ASTM D7552-22

Standard Test Method for Determining the Complex Shear Modulus (G*) of Asphalt Mixtures Using Dynamic Shear Rheometer

SIGNIFICANCE AND USE
5.1 The complex shear modulus of asphalt mixtures is a fundamental property of the material. Test results at critical temperatures (Tcritical) are used for specifications for some mixes. Mixtures with stiffer binders, aged mixes, mixtures with higher amounts of fines (material finer than 75 µ), and mixtures with lower voids all tend to have higher complex shear modulus values than mixtures with less stiff binders, unaged mixes, mixtures with low levels of fines, and higher air voids. In general, mixtures with higher complex shear modulus values at a given service temperature will exhibit lower permanent deformation values than similar mixtures tested at the same temperature that have lower complex shear modulus values.  
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.
SCOPE
1.1 This test method covers the determination of the complex shear modulus of asphalt mixtures using torsion rectangular geometry on a dynamic shear rheometer (DSR). It is applicable to asphalt mixtures having complex shear modulus values greater than 1 × 104 Pa when tested over a range of temperatures from –40 °C to 76 °C at frequencies of 0.01 to 25 Hz and strains of 0.0005 % to 0.1 %. The determination of complex shear modulus is typically determined at 20 °C to 70 °C at 0.01 % strain at ten discrete frequency values covering 0.01 to 10 Hz. From these data, temperature or frequency master curves can be generated as required. This test method is intended for determining the complex shear modulus of asphalt mixtures as required for specification testing or quality control of asphalt mixture production.  
1.2 This test method is appropriate for laboratory-prepared and compacted mixtures, field-produced and laboratory-compacted mixtures or field cores, regardless of binder type or grade and regardless of whether RAP is used in the mixture. Due to the geometry of the specimens being tested this test method is not applicable to open-graded or SMA mixtures. It has been found to be appropriate for dense-graded mixtures, whether coarse- or fine-graded, with 19 mm or smaller nominal maximum aggregate size.  
1.3 Since a precision estimate for this standard has not been developed, the test method is to be used for research and informational purposes only. Therefore, this standard should not be used for acceptance or rejection of a material for purchasing purposes.  
1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.5 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.  
1.6 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.  
1.7 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...

General Information

• Status: Published
• Publication Date: 14-Dec-2022
• ICS: 75.140 - Waxes, bituminous materials and other petroleum products
• ICS: 91.100.50 - Binders. Sealing materials
• Technical Committee: D04 - Road and Paving Materials
• Drafting Committee: D04.26 - Fundamental/Mechanistic 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: D7552 − 22
Standard Test Method for
Determining the Complex Shear Modulus (G*) of Asphalt
1
Mixtures Using Dynamic Shear Rheometer
This standard is issued under the fixed designation D7552; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope (excluding those in tables and figures) shall not be considered
as requirements of the standard.
1.1 This test method covers the determination of the com-
1.6 This standard does not purport to address all of the
plex shear modulus of asphalt mixtures using torsion rectan-
safety concerns, if any, associated with its use. It is the
gular geometry on a dynamic shear rheometer (DSR). It is
responsibility of the user of this standard to establish appro-
applicable to asphalt mixtures having complex shear modulus
4
priate safety, health, and environmental practices and deter-
values greater than 1 × 10 Pa when tested over a range of
mine the applicability of regulatory limitations prior to use.
temperatures from –40°C to 76°C at frequencies of 0.01 to
1.7 This international standard was developed in accor-
25Hz and strains of 0.0005% to 0.1%. The determination of
dance with internationally recognized principles on standard-
complex shear modulus is typically determined at 20°C to
ization established in the Decision on Principles for the
70°Cat0.01%strainattendiscretefrequencyvaluescovering
Development of International Standards, Guides and Recom-
0.01 to 10 Hz. From these data, temperature or frequency
mendations issued by the World Trade Organization Technical
mastercurvescanbegeneratedasrequired.Thistestmethodis
Barriers to Trade (TBT) Committee.
intendedfordeterminingthecomplexshearmodulusofasphalt
mixtures as required for specification testing or quality control
2. Referenced Documents
of asphalt mixture production.
2
2.1 ASTM Standards:
1.2 This test method is appropriate for laboratory-prepared
D8Terminology Relating to Materials for Roads and Pave-
and compacted mixtures, field-produced and laboratory-
ments
compacted mixtures or field cores, regardless of binder type or
D2041/D2041MTest Method for Theoretical Maximum
grade and regardless of whether RAP is used in the mixture.
Specific Gravity and Density of Asphalt Mixtures
Due to the geometry of the specimens being tested this test
D3203Test Method for Percent Air Voids in Compacted
method is not applicable to open-graded or SMA mixtures. It
Asphalt Mixtures
has been found to be appropriate for dense-graded mixtures,
D3666Specification for Minimum Requirements for Agen-
whethercoarse-orfine-graded,with19mmorsmallernominal
cies Testing and Inspecting Road and Paving Materials
maximum aggregate size.
D6752/D6752MTest Method for Bulk Specific Gravity and
1.3 Sinceaprecisionestimateforthisstandardhasnotbeen
Density of CompactedAsphalt Mixtures UsingAutomatic
developed, the test method is to be used for research and
Vacuum Sealing Method
informational purposes only. Therefore, this standard should
D6857/D6857MTest Method for Maximum Specific Grav-
not be used for acceptance or rejection of a material for
ity and Density of Asphalt Mixtures Using Automatic
purchasing purposes.
Vacuum Sealing Method
D6925Test Method for Preparation and Determination of
1.4 The values stated in SI units are to be regarded as
the Relative Density ofAsphalt Mix Specimens by Means
standard. No other units of measurement are included in this
of the Superpave Gyratory Compactor
standard.
D6926Practice for Preparation of Asphalt Mixture Speci-
1.5 The text of this standard references notes and footnotes
mens Using Marshall Apparatus
whichprovideexplanatorymaterial.Thesenotesandfootnotes
D7175Test Method for Determining the Rheological Prop-
erties of Asphalt Binder Using a Dynamic Shear Rheom-
eter
1
This test method is under the jurisdiction of ASTM Committee D04 on Road
and Paving Materials and is the direct responsibility of Subcommittee D04.26 on
2
Fundamental/Mechanistic Tests. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved Dec. 15, 2022. Published January 2023. Originally contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
approved in 2009. Last previous edition approved in 2014 as D7552–09 (2014). Standards volume information, refer to the standard’s Document Summary page on
DOI: 10.1520/D7552-22. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken
...

