ASTM D3142-05
(Test Method)Standard Test Method for Specific Gravity, API Gravity, or Density of Cutback Asphalts by Hydrometer Method
Standard Test Method for Specific Gravity, API Gravity, or Density of Cutback Asphalts by Hydrometer Method
SIGNIFICANCE AND USE
Accurate determination of the density, specific gravity, or API gravity of cutback asphalts is necessary for the conversion of measured volumes to volumes at the standard temperature of 15°C or 60°F.
Similarly, accurate determination is necessary for converting volumes to mass as required in other ASTM tests on cutback asphalts.
Values corrected to 15°C and 60°F will be different because the two temperatures are not equal.
SCOPE
1.1 This test method covers the laboratory determination, using a glass hydrometer, of the density, specific gravity, or API gravity of cutback asphalts as defined in Specifications D 2026, D 2027, and D 2028 (Note 1). Values are measured on a hydrometer at convenient temperatures, readings of density, specific gravity, and API gravity being reduced to 15°C or 60°F by means of international standard tables. By means of these same tables, values determined in one of the three systems of measurement are convertible to equivalent values in either system so that measurements may be made in the units of local convenience.
Note 1—This test method is applicable to cutback asphalts and in general follows, but provides more explicit routines than, the procedure outlined in Test Method D 1298.
1.2 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.
1.3 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. Specific precautionary statements are given in Section 7.
General Information
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Standards Content (Sample)
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Designation: D3142 – 05
Standard Test Method for
Specific Gravity, API Gravity, or Density of Cutback Asphalts
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by Hydrometer Method
This standard is issued under the fixed designation D3142; 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 D1250 GuideforUseofthePetroleumMeasurementTables
D1298 Test Method for Density, Relative Density (Specific
1.1 This test method covers the laboratory determination,
Gravity), or API Gravity of Crude Petroleum and Liquid
using a glass hydrometer, of the density, specific gravity, or
Petroleum Products by Hydrometer Method
API gravity of cutback asphalts as defined in Specifications
D2026 Specification for Cutback Asphalt (Slow-Curing
D2026, D2027, and D2028 (Note 1). Values are measured on a
Type)
hydrometer at convenient temperatures, readings of density,
D2027 Specification for Cutback Asphalt (Medium-Curing
specificgravity,andAPIgravitybeingreducedto15°Cor60°F
Type)
by means of international standard tables. By means of these
D2028 Specification for Cutback Asphalt (Rapid-Curing
same tables, values determined in one of the three systems of
Type)
measurement are convertible to equivalent values in either
E1 Specification for ASTM Liquid-in-Glass Thermometers
system so that measurements may be made in the units of local
E100 Specification for ASTM Hydrometers
convenience.
E220 Test Method for Calibration of Thermocouples By
NOTE 1—This test method is applicable to cutback asphalts and in
Comparison Techniques
general follows, but provides more explicit routines than, the procedure
outlined in Test Method D1298.
3. Terminology
1.2 The values stated in inch-pound units are to be regarded
3.1 Definitions of Terms Specific to This Standard:
as standard. The values given in parentheses are mathematical
3.1.1 API gravity—a function of specific gravity 60/60°F,
conversions to SI units that are provided for information only
represented by the equation:
and are not considered standard.
°API5~141.5/SG 60/60°F! – 131.5
1.3 This standard does not purport to address all of the
No statement of reference temperature is required since 60°F is
safety concerns, if any, associated with its use. It is the
included in the definition.
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica- 3.1.2 density—The mass of material per unit volume. When
bility of regulatory limitations prior to use. Specific precau-
reporting results, explicitly state the density in units of mass
tionary statements are given in Section 7. (kilograms) and volume (litres), together with the standard
reference temperature.
2. Referenced Documents
3.1.3 observed values—values observed at temperatures
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2.1 ASTM Standards:
other than the standard reference temperature. Values observed
C670 Practice for Preparing Precision and Bias Statements
at other temperatures are only hydrometer readings, and not
for Test Methods for Construction Materials
density, relative density (specific gravity), or API gravity.
D140 Practice for Sampling Bituminous Materials
3.1.4 specific gravity—The ratio of mass of a given volume
of a material at a specified temperature to the mass of an equal
volume of pure water measured at the reference temperature.
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This test method is under the jurisdiction of ASTM Committee D04 on Road
When reporting results, the standard reference temperature
and Paving Materials and is the direct responsibility of Subcommittee D04.47 on
Miscellaneous Asphalt Tests. must be stated.
CurrenteditionapprovedJune1,2005.PublishedJuly2005.Originallyapproved
in 1972. Last previous edition approved in 1997 as D3142 – 97. DOI: 10.1520/
4. Summary of Test Method
D3142-05.
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4.1 The sample is brought to the testing temperature and
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
transferred to a hydrometer cylinder at approximately the same
Standards volume information, refer to the standard’s Document Summary page on
temperature. The cylinder and its contents are placed in a
the ASTM website.
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D3142 – 05
constant-temperature bath to avoid excessive temperature that the level of the liquid is approximately the same as that of
variation during the test. The appropriate hydrometer is low- the sample in the hydrometer cylinder.
ered into the sample and allowed to settle. After temperature 6.5 Ove
...
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