Standard Test Method for Multiple Stress Creep and Recovery (MSCR) of Asphalt Binder Using a Dynamic Shear Rheometer <a href="#fn00002"></a>
SIGNIFICANCE AND USE
This test method is used to identify the presence of elastic response in a binder and the change in elastic response at two different stress levels. Non-recoverable creep compliance has been shown to be an indicator of the resistance of an asphalt binder to permanent deformation under repeated load.
This test method is also useful as a surrogate for other test methods used to measure elasticity in asphalt binders such as Test Method D5801 (Toughness and Tenacity), Test Method D6084 (Elastic Recovery), and Test Method D7175 (DSR phase angle).
SCOPE
1.1 This test method covers the determination of percent recovery and non-recoverable creep compliance of asphalt binders by means of Multiple Stress Creep and Recovery (MSCR) testing. The MSCR test is conducted using the Dynamic Shear Rheometer (DSR) at a specified temperature.
1.2 This standard is appropriate for unaged material, material aged in accordance with Test Method D2872 (RTFO), material aged in accordance with Practice D6521 (PAV), and material aged in accordance with both Test Method D2872 and Practice D6521.
Note 1—The majority of development work on this test method was performed on material aged in accordance with Test Method D2872 (RTFO).
1.3 The percent recovery is intended to provide a means to determine the presence of elastic response and stress dependence of polymer modified and unmodified asphalt binders.
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.
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Designation: D7405 − 10a
StandardTest Method for
Multiple Stress Creep and Recovery (MSCR) of Asphalt
1,2
Binder Using a Dynamic Shear Rheometer
This standard is issued under the fixed designation D7405; 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 D8 Terminology Relating to Materials for Roads and Pave-
ments
1.1 This test method covers the determination of percent
D2872 Test Method for Effect of Heat and Air on a Moving
recovery and non-recoverable creep compliance of asphalt
Film of Asphalt (Rolling Thin-Film Oven Test)
binders by means of Multiple Stress Creep and Recovery
D5801 Test Method for Toughness and Tenacity of Bitumi-
(MSCR) testing. The MSCR test is conducted using the
nous Materials
Dynamic Shear Rheometer (DSR) at a specified temperature.
D6084 Test Method for Elastic Recovery of Asphalt Mate-
1.2 This standard is appropriate for unaged material, mate-
rials by Ductilometer
rial aged in accordance with Test Method D2872 (RTFO),
D6373 Specification for Performance Graded Asphalt
material aged in accordance with Practice D6521 (PAV), and
Binder
material aged in accordance with both Test Method D2872 and
D6521 Practice for Accelerated Aging of Asphalt Binder
Practice D6521.
Using a Pressurized Aging Vessel (PAV)
NOTE 1—The majority of development work on this test method was
D7175 Test Method for Determining the Rheological Prop-
performed on material aged in accordance with Test Method D2872
erties of Asphalt Binder Using a Dynamic Shear Rheom-
(RTFO).
eter
1.3 The percent recovery is intended to provide a means to
4
2.2 AASHTO Standards:
determine the presence of elastic response and stress depen-
M 320 Specification for Performance-Graded Asphalt
dence of polymer modified and unmodified asphalt binders.
Binder
1.4 The values stated in SI units are to be regarded as
TP 70 Test Method for Multiple Stress Creep and Recovery
standard. No other units of measurement are included in this
(MSCR) of Asphalt Binder Using a Dynamic Shear
standard.
Rheometer
1.5 This standard does not purport to address all of the
3. Terminology
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
3.1 Definitions—Fordefinitionsofgeneraltermsusedinthis
priate safety and health practices and determine the applica-
standard, refer to Terminology D8.
bility of regulatory limitations prior to use.
3.1.1 creep and recovery, n—a standard rheological test
protocolwherebyaspecimenissubjectedtoaconstantloadfor
2. Referenced Documents
a fixed time period then allowed to recover at zero load for a
3
fixed time period.
2.1 ASTM Standards:
C670 Practice for Preparing Precision and Bias Statements
3.1.2 non-recoverable creep compliance (J ), n—the re-
nr
for Test Methods for Construction Materials
sidual strain in a specimen after a creep and recovery cycle
divided by the stress applied in kPa.
1
This test method is under the jurisdiction of ASTM Committee D04 on Road 4. Summary of Test Method
and Paving Materials and is the direct responsibility of Subcommittee D04.44 on
4.1 This test method is used to determine the presence of
Rheological Tests.
