ASTM D5018-23
(Test Method)Standard Test Method for Shear Viscosity of Coal-Tar and Petroleum Pitches
Standard Test Method for Shear Viscosity of Coal-Tar and Petroleum Pitches
SIGNIFICANCE AND USE
5.1 This test method is useful as one element in establishing the uniformity of shipments.
5.2 Viscosity is also valuable for rheological characterization of binder pitches. Binder pitch imparts consistency to carbonaceous mixes and affects their resistance to deformation. Binder pitch viscosity is important for assessing mix consistency and for evaluating the ease of mix extrusion or molding into artifacts.
SCOPE
1.1 This test method covers the determination of the apparent shear viscosity of coal-tar and petroleum-based pitches having a Mettler softening point (SP) range of approximately 95 °C to 120 °C (see Test Method D3104).
1.2 This test method is applicable only for rotational viscometers.
1.3 Since this test method is based on theoretical grounds, strict adherence to details of the procedure is necessary to comply with the theoretical requirements.
1.4 The values stated in SI units are to be regarded as standard.
1.4.1 Exception—The values stated in conventional units (centipoise) are to be regarded as the standard for viscosity measurement only. The SI unit is the pascal second (Pa·s) and one millipascal second (mPa·s) = one centipoise (cP); centipoise is in cgs units.
1.5 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. Specific hazard statements are given in Section 8.
1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
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This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: D5018 − 23
Standard Test Method for
1
Shear Viscosity of Coal-Tar and Petroleum Pitches
This standard is issued under the fixed designation D5018; 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* D3104 Test Method for Softening Point of Pitches (Mettler
Softening Point Method)
1.1 This test method covers the determination of the appar-
D4175 Terminology Relating to Petroleum Products, Liquid
ent shear viscosity of coal-tar and petroleum-based pitches
Fuels, and Lubricants
having a Mettler softening point (SP) range of approximately
D4296 Practice for Sampling Pitch
95 °C to 120 °C (see Test Method D3104).
E691 Practice for Conducting an Interlaboratory Study to
1.2 This test method is applicable only for rotational vis-
Determine the Precision of a Test Method
cometers.
E1953 Practice for Description of Thermal Analysis and
1.3 Since this test method is based on theoretical grounds, Rheology Apparatus
E2975 Test Method for Calibration or Calibration Verifica-
strict adherence to details of the procedure is necessary to
comply with the theoretical requirements. tion of Concentric Cylinder Rotational Viscometers
1.4 The values stated in SI units are to be regarded as
3. Terminology
standard.
1.4.1 Exception—The values stated in conventional units 3.1 Definitions:
(centipoise) are to be regarded as the standard for viscosity
3.1.1 For definitions of terms used in this test method, refer
measurement only. The SI unit is the pascal second (Pa·s) and
to Terminology D4175.
one millipascal second (mPa·s) = one centipoise (cP); cen-
tipoise is in cgs units.
4. Summary of Test Method
1.5 This standard does not purport to address all of the
4.1 The viscosity of a pitch, over the temperature range of
safety concerns, if any, associated with its use. It is the
about 40 °C to 100 °C above the SP of the material, is
responsibility of the user of this standard to establish appro-
determined using a rotational viscometer.
priate safety, health, and environmental practices and deter-
4.2 The recommended specifications herein are for measur-
mine the applicability of regulatory limitations prior to use.
ing the apparent shear viscosity of binder pitches via a
Specific hazard statements are given in Section 8.
concentric cylinder viscometer. Apparent shear viscosity is the
1.6 This international standard was developed in accor-
ratio of shear stress to shear rate in a unidirectional simple
dance with internationally recognized principles on standard-
shear flow field at steady state conditions. A concentric
ization established in the Decision on Principles for the
cylinder viscometer is useful for measuring the apparent shear
Development of International Standards, Guides and Recom-
viscosity, provided the sample temperature is adequately
mendations issued by the World Trade Organization Technical
controlled, the “end-effects” are negligible, and the gap be-
Barriers to Trade (TBT) Committee.
tween rotor/cup is small and remains constant during the test.
