux, en particulier, l’utilisation d’un récipient de
vieillissement à haute pression. La présente norme n'est pas censée aborder tous les problèmes de
sécurité concernés par son usage. Il est de la responsabilité de l'utilisateur de consulter et d'établir
des règles d'hygiène et de sécurité appropriées et de déterminer l'applicabilité des restrictions
réglementaires avant utilisation.
Si des composés volatils sont suspectés être présents dans le liant, cette procédure ne doit pas être
utilisée.
Bitumen in bitumenska veziva – Pospešeno staranje v tlačni posodi (PAV)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-december-2005
%LWXPHQLQELWXPHQVNDYH]LYD±3RVSHãHQRVWDUDQMHYWODþQLSRVRGL 3$9
Bitumen and bituminous binders - Accelerated long-term ageing conditioning by a
Pressure Ageing Vessel (PAV)
Bitumen und bitumenhaltige Bindemittel - Beschleunigte Langzeit-Alterung mit einem
Druckalterungsbehälter (PAV)
Bitumes et liants bitumineux - Vieillissement long-terme accéléré réalisé dans un
récipient de vieillissement sous pression (PAV)
Ta slovenski standard je istoveten z: EN 14769:2005
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
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD
EN 14769
NORME EUROPÉENNE
EUROPÄISCHE NORM
October 2005
ICS 75.140; 91.100.50
English Version
Bitumen and bituminous binders - Accelerated long-term ageing
conditioning by a Pressure Ageing Vessel (PAV)
Bitumes et liants bitumineux - Vieillissement long-terme Bitumen und bitumenhaltige Bindemittel - Beschleunigte
accéléré réalisé dans un récipient de vieillissement sous Langzeit-Alterung mit einem Druckalterungsbehälter (PAV)
pression (PAV)
This European Standard was approved by CEN on 26 August 2005.
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 Central Secretariat 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 Central Secretariat has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,
Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36 B-1050 Brussels
© 2005 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 14769:2005: E
worldwide for CEN national Members.
Contents Page
Foreword .3
1 Scope .4
2 Normative references .4
3 Terms and definitions.4
4 Principle.5
5 Apparatus .5
6 Procedure .7
7 Precision.8
8 Report .9
Bibliography.11
Foreword
This European Standard (EN 14769:2005) 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 April 2006, and conflicting national standards shall be withdrawn at the latest
by April 2006.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark,
Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg,
Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United
Kingdom.
1 Scope
This European Standard specifies an accelerated ageing/conditioning procedure for bituminous binders. The
procedure involves ageing trays of binder at elevated temperatures under pressurised conditions in a pressure
ageing vessel (PAV).
NOTE For binders to be used in hot asphalt applications the pre-conditioning of the sample would typically be by one of
the methods in EN 12607. For binders to be used in bituminous emulsion and cut-back or fluxed applications the stabilising of
the sample should be such that there are no volatiles remaining.
WARNING — The use of this standard can involve hazardous materials, operations and equipment, in
particular, the use of a high pressure ageing vessel. 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 health and safety practices and determine the applicability of regulatory limitations prior to
use.
If there is the likelihood of volatile components being present in a binder, this procedure shall not be
used.
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 12607-1, Bitumen and bituminous binders – Determination of the resistance to hardening under the influence
of heat and air – Part 1: RTFOT method.
EN 12607-2:1999, Bitumen and bituminous binders – Determination of the resistance to hardening under the
influence of heat and air – Part 2: TFOT method.
EN 12607-3, Bitumen and bituminous binders – Determination of the resistance to hardening under the influence
of heat and air – Part 3: RFT method.
3 Terms and definitions
For the purposes of this European Standard, the following terms and definitions apply.
3.1
short-term ageing/conditioning
conditioning that the binder goes through during the method described in EN 12607 (parts 1, 2 & 3)
3.2
stabilisation
conditioning of the binders from bituminous emulsions, cutbacks or fluxed bitumens to produce residual binders
for further determination of their characteristics, eg the procedure described in prEN 14895
3.3
long-term ageing
ageing that the binder goes through during its service life
3.4
accelerated long-term ageing conditioning
simulated long-term ageing that the binder goes through during the accelerated pressure ageing procedure. In
the case of hot mix asphalt binders the long-term ageing is carried out on binders that have already been
conditioned through short-term ageing/conditioning. In the case of bituminous emulsion and cut-back, the long
term ageing is carried out on binders after a stabilisation procedure.
4 Principle
A static film of binder is heated to a specified temperature, under a specified air pressure for a given period of
time. This is to simulate the changes occurring to the binder within the pavement during use.
The effects of this ageing procedure are evaluated on the residual binder after the test.
NOTE The ageing of binders during service is affected by ambient temperature and air pressure as well as by mixture
associated variables such as volumetric mixture proportions, mixture permeability, aggregate properties and other factors.
This test is intended to provide an evaluation of the relative ageing behaviour of binders under specified conditions, but
cannot account entirely for bituminous application variables or provide relative resistance to ageing at in-service conditions.
