ASTM D7369-20

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
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United
...