ASTM D2726-05a

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Designation: D 2726 – 05a
Standard Test Method for
Bulk Specific Gravity and Density of Non-Absorptive
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Compacted Bituminous Mixtures
This standard is issued under the fixed designation D 2726; 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.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope* D 5361 Practice for Sampling Compacted Bituminous Mix-
tures for Laboratory Testing
1.1 This test method covers the determination of bulk
D 6752 Test Method for Bulk Specific Gravity and Density
specific gravity and density of specimens of compacted bitu-
of Compacted Bituminous Mixtures Using Automatic
minous mixtures.
Vacuum Sealing Method
1.2 This test method should not be used with samples that
contain open or interconnecting voids or absorb more than 2 %
3. Terminology
of water by volume, or both, as determined in 10.3.
3.1 Definitions of Terms Specific to This Standard:
1.3 The values stated in SI units are to be regarded as the
3.1.1 bulk density—as determined by this test method, the
standard. The values given in parentheses are for information
mass of a metre cubed (or foot cubed) of the material at 25°C
only.
(77°F).
1.4 This standard does not purport to address all of the
3.1.2 bulk specific gravity—as determined by this test
safety concerns, if any, associated with its use. It is the
method, the ratio of the mass of a given volume of material at
responsibility of the user of this standard to establish appro-
25°C to the mass of an equal volume of water at the same
priate safety and health practices and determine the applica-
temperature.
bility of regulatory limitations prior to use.
4. Summary of Test Method
2. Referenced Documents
2 4.1 The specimen is immersed in a water bath at 25°C
2.1 ASTM Standards:
(77°F). The mass under water is recorded, and the specimen is
D 979 Practice for Sampling Bituminous Paving Mixtures
takenoutofthewater,blottedquicklywithadampclothtowel,
D 1188 Test Method for Bulk Specific Gravity and Density
and weighed in air. The difference between the two masses is
ofCompactedBituminousMixturesUsingParaffin-Coated
used to measure the mass of an equal volume of water at 25°C.
Specimens
4.2 This test method provides guidance for determination of
D 3203 Test Method for Percent Air Voids in Compacted
the oven dry or thoroughly dry mass of the specimen.The bulk
Dense and Open Bituminous Paving Mixtures
specific gravity is calculated from these masses. Then the
D 3666 SpecificationforMinimumRequirementsforAgen-
density is obtained by multiplying the specific gravity of the
cies Testing and Inspecting Road and Paving Materials
specimen by the density of the water.
D 4753 Specification for Evaluating, Selecting, and Speci-
fyingBalancesandStandardMassesforUseinSoil,Rock,
5. Significance and Use
and Construction Materials Testing
5.1 The results obtained from this test method can be used
to determine the unit weight of compacted dense bituminous
mixtures and in conjunction with Test Method D 3203,to
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This test method is under the jurisdiction of ASTM Committee D04 on Road
obtain percent air voids. These values in turn may be used in
and Paving Materials and is the direct responsibility of Subcommittee D04.21 on
determining the relative degree of compaction.
Specific Gravity and Density of Bituminous Mixtures.
5.2 Since specific gravity has no units, it must be converted
Current edition approved Sept. 15, 2005. Published September 2005. Originally
approved in 1968. Last previous edition approved in 2005 as D 2726–05.
to density in order to do calculations that require units. This
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
conversion is made by multiplying the specific gravity at a
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
given temperature by the density of water at the same tempera-
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. ture.
*A Summary of Changes section appears at the end of this standard.
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D 2726 – 05a
NOTE 1—The personnel and equipment used in performing this test can
thoroughly dry (that is, laboratory-prepared dried specimens),
be evaluated in accordance with Practice D 3666.
are to be tested in accordance with 9.2.All others are assumed
to contain moisture or solvent and are to be tested in accor-
6. Apparatus
dance with 9.1. The sequence of testing for 9.
...