Standard Test Method for Apparent Viscosity (Flow) of Roofing Bitumens Using the Parallel Plate Plastometer (Includes all amendments and changes 1/6/2021).
NORMA vydána dne 1.1.2021
Označení normy: ASTM D4989/D4989M-90a(2021)
Datum vydání normy: 1.1.2021
Počet stran: 4
Přibližná hmotnost: 12 g (0.03 liber)
Země: Americká technická norma
Kategorie: Technické normy ASTM
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)