ASTM D6925-06
(Test Method)Standard Test Method for Preparation and Determination of the Relative Density of Hot Mix Asphalt (HMA) Specimens by Means of the Superpave Gyratory Compactor
Standard Test Method for Preparation and Determination of the Relative Density of Hot Mix Asphalt (HMA) Specimens by Means of the Superpave Gyratory Compactor
SCOPE
1.1 This test method covers the compaction of cylindrical specimens of hot mix asphalt (HMA) using the Superpave Gyratory Compactor (SGC). This standard also refers to the determination of the relative density of the compacted specimens at any point in the compaction process. Compacted specimens are suitable for volumetric and physical property testing.
1.2 The values stated in SI units are to be regarded as the standard.
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.
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Designation:D6925–06
Standard Test Method for
Preparation and Determination of the Relative Density of
Hot Mix Asphalt (HMA) Specimens by Means of the
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Superpave Gyratory Compactor
This standard is issued under the fixed designation D 6925; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope AASHTO PP2 Practice for Short and Long Term Aging of
Hot Mix Asphalt (HMA).
1.1 This test method covers the compaction of cylindrical
AASHTO PP35 Provisional Practice for Evaluation of Su-
specimens of hot mix asphalt (HMA) using the Superpave
perpave Gyratory Compactors (SGCs)
Gyratory Compactor (SGC). This standard also refers to the
AASHTO PP48 Practice for Evaluation of Superpave Gy-
determination of the relative density of the compacted speci-
ratory Compactor (SGC) Internal Angle of Gyration
mens at any point in the compaction process. Compacted
AASHTO T312 Preparing and Determining the Density of
specimens are suitable for volumetric and physical property
Hot-Mix Asphalt (HMA) Specimens by means of the
testing.
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Superpave Gyratory Compactor
1.2 The values stated in SI units are to be regarded as the
2.3 Other References:
standard.
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ANSI B46.1 American National Standards Institute
1.3 This standard does not purport to address all of the
Asphalt Institute MS-2 Mix Design Methods for Asphalt
safety concerns, if any, associated with its use. It is the
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Concrete
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
3. Significance and Use
bility of regulatory limitations prior to use.
3.1 This test method is used to prepare specimens for
2. Referenced Documents determining the volumetric and physical properties of com-
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pacted HMA mix.
2.1 ASTM Standards:
3.2 This test method is useful for monitoring the density of
D 1188 Test Method for Bulk Specific Gravity and Density
test specimens during the compaction process. This test
of Compacted Bituminous Mixtures Using Coated
method is suited for the laboratory design and field control of
Samples
HMA.
D 2041 Test Method for Theoretical Maximum Specific
Gravity and Density of Bituminous Paving Mixtures
4. Apparatus
D 2726 Test Method for Bulk Specific Gravity and Density
4.1 Superpave Gyratory Compactor—An electromechani-
of Non-Absorptive Compacted Bituminous Mixtures
cal, electro-hydraulic, or electro-pneumatic compactor com-
D 4402 TestMethodforViscosityDeterminationofAsphalt
prised of the following system components: (1) reaction frame,
at Elevated Temperatures Using a Rotational Viscometer
and drive motor, (2) loading system, loading ram, and pressure
D 4753 Guide for Evaluating, Selecting, and Specifying
indicator, (3) recording system for height measurement and
Balances and Standard Masses for Use in Soil, Rock, and
number of gyrations, and (4) mold and base plate.
Construction Materials Testing
3 4.1.1 The reaction frame shall provide a non-compliant
2.2 AASHTO Standards:
structure against which the vertical loading ram can push when
compacting specimens. Reaction bearings shall be capable of
creating, and firmly maintaining during the compaction pro-
1
This test method is under the jurisdiction of ASTM Committee D04 on Road
cess, an external angle of gyration of 21.8 6 0.4 mrad (1.25 6
and Paving Materials and is the direct responsibility of Subcommittee D04.20 on
0.02 degrees).
Mechanical Tests of Bituminous Mixtures.
Current edition approved Aug. 1, 2006. Published August 2006. Originally
NOTE 1—Research has shown external angle (measurement between
approved in 2003. Last previous edition approved in 2003 as D 6925 – 03.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
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Standards volume information, refer to the standard’s Document Summary page on Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St.,
the ASTM website. 4th Floor, New York, NY 10036.
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Available from American Association of State Highway and Transportation Available from the Asphalt Institute (AI), 2696 Research Park Dr., Lexington,
Officials (AASHTO), 444 N. Capitol St., NW, Suite 249, Washington, DC 20001. KY 40511.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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D6925–06
the external mold wall and the frame of the compactor) to be different
6.5. At least one more oven shall be available for heating
from the internal angle (measurement between internal mold wall a
...
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