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: D7552 − 09 (Reapproved 2014) D7552 − 22
Standard Test Method for
Determining the Complex Shear Modulus (G*) Of
Bituminousof Asphalt Mixtures Using Dynamic Shear
1
Rheometer
This standard is issued under the fixed designation D7552; 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 test method covers the determination of the complex shear modulus of bituminousasphalt mixtures using torsion
rectangular geometry on a dynamic shear rheometer (DSR). It is applicable to bituminousasphalt mixtures having complex shear
4
modulus values greater than 1 × 10 Pa when tested over a range of temperatures from 10°C–40 °C to 76°C76 °C at frequencies
of 0.01 to 25 Hz 25 Hz and strains of 0.001 %0.0005 % to 0.1 %. The determination of complex shear modulus is typically
determined at 20°C20 °C to 70°C70 °C at 0.01%0.01 % strain at 10ten discrete frequency values covering 0.01 to 10 Hz. From
these data, temperature or frequency master curves can be generated as required. This test method is intended for determining the
complex shear modulus of bituminousasphalt mixtures as required for specification testing or quality control of bituminousasphalt
mixture production.
1.2 This test method is appropriate for laboratory prepared laboratory-prepared and compacted mixtures, field produced and
laboratory compacted field-produced and laboratory-compacted mixtures or field cores, regardless of binder type or grade and
regardless of whether RAP is used in the mixture. Due to the geometry of the specimens being tested this test method is not
applicable to open-graded or SMA mixtures. It has been found to be appropriate for dense-graded mixtures, whether coarse- or
fine-graded, with 19 mm or smaller nominal maximum aggregate size.
1.3 The between-laboratory reproducibility of this Since a precision estimate for this standard has not been developed, the test
method is being determined and will be available on or before June 2012. Therefore, this test method to be used for research and
informational purposes only. Therefore, this standard should not be used for acceptance or rejection of materials a material for
purchasing purposes.
1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
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 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.
1.6 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
This test method is under the jurisdiction of ASTM Committee D04 on Road and Paving Materials and is the direct responsibility of Subcommittee D04.26 on
Fundamental/Mechanistic Tests.
Current edition approved Aug. 1, 2014Dec. 15, 2022. Published November 2014January 2023. Originally approved in 2009. Last previous edition approved in 20092014
as D7552 – 09.D7552 – 09 (2014). DOI: 10.1520/D7552-09R14.10.1520/D7552-22.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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D7552 − 22
1.7 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:
C670D8 Practice for Preparing Precision and Bias Statements for Test Methods for Construction MaterialsTerminology Relating
to Materials for Roads and Pavements
D140 Practice for Sampling Asphalt Materials
D2041D2041/D2041M Test Method
...