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ASTM D4989/D4989M-90a(2021)
Standard Test Method for Apparent Viscosity (Flow) of Roofing Bitumens Using the Parallel Plate Plastometer (Includes all amendments and changes 1/6/2021).
Translate name
STANDARD published on 1.1.2021
The information about the standard:
Designation standards: ASTM D4989/D4989M-90a(2021)
Publication date standards: 1.1.2021
SKU: NS-1013116
The number of pages: 4
Approximate weight : 12 g (0.03 lbs)
Country: American technical standard
Category: Technical standards ASTM
The category - similar standards:
Annotation of standard text ASTM D4989/D4989M-90a(2021) :
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.
Keywords:
apparent viscosity, bitumen, flow, parallel plate, plastometer, viscosity,, ICS Number Code 91.100.50 (Binders. Sealing materials)
Additional information
| 1. Scope | ||||||||||
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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. 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. |
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| 2. Referenced Documents | ||||||||||
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