ASTM D6805-02(2008)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation: D6805 − 02(Reapproved 2008)
Standard Practice for
Infrared (IR) Procedure for Determination of Aromatic/
Aliphatic Ratio of Bituminous Emulsions
This standard is issued under the fixed designation D6805; 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 3.1.2 aromatic—a group of organic compounds made up of
unsaturated cyclic hydrocarbons containing one or more rings,
1.1 This practice uses infrared analytical techniques to
an example of which is benzene. Large numbers of these
qualitatively determine in the laboratory a ratio of aromatic
compounds are derived from petroleum and coal tar, and are
absorbance to aliphatic absorbance. This practice may be used
classified as “aromatics” because of their strong and not
to determine if the bitumen in the emulsion is predominantly
unpleasant odor characteristics.
aromatic or aliphatic in nature.
Hawley’s Condensed Chemical Dictionary
1.2 The values stated in SI units are to be regarded as
3.1.3 infrared absorbance—the range of wavelengths in the
standard. No other units of measurement are included in this
infrared that are absorbed by a specimen and identify its
standard.
molecular components and compound structures. The infrared
1.3 This standard does not purport to address all of the
region of the electromagnetic spectrum includes wavelengths
safety concerns, if any, associated with its use. It is the
from 0.70 µm to approximately 300 µm, that is, longer than
responsibility of the user of this standard to establish appro-
visible light and shorter than microwave.
priate safety and health practices and determine the applica-
Hawley’s Condensed Chemical Dictionary
bility of regulatory limitations prior to use.
4. Summary of Practice
2. Referenced Documents
4.1 Asample of bituminous emulsion from which the water
2.1 ASTM Standards:
has been removed using Na SO is dissolved in carbon
2 4
D2939 Test Methods for Emulsified Bitumens Used as
disulfide (CS ), and the infrared (IR) absorbance from 2.5 to
Protective Coatings (Withdrawn 2012)
4.2 µm is determined. The absorbance at 3.27 µm (aromatic) is
divided by the absorbance at 3.40 µm (aliphatic) to obtain the
3. Terminology
IR ratio.
3.1 Definitions:
5. Significance and Use
3.1.1 aliphatic—a group of organic compounds character-
ized by straight- or branched-chain arrangements of the con-
5.1 The results of this practice may be used to distinguish
stituent carbon atoms. Examples of aliphatic compounds in-
tar-based emulsion from an asphalt-based emulsion for speci-
clude paraffins (alkanes), olefins (alkenes), and acetylenes
fication compliance purposes.
(alkynes). These compounds are primarily found in petroleum
sources. Hawley’s Condensed Chemical Dictionary
6. Apparatus
6.1 Infrared Spectrophotometer .
6.2 Sealed Sodium Chloride (NaCl) IR Cell, with 0.1 to 1
ThispracticeisunderthejurisdictionofASTMCommitteeD08onRoofingand
Waterproofing and is the direct responsibility of Subcommittee D08.09 on Bitumi- mm path length.
nous Emulsions.
6.3 IR Cell Cleaner.
Current edition approved Dec. 1, 2008. Published December 2008. Originally
ε1
approved in 2002. Last previous edition approved in 2002 as D6805 – 02 . DOI:
6.4 Vacuum Pump and Dry-Ice Trap , to protect pump.
10.1520/D6805-02R08.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
6.5 Syringe, glass, 10 mL.
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
6.6 Mechanical Shaker.
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
6.7 Sieves, No. 40 (425 µm opening) and No. 100 (150 µm).
The last approved version of this historical standard is referenced on
www.astm.org.
6.8 Balance, capable of weighing to 0.001 g.
Lewis, R. J., Sr., Hawley’s Condensed Chemical Dictionary, Thirteenth
Edition, New York, Van Nostrand Reinhold, 1997. 6.9 Pipet, 10 mL and rubber bulb.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D6805 − 02 (2008)
NOTE 2—Follow the filling directions supplied by the cell(s) manufac-
7. Reagents and Materials
turer.
7.1 Disposable “Medicine” Dropper.
13.1.4 Referring to the instructions supplied with the par-
7.2 Vial, 20 mL, with cork-backed metal foil liner.
ticular IR instrument being used, determine the IR spectrum
from 2.5 to 4.2 µm in the absorbance mode. Linearly ruled
7.3 Filter Paper, rapid flow rate, 12.5 cm.
chart paper is used in the absorbance mode; however, if the
7.4 Glass Funnel, for above filter paper.
instrument can only be operated in the Transmittance mode,
7.5 Carbon Disulfide (CS ), spectroscopy grade.
use logarithmically ruled chart paper (if log paper is not
available, follow Transmittance mode for linear paper calcula-
7.6 Sodium Sulfate (Na SO ), anhydrous.
2 4
tion procedure).
8. Hazards 13.1.5 Record the following information on the chart paper:
13.1.5.1 Sample number,
8.1 Carbon disulfide (CS ) is a hazardous material and must
13.1.5.2 Sample identification,
behandledproperly.BeforeusingCS ,readandunderstandthe
13.1.5.3 Date of analysis,
CS MaterialSafetyDataSheetandthelabelontheCS bottle.
2 2
13.1.5.4 Analyst’s name,
Use appropriate precautions, including safety equipm
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