The extrapolated value of apparent shear viscosity at “zero”
2. Referenced Documents
shear rate is called shear viscosity.
2
2.1 ASTM Standards:
5. Significance and Use
5.1 This test method is useful as one element in establishing
1
This test method is under the jurisdiction of ASTM Committee D02 on
the uniformity of shipments.
Petroleum Products, Liquid Fuels, and Lubricantsand is the direct responsibility of
Subcommittee D02.05 on Properties of Fuels, Petroleum Coke and Carbon Material.
5.2 Viscosity is also valuable for rheological characteriza-
Current edition approved Oct. 1, 2023. Published October 2023. Originally
tion of binder pitches. Binder pitch imparts consistency to
approved in 1989. Last previous edition approved in 2018 as D5018 – 18. DOI:
10.1520/D5018-23.
carbonaceous mixes and affects their resistance to deformation.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Binder pitch viscosity is important for assessing mix consis-
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
tency and for evaluating the ease of mix extrusion or molding
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. into artifacts.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
--
...
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: D5018 − 18 D5018 − 23
Standard Test Method for
1
Shear Viscosity of Coal-Tar and Petroleum Pitches
This standard is issued under the fixed designation D5018; 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 covers the determination of the apparent shear viscosity of coal-tar and petroleum-based pitches having a
Mettler softening point (SP) range of approximately 95 °C to 120 °C (see Test Method D3104).
1.2 This test method is applicable only for rotational viscometers.
1.3 Since this test method is based on theoretical grounds, strict adherence to details of the procedure is necessary to comply with
the theoretical requirements.
1.4 The values stated in SI units are to be regarded as standard.
1.4.1 Exception—The values stated in conventional units (centipoise) are to be regarded as the standard for viscosity measurement
only. The SI unit is the pascal second (Pa·s) and one millipascal second (mPa·s) = one centipoise (cP); centipoise is in cgs units.
1.5 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, health, and environmental practices and determine the applicability of
regulatory limitations prior to use. Specific hazard statements are given in Section 78.
1.6 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2
2.1 ASTM Standards:
D3104 Test Method for Softening Point of Pitches (Mettler Softening Point Method)
D4175 Terminology Relating to Petroleum Products, Liquid Fuels, and Lubricants
D4296 Practice for Sampling Pitch
E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
E1953 Practice for Description of Thermal Analysis and Rheology Apparatus
E2975 Test Method for Calibration or Calibration Verification of Concentric Cylinder Rotational Viscometers
3. Terminology
3.1 Definitions:
1
This test method is under the jurisdiction of ASTM Committee D02 on Petroleum Products, Liquid Fuels, and Lubricantsand is the direct responsibility of Subcommittee
D02.05 on Properties of Fuels, Petroleum Coke and Carbon Material.
Current edition approved June 1, 2018Oct. 1, 2023. Published July 2018October 2023. Originally approved in 1989. Last previous edition approved in 20152018 as
ɛ1
D5018 – 89 (2015)D5018 – 18. . DOI: 10.1520/D5018-18.10.1520/D5018-23.
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.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
D5018 − 23
3.1.1 For definitions of terms used in this test method, refer to Terminology D4175.
4. Summary of Test Method
4.1 The viscosity of a pitch, over the temperature range of about 40 °C to 100 °C above the SP of the material, is determined using
a rotational viscometer.
4.2 The recommended specifications herein are for measuring the apparent shear viscosity of binder pitches via a concentric
cylinder viscometer. Apparent shear viscosity is the ratio of shear stress to shear rate in a unidirectional simple shear flow field
at steady state conditions. A concentric cylinder viscometer is useful for measuring the apparent shear viscosity, provided the
sample temperature is adequately controlled, the “end-effects” are negligible, and the gap between rotor/cup is small and remains
constant during the test. The extrapolated value of apparent shear viscosity at “zero” shear rate is called shear viscosity.
5. Significance and Use
5.1 This test method is useful as one element in establishing the uniformity of shipments.
5.2 Viscosity is also valuable for rheological characterization of binder pitches. Bi
...
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