ASTM D7369-20
(Test Method)Standard Test Method for Determining the Resilient Modulus of Asphalt Mixtures by Indirect Tension Test
Standard Test Method for Determining the Resilient Modulus of Asphalt Mixtures by Indirect Tension Test
SIGNIFICANCE AND USE
5.1 Resilient modulus can be used in the evaluation of materials quality and as input for pavement design, evaluation, and analysis. With this method, the effects of temperature and load on resilient modulus can also be investigated. This modulus test can be run on pavement cores because of specimen orientation.
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 resilient modulus values using a repeated-load indirect tension test.
1.2 The values stated in SI units are regarded as the standard. Values in parentheses are for informational use.
1.3 A 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.
1.4 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.
1.5 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.6 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
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: D7369 − 20
Standard Test Method for
Determining the Resilient Modulus of Asphalt Mixtures by
1
Indirect Tension Test
This standard is issued under the fixed designation D7369; 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 D3666Specification for Minimum Requirements for Agen-
cies Testing and Inspecting Road and Paving Materials
1.1 This test method covers procedures for preparing and
D6925Test Method for Preparation and Determination of
testinglaboratory-fabricatedorfield-recoveredcoresofasphalt
the Relative Density ofAsphalt Mix Specimens by Means
mixtures to determine resilient modulus values using a
of the Superpave Gyratory Compactor
repeated-load indirect tension test.
D6926Practice for Preparation of Asphalt Mixture Speci-
1.2 The values stated in SI units are regarded as the
mens Using Marshall Apparatus
standard. Values in parentheses are for informational use.
D6931Test Method for Indirect Tensile (IDT) Strength of
1.3 Aprecision and bias statement for this standard has not Asphalt Mixtures
2.2 Other Document:
beendevelopedatthistime.Therefore,thisstandardshouldnot
beusedforacceptanceorrejectionofamaterialforpurchasing NCHRP Project 1-28AResearch Results Digest Number
285—Laboratory Determination of Resilient Modulus for
purposes.
Flexible Pavement Design, January 2004
1.4 The text of this standard references notes and footnotes
which provide explanatory material.These notes and footnotes
3. Terminology
(excluding those in tables and figures) shall not be considered
3.1 Definitions—Definitions are in accordance with Termi-
as requirements of the standard.
nology D8.
1.5 This standard does not purport to address all of the
3.2 Definitions of Terms Specific to This Standard:
safety concerns, if any, associated with its use. It is the
3.2.1 contact load (P ), n—the vertical load placed on
contact
responsibility of the user of this standard to establish appro-
the specimen to maintain a positive contact between the
priate safety, health, and environmental practices and deter-
loading strip and the specimen. The suggested contact load is
mine the applicability of regulatory limitations prior to use.
8%ofthemaximumload(0.08 P ).Thecontactloadshould
max
1.6 This international standard was developed in accor-
be not less than 22.2 N (5 lb) and no more than 89.0 N (20 lb).
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the 3.2.2 core, n—an intact cylindrical specimen of pavement
material, which is removed from the pavement by drilling and
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical sampling at the designated location. A core may consist of or
include one, two, or more than two different layers.
Barriers to Trade (TBT) Committee.
3.2.3 cyclic load (resilient vertical load, P ), n—load
cyclic
2. Referenced Documents
applied to a specimen, which is directly used to calculate
2
2.1 ASTM Standards:
resilient modulus.
D8Terminology Relating to Materials for Roads and Pave-
P 5 P 2 P (1)
cyclic max contact
ments
3.2.4 haversine-shaped load form, n—the required load
pulse for the resilient modulus test. The load pulse is in the
1
This test method is under the jurisdiction of ASTM Committee D04 on Road
form (1-cos θ)/2 with the cyclic load varying from the contact
and Paving Materials and is the direct responsibility of Subcommittee D04.26 on
load (P ) to the maximum load (P ).
Fundamental/Mechanistic Tests. contact max
Current edition approved Nov. 1, 2020. Published December 2020. Originally
3.2.5 instantaneous resilient modulus, n—determined from
approvedin2009.Lastpreviouseditionapprovedin2011asD7369–11,whichwas
the deformation-time plots (both horizontal and vertical) as
withdrawn January 2020 and reinstated in November 2020. DOI: 10.1520/D7369-
described in Section 10.
20.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
3.2.6 lift, n—that part of the pavement produced with
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
similar material and placed with similar equipment and tech-
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. niques. The lift thickness is the thickness of the compacted
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