ASTM D6723-12

Standard Test Method for Determining the Fracture Properties of Asphalt Binder in Direct Tension (DT) (Withdrawn 2021)

SIGNIFICANCE AND USE
Stress at failure is used in a mechanistic pavement cracking model to compute critical cracking temperature. The procedure to compute critical cracking temperature is described in Practice D6521. The critical cracking temperature is then used in specifying the low temperature grade of asphalt binder in accordance with Specification D6373.
The test method is designed to measure the strength of the asphalt binder at the critical cracking temperature. The asphalt binder has limited ability to resist stress without cracking. In the asphalt binder Specification D6373, failure stress is used to determine the critical cracking temperature.
For evaluating an asphalt binder for conformance to Specification D6373, the elongation rate of the gage section is 1.0 mm/min and the test temperature is selected from Table number 1 of Specification D6373 according to the grade of asphalt binder. Other rates of elongation and test temperatures may be used to test asphalt binders.
SCOPE
1.1 This test method covers the determination of the failure strain and failure stress of asphalt binders by means of a direct tension test. It can be used with unaged material or with material aged using Test Method D2872 (RTFOT), Practice D6521 (PAV), or AASHTO T240 (RTFOT) and AASHTO PP1 (PAV). The test apparatus is designed for testing within the temperature range from +6 to -36°C.
1.2 This test method is limited to asphalt binders containing particulate material having dimensions less than 250 µm.
1.3 The values stated in SI units are to be regarded as the 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.
WITHDRAWN RATIONALE
This test method covered the determination of the failure strain and failure stress of asphalt binders by means of a direct tension test.
Formerly under the jurisdiction of Committee D04 on Road and Paving Materials, this test method was withdrawn in January 2021 in accordance with section 10.6.3 of the Regulations Governing ASTM Technical Committees, which requires that standards shall be updated by the end of the eighth year since the last approval date.

General Information

• Status: Withdrawn
• Publication Date: 31-Jan-2012
• Withdrawal Date: 20-Jan-2021
• ICS: 91.100.50 - Binders. Sealing materials
• ICS: 93.080.20 - Road construction materials
• Technical Committee: D04 - Road and Paving Materials
• Drafting Committee: D04.44 - Rheological Tests

Standards Content (Sample)

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: D6723 − 12
Standard Test Method for
Determining the Fracture Properties of Asphalt Binder in
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Direct Tension (DT)
This standard is issued under the fixed designation D6723; 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 E4 Practices for Force Verification of Testing Machines
E77 Test Method for Inspection and Verification of Ther-
1.1 This test method covers the determination of the failure
mometers
strain and failure stress of asphalt binders by means of a direct
E83 Practice for Verification and Classification of Exten-
tension test. It can be used with unaged material or with
someter Systems
material aged using Test Method D2872 (RTFOT), Practice
E220 Test Method for Calibration of Thermocouples By
D6521 (PAV), orAASHTO T240 (RTFOT) andAASHTO PP1
Comparison Techniques
(PAV). The test apparatus is designed for testing within the
E691 Practice for Conducting an Interlaboratory Study to
temperature range from +6 to -36°C.
Determine the Precision of a Test Method
1.2 This test method is limited to asphalt binders containing
2.2 Deutche Industrie Norm (DIN) Standard:
particulate material having dimensions less than 250 µm. 3
43760 Standard for Calibrating Thermocouples
1.3 The values stated in SI units are to be regarded as the 2.3 AASHTO Standards:
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standard.
T 240
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PPI (PAV)
1.4 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
3. Terminology
responsibility of the user of this standard to establish appro-
3.1 Definitions—Fordefinitionsofgeneraltermsusedinthis
priate safety and health practices and determine the applica-
standard, refer to Terminology D8.
bility of regulatory limitations prior to use.
3.2 Definitions of Terms Specific to This Standard:
2. Referenced Documents
3.2.1 brittle, adj—type of failure in a direct tension test
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2.1 ASTM Standards:
wherethestress-straincurveisessentiallylinearuptothepoint
C670 Practice for Preparing Precision and Bias Statements
of failure and the failure is by sudden rupture of the test
for Test Methods for Construction Materials
specimen without appreciable reduction in cross-section of the
D8 Terminology Relating to Materials for Roads and Pave-
specimen.
ments
3.2.2 brittle-ductile, adj—type of failure in a direct tension
D140 Practice for Sampling Bituminous Materials
test where the stress-strain curve is curvilinear and the failure
D2872 Test Method for Effect of Heat and Air on a Moving
is by sudden rupture of the test specimen. Limited reduction in
Film of Asphalt (Rolling Thin-Film Oven Test)
cross-section of the specimen occurs before rupture.
D6373 Specification for Performance Graded Asphalt
3.2.3 ductile, adj—type of failure in a direct tension test
Binder
where the specimen does not rupture but fails by flow at large
D6521 Practice for Accelerated Aging of Asphalt Binder
strains.
Using a Pressurized Aging Vessel (PAV)
3.2.4 effective gage length, n—for specimens used in this
E1 Specification for ASTM Liquid-in-Glass Thermometers
test, the effective gauge length, L , has been determined to be
e
33.8 mm. This is an effective gauge length that represents the
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This test method is under the jurisdiction of ASTM Committee D04 on Road
portion of the specimen that contributes to the majority of the
and Paving Materials and is the direct responsibility of Subcommittee D04.44 on
strain.
Rheological Tests.
Current edition approved Feb. 1, 2012. Published April 2012. Originally
approved in 2001. Last previous edition approved in 2002 as D6723 – 02 which was
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withdrawn January 2011 and reinstated in February 2012. DOI: 10.1520/D6723-12. Deutsches Institut fur Normung e.V. (German Standards Institute), Beuth
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or Verlag GmbH, Burggrafenstrasse 6, 10787, Berlin Germany.
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contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Available from American Association of State Highway and Transportation
Standards volume information, refer to the standard’s Document Summary page on Officials (AASHTO), 444 N. Capitol St., NW, Suite 249, Washington, DC 20001,
the ASTM website. http://www.transportation.org.
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D6723 − 12
3.2.5 failure, n—point at which the tensile load reaches a 5.3 For evaluating an asphalt binder for conformance to
maximumvalueasthetestspecimenispulledataconstantrate Specification D6373, the elongation rate of the g
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