equiviscous temperature
equiviscous temperature
[¦e·kwə¦vis·kəs ′tem·prə·chər] (chemical engineering)
A measure of viscosity used in the tar industry, equal to the temperature in degrees Celsius at which the viscosity of tar is 50 seconds as measured in a standard tar efflux viscometer. Abbreviated EVT.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
equiviscous temperature
The temperature at which a bitumen attains the proper viscosity for
built-up roofing application.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
References in periodicals archive
Hot kettles are heated to extreme temperatures, depending on the type of asphalt, to meet the required
equiviscous temperature or EVT (proper application temperature) for ensuring proper adhesion and waterproofing.
Asphalt should be applied at the
equiviscous temperature (EVT) +/- 25 degrees Fahrenheit.
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