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Significance and Use
5.1 The flow behavior of many fluids of interest is non-Newtonian in nature. Non-Newtonian behavior is best studied using rheometry apparatus. Nonetheless, estimations on non-Newtonian behavior may be made by recording viscosity at differing rotational speeds (or shear rates) using rotational viscometers.
5.2 The shear thinning index provides a tool for the estimation of the amount of non-Newtonian behavior.
5.3 The shear thinning index may be used in quality assessment, trouble shooting, specification acceptance, and research.
1.1 This test method describes the determination of the shear thinning index of a shear-rate dependent (non-Newtonian) fluid using a rotational viscometer. A value of the shear thinning index of unity indicates that the material is Newtonian in behavior. A value greater than unity indicates shear thinning behavior.
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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.4 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 (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
E473 Terminology Relating to Thermal Analysis and Rheology
E1142 Terminology Relating to Thermophysical Properties
E2975 Test Method for Calibration or Calibration Verification of Concentric Cylinder Rotational Viscometers
ICS Number Code 17.060 (Measurement of volume, mass, density, viscosity)
|Link to Active (This link will always route to the current Active version of the standard.)|
ASTM E3070-18, Standard Test Method for Shear Thinning Index of Non-Newtonian Liquids Using a Rotational Viscometer, ASTM International, West Conshohocken, PA, 2018, www.astm.orgBack to Top