Standard Practice for Recovery of Asphalt from Solution Using the Rotary Evaporator

SIGNIFICANCE AND USE
In order to determine the characteristics of the asphalt in an asphalt paving mixture, it is necessary to extract the asphalt from the aggregate by means of a suitable solvent and then to recover the asphalt from the solvent without significantly changing the asphalt’properties. The asphalt recovered from the solvent by this practice can be tested using the same methods as for the original asphalt cement, and comparisons between the properties of the original and recovered asphalt can be made.
SCOPE
1.1 This practice is intended to recover asphalt from a solvent using the rotary evaporator to ensure that changes in the asphalt properties during the recovery process are minimized.
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are provided 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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Historical
Publication Date
09-Feb-2003
Current Stage
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ASTM D5404-03 - Standard Practice for Recovery of Asphalt from Solution Using the Rotary Evaporator
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:D5404–03
Standard Practice for
Recovery of Asphalt from Solution Using the Rotary
1
Evaporator
This standard is issued under the fixed designation D5404; 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 solution is subjected to a partial vacuum and a flow of nitrogen
gas or carbon dioxide gas. The recovered asphalt can then be
1.1 This practice is intended to recover asphalt from a
subjected to testing as required.
solvent using the rotary evaporator to ensure that changes in
the asphalt properties during the recovery process are mini-
4. Significance and Use
mized.
4.1 In order to determine the characteristics of the asphalt in
1.2 The values stated in SI units are to be regarded as the
an asphalt paving mixture, it is necessary to extract the asphalt
standard. The values given in parentheses are provided for
from the aggregate by means of a suitable solvent and then to
information only.
recover the asphalt from the solvent without significantly
1.3 This standard does not purport to address all of the
changing the asphalt’s properties. The asphalt recovered from
safety concerns, if any, associated with its use. It is the
the solvent by this practice can be tested using the same
responsibility of the user of this standard to establish appro-
methods as for the original asphalt cement, and comparisons
priate safety and health practices and determine the applica-
between the properties of the original and recovered asphalt
bility of regulatory limitations prior to use.
can be made.
2. Referenced Documents
5. Apparatus
2
2.1 ASTM Standards:
5.1 Rotary Evaporator (see Fig. 1), equipped with a distil-
D92 Test Method for Flash and Fire Points by Cleveland
lation flask, a variable speed motor capable of rotating the
Open Cup Tester
distillation flask at a rate of at least 50 rpm, condenser, solvent
D1856 Test Method for Recovery ofAsphalt From Solution
recovery flask, and heated oil bath.The angle of the distillation
by Abson Method
flaskfromthehorizontaltothebathissetatapproximately15°.
D2939 Test Methods for Emulsified Bitumens Used as
The distillation flask (Note 1), when fully immersed, should be
Protective Coatings
4
at a depth of approximately 40 mm (1.5 in.).
D6368 Specification for Vapor-Degreasing Solvents Based
on normal-Propyl Bromide and Technical Grade normal-
NOTE 1—A flask having a 2000 mL capacity is recommended.
Propyl Bromide
5.2 Manometer or Vacuum Gage, suitable for measuring the
2.2 Federal Specification:
specified vacuum.
3
O-T-634 (latest) Trichloroethylene, Technical
5.3 Gas Flowmeter,capableofindicatingagasflowofupto
1000 mL/min.
3. Summary of Practice
5.4 Sample Container, having adequate volume to hold the
3.1 The solution of solvent and asphalt from a prior extrac-
sample and added solvent.
tion is distilled by partially immersing the rotating distillation
5.5 Vacuum System, capable of maintaining a vacuum to
flask of the rotary evaporator in a heated oil bath while the
within 60.7 kPa (65 mm Hg) of the desired level up to and
including 80 kPa (600 mm Hg).
1
This practice is under the jurisdiction of ASTM Committee D04 on Road and
6. Reagents and Materials
Paving Materials and is the direct responsibility of Subcommittee D04.25 on
Analysis of Bituminous Mixtures.
6.1 Nitrogen Gas or Carbon Dioxide Gas—A pressurized
Current edition approved Feb. 10, 2003. Published May 2003. Originally
tank with pressure-reducing valve, or other convenient source.
approved in 1997. Last previous edition approved in 2002 as D5404 – 02. DOI:
10.1520/D5404-03.
NOTE 2—Different flow rates may be required depending on whether
2
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
Standards volume information, refer to the standard’s Document Summary page on
4
the ASTM website. The Buchi Rotavapor RE-111A, or its equivalent, has been found satisfactory
3
AvailablefromStandardizationDocumentsOrderDesk,Bldg.4SectionD,700 for this purpose. The Buchi Rotavapor is available from Fischer Scientific,
Robbins Ave., Philadelphia, PA 19111-5094, Attn: NPODS. Pittsburgh, PA.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

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D5404–03
8. Sample Preparation
8.1 The sample shall be obtained and handled in accordance
with Test Method D1856. This includes the procedure for
centrifuging the solution from a previous extraction.
9. Procedure
9.1 Heat the oil bath to a temperature of 140 6 3°C (285 6
...

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