ASTM D7226-11
(Test Method)Standard Test Method for Determining the Viscosity of Emulsified Asphalts Using a Rotational Paddle Viscometer
Standard Test Method for Determining the Viscosity of Emulsified Asphalts Using a Rotational Paddle Viscometer
SIGNIFICANCE AND USE
The viscosity of emulsified asphalts characterizes their flow properties and affects their utility at 50°C (122°F) or at other temperatures. An emulsified asphalt sprayability and workability is directly related to their viscosity for many applications types. The material must be thin enough to be sprayed yet thick enough such that it will not flow from the crown or grade of the road. For mixing grade emulsified asphalts the viscosity will affect its workability and resulting film thickness on the aggregate. This test method is useful to measure the apparent viscosity of emulsified asphalt at a temperature of 50°C (122°F) or another agreed-upon temperature. The preset temperature and rotational speed at 100 RPM allow for an automated and consistent determination of an emulsified asphalt viscosity within a short time.
SCOPE
1.1 This test method uses a paddle rotational viscometer to measure the apparent viscosity of emulsified asphalt with viscosities between 30 and 1500 mPa·s (centipoises) at 50°C (122°F). It is applicable to all emulsified asphalt described in Specifications D977 and D2397.
1.2 The values given in SI units are to be considered 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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Designation:D7226 −11
StandardTest Method for
Determining the Viscosity of Emulsified Asphalts Using a
1
Rotational Paddle Viscometer
This standard is issued under the fixed designation D7226; 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.
2
1. Scope viscosity is the poise (dynes/cm ) and is equivalent to 0.1 Pa·s.
One centipoise (cP) is one millipascal second (mPa·s).
1.1 This test method uses a paddle rotational viscometer to
measure the apparent viscosity of emulsified asphalt with
4. Summary of Test Method
viscosities between 30 and 1500 mPa·s (centipoises) at 50°C
4.1 The paddle rotational viscometer for this test method is
(122°F). It is applicable to all emulsified asphalt described in
used to measure the apparent viscosity of emulsified asphalt at
Specifications D977 and D2397.
50°C (122°F) between 30 and 1500 mPa·s (cP). A micropro-
1.2 The values given in SI units are to be considered the
cessor circuitry system functioning in tandem with a tempera-
standard. The values given in parentheses are for information
tureprobeandequippedwithinternalelectronicsensorsdetects
only.
and analyzes the preset temperature. A paddle is immersed in
3
1.3 This standard does not purport to address all of the
the emulsified asphalt sample and is rotated at 100 RPM. The
safety concerns, if any, associated with its use. It is the
apparent viscosity of the sample is obtained within 5 min and
responsibility of the user of this standard to establish appro-
read from the electronic display or optional printer.
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use. 5. Significance and Use
5.1 The viscosity of emulsified asphalts characterizes their
2. Referenced Documents
flow properties and affects their utility at 50°C (122°F) or at
2
2.1 ASTM Standards:
other temperatures. An emulsified asphalt sprayability and
C670 Practice for Preparing Precision and Bias Statements
workability is directly related to their viscosity for many
for Test Methods for Construction Materials
applications types. The material must be thin enough to be
D140 Practice for Sampling Bituminous Materials
sprayed yet thick enough such that it will not flow from the
D977 Specification for Emulsified Asphalt
crown or grade of the road. For mixing grade emulsified
D2397 Specification for Cationic Emulsified Asphalt
asphalts the viscosity will affect its workability and resulting
D7496 Test Method for Viscosity of Emulsified Asphalt by
film thickness on the aggregate. This test method is useful to
Saybolt Furol Viscometer
measure the apparent viscosity of emulsified asphalt at a
E1 Specification for ASTM Liquid-in-Glass Thermometers
temperature of 50°C (122°F) or another agreed-upon tempera-
4
E11 Specification for Woven Wire Test Sieve Cloth and Test
ture. The preset temperature and rotational speed at 100 RPM
Sieves
allow for an automated and consistent determination of an
emulsified asphalt viscosity within a short time.
3. Terminology
6. Apparatus
3.1 Definitions:
3.1.1 viscosity, n—ratio of shear stress to shear rate.
6.1 The paddle viscometer test system consists of a paddle,
3.1.1.1 Discussion—The SI unit of viscosity is the Pascal
temperature probe, sample cup, the sample cup cover, a means
second (Pa·s). The centimetre gram second (cgs) unit of
for controlling the sample temperature to 50 6 0.1°C (122 6
0.18°F), and readout system to display viscosity. The dimen-
sions of the sample cup and paddle are shown in Figs. 1-3.
