ASTM D6752-02a

NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: D 6752 – 02a
Standard Test Method for
Bulk Specific Gravity and Density of Compacted Bituminous
1
Mixtures Using Automatic Vacuum Sealing Method
This standard is issued under the fixed designation D 6752; 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 air voids. These values in turn may be used in determining the
relative degree of compaction.
1.1 This test method covers the determination of bulk
3.2 Since specific gravity has no units, it must be converted
specific gravity of compacted bituminous mixtures by the
to density in order to do calculations that require units. This
vacuum sealing method.
conversion is made by multiplying the specific gravity at a
1.2 This method can be used for compacted cylindrical and
given temperature by the density of water at the same tempera-
cubical bituminous laboratory and field specimens.
ture.
1.3 The bulk specific gravity of the compacted bituminous
3.3 This method can be used for 100 mm and 150 mm
mixtures may be used in calculating the unit weight of the
diameter cylindrical as well as cubical asphalt specimens to
mixture.
correct for absorptive and open graded mixes. Mixes such as
1.4 This standard does not purport to address all of the
Stone Matrix Asphalt (SMA), porous friction coarse, and
safety concerns, if any, associated with its use. It is the
Superpave coarse graded mixes with significant surface texture
responsibility of the user of this standard to establish appro-
and interconnected voids should be sealed for accurate bulk
priate safety and health practices and determine the applica-
specific density results. Follow manufacturer recommendation
bility of regulatory requirements prior to use.
for appropriate bag sizes to be utilized with cubical and
5
2. Referenced Documents
abnormally shaped samples.
2.1 ASTM Standards:
4. Apparatus
C 670 Practice for Preparing Precision and Bias Statements
2
4.1 Balance, with ample capacity, and with sufficient sensi-
for Test Methods for Construction Materials
3
tivity to enable bulk specific gravity of specimens to be
D 979 Practice for Sampling Bituminous Paving Mixtures
calculated to at least four significant figures, that is to at least
D 1461 Test Method for Moisture or Volatile Distillates in
3
three decimal places. It shall be equipped with a suitable
Bituminous Paving Mixtures
apparatus to permit weighing the specimen while it is sus-
D 2726 Test Method for Bulk Specific Gravity and Density
3
pended in water. The balance shall conform to Guide D 4753 as
of Non-Absorptive Compacted Bituminous Mixtures
a class GP2 balance.
D 3203 Test Method for Percent Air Voids in Compacted
3
Dense and Open Bituminous Paving Mixtures
NOTE 1—Since there are no more significant figures in the quotient
D 4753 Guide for Evaluating, Selecting, and Specifying
(bulk specific gravity) than appear in either the dividend (the mass of the
specimen in air) or in the divisor (the volume of the specimen, obtained
Balances and Standard Masses for Use in Soil, Rock, and
4
from the difference in mass of the specimen in air and in water), this
Construction Materials Testing
means that the balance must have a sensitivity capable of providing both
mass and volume values to at least four figures. For example, a sensitivity
3. Significance and Use
of 0.1 g would provide four significant figures for the determination of a
3.1 The results obtained from this method can be used to
mass in the range from 130.0 to 999.9 g when the specific gravity is 2.300.
determine the unit weight of compacted bituminous mixtures
4.2 Water Bath, with minimum dimensions (Length 3
and in conjunction with Test Method D 3203, to obtain percent
Width 3 Depth) of 610 3 460 3 460 mm (24 3 18 3 18 in.)
1
This test method is under the jurisdiction of ASTM Committee D04 on Road
5
and Paving Materials and is the direct responsibility of Subcommittee D04.21 on Bulk specific gravity determined by this method may be lower than the results
Specific Gravity and Density of Bituminous Mixtures. obtained by Test Method D 2726. As a result, air voids determined from these bulk
Current edition approved Dec. 10, 2002. Published January 2003. Originally specific gravity values may be higher than the air voids values determined using Test
approved in 2002. Last previous edition approved in 2002 as D 6752-02. Method D 2726. These differences may be more pronounced for coarse aggregate
2
Annual Book of ASTM Standards, Vol 04.02. mixtures. Users of this method are cautioned to evaluate any alteration in percent
3
Annual Book of ASTM Standards, Vol 04.03. asphalt content or aggregate
...