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ASTM D8044-16

(Test Method)

Standard Test Method for Evaluation of Asphalt Mixture Cracking Resistance using the Semi-Circular Bend Test (SCB) at Intermediate Temperatures

Standard Test Method for Evaluation of Asphalt Mixture Cracking Resistance using the Semi-Circular Bend Test (SCB) at Intermediate Temperatures

SIGNIFICANCE AND USE
5.1 The critical strain energy release rate, Jc, is used to compare the cracking resistance of asphalt mixtures prepared with different binder and aggregate types prepared to meet the volumetric requirements of differing traffic levels tested at intermediate temperatures.  
5.2 This engineering property is a performance indicator of intermediate temperature cracking.  
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 assure 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 the procedures for preparation, testing, and measurement of asphalt mixture cracking resistance at Long Term Pavement Performance (LTPP) database intermediate temperatures using semi-circular bend (SCB) geometry laboratory prepared or pavement core asphalt mix samples tested monotonically. The SCB sample is a half-disk with a notch cut parallel to the loading and vertical axis. The test method describes the determination of the critical strain energy release rate, Jc, and other parameters determined from the load-displacement curve. These parameters can be used to rank the resistance of asphalt mixtures to cracking.  
1.2 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.  
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.4 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.

General Information

Status
Historical
Publication Date
30-Jun-2016
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 D8044-16 - Standard Test Method for Evaluation of Asphalt Mixture Cracking Resistance using the Semi-Circular Bend Test (SCB) at Intermediate TemperaturesASTM D8044-16 - Standard Test Method for Evaluation of Asphalt Mixture Cracking Resistance using the Semi-Circular Bend Test (SCB) at Intermediate Temperatures
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ASTM D8044-16 - Standard Test Method for Evaluation of Asphalt Mixture Cracking Resistance using the Semi-Circular Bend Test (SCB) at Intermediate Temperatures
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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: D8044 − 16
Standard Test Method for
Evaluation of Asphalt Mixture Cracking Resistance using
the Semi-Circular Bend Test (SCB) at Intermediate
1
Temperatures
This standard is issued under the fixed designation D8044; 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 2. Referenced Documents
2
1.1 This test method covers the procedures for preparation, 2.1 ASTM Standards:
testing, and measurement of asphalt mixture cracking resis- D979/D979M Practice for Sampling Bituminous Paving
tance at Long Term Pavement Performance (LTPP) database Mixtures
intermediate temperatures using semi-circular bend (SCB) D2041/D2041M Test Method for Theoretical Maximum
geometry laboratory prepared or pavement core asphalt mix Specific Gravity and Density of Bituminous Paving Mix-
samples tested monotonically. The SCB sample is a half-disk tures
with a notch cut parallel to the loading and vertical axis. The D2726/D2726M Test Method for Bulk Specific Gravity and
test method describes the determination of the critical strain Density of Non-Absorptive Compacted Bituminous Mix-
energy release rate, J , and other parameters determined from tures
c
the load-displacement curve. These parameters can be used to D3203/D3203M Test Method for Percent Air Voids in Com-
rank the resistance of asphalt mixtures to cracking. pacted Asphalt Mixtures
D3666 Specification for Minimum Requirements for Agen-
1.2 The text of this standard references notes and footnotes
cies Testing and Inspecting Road and Paving Materials
which provide explanatory material. These notes and footnotes
D5361/D5361M Practice for Sampling Compacted Asphalt
(excluding those in tables and figures) shall not be considered
Mixtures for Laboratory Testing
as requirements of the standard.
D6373 Specification for Performance Graded Asphalt
1.3 The values stated in SI units are to be regarded as
Binder
standard. No other units of measurement are included in this
D6857/D6857M Test Method for Maximum Specific Grav-
standard.
ity and Density of Bituminous Paving Mixtures Using
1.4 This standard does not purport to address all of the Automatic Vacuum Sealing Method
D6925 Test Method for Preparation and Determination of
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro- the Relative Density of Asphalt Mix Specimens by Means
of the Superpave Gyratory Compactor
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use. E4 Practices for Force Verification of Testing Machines
E29 Practice for Using Significant Digits in Test Data to
1.5 This international standard was developed in accor-
Determine Conformance with Specifications
dance with internationally recognized principles on standard-
E178 Practice for Dealing With Outlying Observations
ization established in the Decision on Principles for the
E399 Test Method for Linear-Elastic Plane-Strain Fracture
Development of International Standards, Guides and Recom-
Toughness K of Metallic Materials
Ic
mendations issued by the World Trade Organization Technical
E2309/E2309M Practices for Verification of Displacement
Barriers to Trade (TBT) Committee.
Measuring Systems and Devices Used in Material Testing
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 July 1, 2016. Published August 2016. DOI: 10.1520/ Standards volume information, refer to the standard’s Document Summary page on
D8044-16. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D8044 − 16
E3029 Practice for Determining Relative Spectral Correc- 6. Apparatus
tion Factors for Emission Signal of Fluorescence Spec-
6.1 Load Test System—A load test system consisting of an
trometers
axial loading device, environmental chamber, and control and
3
2.2 AASHTO Standards:
data acquisition system. The test system shall meet the mini-
R30 Practice for Mixture Conditioning of Hot Mix Asphalt
mum requirements specified in Table 1. (See Practices E2309/
(HMA)
E2309M.)
M320 Standard Specification for Performance-Graded As-
6.1.1 Axial Loading Device—The load apparatus shall be
phalt Binder
capable
...

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SCOPE
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.
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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.
Note 3: For asphalt binders graded by penetration at 25 °C, see Specification D946/D946M. For asphalt binders graded by viscosity at 60 °C, see Specification D3381/D3381M. For performance-graded asphalt binder, see Specification D6373.
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This specification covers asphalt binders graded by performance. Grading designations are related to the average seven-day maximum pavement design temperature, and minimum pavement design temperature. Asphalt binder shall be prepared by the refining of crude petroleum by suitable methods, with or without the addition of modifiers, which may be any organic material of suitable manufacture that is used in virgin or recycled condition, and that is dissolved, dispersed or reacted in asphalt cement to enhance its performance. This specification incorporates an aid for determining the critical low cracking temperature using a combination of test procedures.
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