ASTM D1665-98(2003)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation: D1665 – 98 (Reapproved 2003)
Standard Test Method for
Engler Specific Viscosity of Tar Products
This standard is issued under the fixed designation D1665; 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 efflux time by the viscometer calibration factor as determined
by making the same efflux measurement for water.
1.1 This test method covers the determination of specific
viscosity of tars and their fluid products. It does not determine
5. Significance and Use
absolute viscosity, but is an empirical flow test. Only by
5.1 This test method is useful in characterizing the consis-
conforming strictly to requirements of the test method are
tency of tar and tar distillates by measuring their flow proper-
reproducible results obtained.
ties. It is applicable to materials that are readily liquid at
1.2 This standard does not purport to address all of the
temperatures up to 100°C.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
6. Apparatus
priate safety and health practices and determine the applica-
6.1 Engler Viscosimeter as shown in Fig. 1, consisting of
bility of regulatory limitations prior to use.
the following:
6.1.1 Cup—This is a gold-plated cylindrical brass vessel of
2. Referenced Documents
2 106.0 6 1.0 mm, A, inside diameter, closed at the top by a
2.1 ASTM Standards:
double walled lid. To the rounded bottom is attached a
D140 Practice for Sampling Bituminous Materials
metal-encased tapered platinum efflux tube 20.0 6 0.1 mm, H,
E1 Specification for ASTM Liquid-in-Glass Thermometers
long with an inside diameter of 2.90 6 0.02 mm, E, at the top
E11 SpecificationforWovenWireTestSieveClothandTest
and 2.80 6 0.02 mm, F, at the bottom. The efflux tube shall
Sieves
project through and extend 3.0 6 0.2 mm, G, below a jacket
3. Terminology that surrounds the cup and shall have a bottom outside
diameter, including its surrounding metal, of 4.5 6 0.2 mm, I.
3.1 Definition:
Three metal measuring points, spaced equidistantly around the
3.1.1 Engler specific viscosity—the ratio obtained by divid-
circumference of the cup, are fastened to the sides and extend
ing the time of flow, in s, of 50 mLof material using an Engler
inwardlyapproximately7mm,thenturnupatarightangleand
viscosimeter at a selected temperature by a factor representing
end in sharp points which are located 52.0 6 0.5 mm, D,
thetimeofflow,ins,foranequalvolumeofwaterat25°C.The
verticallyabovethelowerendoftheeffluxtubeand25.0 61.0
usualtemperaturesfordeterminationofspecificviscosityoftar
mm, C, above the lowest portion of the cylindrical sidewall of
materials are 25°C, 40°C, 50°C, and 100°C, and generally the
the cup. They serve both for indicating when the instrument is
temperatureissoselectedthatthespecificviscosityisnotmore
level and for measuring the charge of material, which is
than 45.
approximately 250 mL.
4. Summary of Test Method
6.1.2 Jacket—The cup is surrounded by a jacket which
holds water or other suitable liquid serving as a constant
4.1 The time, in s, is measured for a fixed volume of liquid
temperature bath. In the type illustrated, the jacket is provided
material to flow through an efflux tube under an accurately
with a thermometer clamp and stirring device. A tripod
reproducible head and at a closely controlled temperature. The
supports the apparatus and also carries a ring burner by means
Engler specific viscosity is then calculated by dividing the
of which the bath is heated.Adjustable legs on the tripod serve
to level the instrument. Other arrangements of outer baths,
This test method is under the jurisdiction of ASTM Committee D04 on Road
supports,andstirringdevicesareacceptable,especiallywhenit
and Paving Materials and is the direct responsibility of Subcommittee D04.43 on
is desired to use more than one standardized cup in a single
Specifications and Tests for Tar and Tar Products.
bath.
Current edition approved July 10, 2003. Published September 2003. Originally
approved in 1959. Previous edition approved in 1998 as D1665 – 98. DOI:
6.1.3 Stopper—The efflux tube in the cup is closed or
10.1520/D1665-98R03.
opened by the insertion or withdrawal of a tapered hardwood
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
stopper which, to leave the tube open, can be suspended by its
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 brass pin from the hook on the cover. The stopper shall be a
the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
D1665 – 98 (2003)
FIG. 1 Engler Viscosimeter
smooth, round, wooden rod 180 mm long and 8 mm in enlarged above the graduation mark and calibrated to contain
diameter, with a brass wire pin 20 mm and 1.83 mm in 200 6 0.1 mL at 20°C.
diameter long inserted diametrically through the rod at a point
6.3 Thermometers—ASTM Engler Viscosity Thermometers
50 mm from the lower end, and tapered uniformly below this
23C, 24C, and 25C as required, and conforming to the
pin to end in a circular plane 1.6 to 2.0 mm in diameter.Above
requirements for these thermometers as specified in Specifica-
the pin the rod shall be planed or grooved on four sides to a
tion E1.
depth of 1 mm to prevent any possible restriction of air flow.
6.4 Timer—Stop watch or other timing device graduated in
6.2 Receivers—Two types are required as follows:
divisions of 0.2 s or less, and accurate to within 0.1 % when
6.2.1 Testing Flask—50mLgraduatecalibratedat20°C(see
tested over a 60-min period.
Fig. 2).
6.5 Strainer—300 mm ASTM sieve conforming to Specifi-
6.2.2 Calibration Flask—For standardization purposes
there shall be available a Kohlrausch flask, Fig. 3, with top cation E11.
D1665 – 98 (2003)
9. Standardization and Calibration of Viscosimeter
9.1 The efflux time for 200 mL of distilled water at 20.0°C
with an acceptable Engler viscosimeter shall be between 50.0
and 52.0 s. Determine this time and the factor representing the
efflux time for 50.0 mL of water at 25.0°C, as described in
9.1.1-9.1.6:
9.1.1 Clean the inner vessel and efflux tube of the viscosim-
eter with appropriate solvents, and finish by washing several
times with pure methyl or 95 % ethyl alcohol and rinsing
several times with distilled water.
NOTE 1—In cleaning the viscosimeter take particular precautions to
avoid injury to the efflux tube and measuring points. Use only a soft cloth
in the cup, and soft tissue in the efflux tube. Avoid wires or similar
substances and corrosive liquids. To prevent an air seal, keep the lid and
lip of the cup clean at all times. After a viscosimeter has been used with
bituminous materials, pay particular attention to c
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