ASTM D7226-13
(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
5.1 The viscosity of emulsified asphalts characterizes their flow properties and affects their utility at 50°C or at other temperatures. The sprayability and workability of an emulsified asphalt are directly related to its viscosity for many applications. 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, 25°C, 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 utilizes the rotational paddle viscometer to measure the viscosity of emulsified asphalt. It is applicable to all the emulsified asphalts described in Specifications D977 and D2397.
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
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 −13
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 25°C, or other agreed-upon temperatures. A microprocessor
circuitry system functioning in tandem with a temperature
1.1 This test method utilizes the rotational paddle viscom-
probe and equipped with internal electronic sensors detects and
eter to measure the viscosity of emulsified asphalt. It is
analyzes the preset temperature. A paddle is immersed in the
applicable to all the emulsified asphalts described in Specifi-
emulsified asphalt sample and is rotated at 100 RPM. The
cations D977 and D2397.
apparent viscosity of the sample is obtained and read from the
1.2 The values stated in SI units are to be regarded as
electronic display or an optional printer.
standard. No other units of measurement are included in this
standard.
5. Significance and Use
1.3 This standard does not purport to address all of the
5.1 The viscosity of emulsified asphalts characterizes their
safety concerns, if any, associated with its use. It is the
flow properties and affects their utility at 50°C or at other
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica- temperatures. The sprayability and workability of an emulsi-
bility of regulatory limitations prior to use. fied asphalt are directly related to its viscosity for many
applications. The material must be thin enough to be sprayed
2. Referenced Documents
yet thick enough such that it will not flow from the crown or
2
2.1 ASTM Standards:
grade of the road. For mixing grade emulsified asphalts the
D140 Practice for Sampling Bituminous Materials
viscosity will affect its workability and resulting film thickness
D977 Specification for Emulsified Asphalt
on the aggregate. This test method is useful to measure the
D2397 Specification for Cationic Emulsified Asphalt
apparent viscosity of emulsified asphalt at a temperature of
E11 Specification for Woven Wire Test Sieve Cloth and Test
50°C, 25°C, or another agreed-upon temperature. The preset
Sieves
temperature and rotational speed at 100 RPM allow for an
automated and consistent determination of an emulsified as-
3. Terminology
phalt viscosity within a short time.
3.1 Definitions:
3.1.1 viscosity, n—ratio of shear stress to shear rate.
6. Apparatus
3.1.1.1 Discussion—The SI unit of viscosity is the Pascal
3
6.1 The rotational paddle viscometer test system consists of
second (Pa·s).
a paddle, temperature probe, sample cup, the sample cup cover,
4. Summary of Test Method
a means of controlling the sample temperature to within
4.1 The rotational paddle viscometer method is used to 60.1°C and a readout system to display viscosity. The dimen-
measure the apparent viscosity of emulsified asphalt at 50°C, sions of the sample cup and paddle are shown in Figs. 1-3.
6.2 Thermometer—Any thermometric device can be used to
1
This test method is under the jurisdiction of ASTM Committee D04 on Road
monitor the temperature of the sample being conditioned for
and Paving Materials and is the direct responsibility of Subcommittee D04.42 on
testing.
Emulsified Asphalt Test.
Current edition approved Dec. 1, 2013. Published January 2014. Originally
6.3 Sieve—An 850-µm sieve or a 20-mesh strainer of wire
approved in 2006. Last previous edition approved in 2011 as D7226 – 11. DOI:
10.1520/D7226-13.
cloth, framed or unframed, conforming to Specification E11 is
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
used.
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
6.4 Oven/Water Bath—An oven/water bath capable of main-
the ASTM website.
2 taining the required testing temperature within the limit of
3
The centimetre gram second (cgs) unit of viscosity is the poise (dynes/cm ) and
is equivalent to 0.1 Pa·s. One centipoise (cP) is one millipascal second (mPa·s). 63°C.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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D7226−13
FIG. 1Paddle Dimensions
FIG. 2Sample Cup Dimensions
2
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D7226−13
FIG. 3Paddle and Sample Cup
7. Hazards 9. Procedure
7.1 Warning—Mercury has been designated by EPA and 9.1 Obtain a representative sample of the material for
many s
...
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 − 11 D7226 − 13
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 utilizes the rotational paddle viscometer to measure the apparent viscosity of
emulsified asphalt with viscosities between 30 and 1500 mPa·s (centipoises) at 50°C (122°F). asphalt. It is applicable to all the
emulsified asphaltasphalts described in Specifications D977 and D2397.
1.2 The values givenstated in SI units are to be considered the standard. The values given in parentheses are for information
only.regarded as standard. No other units of measurement are included in this standard.
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 Definitions:
3.1.1 viscosity, n—ratio of shear stress to shear rate.
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.
Current edition approved Dec. 1, 2011Dec. 1, 2013. Published January 2012January 2014. Originally published 2006 approved in 2006. Last previous edition approved
in 2011 as D7226D7226 – 11.–06. DOI: 10.1520/D7226-11.10.1520/D7226-13.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or 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 the ASTM website.
3.1.1.1 Discussion—
3 2
The SI unit of viscosity is the Pascal second (Pa·s).The centimetre gram second (cgs) unit of viscosity is 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 paddle viscometer method is used to measure the apparent viscosity of
emulsified asphalt at 50°C (122°F) between 30 and 1500 mPa·s (cP). 50°C, 25°C, or other agreed-upon temperatures. A
3
Emulsions are sensitive to RPM, therefore, the manufacturer has preset the instrument to run at 100 RPM.
3
No accurate predictable conversion from mPa seconds to Saybolt Furol Seconds (SFS) is available at thisThe centimetre gram second (cgs) unit of viscosity is the poise
2
(dynes/cm time. However, an empirical correlation between SFS and mPa seconds can be obtained by performing the respective viscosity measurements on the appropriate
equipment.) and is equivalent to 0.1 Pa·s. One centipoise (cP) is one millipascal second (mPa·s).
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
D7226 − 13
microprocessor 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 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 an 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 The sprayability and workability is of an emulsified asphalt are directly related to theirits
viscosity for many applications types. applications. The material must be thin enough to be sprayed yet
...
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