Standard Test Method for Preparation and Determination of the Relative Density of Hot Mix Asphalt (HMA) Specimens by Means of the Superpave Gyratory Compactor

SIGNIFICANCE AND USE
This test method is used to prepare specimens for determining the volumetric and physical properties of compacted HMA mix.
This test method is useful for monitoring the density of test specimens during the compaction process. This test method is suited for the laboratory design and field control of HMA.
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.
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.
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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Publication Date
14-Sep-2007
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ASTM D6925-07 - Standard Test Method for Preparation and Determination of the Relative Density of Hot Mix Asphalt (HMA) Specimens by Means of the Superpave Gyratory Compactor
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:D6925–07
Standard Test Method for
Preparation and Determination of the Relative Density of
Hot Mix Asphalt (HMA) Specimens by Means of the
1
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 Construction Materials Testing
3
2.2 AASHTO Standards:
1.1 This test method covers the compaction of cylindrical
AASHTO PP2 Practice for Short and Long Term Aging of
specimens of hot mix asphalt (HMA) using the Superpave
Hot Mix Asphalt (HMA).
Gyratory Compactor (SGC). This standard also refers to the
AASHTO PP35 Provisional Practice for Evaluation of Su-
determination of the relative density of the compacted speci-
perpave Gyratory Compactors (SGCs)
mens at any point in the compaction process. Compacted
AASHTO PP48 Practice for Evaluation of Superpave Gy-
specimens are suitable for volumetric and physical property
ratory Compactor (SGC) Internal Angle of Gyration
testing.
AASHTO T312 Preparing and Determining the Density of
1.2 The values stated in SI units are to be regarded as the
Hot-Mix Asphalt (HMA) Specimens by means of the
standard.
3
Superpave Gyratory Compactor
1.3 The text of this standard references notes and footnotes
2.3 Other References:
which provide explanatory material. These notes and footnotes
4
ANSI B46.1 American National Standards Institute
(excluding those in tables and figures) shall not be considered
Asphalt Institute MS-2 Mix Design Methods for Asphalt
as requirements of the standard.
5
Concrete
1.4 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
3. Significance and Use
responsibility of the user of this standard to establish appro-
3.1 This test method is used to prepare specimens for
priate safety and health practices and determine the applica-
determining the volumetric and physical properties of com-
bility of regulatory limitations prior to use.
pacted HMA mix.
2. Referenced Documents 3.2 This test method is useful for monitoring the density of
2 test specimens during the compaction process. This test
2.1 ASTM Standards:
method is suited for the laboratory design and field control of
D 1188 Test Method for Bulk Specific Gravity and Density
HMA.
of Compacted Bituminous Mixtures Using Coated
Samples
4. Apparatus
D 2041 Test Method for Theoretical Maximum Specific
4.1 Superpave Gyratory Compactor—An electromechani-
Gravity and Density of Bituminous Paving Mixtures
cal, electro-hydraulic, or electro-pneumatic compactor com-
D 2726 Test Method for Bulk Specific Gravity and Density
prised of the following system components: (1) reaction frame,
of Non-Absorptive Compacted Bituminous Mixtures
and drive motor, (2) loading system, loading ram, and pressure
D 4402 TestMethodforViscosityDeterminationofAsphalt
indicator, (3) recording system for height measurement and
at Elevated Temperatures Using a Rotational Viscometer
number of gyrations, and (4) mold and base plate.
D 4753 Guide for Evaluating, Selecting, and Specifying
4.1.1 The reaction frame shall provide a non-compliant
Balances and Standard Masses for Use in Soil, Rock, and
structure against which the vertical loading ram can push when
compacting specimens. Reaction bearings shall be capable of
1
This test method is under the jurisdiction of ASTM Committee D04 on Road
and Paving Materials and is the direct responsibility of Subcommittee D04.20 on
3
Mechanical Tests of Bituminous Mixtures. Available from American Association of State Highway and Transportation
Current edition approved Sept. 15, 2007. Published October 2007. Originally Officials (AASHTO), 444 N. Capitol St., NW, Suite 249, Washington, DC 20001,
approved in 2003. Last previous edition approved in 2006 as D 6925 – 06. http://www.transportation.org.
2 4
For referenced ASTM standards, visit the ASTM website, www.astm.org, or Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St.,
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM 4th Floor, New York, NY 10036, http://www.ansi.org.
5
Standards volume information, refer to the standard’s Document Summary page on Available from the Asphalt Institute (AI), 2696 Research Park Dr., Lexington,
the ASTM website. KY 40511.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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D6925–07
creating, and firmly maintaining during the compaction pro- 4.5 Balance—The balance shall have a minimum capacity
cess, a
...

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