Equiviscous temperature | Article about equiviscous temperature by The Free Dictionary
equiviscous temperature[¦e·kwə¦vis·kəs ′tem·prə·chər]
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.
The temperature at which a bitumen attains the proper viscosity for built-up roofing
References in periodicals archive
Asphalt has an Equiviscous Temperature
(EVT) range that is type specific and represents the point at which the asphalt has the ideal viscosity of workability and adhesion between the layers4.
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.