ASTM D7643-22

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Designation: D7643 − 16 D7643 − 22
Standard Practice for
Determining the Continuous Grading Temperatures and
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Continuous Grades for PG Graded Asphalt Binders
This standard is issued under the fixed designation D7643; 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 is used to estimate the continuous grading temperatures and continuous grade for an asphalt binder graded in
accordance with the requirements specified in Specification D6373.
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.3 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 and health practices and determine the applicability of regulatory limitations
prior to use.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.
1.4 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.
1.5 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.
2. Referenced Documents
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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
D6373 Specification for Performance-Graded Asphalt Binder
D6521 Practice for Accelerated Aging of Asphalt Binder Using a Pressurized Aging Vessel (PAV)
D6648 Test Method for Determining the Flexural Creep Stiffness of Asphalt Binder Using the Bending Beam Rheometer (BBR)
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D6723 Test Method for Determining the Fracture Properties of Asphalt Binder in Direct Tension (DT) (Withdrawn 2021)
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D6816 Practice for Determining Low-Temperature Performance Grade (PG) of Asphalt Binders (Withdrawn 2021)
D7175 Test Method for Determining the Rheological Properties of Asphalt Binder Using a Dynamic Shear Rheometer
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This practice is under the jurisdiction of ASTM Committee D04 on Road and Paving Materials and is the direct responsibility of Subcommittee D04.44 on Rheological
Tests.
Current edition approved Dec. 1, 2016June 1, 2022. Published January 2017June 2022. Originally approved in 2010. Last previous edition approved in 20102016 as
D7643 – 10.D7643 – 16. DOI: 10.1520/D7643-16.10.1520/D7643-22.
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
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The last approved version of this historical standard is referenced on www.astm.org.
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D7643 − 22
3. Terminology
3.1 Definitions: Definitions—Definitions for many terms common to asphalt cement and asphalt binder are found in Terminology
D8.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 continuous grade, n—a grade defined by the estimated upper and lower continuous grading temperatures.
3.2.2 continuous grading temperatures, T , n—the estimated temperatures at which the properties of an asphalt binder are equal
c
to the specification requirements given in TablesTable 1 or 2 of Specification D6373.
3.2.3 difference between estimated continuous grading temperature for S and the m-value, ΔT —determined by subtracting the
C
continuous grading temperature for the m-value from the continuous grading temperature for S.
3.2.4 PG gr
...