5 Apparatus
Usual laboratory apparatus and glassware, together with the following:
5.1 Pressure/temperature vessel designed to operate at 2,1 MPa ± 0,1 MPa between 80 °C and 115 °C.
Either 5.1.1 and 5.1.2 or 5.1.3 applies (see Figure 1).
5.1.1 Pressure vessel, which shall be made from stainless steel and shall have internal dimensions adequate
to contain a pan holder capable of holding a number of containers (as per requirements and dimensions given in
EN 12607-2). The bottom of the pressure vessel shall be such that the containers are held in a horizontal
position with the binder film thickness evenly distributed across the diameter of the container. A schematic
showing a possible configuration of the vessel pan holder and containers and specifying dimensional
requirements is shown in Figure 2.
NOTE 1 Most pan holder assemblies hold up to 10 containers.
NOTE 2 Other pressure vessels of different internal dimensions may be used provided that the operating conditions can be
satisfied. In such cases the containers used may differ from the standard dimensions given in EN 12607-2.
5.1.2 Forced-draft oven, to be used with 5.1.1, capable of:
a) bringing the loaded pressurised vessel to the desired conditioning temperature ± 0,5 °C, as recorded by a
suitable thermometer inside the vessel, within two hours after loading the pressure vessel into the oven,
b) maintaining the temperature at all points within the vessel at the ageing temperature ± 0,5 °C.
The oven shall have sufficiently large interior dimensions to allow forced air to freely circulate within the
oven and around the pressure vessel. The oven shall contain a stand or a shelf, which supports the
loaded pressure vessel in a level position above the lower surface of the oven.
5.1.3 Pressure vessel, having the same dimensions described in 5.2.1, with an integral temperature control
system that is capable of:
a) bringing the loaded pressure vessel to the desired conditioning temperature ± 0,5 °C, as recorded by the
thermometer inside the vessel, within two hours,
b) maintaining the temperature at all points within the vessel at the ageing temperature ± 0,5 °C.
The vessel may be a separate unit to be placed in a forced draft oven or an integral part of a temperature
control system.
SAFETY PRECAUTIONS — The pressure ageing vessel operates at high temperatures and high
pressures. All safety guidelines issued by equipment manufacturers must be adhered to.
5.2 Pressure controlling devices
5.2.1 Pressure release valve, which prevents pressure in the vessel from exceeding 2,5 MPa during
the ageing procedure.
5.2.2 Pressure regulator, capable of controlling the pressure within the vessel to ± 0,1 MPa and with a
capacity sufficient to reduce the pressure from the source of compressed air so that the pressure within the
vessel is maintained at the operating pressure of 2,1 MPa ± 0,1 MPa.
5.2.3 Slow release bleed valve, which allows the pressure in the vessel at the completion of the test to
be reduced from 2,1 MPa, the operating pressure, to atmospheric pressure within 8 min to 15 min.
5.2.4 Pressure gauge, capable of measuring the pressure within the vessel to within 0,1 MPa during
the test. The pressure gauge shall be calibrated to an accuracy of ± 0,1 MPa at appropriate intervals.
5.3 Thermometer, accurate to 0,1 °C for measuring the temperature inside the pressure vessel.
NOTE A resistance thermal detector (RTD) has been found to be suitable.
5.4 Temperature recording device, data acquisition system capable of recording the temperature
throughout the test to 0,1 °C.
NOTE The current method of monitoring temperature is via a computerised log of time and temperature. It is assumed
the temperature recorded is that within every point within the ageing vessel.
5.5 Metal containers
The standard container is defined in EN 12607-2:1999 sub clause 4.3 and has a diameter of 140 mm ± 1 mm.
Similar containers with other diameters can be used if their diameters are determined with the same tolerance
and the amount of binder is adjusted as given in Equation (1).
Weighing
Weigh 50,0 ± 0,5 g in the container (nominal diameter 140 mm Ø).
If a container with another diameter is used weigh the amount given in Equation (1):
d1 is the normal container diameter (140 mm ± 1 mm),
d2 is the actual container diameter (tolerance ± 1 mm), and
M is the mass of binder at ambient temperature for the actual container.
M = 50,0 × (d2 × d2)/(d1 × d1) g ± 0,5 g (1)
5.6 Balance
The balance shall be capable of weighing to an accuracy of ± 0,1 g.
5.7 Vacuum oven (optional)
The vacuum oven shall be capable of maintaining a temperature up to 180 °C with an accuracy of ± 5 °C. The
vacuum system shall be capable of maintaining pressures below 15,0 kPa (± 2,5 kPa) absolute. Alternatively,
the pressure vessel itself may be used in lieu of the vacuum oven if it is capable of maintaining a temperature of
180 °C and a vacuum of 15,0 kPa (± 2,5 kPa).
5.8 Commercial bottled air
A sufficient supply of pressurized air should be available to carry out the test, commercially available bottled air
is suitable for this.
6 Procedure
SAFETY PRECAUTIONS — Use laboratory safety procedures in handling the hot bituminous binders
when preparing the specimens and removing the residue from the pressure vessel. Take particular care
when lifting the lid of the pressure vessel.
Pre-heat the PAV vessel or forced draft oven to the ageing temperature.
...
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