ASTM D6926-16

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Designation: D6926 − 10 D6926 − 16
Standard Practice for
Preparation of Bituminous Asphalt Mixture Specimens
1
Using Marshall Apparatus
This standard is issued under the fixed designation D6926; 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
1.1 This practice covers preparation and compaction of 102 mm (4 in.)4 in. (101.6 mm) diameter by nominal 64 mm (2.5 in.)
2.5 in. (63.5 mm) high cylindrical bituminous paving mixture specimens by means of the original manual Marshall method and
subsequent variations of the method (Test Method asphalt paving mixture specimens. D6927). This practice is intended for use with
laboratory and plant produced bituminous plant-produced asphalt mixtures with aggregate up to 25 mm (1 in.) 1 in. (25.4 mm)
maximum size and for recompaction of asphalt pavement paving mixture samples.
1.2 There are three types of Marshall compaction apparatus in use. The following types of hammer arrangements are included
in this practice:
1.2.1 Manually held hammer handle is attached to a flat compaction foot through a spring loaded spring-loaded swivel and is
hand operated (original standard developed by the United States Army Corps of Engineers).
1.2.2 Hammer handle restrained laterally (fixed) but not vertically, attached to a flat compaction foot through a spring loaded
spring-loaded swivel and is either mechanically or hand operated. There may or may not be a constant surcharge on top of the
hammer handle. Mechanical hammers are available that operate at (1) nominal 55 blows per minute andor (2) equal to or greater
than 75 blows per minute.
1.2.3 Hammer handle restrained laterally (fixed) with constant surcharge on top of hammer, is attached to a slanted compaction
foot, foot on a rotating mold base, and is mechanically operated. This method must be used as a referee method.
1.3 Although the mass and height of mass drop for each apparatus are the same, density achieved in compacted specimens with
the same number of blows will be different. It is up to the user owner or specifier to establish the specific required number of blows
to be used for compaction of the specimen in relation to the field.
1.4 Units—The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are
mathematical conversions to SI units that are provided for information only and are not considered standard.
1.5 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.
2. Referenced Documents
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2.1 ASTM Standards:
D2493D8 Standard Viscosity-Temperature Chart for AsphaltsTerminology Relating to Materials for Roads and Pavements
D3666 Specification for Minimum Requirements for Agencies Testing and Inspecting Road and Paving Materials
D4402 Test Method for Viscosity Determination of Asphalt at Elevated Temperatures Using a Rotational Viscometer
D6927 Test Method for Marshall Stability and Flow of Asphalt Mixtures
E1 Specification for ASTM Liquid-in-Glass Thermometers
E11 Specification for Woven Wire Test Sieve Cloth and Test Sieves
E77 Test Method for Inspection and Verification of Thermometers
E2251 Specification for Liquid-in-Glass ASTM Thermometers with Low-Hazard Precision Liquids
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This practice is under the jurisdiction of ASTM Committee D04 on Road and Paving Materials and is the direct responsibility of Subcommittee D04.20 on Mechanical
Tests of BituminousAsphalt Mixtures.
Current edition approved June 15, 2010Dec. 15, 2016. Published September 2010January 2017. Originally approved in 2004. Last previous edition approved in 20042010
as D6926–04D6926 – 10. DOI: 10.1520/D6926-10.10.1520/D6926-16.
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D6926 − 16
3. Terminology
3.1 Definitions:
3.1.1 For definitions of terms used in this practice, refer to Terminology D8.
3.2 Definitions of Term
...