1
This test method is under the jurisdiction of ASTM Committee D04 on Road
and Paving Materials and is the direct responsibility of Subcommittee D04.42 on
Emulsified Asphalt Test.
3
Current edition approved Dec. 1, 2011. Published January 2012. Originally Emulsions are sensitive to RPM, therefore, the manufacturer has preset the
published 2006 as D7226–06. DOI: 10.1520/D7226-11. instrument to run at 100 RPM.
2 4
For referenced ASTM standards, visit the ASTM website, www.astm.org, or No accurate predictable conversion from mPa seconds to Saybolt Furol
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Seconds (SFS) is available at this time. However, an empirical correlation between
Standards volume information, refer to the standard’s Document Summary page on SFS and mPa seconds can be obtained by performing the respective viscosity
the ASTM website. measurements on the appropriate equipment.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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D
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This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation:D7226–10 Designation: D7226 – 11
Standard Test Method for
Determining the Viscosity of Emulsified Asphalts Using a
1
Rotational Paddle Viscometer
This standard is issued under the fixed designation D7226; 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
1.1 This test method uses a paddle rotational viscometer to measure the apparent viscosity of emulsified asphalt with viscosities
between 30 and 1500 mPa·s (centipoises) at 50°C (122°F). It is applicable to all emulsified asphalt described in Specifications
D977 and D2397.
1.2 The values given in SI units are to be considered 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.
2. Referenced Documents
2
2.1 ASTM Standards:
C670 Practice for Preparing Precision and Bias Statements for Test Methods for Construction Materials
D140 Practice for Sampling Bituminous Materials
D977 Specification for Emulsified Asphalt
D2397 Specification for Cationic Emulsified Asphalt
D7496 Test Method for Viscosity of Emulsified Asphalt by Saybolt Furol Viscometer
E1 Specification for ASTM Liquid-in-Glass Thermometers
E11 Specification for Woven Wire Test Sieve Cloth and Test Sieves
3. Terminology
3.1 Definition:
3.1.1 viscosity, n—ratio of shear stress to shear rate.
3.1.1.1 Discussion—The SI unit of viscosity is the Pascal second (Pa·s). The centimetre gram second (cgs) unit of viscosity is
2
the poise (dynes/cm ) and is equivalent to 0.1 Pa·s. One centipoise (cP) is one millipascal second (mPa·s).
4. Summary of Test Method
4.1 The paddle rotational viscometer for this test method is used to measure the apparent viscosity of emulsified asphalt at 50°C
(122°F) between 30 and 1500 mPa·s (cP).Amicroprocessor circuitry system functioning in tandem with a temperature probe and
equipped with internal electronic sensors detects and analyzes the preset temperature. A paddle is immersed in the emulsified
3
asphalt sample and is rotated at 100 RPM. The apparent viscosity of the sample is obtained within 5 min and read from the
electronic display or optional printer.
5. Significance and Use
5.1 The viscosity of emulsified asphalts characterizes their flow properties and affects their utility at 50°C (122°F) or at other
temperatures.An emulsified asphalt sprayability and workability is directly related to their viscosity for many applications types.
The material must be thin enough to be sprayed yet thick enough such that it will not flow from the crown or grade of the road.
For mixing grade emulsified asphalts the viscosity will affect its workability and resulting film thickness on the aggregate. This
test method is useful to measure the apparent viscosity of emulsified asphalt at a temperature of 50°C (122°F) or another
1
This test method is under the jurisdiction ofASTM Committee D04 on Road and Paving Materials and is the direct responsibility of Subcommittee D04.42 on Emulsified
Asphalt Test.
Current edition approved Dec. 1, 2010.2011. Published March 2011.January 2012. Originally published 2006 as D7226–06. DOI: 10.1520/D7226-101.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Emulsions are sensitive to RPM, therefore, the manufacturer has preset the instrument to run at 100 RPM.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1
---------------------- Page: 1 ----------------------
D7226 – 11
4
agreed-upon temperature. The preset temperature and rotational speed at 100 RPM allow for an automated and consistent
determination of an emulsified asphalt viscosity within a short time.
6. Apparatus
6.1 The paddle viscometer test system consists of a paddle, temperature probe, sample cup, the sample cup cover, a means for
controlling the sample temperature to 50 6 0.1°C (122 6 0.18°F), and readout system to display viscosity. The dimensions of the
...
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