ASTM D6521-22
(Practice)Standard Practice for Accelerated Aging of Asphalt Binder Using a Pressurized Aging Vessel (PAV)
Standard Practice for Accelerated Aging of Asphalt Binder Using a Pressurized Aging Vessel (PAV)
SIGNIFICANCE AND USE
5.1 This practice is designed to simulate the in-service oxidative aging that occurs in asphalt binders during pavement service. Residue from this conditioning practice may be used to estimate the physical or chemical properties of asphalt binders after several years of in-service aging in the field.
5.2 Binders conditioned using this practice are normally used to determine specification properties in accordance with Specification D6373 or D8239, or AASHTO M 320.
5.3 For asphalt binders of different grades or from different sources, there is no unique correlation between the time and temperature in this conditioning practice and in-service pavement age and temperature. Therefore, for a given set of in-service climatic conditions, it is not possible to select a single PAV conditioning time, temperature, and pressure that will predict the properties or the relative rankings of the properties of asphalt binders after a specific set of in-service exposure conditions.
5.4 The relative degree of hardening of different asphalt binders varies with conditioning temperatures and pressures in the PAV. Therefore, two asphalt binders may age at a similar rate at one condition of temperature and pressure, but age differently at another condition. Hence, the relative rates of aging for a set of asphalts at PAV conditions may differ significantly from the actual in-service relative rates at lower pavement temperatures and ambient pressures.
SCOPE
1.1 This practice covers the conditioning of asphalt binders to simulate accelerated aging (oxidation) by means of pressurized air and elevated temperature. This is intended to simulate the changes in rheology which occur in asphalt binders during in-service oxidative aging, but may not accurately simulate the relative rates of aging. It is normally intended for use with residue from Test Method D2872 (RTFOT), which is designed to simulate plant aging.
Note 1: PAV conditioning has not been validated for materials containing particulate materials.
1.2 The aging of asphalt binders during service is affected by ambient temperature and by mixture-associated variables, such as the volumetric proportions of the mix, the permeability of the mix, properties of the aggregates, and possibly other factors. This conditioning process is intended to provide an evaluation of the relative resistance of different asphalt binders to oxidative aging at selected elevated aging temperatures and pressures, but cannot account for mixture variables or provide the relative resistance to aging at in-service conditions.
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.4 The text of this standard references notes and footnotes which provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the standard
Note 2: The quality of the results produced by this standard are dependent on the competence of the personnel performing the procedure and the capability, calibration, and maintenance of the equipment used. Agencies that meet the criteria of Specification D3666 are generally considered capable of competent and objective testing, sampling, inspection, etc. Users of this standard are cautioned that compliance with Specification D3666 alone does not completely ensure reliable results. Reliable results depend on many factors; following the suggestions of Specification D3666 or some similar acceptable guideline provides a means of evaluating and controlling some of those factors.
1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.6 This international standard was de...
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This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: D6521 − 22
Standard Practice for
Accelerated Aging of Asphalt Binder Using a Pressurized
1
Aging Vessel (PAV)
This standard is issued under the fixed designation D6521; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
means of evaluating and controlling some of those factors.
1. Scope
1.5 This standard does not purport to address all of the
1.1 This practice covers the conditioning of asphalt binders
safety concerns, if any, associated with its use. It is the
to simulate accelerated aging (oxidation) by means of pressur-
responsibility of the user of this standard to establish appro-
ized air and elevated temperature. This is intended to simulate
priate safety, health, and environmental practices and deter-
the changes in rheology which occur in asphalt binders during
mine the applicability of regulatory limitations prior to use.
in-service oxidative aging, but may not accurately simulate the
1.6 This international standard was developed in accor-
relative rates of aging. It is normally intended for use with
dance with internationally recognized principles on standard-
residue from Test Method D2872 (RTFOT), which is designed
ization established in the Decision on Principles for the
to simulate plant aging.
Development of International Standards, Guides and Recom-
NOTE 1—PAV conditioning has not been validated for materials
mendations issued by the World Trade Organization Technical
containing particulate materials.
Barriers to Trade (TBT) Committee.
1.2 The aging of asphalt binders during service is affected
by ambient temperature and by mixture-associated variables, 2. Referenced Documents
such as the volumetric proportions of the mix, the permeability
2
2.1 ASTM Standards:
of the mix, properties of the aggregates, and possibly other
D8 Terminology Relating to Materials for Roads and Pave-
factors. This conditioning process is intended to provide an
ments
evaluation of the relative resistance of different asphalt binders
D2872 Test Method for Effect of Heat and Air on a Moving
to oxidative aging at selected elevated aging temperatures and
Film of Asphalt Binder (Rolling Thin-Film Oven Test)
pressures, but cannot account for mixture variables or provide
D3666 Specification for Minimum Requirements for Agen-
the relative resistance to aging at in-service conditions.
cies Testing and Inspecting Road and Paving Materials
1.3 The values stated in SI units are to be regarded as
D4753 Guide for Evaluating, Selecting, and Specifying Bal-
standard. No other units of measurement are included in this
ances and Standard Masses for Use in Soil, Rock, and
standard.
