ASTM D6997-04

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation: D6997 – 04
Standard Test Method for
Distillation of Emulsified Asphalt
This standard is issued under the fixed designation D6997; 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 search. This test method can also be used to obtain residue and
oil distillate for further testing.
1.1 This test method covers the quantitative determination
of residue and oil distillate in emulsified asphalts composed
5. Apparatus
principally of a semisolid or liquid asphaltic base, water, and
5.1 Aluminum-Alloy Still—approximately 240 mm in height
an emulsifying agent.
by 95 mm in inside diameter with cover and clamp as shown
1.2 This test method does not purport to address all of the
in Fig. 1.Avariety of gasket materials may be used to seal the
safety concerns, if any, associated with its use. It is the
still providing they withstand the maximum temperature
responsibility of the user of this standard to establish appro-
reached during distillation.
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use.
NOTE 1—Residue by distillation results obtained with iron stills are
acceptable.
2. Referenced Documents
5.2 Heat Sources—one ring burner, approximately 125 mm
2.1 ASTM Standards:
insidediameter,havingholesontheinnerperipheryandhaving
E1 Specification for ASTM Liquid-in-Glass Thermometers
threespacers,toensurecenteringofburneraroundthestill(see
E11 SpecificationforWovenWireTestSieveClothandTest
Fig. 2); one Bunsen burner equipped with optional wing tip as
Sieves
shown in Fig. 3
5.3 Connection Apparatus—consisting of a 12.5 6 0.5 mm
3. Summary of Method
glassormetalconnectingtube,tinshield(asdetailedinFig.3),
3.1 A sample of emulsified asphalt is heated in an
and a water-cooled glass condenser tube with a metal or
aluminum-alloystillto260 65°Candthevolumesofdistillate
borosilicate glass jacket. The metal connecting tube may be
and water obtained are measured. The residue from the
secured to the lid by a threaded compressing fitting. Glass
distillation, and also any oil portion of the distillate may be
connecting tube may be secured to the lid by means of a cork
tested as required.
or silicone stopper. Other condensers of 12.5 6 0.5 mm glass
or metal tubing may be used, providing that the wetted length
4. Significance and Use
is 400 to 550 mm.
4.1 This test method can be used for quantitative determi-
5.4 Graduated Cylinder—100-mL, with graduation inter-
nation of residue and oil distillates in emulsified asphalts for
vals of 1.0 mL.
specification acceptance, service evaluation, control, and re-
5.5 Thermometer—ASTM 7C thermometer, as prescribed
in Specification E1, or any other thermometric device of equal
accuracy.
This test method is under the jurisdiction of ASTM Committee D04 on Road
and Paving Materials and is the direct responsibility of Subcommittee D04.42 on
5.6 Balance—capable of weighing 3500 g to within 60.1 g.
Emulsified Asphalt Tests.
5.7 Stoppers—Cork (wrapped in foil) or silicone stoppers to
Current edition approved Aug. 1, 2004. Published August 2004. DOI: 10.1520/
sealholesinstillcover,maintaintemperaturemeasuringdevice
D6997-04.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or position, and secure connecting tube to still cover.
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
5.8 Rubber Tubing—heat resistant tubing of adequate size
Standards volume information, refer to the standard’s Document Summary page on
to secure glass to glass joint of connecting tube and condenser.
the ASTM website.
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D6997 – 04
still(includinglid,clamp,temperaturemeasuringdevice,small
stopper, and gasket, if gasket is used).
7.2 Useagasketofsuitablematerialbetweenthestillandits
cover, or grind the joint to a tight fit. Securely clamp the cover
on the still.
7.3 Insert a thermometer, or other thermometric device,
through a cork or silicone stopper, in one of the small holes
providedinthecover,sealtheotherholewithacorkorsilicone
stopper. Adjust the temperature measuring device so that the
end of the bulb is approximately 6 mm from the bottom of the
still.
NOTE 4—A second temperature measuring device may be used in the
second small hole, with the bulb placed approximately 165 mm from the
bottom of the still. A sudden change in temperature reading of upper
temperature measuring device indicates foam on bulb. Remove heat until
foaming ceases.
7.4 Place the ring burner around the still about 150 mm
from the bottom of the still.Apply heat by lighting this burner
and adjusting to low flame. Also apply just enough heat from
a bunsen burner to the connecting tube to prevent condensation
of water in this tube.
7.5 When the temperature can be read on the thermometer,
or at approximately 215°C, move the ring burner approxi-
mately level with the bottom of t
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