ASTM D6805-02e1

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Designation:D6805–02
Standard Practice for
Infrared (IR) Procedure for Determination of Aromatic/
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Aliphatic Ratio of Bituminous Emulsions
This standard is issued under the fixed designation D 6805; 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 (e) indicates an editorial change since the last revision or reapproval.
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e NOTE—The titles for Fig. X2.1 and Fig. X2.2 were editorially corrected in December 2005.
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1. Scope Hawley’s Condensed Chemical Dictionary
3.1.3 infrared absorbance—the range of wavelengths in the
1.1 This practice uses infrared analytical techniques to
infrared that are absorbed by a specimen and identify its
qualitatively determine in the laboratory a ratio of aromatic
molecular components and compound structures. The infrared
absorbance to aliphatic absorbance. This practice may be used
region of the electromagnetic spectrum includes wavelengths
to determine if the bitumen in the emulsion is predominantly
from 0.70 µm to approximately 300 µm, that is, longer than
aromatic or aliphatic in nature.
visible light and shorter than microwave.
1.2 This standard does not purport to address all of the
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Hawley’s Condensed Chemical Dictionary
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
4. Summary of Practice
priate safety and health practices and determine the applica-
4.1 Asample of bituminous emulsion from which the water
bility of regulatory limitations prior to use.
has been removed using Na SO is dissolved in carbon
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2. Referenced Documents disulfide (CS ), and the infrared (IR) absorbance from 2.5 to
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4.2 µm is determined. The absorbance at 3.27 µm (aromatic) is
2.1 ASTM Standards:
divided by the absorbance at 3.40 µm (aliphatic) to obtain the
D 2939 Test Methods for Emulsified Bitumens Used as
IR ratio.
Protective Coatings
5. Significance and Use
3. Terminology
5.1 The results of this practice may be used to distinguish
3.1 Definitions:
tar-based emulsion from an asphalt-based emulsion for speci-
3.1.1 aliphatic—a group of organic compounds character-
fication compliance purposes.
ized by straight- or branched-chain arrangements of the con-
stituent carbon atoms. Examples of aliphatic compounds in-
6. Apparatus
clude paraffins (alkanes), olefins (alkenes), and acetylenes
6.1 Infrared Spectrophotometer.
(alkynes). These compounds are primarily found in petroleum
3 6.2 Sealed Sodium Chloride (NaCl) IR Cell, with 0.1 to 1
sources. Hawley’s Condensed Chemical Dictionary
mm path length.
3.1.2 aromatic—a group of organic compounds made up of
6.3 IR Cell Cleaner.
unsaturated cyclic hydrocarbons containing one or more rings,
6.4 Vacuum Pump and Dry-Ice Trap, to protect pump.
an example of which is benzene. Large numbers of these
6.5 Syringe, glass, 10 mL.
compounds are derived from petroleum and coal tar, and are
6.6 Mechanical Shaker.
classified as “aromatics” because of their strong and not
6.7 Sieves, No. 40 (425 µm opening) and No. 100 (150 µm).
unpleasant odor characteristics.
6.8 Balance, capable of weighing to 0.001 g.
6.9 Pipet, 10 mL and rubber bulb.
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ThispracticeisunderthejurisdictionofASTMCommitteeD08onRoofingand
Waterproofing and is the direct responsibility of Subcommittee D08.09 on Bitumi-
7. Reagents and Materials
nous Emulsions.
7.1 Disposable “Medicine” Dropper.
Current edition approved June 10, 2002. Published July 2002.
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or 7.2 Vial, 20 mL, with cork-backed metal foil liner.
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
7.3 Filter Paper, rapid flow rate, 12.5 cm.
Standards volume information, refer to the standard’s Document Summary page on
7.4 Glass Funnel, for above filter paper.
the ASTM website.
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7.5 Carbon Disulfide (CS ), spectroscopy grade.
Lewis, Richard J., Sr., Hawley’s Condensed Chemical Dictionary, Thirteenth
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Edition, New York, Van Nostrand Reinhold, 1997.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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D6805–02
7.6 Sodium Sulfate (Na SO ), anhydrous. instrument can only be operated in the Transmittance mode,
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use logarithmically ruled chart paper (if log paper is not
8. Hazards
available, follow Transmittance mode for linear paper calcula-
8.1 Carbon disulfide (CS ) is a hazardous material and must
tion procedure).
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behandledproperly.BeforeusingCS ,readandunderstandthe 13.1.5 Record the following information on the chart paper:
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CS MaterialSafetyDataSheetandthelabelontheCS bottle.
13.1.5.1 Sample number,
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Use appro
...