Volume 4, Issue 4 (July 1976)

    Asphalt Cements: Pen-Vis Number and Its Application to Moduli of Stiffness

    CODEN: JTEOAD

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    Abstract

    Because of the false softening points of many Canadian asphalts due to the waxy crude oils from which they are derived, highly erroneous values for Pfeiffer's and van Doormaal's penetration index as a quantitative measure of the temperature susceptibility of asphalt cements occur. Consequently, it has been necessary to develop a different quantitative measure for temperature susceptibility, pen-vis number, which is based on an asphalt cement's penetration at 77°F (25°C) and viscosity in centistokes at 275°F (135°C). The development of the pen-vis number of an asphalt cement and its application to the determination of moduli of stiffness of asphalt cements and asphalt paving mixtures are described.


    Author Information:

    McLeod, NW
    Vice-President and asphalt consultantMember of ASTM, McAsphalt Engineering Services, Toronto, Ontario


    Stock #: JTE10215J

    ISSN: 0090-3973

    DOI: 10.1520/JTE10215J

    ASTM International is a member of CrossRef.

    Author
    Title Asphalt Cements: Pen-Vis Number and Its Application to Moduli of Stiffness
    Symposium , 0000-00-00
    Committee D04