ASTM D6931-17
(Test Method)Standard Test Method for Indirect Tensile (IDT) Strength of Asphalt Mixtures
Standard Test Method for Indirect Tensile (IDT) Strength of Asphalt Mixtures
SIGNIFICANCE AND USE
4.1 The values of IDT strength may be used to evaluate the relative quality of asphalt mixtures in conjunction with laboratory mix design testing and for estimating the potential for rutting or cracking. The results can also be used to determine the potential for field pavement moisture damage when results are obtained on both moisture-conditioned and unconditioned specimens.
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 test method covers procedures for preparing and testing laboratory-fabricated or field-recovered cores of asphalt mixtures to determine the indirect tensile (IDT) strength.
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.
1.4 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.
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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: D6931 − 17
Standard Test Method for
1
Indirect Tensile (IDT) Strength of Asphalt Mixtures
This standard is issued under the fixed designation D6931; 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 D3549/D3549M Test Method for Thickness or Height of
Compacted Bituminous Paving Mixture Specimens
1.1 This test method covers procedures for preparing and
D3666 Specification for Minimum Requirements for Agen-
testing laboratory-fabricated or field-recovered cores of asphalt
cies Testing and Inspecting Road and Paving Materials
mixtures to determine the indirect tensile (IDT) strength.
D4013 Practice for Preparation of Test Specimens of Bitu-
1.2 The values stated in SI units are to be regarded as
minous Mixtures by Means of Gyratory Shear Compactor
standard. No other units of measurement are included in this 3
(Withdrawn 2013)
standard.
D4867/D4867M Test Method for Effect of Moisture on
1.3 This standard does not purport to address all of the
Asphalt Concrete Paving Mixtures
safety concerns, if any, associated with its use. It is the D5581 Test Method for Resistance to Plastic Flow of Bitu-
responsibility of the user of this standard to establish appro-
minous Mixtures Using Marshall Apparatus (6 inch-
priate safety and health practices and determine the applica- Diameter Specimen)
bility of regulatory limitations prior to use.
D6925 Test Method for Preparation and Determination of
1.4 This international standard was developed in accor- the Relative Density ofAsphalt Mix Specimens by Means
dance with internationally recognized principles on standard-
of the Superpave Gyratory Compactor
ization established in the Decision on Principles for the D6926 Practice for Preparation of Asphalt Mixture Speci-
Development of International Standards, Guides and Recom-
mens Using Marshall Apparatus
mendations issued by the World Trade Organization Technical D6927 Test Method for Marshall Stability and Flow of
Barriers to Trade (TBT) Committee.
Asphalt Mixtures
E1 Specification for ASTM Liquid-in-Glass Thermometers
2. Referenced Documents
4
2.2 AASHTO Standards:
2
2.1 ASTM Standards:
AASHTO T 245 Standard Method for Resistance to Plastic
D1074 Test Method for Compressive Strength of Asphalt
Flow of Bituminous Mixtures Using Marshall Apparatus
Mixtures
AASHTO T 312 Standard Method for Preparing and Deter-
D1561/D1561M Practice for Preparation of Bituminous
mining the Density of Hot Mix Asphalt (HMA) Speci-
MixtureTest Specimens by Means of California Kneading
mens by Means of the Superpave Gyratory Compactor
Compactor
D3387 Test Method for Compaction and Shear Properties of 3. Summary of Test Method
Bituminous Mixtures by Means of the U.S. Corps of
3.1 The IDT strength of asphalt mixtures is determined by
Engineers Gyratory Testing Machine (GTM)
loading a cylindrical specimen across its vertical diametral
D3496 Practice for Preparation of Bituminous Mixture
plane at a specified rate of deformation and test temperature.
Specimens for Dynamic Modulus Testing (Withdrawn
The peak load at failure is recorded and used to calculate the
3
2010)
IDT strength of the specimen.
4. Significance and 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
4.1 The values of IDT strength may be used to evaluate the
Fundamental/Mechanistic Tests.
relative quality of asphalt mixtures in conjunction with labo-
Current edition approved July 1, 2017. Published July 2017. Originally approved
ratory mix design testing and for estimating the potential for
in 2007. Last previous edition approved in 2012 as D6931 – 12. DOI: 10.1520/
D6931-17.
rutting or cracking. The results can also be used to determine
2
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
4
the ASTM website. Available from American Association of State Highway and Transportation
3
The last approved version of this historical standard is referenced on Officials (AASHTO), 444 N. Capitol St., NW, Suite 249, Washington, DC 20001,
www.astm.org. http://www.transportation.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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...
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: D6931 − 12 D6931 − 17
Standard Test Method for
Indirect Tensile (IDT) Strength of BituminousAsphalt
1
Mixtures
This standard is issued under the fixed designation D6931; 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 procedures for preparing and testing laboratory-fabricated or field-recovered cores of bitumi-
nousasphalt mixtures to determine the Indirect Tensileindirect tensile (IDT) Strength.strength.
1.2 The within-laboratory repeatability standard deviation, for the recommended rate of loading (50 mm/min) and test
temperature (25ºC), has been determined to be 80 kPa for 101.6 mm diameter specimens, based on 28 labs using either 2 or 4 test
replicates with 11 different mix samples. Additional data is provided in Table for the user’s information. The between-laboratory
reproducibility of this test method is being determined and will be available on or before August 2012. Therefore, this test method
should not be used for acceptance or rejection of materials for purchasing purposes.
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.
1.4 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:
D1074 Test Method for Compressive Strength of Asphalt Mixtures
D1561D1561/D1561M Practice for Preparation of Bituminous Mixture Test Specimens by Means of California Kneading
Compactor
D3387 Test Method for Compaction and Shear Properties of Bituminous Mixtures by Means of the U.S. Corps of Engineers
Gyratory Testing Machine (GTM)
3
D3496 Practice for Preparation of Bituminous Mixture Specimens for Dynamic Modulus Testing (Withdrawn 2010)
D3549D3549/D3549M Test Method for Thickness or Height of Compacted Bituminous Paving Mixture Specimens
D3666 Specification for Minimum Requirements for Agencies Testing and Inspecting Road and Paving Materials
D4013 Practice for Preparation of Test Specimens of Bituminous Mixtures by Means of Gyratory Shear Compactor (Withdrawn
3
2013)
D4867/D4867M Test Method for Effect of Moisture on Asphalt Concrete Paving Mixtures
D5581 Test Method for Resistance to Plastic Flow of Bituminous Mixtures Using Marshall Apparatus (6 inch-Diameter
Specimen)
D6925 Test Method for Preparation and Determination of the Relative Density of Asphalt Mix Specimens by Means of the
Superpave Gyratory Compactor
D6926 Practice for Preparation of Asphalt Mixture Specimens Using Marshall Apparatus
D6927 Test Method for Marshall Stability and Flow of Asphalt Mixtures
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 Feb. 1, 2012July 1, 2017. Published February 2012July 2017. Previous version published in 2007 Originally approved in 2007. Last previous
edition approved in 2012 as D6931– – 12. DOI: 10.1520/D6931-12.10.1520/D6931-17.
2
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.
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
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D6931 − 17
TABLE 1 Single-Laboratory Repeatability and Reproducibility
Standard Standard
Number Specimen Loading Test Average d2s d2s
Deviation Deviation
Source of Data of Diameter Rate Temperature Strength (2.83×SE) (2.83×SE)
Strength Strength
...
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