Current edition approved June 1, 2010. Published June 2010. Originally elastic response in an asphalt binder under shear creep and
approved in 2008. Last previous edition approved in 2010 as D7405 – 10. DOI:
recovery at two stress levels at a specified temperature. For
10.1520/D7405-10A.
performance grade (PG) binders, the specified temperature will
2
This test method is based on a work product of the Federal Highway
Administration. A similar standard is published as AASHTO TP 70.
3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
4
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Available from American Association of State Highway and Transportation
Standards volume information, refer to the standard’s Document Summary page on Officials (AASHTO), 444 N. Capitol St., NW, Suite 249, Washington, DC 20001,
the ASTM website. http://www.transportation.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
D7405 − 10a
more frequent data points may be required.
typically be the PG grade upper temperature as determined in
Specification D6373 or AASHTO M 320. Sample preparation
8.3 Allowingnorestperiodbetweencycles,repeatthecreep
andapparatusareinaccordancewithTestMethodD7175using
and recovery cycle in 8.2 nine times for a total of ten cycles.
the
...
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:D7405–10 Designation:D7405–10a
Standard Test Method for
Multiple Stress Creep and Recovery (MSCR) of Asphalt
,
1 2
Binder Using a Dynamic Shear Rheometer
This standard is issued under the fixed designation D7405; 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 percent recovery and non-recoverable creep compliance of asphalt binders by
means of Multiple Stress Creep and Recovery (MSCR) testing. The MSCR test is conducted using the Dynamic Shear Rheometer
(DSR) at a specified temperature.
1.2 This standard is appropriate for unaged material, material aged in accordance with Test Method D2872 (RTFO), material
aged in accordance with Practice D6521 (PAV), and material aged in accordance with both Test Method D2872 and Practice
D6521.
NOTE 1—The majority of development work on this test method was performed on material aged in accordance with Test Method D2872 (RTFO).
1.3 The percent recovery is intended to provide a means to determine the presence of elastic response and stress dependence
of polymer modified and unmodified asphalt binders.
1.4A precision and bias statement for this standard has not been developed at this time. Therefore, this standard should not be
used for acceptance or rejection of a material for purchasing purposes.
1.5The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.6
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.
2. Referenced Documents
3
2.1 ASTM Standards:
C670 Practice for Preparing Precision and Bias Statements for Test Methods for Construction Materials
D8 Terminology Relating to Materials for Roads and Pavements
D2872 Test Method for Effect of Heat and Air on a Moving Film of Asphalt (Rolling Thin-Film Oven Test)
D5801 Test Method for Toughness and Tenacity of Bituminous Materials
D6084 Test Method for Elastic Recovery of Bituminous Materials by Ductilometer
D6373 Specification for Performance Graded Asphalt Binder
D6521 Practice for Accelerated Aging of Asphalt Binder Using a Pressurized Aging Vessel (PAV)
D7175 Test Method for Determining the Rheological Properties of Asphalt Binder Using a Dynamic Shear Rheometer
4
2.2 AASHTO Standards:
M 320 Specification for Performance-Graded Asphalt Binder
TP 70 Test Method for Multiple Stress Creep and Recovery (MSCR) of Asphalt Binder Using a Dynamic Shear Rheometer
3. Terminology
3.1 Definitions—For definitions of general terms used in this standard, refer to Terminology D8.
1
ThistestmethodisunderthejurisdictionofASTMCommitteeD04onRoadandPavingMaterialsandisthedirectresponsibilityofSubcommitteeD04.44onRheological
Tests.
Current edition approved Jan.June 1, 2010. Published FebruaryJune 2010. Originally approved in 2008. Last previous edition approved in 20082010 as
D7405–08a.D7405 – 10. DOI: 10.1520/D7405-10A.
2
This test method is based on a work product of the Federal Highway Administration. A similar standard is published as AASHTO TP 70.
3
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM 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.
4
Available from American Association of State Highway and Transportation Officials (AASHTO), 444 N. Capitol St., NW, Suite 249, Washington, DC 20001,
http://www.transportation.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1
---------------------- Page: 1 ----------------------
D7405–10a
3.1.1 creep and recovery, n—a standard rheological test protocol whereby a specimen is subjected to a constant load for a fixed
time period then allowed to recover at zero load for a fixed time period.
3.1.2 non-recoverable creep compliance (J ), n—the residual strain in a specimen after a creep and recovery cycle divided by
nr
...
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