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This test method deals with the standards for the measurement of apparent viscosity of roofing bitumen by mean of a parallel plate plastometer. This method involves measuring viscosity using pre-determined arbitrary shear stress levels. The method involves molding the sample into a disc of specified dimensions, heating it to a selected temperature and placing it between the plates of a pre-heated apparatus and pressing under the standard conditions for a measured time.
This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.
1.1 This test method covers the measurement of apparent viscosity of roofing bitumen by means of a parallel plate plastometer. This test method is applicable for a viscosity range from 102 to 109 Pa·s [103 to 1010 poises]. See .
Note 1: This relatively simple test method of measuring viscosity uses predetermined, arbitrary shear stress levels. Since roofing bitumens are non-Newtonian, other viscosity test methods may give different results.
1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the 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.
D140/D140M Practice for Sampling Asphalt Materials
D312/D312M Specification for Asphalt Used in Roofing
D450/D450M Specification for Coal-Tar Pitch Used in Roofing, Dampproofing, and Waterproofing
D2171/D2171M Test Method for Viscosity of Asphalts by Vacuum Capillary Viscometer
D3205 Test Method for Viscosity of Asphalt with Cone and Plate Viscometer
ICS Number Code 91.100.50 (Binders. Sealing materials)
UNSPSC Code 30121504(Bitumen); 30151505(Roofing membranes)
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ASTM D4989 / D4989M-90a(2021), Standard Test Method for Apparent Viscosity (Flow) of Roofing Bitumens Using the Parallel Plate Plastometer, ASTM International, West Conshohocken, PA, 2021, www.astm.orgBack to Top