ASTM D7496-09
(Test Method)Standard Test Method for Viscosity of Emulsified Asphalt by Saybolt Furol Viscometer
Standard Test Method for Viscosity of Emulsified Asphalt by Saybolt Furol Viscometer
SIGNIFICANCE AND USE
Viscosity has significance in the use of emulsified asphalt because it is a property which affects their utility. When used in application types of construction, the material must be thin enough to be uniformly applied through the spray bar of distributor, yet thick enough so that it will not flow from the crown or grade of the road. For mixing grade emulsions, the viscosity may affect mixibility and resulting thickness of film on the aggregate. The viscosity of many emulsions is affected by shear. Therefore, strict adherence to test procedure is necessary to achieve precision.
SCOPE
1.1 This test method utilizes the Saybolt Furol viscometer to measure the consistency of emulsified asphalt. It is applicable to all the emulsified asphalts specified in Specifications D 977 and D 2397.
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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Standards Content (Sample)
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Designation: D7496 – 09
Standard Test Method for
Viscosity of Emulsified Asphalt by Saybolt Furol
Viscometer
This standard is issued under the fixed designation D7496; 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 by shear. Therefore, strict adherence to test procedure is
necessary to achieve precision.
1.1 ThistestmethodutilizestheSayboltFurolviscometerto
measure the consistency of emulsified asphalt. It is applicable
4. Sample Conditioning for Testing
to all the emulsified asphalts specified in Specifications D977
4.1 All emulsified asphalts shall be properly stirred to
and D2397.
achieve homogeneity before testing.
1.2 The values stated in SI units are to be regarded as the
4.2 All emulsified asphalts with the viscosity testing re-
standard. The values given in parentheses are for information
quirements of 50°C shall be heated to 50 6 3°C in the original
only.
sample container in a water bath or oven.The container should
1.3 This standard does not purport to address all of the
be vented to relieve pressure. After the sample reaches 50 6
safety concerns, if any, associated with its use. It is the
3°C, stir the sample to achieve homogeneity.
responsibility of the user of this standard to establish appro-
4.3 Emulsified asphalts with a viscosity testing require-
priate safety and health practices and determine the applica-
ments to 25°C should be mixed or stirred at 25 6 3°C in the
bility of regulatory limitations prior to use.
original sample container to achieve homogeneity.
2. Referenced Documents
NOTE 1—Emulsified asphalts with viscosity testing requirements of
2.1 ASTM Standards: 25°C may be heated and stirred as specified in 4.2, if necessary. In the
event the 4.2 method is used, the sample should be cooled to 25 6 3°C
D88 Test Method for Saybolt Viscosity
before testing.
D244 Test Methods and Practices for Emulsified Asphalts
D977 Specification for Emulsified Asphalt
5. Apparatus
D2397 Specification for Cationic Emulsified Asphalt
5.1 Viscometer—ASaybolt Furol viscometer conforming to
E1 Specification for ASTM Liquid-in-Glass Thermometers
the requirements specified in Test Method D88.
E11 SpecificationforWovenWireTestSieveClothandTest
5.2 Sieve—A850-µm sieve or a 20-mesh strainer of wire
Sieves
cloth, framed or unframed. Refer to Specification E11.
3. Significance and Use 5.3 Thermometers—ASTM No. 17C or 17F for tests at
25°C (77°F) and ASTM No. 19C or 19F for tests at 50°C
3.1 Viscosity has significance in the use of emulsified
(122°F), conforming to the requirements of Specification E1,
asphaltbecauseitisapropertywhichaffectstheirutility.When
or any other thermometric device of equal accuracy.
used in application types of construction, the material must be
5.4 WaterBathorOven,capableofmaintainingtherequired
thin enough to be uniformly applied through the spray bar of
testing temperature within the limits specified in Table 2 of
distributor, yet thick enough so that it will not flow from the
Test Method D88.
crown or grade of the road. For mixing grade emulsions, the
5.5 Receiving Flask, as shown in Test Method D88.
viscosity may affect mixibility and resulting thickness of film
on the aggregate. The viscosity of many emulsions is affected
6. Hazards
6.1 Warning—Mercury has been designated by EPA and
This test method is under the jurisdiction of ASTM Committee D04 on Road
many state agencies as a hazardous material that can cause
and Paving Materials and is the direct responsibility of Subcommittee D04.42 on
central nervous system, kidney and liver damage. Mercury, or
Emulsified Asphalt Test.
its vapor, may be hazardous to health and corrosive to
Current edition approved June 1, 2009. Published June 2009. DOI: 10.1520/
D7496-09.
materials.Cautionshouldbetakenwhenhandlingmercuryand
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
mercury containing products. See the applicable product Ma-
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
terial Safety Data Sheet (MSDS) for details and EPA’s website
Standards volume information, refer to the standard’s Document Summary page on
(www.epa.gov/mercury/faq.htm) for additional information.
the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
D7496 – 09
Users should be aware that selling mercury or mercury 60 revolutions per minute with the thermometric device to
containing products (or both) into your state may be prohibited obtain uniform temperature distribution. Avoid incorporation
by state law. ofbubbles.Heattheemulsifiedasphaltinthewaterbathto51.4
6 0.3°C (124.5 6 0.5°F). Immediately pour the emulsified
asphalt through the 850-µm sieve or 20-mesh strainer into the
7. Procedure
viscometer until it is above the overflow rim. Stir the emulsi-
7.1 Testsat25°C(77°F)—Cleananddrytheviscometerand
fied asphalt in the viscometer at 60 revolutions per minute with
insert the stopper or cork. Follow either Procedure A or B
the thermometric device, avoiding bubble formation. Adjust
below:
the bath temperature until the emulsified asphalt temperature
7.1.1 Procedure A—Pour approximately 100 mL of the
remains constant for 1 minute at 50 6 0.1°C (122 6 0.2°F).
emulsified asphalt into a 400 mLglass beaker. Immerse bottom
Withdraw the thermometric device. Quickly remove the excess
of the beaker containing the emulsified asphalt approximately
emulsified asphalt from the gallery with
...
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