ASTM D7497-09
(Practice)Standard Practice for Recovering Residue from Emulsified Asphalt Using Low Temperature Evaporative Technique
Standard Practice for Recovering Residue from Emulsified Asphalt Using Low Temperature Evaporative Technique
SIGNIFICANCE AND USE
The procedure described in this practice is used to obtain a residue from an emulsified asphalt that may be used for further testing in devices such as a dynamic shear rheometer. The lower evaporative temperatures of this procedure provide conditions that are very close to that of application techniques for these materials. This practice could be used in place of recovery techniques such as those of D 6934 and D 6997, when the temperatures used in those standards would negatively affect the residue.
SCOPE
1.1 This practice covers a method for recovering the residue from emulsified asphalts such as those specified in D 977 and D 2397 using a low temperature evaporative technique that is similar to pavement conditions. The recovered residue can be used for further testing as required.
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
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.
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Designation:D7497 −09
StandardPractice for
Recovering Residue from Emulsified Asphalt Using Low
Temperature Evaporative Technique
This standard is issued under the fixed designation D7497; 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 provide conditions that are very close to that of application
techniques for these materials. This practice could be used in
1.1 This practice covers a method for recovering the residue
place of recovery techniques such as those of D6934 and
from emulsified asphalts such as those specified in D977 and
D6997, when the temperatures used in those standards would
D2397 using a low temperature evaporative technique that is
negatively affect the residue.
similar to pavement conditions. The recovered residue can be
used for further testing as required.
4. Reagents and Materials
1.2 The values stated in SI units are to be regarded as the
4.1 Silicone Mat—The mat used can be similar to that
standard. The values given in parentheses are for information
specified in NF EN 13074 or any mat that will allow an
only.
emulsified asphalt spread rate of 1.5–2.0 kg/m . The mat may
1.3 This standard does not purport to address all of the
have a lip to contain the emulsified asphalt to the appropriate
safety concerns, if any, associated with its use. It is the
area.
responsibility of the user of this standard to establish appro-
NOTE 1—A silicone mat can be purchased at various restaurant supply
priate safety and health practices and determine the applica-
stores and a good size for this application is a half-sheet pan size to fit in
bility of regulatory limitations prior to use.
most laboratory ovens.
2. Referenced Documents 4.2 Spatula—Palette knife or other suitable material for
spreading the emulsified asphalt.
2.1 ASTM Standards:
D977 Specification for Emulsified Asphalt
4.3 Forced Draft Oven—Capable of maintaining a tempera-
D2397 Specification for Cationic Emulsified Asphalt
ture of 25ºC 6 2ºC and 60ºC 6 2ºC. The racks should be able
D6934 Test Method for Residue by Evaporation of Emulsi-
to be spaced a minimum of 10 cm from the top and bottom of
fied Asphalt
the oven and with a spacing of a minimum of 4 cm between
D6997 Test Method for Distillation of Emulsified Asphalt
racks with samples. The oven racks must be checked for level,
2.2 Other Standard: with a bubble level of 250 mm minimum length, from side to
NF EN 13074 Recovery of Binder from Bitumen Emulsions side and front to back of the oven.
by Evaporation
5. Procedure
3. Significance and Use
5.1 Pour the required amount of emulsified asphalt onto the
3.1 The procedure described in this practice is used to
silicone mat and spread evenly with a spatula to give a spread
2 2
obtain a residue from an emulsified asphalt that may be used
rate of 1.5 kg/m to 2.0 kg/m of emulsified asphalt. The
for further testing in devices such as a dynamic shear rheom-
silicone mat should be supported by an oven tray or other flat
eter. The lower evaporative temperatures of this procedure
trayorpanthatwillalloweasytransfertoanoven.Table1may
be used as a guide for the quantities of emulsified asphalt
necessary to give the appropriate spread rate for a given area.
This practice is under the jurisdiction of ASTM Committee D04 on Road and
Paving Materials and is the direct responsibility of Subcommittee D04.42 on
5.2 Place the silicone mat with the emulsified asphalt into a
Emulsified Asphal
...
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