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ASTM D8237-18

(Test Method)

Standard Test Method for Determining Fatigue Failure of Asphalt-Aggregate Mixtures With the Four-Point Beam Fatigue Device

Standard Test Method for Determining Fatigue Failure of Asphalt-Aggregate Mixtures With the Four-Point Beam Fatigue Device

SIGNIFICANCE AND USE
5.1 The laboratory fatigue life determined by this standard for beam specimens has been used to estimate the fatigue life of asphalt mixture pavement layers under repeated traffic loading. Although the field performance of asphalt mixtures is impacted by many factors (traffic variation, loading rate, and wander; climate variation; rest periods between loads; aging; etc.), it has been more accurately predicted when laboratory properties are known along with an estimate of the strain level induced at the layer depth by the traffic wheel load traveling over the pavement.
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 provides a procedure for determining a fatigue curve that is developed using three or more strain levels. The resulting data can be used in the fatigue models for mechanistic-empirical pavement design (that is, Pavement ME). Failure points are determined for estimating the fatigue life of 380 mm long by 50 mm thick by 63 mm in breadth (width) asphalt mixture beam (rectangular prism) specimens sawed from laboratory or field-compacted asphalt mixture, which are subjected to repeated flexural bending.  
1.2 The largest nominal maximum aggregate size (NMAS) recommended for beams 50 mm thick is 19 mm. Beams made with an NMAS greater than 19 mm might significantly interfere with the material response, thereby affecting the repeatability of the test.  
1.3 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.  
1.4 Units—The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard, with the exception of degrees (°) where angle is specified in accordance with IEEE/ASTM SI 10.  
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

Status
Historical
Publication Date
30-Nov-2018
ICS
93.080.20 - Road construction materials
Technical Committee
D04 - Road and Paving Materials
Drafting Committee
D04.26 - Fundamental/Mechanistic Tests
Current Stage
Ref Project

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ASTM D8237-18 - Standard Test Method for Determining Fatigue Failure of Asphalt-Aggregate Mixtures With the Four-Point Beam Fatigue DeviceASTM D8237-18 - Standard Test Method for Determining Fatigue Failure of Asphalt-Aggregate Mixtures With the Four-Point Beam Fatigue Device
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ASTM D8237-18 - Standard Test Method for Determining Fatigue Failure of Asphalt-Aggregate Mixtures With the Four-Point Beam Fatigue Device
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: D8237 − 18
Standard Test Method for
Determining Fatigue Failure of Asphalt-Aggregate Mixtures
1
With the Four-Point Beam Fatigue Device
This standard is issued under the fixed designation D8237; 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 mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
1.1 Thistestmethodprovidesaprocedurefordetermininga
fatigue curve that is developed using three or more strain
2. Referenced Documents
levels.The resulting data can be used in the fatigue models for
2
2.1 ASTM Standards:
mechanistic-empirical pavement design (that is, Pavement
D8Terminology Relating to Materials for Roads and Pave-
ME). Failure points are determined for estimating the fatigue
ments
life of 380mm long by 50mm thick by 63mm in breadth
D75/D75MPractice for Sampling Aggregates
(width) asphalt mixture beam (rectangular prism) specimens
D140/D140MPractice for Sampling Asphalt Materials
sawed from laboratory or field-compacted asphalt mixture,
D979/D979MPractice for Sampling Bituminous Paving
which are subjected to repeated flexural bending.
Mixtures
1.2 The largest nominal maximum aggregate size (NMAS)
D2041/D2041MTest Method for Theoretical Maximum
recommended for beams 50mm thick is 19mm. Beams made
Specific Gravity and Density of Bituminous Paving Mix-
with an NMAS greater than 19mm might significantly inter-
tures
fere with the material response, thereby affecting the repeat-
D2726/D2726MTest Method for Bulk Specific Gravity and
ability of the test.
Density of Non-Absorptive Compacted Asphalt Mixtures
1.3 The text of this standard references notes and footnotes
D3203/D3203MTest Method for PercentAirVoids in Com-
whichprovideexplanatorymaterial.Thesenotesandfootnotes
pacted Asphalt Mixtures
(excluding those in tables and figures) shall not be considered
D3549/D3549MTest Method for Thickness or Height of
as requirements of the standard.
Compacted Asphalt Mixture Specimens
D3666Specification for Minimum Requirements for Agen-
1.4 Units—The values stated in SI units are to be regarded
cies Testing and Inspecting Road and Paving Materials
asstandard.Nootherunitsofmeasurementareincludedinthis
D5361/D5361MPractice for Sampling Compacted Asphalt
standard, with the exception of degrees (°) where angle is
Mixtures for Laboratory Testing
specified in accordance with IEEE/ASTM SI 10.
D7981Practice for Compaction of PrismaticAsphalt Speci-
1.5 This standard does not purport to address all of the
mens by Means of the Shear Box Compactor
safety concerns, if any, associated with its use. It is the
D8079Practice for Preparation of Compacted Slab Asphalt
responsibility of the user of this standard to establish appro-
Mix Samples Using a Segmented Rolling Compactor
priate safety, health, and environmental practices and deter-
E4Practices for Force Verification of Testing Machines
mine the applicability of regulatory limitations prior to use.
E29Practice for Using Significant Digits in Test Data to
1.6 This international standard was developed in accor-
Determine Conformance with Specifications
dance with internationally recognized principles on standard-
E2309/E2309MPractices for Verification of Displacement
ization established in the Decision on Principles for the
Measuring Systems and Devices Used in MaterialTesting
Development of International Standards, Guides and Recom-
Machines
1
This test method is under the jurisdiction of ASTM Committee D04 on Road
2
and Paving Materials and is the direct responsibility of Subcommittee D04.26 on For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Fundamental/Mechanistic Tests. contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Current edition approved Dec. 1, 2018. Published December 2018. Originally Standards volume information, refer to the standard’s Document Summary page on
approved in 2018. DOI: 10.1520/D8237-18. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D8237 − 18
IEEE/ASTM SI 10American National Standard for Metric 3.2 Fordefinitionsofothertermsusedinthisstandard,refer
Practice to Terminology D8.
3
2.2 AASHTO Standard:
4. Summary of Test Method
R30StandardPracticeforMixtureConditioningofHot-Mix
4.1 The four-point flexural bending test method is con-
Asphalt (HMA)
ducted on compacted beam specimens to evaluate the fatigue
3. Terminology
properties of viscoelastic asphalt mixtures using a fixed refer-
ence point bending beam fix
...

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1.1 This specification2 covers asphalt binders graded by performance. Grading designations are related to the LTPPBind Online calculated maximum pavement design temperature, the minimum pavement design temperature, and the traffic loading.
Note 1: For more information on LTPPBind Online, see https://infopave.fhwa.dot.gov/Tools/LTPPBindOnline accessed May 23, 2023.  
1.2 This specification incorporates Test Method D7405 for determining non-recoverable creep compliance, Jnr. “S,” “H,” “V,” or “E” designations must be specified for standard, heavy, very heavy, and extremely heavy traffic loading, respectively.  
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Note 2: A guidance document for specifying bodies using R % for elastic properties is under development.
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