ASTM D7643-22

Standard Practice for Determining the Continuous Grading Temperatures and Continuous Grades for PG Graded Asphalt Binders

SIGNIFICANCE AND USE
5.1 The continuous grading temperatures and continuous grade are used for informational purposes only and shall not be used for the sale or purchase of asphalt binders. The continuous grading temperatures and continuous grade may be used for forensic or research studies and when producing, blending, modifying, or otherwise evaluating asphalt binders. This guide is applicable to Specification D6373, Tables 1 and 2.
Note 1: 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.
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 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.

General Information

• Status: Published
• Publication Date: 31-May-2022
• ICS: 91.100.50 - Binders. Sealing materials
• Technical Committee: D04 - Road and Paving Materials
• Drafting Committee: D04.44 - Rheological Tests

Standards Content (Sample)

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: D7643 − 22
Standard Practice for
Determining the Continuous Grading Temperatures and
1
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 D6373 Specification for Performance-Graded Asphalt
Binder
1.1 This practice is used to estimate the continuous grading
D6521 Practice for Accelerated Aging of Asphalt Binder
temperaturesandcontinuousgradeforanasphaltbindergraded
Using a Pressurized Aging Vessel (PAV)
in accordance with the requirements specified in Specification
D6648 Test Method for Determining the Flexural Creep
D6373.
Stiffness of Asphalt Binder Using the Bending Beam
1.2 The values stated in SI units are to be regarded as
Rheometer (BBR)
standard. No other units of measurement are included in this
D6723 Test Method for Determining the Fracture Properties
standard.
of Asphalt Binder in Direct Tension (DT) (Withdrawn
3
2021)
1.3 The text of this standard references notes and footnotes
which provide explanatory material. These notes and footnotes D6816 Practice for Determining Low-Temperature Perfor-
3
mance Grade (PG) ofAsphalt Binders (Withdrawn 2021)
(excluding those in tables and figures) shall not be considered
as requirements of the standard. D7175 Test Method for Determining the Rheological Prop-
erties of Asphalt Binder Using a Dynamic Shear Rheom-
1.4 This standard does not purport to address all of the
eter
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
3. Terminology
priate safety, health, and environmental practices and deter-
3.1 Definitions—Definitions for many terms common to
mine the applicability of regulatory limitations prior to use.
asphalt cement and asphalt binder are found in Terminology
1.5 This international standard was developed in accor-
D8.
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the
3.2 Definitions of Terms Specific to This Standard:
Development of International Standards, Guides and Recom-
3.2.1 continuous grade, n—a grade defined by the estimated
mendations issued by the World Trade Organization Technical
upper and lower continuous grading temperatures.
Barriers to Trade (TBT) Committee.
3.2.2 continuousgradingtemperatures,T,n—theestimated
c
temperatures at which the properties of an asphalt binder are
2. Referenced Documents
equal to the specification requirements given in Table 1 or 2 of
2
2.1 ASTM Standards:
Specification D6373.
D8 Terminology Relating to Materials for Roads and Pave-
3.2.3 difference between estimated continuous grading tem-
ments
perature for S and the m-value, ∆T —determined by subtract-
C
D2872 Test Method for Effect of Heat and Air on a Moving
ing the continuous grading temperature for the m-value from
Film of Asphalt Binder (Rolling Thin-Film Oven Test)
the continuous grading temperature for S.
D3666 Specification for Minimum Requirements for Agen-
3.2.4 PG grading temperatures, T ,n—the temperatures
cies Testing and Inspecting Road and Paving Materials PG
listed in Specification D6373 used to designate the grade of a
PG binder, for example, 64 °C, 22 °C, and –28 °C for a PG
1
This practice is under the jurisdiction of ASTM Committee D04 on Road and
64-28.
Paving Materials and is the direct responsibility of Subcommittee D04.44 on
Rheological Tests.
3.2.5 specification requirements, n—the limiting values
Current edition approved June 1, 2022. Published June 2022. Originally
given in Specification D6373 that are used to grade an asphalt
approved in 2010. Last previous edition approved in 2016 as D7643 – 16. DOI:
binder, for example, 1.00 kPa for G*/sinδ, 300 MPa for S, etc.
10.1520/D7643-22.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
3
Standards volume information, refer to the standard’s Document Summary page on The last approved version of this historical standard is referenced on
the ASTM website. www.astm.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D7643 − 22
300 and 600 MPa at the low temperature PG grade.
3.2.6 test temperatures, T and T,n—two PG grading
1 2
temperatures, one grade
...

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: D7643 − 16 D7643 − 22
Standard Practice for
Determining the Continuous Grading Temperatures and
1
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
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
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)
3
D6723 Test Method for Determining the Fracture Properties of Asphalt Binder in Direct Tension (DT) (Withdrawn 2021)
3
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
1
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.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
The last approved version of this historical standard is referenced on www.astm.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
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
...