Construction Materials Testing
D6373 Specification for Performance-Graded Asphalt
1.4 The text of this standard references notes and footnotes
Binder
which provide explanatory material. These notes and footnotes
D8239 Specification for Performance-Graded Asphalt
(excluding those in tables and figures) shall not be considered
Binder Using the Multiple Stress Creep and Recovery
as requirements of the standard
(MSCR) Test
NOTE 2—The quality of the results produced by this standard are
E1137/E1137M Specification for Industrial Platinum Resis-
dependent on the competence of the personnel performing the procedure
tance Thermometers
and the capability, calibration, and maintenance of the equipment used.
3
Agencies that meet the criteria of Specification D3666 are generally 2.2 AASHTO Standards:
considered capable of competent and objective testing, sampling,
M 320 Specification for Performance-Graded Asphalt
inspection, etc. Users of this standard are cautioned that compliance with
Binder
Specification D3666 alone does not completely ensure reliable results.
M 332 Specification for Performance-Graded Asphalt
Reliable results depend on many factors; following the suggestions of
Specification D3666 or some similar acceptable guideline provides a
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
1
This practice is under the jurisdiction of ASTM Committee D04 on Road and contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Paving Materials and is the direct responsibility of Subcommittee D04.46 on Standards volume information, refer to the standard’s Document Summary page on
Durability and Distillation Tests. the ASTM website.
3
Current edition approved May 1, 2022. Published June 2022. Originally Available from American Association of State Highway and Trans
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: D6521 − 19a D6521 − 22
Standard Practice for
Accelerated Aging of Asphalt Binder Using a Pressurized
1
Aging Vessel (PAV)
This standard is issued under the fixed designation D6521; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1 This practice covers the conditioning of asphalt binders to simulate accelerated aging (oxidation) by means of pressurized air
and elevated temperature. This is intended to simulate the changes in rheology which occur in asphalt binders during in-service
oxidative aging, but may not accurately simulate the relative rates of aging. It is normally intended for use with residue from Test
Method D2872 (RTFOT), which is designed to simulate plant aging.
NOTE 1—PAV conditioning has not been validated for materials containing particulate materials.
1.2 The aging of asphalt binders during service is affected by ambient temperature and by mixture-associated variables, such as
the volumetric proportions of the mix, the permeability of the mix, properties of the aggregates, and possibly other factors. This
conditioning process is intended to provide an evaluation of the relative resistance of different asphalt binders to oxidative aging
at selected elevated aging temperatures and pressures, but cannot account for mixture variables or provide the relative resistance
to aging at in-service conditions.
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.4 The text of this standard references notes and footnotes which provide explanatory material. These notes and footnotes
(excluding those in tables and figures) shall not be considered as requirements of the standard
NOTE 2—The quality of the results produced by this standard are dependent on the competence of the personnel performing the procedure and the
capability, calibration, and maintenance of the equipment used. Agencies that meet the criteria of Specification D3666 are generally considered capable
of competent and objective testing, sampling, inspection, etc. Users of this standard are cautioned that compliance with Specification D3666 alone does
not completely ensure reliable results. Reliable results depend on many factors; following the suggestions of Specification D3666 or some similar
acceptable guideline provides a means of evaluating and controlling some of those factors.
1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of
regulatory limitations prior to use.
1.6 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
1
This practice is under the jurisdiction of ASTM Committee D04 on Road and Paving Materials and is the direct responsibility of Subcommittee D04.46 on Durability
and Distillation Tests.
Current edition approved Nov. 1, 2019May 1, 2022. Published November 2019June 2022. Originally approved in 2000. Last previous edition approved in 2019 as
D6521 – 19.D6521 – 19a. DOI: 10.1520/D6521-19A.10.1520/D6521-22.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
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D6521 − 22
2. Referenced Documents
2
2.1 ASTM Standards:
D8 Terminology Relating to Materials for Roads and Pavements
D2872 Test Method for Effect of Heat and Air on a Moving Film of Asphalt Binder (Rolling Thin-Film Oven Test)
D3666 Specification for Minimum Requirements for Agencies Testing and Inspecting Road and Paving Materials
D4753 Guide for Evaluating, Selecting, and Specifying Balances and Standard Masses for Use in Soil, Rock, and Construction
Materials Testing
D6373 Specification for Performance-Graded Asphalt Binder
D8239 Specification for Performance-Graded Asphalt Binder Using the Multiple Stress Creep and Recovery (MSCR) Test
E1137/E1137M Specification for Industrial Platinum Resistance The
...
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