ASTM D6930-04
(Test Method)Standard Test Method for Settlement and Storage Stability of Emulsified Asphalts
Standard Test Method for Settlement and Storage Stability of Emulsified Asphalts
SIGNIFICANCE AND USE
This test method is useful for determining, in a comparatively short time, the storage stability or settlement of an emulsified asphalt. It is a measure of the permanence of the dispersion as related to time, but it is not to be construed to have significance as a measure of other stability aspects involved in use.
SCOPE
1.1 This test method covers the ability of an emulsified asphalt to remain as a uniform dispersion during storage. It is applicable to emulsified asphalts composed principally of a semisolid or liquid asphaltic base, water, and an emulsifying agent.
1.2 This test method 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.
General Information
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Standards Content (Sample)
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Designation: D6930 – 04
Standard Test Method for
Settlement and Storage Stability of Emulsified Asphalts
This standard is issued under the fixed designation D6930; 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.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope 5. Sample Conditioning for Testing
1.1 This test method covers the ability of an emulsified 5.1 All emulsified asphalts shall be properly stirred to
asphalt to remain as a uniform dispersion during storage. It is achieve homogeneity before testing.
applicable to emulsified asphalts composed principally of a 5.2 All emulsified asphalts with viscosity testing require-
semisolid or liquid asphaltic base, water, and an emulsifying ments of 50°C shall be heated to 50 6 3°C in the original
agent. sample container in a water bath or oven. The container should
1.2 This test method does not purport to address all of the be vented to relieve pressure. After the sample reaches 50 6
safety concerns, if any, associated with its use. It is the 3°C, stir the sample to achieve homogeneity.
responsibility of the user of this standard to establish appro- 5.3 Emulsified asphalts with viscosity testing requirements
priate safety and health practices and determine the applica- of 25°C should be mixed or stirred at 25 6 3°C in the original
bility of regulatory limitations prior to use. sample container to achieve homogeneity.
NOTE 1—Emulsified asphalts with viscosity testing requirements of
2. Referenced Documents
25°C may be heated and stirred as specified in 5.2, if necessary. In the
2.1 ASTM Standards:
event the 5.2 method is used, the sample should be cooled to 25 6 3°C
D6934 Test Method for Residue by Evaporation of Emul-
before testing.
sified Asphalt
6. Apparatus
3. Significance and Use
6.1 Cylinder—500-mL glass cylinder, with pressed or
3.1 This test method is useful for determining, in a com- molded glass base and cork, rubber, or glass stopper, having an
paratively short time, the storage stability or settlement of an outside diameter of 50 6 5 mm.
emulsified asphalt. It is a measure of the permanence of the
NOTE 2—The use of a cylinder containing side arm glass tubes to
dispersion as related to time, but it is not to be construed to
permit the siphoning of the material rather than pipetting is an acceptable
have significance as a measure of other stability aspects
alternative method.
involved in use.
6.2 Glass Pipet—A 50-mL siphon glass-tube pipet of op-
tional form.
4. Summary of Test Method
6.3 Balance, capable of weighing 1000 g to 0.1 g.
4.1 This test method determines the difference in percent
6.4 Beakers—Two 1000 mL glass or metal beakers.
residue of samples taken from the top and bottom of material
6.5 Stir Rods—Glass or Stainless Steel with rounded ends.
placed in undisturbed simulated storage for a specified time
6.6 Oven—Capable of maintaining a temperature of 163 6
period. The result is expressed by determining the difference
3°C.
between the percent residue of the top and bottom samples for
the storage cylinder.
7. Procedure
7.1 Bring the emulsified asphalt to room temperature, 22°C
This test method is under the jurisdiction of ASTM Committee D04 on Road to 28°C. Place a 500-mL representative sample in the glass
and Paving Materials and is the direct responsibility of Subcommittee D04.42 on
cylinder.Stopperthecylinderandallowittostandundisturbed,
Emulsified Asphalt Tests.
at laboratory air temperature 22°C to 28°C, for 24 h for storage
Current edition approved Aug. 1, 2004. Published August 2004. DOI: 10.1520/
stability or 5 days for settlement test. After standing for this
D6930-04.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
period, remove approximately 55 mL of emulsified asphalt
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
from the top of the cylinder by means of the pipet or siphon
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
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