There are many methods to accelerate the aging process of asphalts to determine how susceptible the asphalt is to hardening. These tests use increased temperature, pressure, or both, and assume that the properties after the accelerated test match those if the asphalt is aged at lower temperature and pressure. However, the slope of the logarithm of viscosity versus carbonyl area, known as the hardening susceptibility, does not easily correlate from high-pressure to low-pressure aging conditions. The hardening susceptibility (HS) is a strong function of the oxygen pressure at which the test is run. HS is a function of pressure because the two terms that compose it—the asphaltene formation susceptibility, which determines how susceptible the asphalt is to the production of asphaltenes, and [Formula: see text], which determines how the asphaltenes are affecting the viscosity of the asphalt—are functions of pressure. The pressure dependency is hypothesized to be caused by oxygen diffusion on a molecular scale.


    Zugriff

    Download

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Effect of Oxidation Pressure on Asphalt Hardening Susceptibility


    Weitere Titelangaben:

    Transportation Research Record: Journal of the Transportation Research Board


    Beteiligte:


    Erscheinungsdatum :

    01.01.1999




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



    Effect of Oxidation Pressure on Asphalt Hardening Susceptibility

    Domke, Christopher H. | Online Contents | 1999


    Asphalt Aging: Dual Oxidation Mechanism and Its Interrelationships with Asphalt Composition and Oxidative Age Hardening

    Petersen, J. Claine / Harnsberger, P. Michael | Transportation Research Record | 1998



    Low-Temperature Physical Hardening of Hot-Mix Asphalt

    Romero, Pedro / Youtcheff, Jack / Stuart, Kevin | Transportation Research Record | 1999


    Low-Temperature Physical Hardening of Hot-Mix Asphalt

    Romero, Pedro | Online Contents | 1999