STP807: New Concepts and Discoveries Related to the Strength Characteristics of Plasticized Sulfur

    Gannon, CR
    Senior researcher, group leader, vice president, and environmental specialist, Ashland Petroleum Company, Division of Ashland Oil, Inc., Ashland, Ky

    Wombles, RH
    Senior researcher, group leader, vice president, and environmental specialist, Ashland Petroleum Company, Division of Ashland Oil, Inc., Ashland, Ky

    Hettinger, WP
    Senior researcher, group leader, vice president, and environmental specialist, Ashland Petroleum Company, Division of Ashland Oil, Inc., Ashland, Ky

    Watkins, WD
    Senior researcher, group leader, vice president, and environmental specialist, Ashland Petroleum Company, Division of Ashland Oil, Inc., Ashland, Ky

    Pages: 18    Published: Jan 1983


    Abstract

    The objective of this study was to determine the physical reasons for the high-strength characteristics of plasticized sulfur concrete and to define practical manufacturing techniques.

    The results of this study reveal some very interesting phenomena. The Vroom process of sulfur plasticization exhibits a very unusual display of ordered angular crystallization. The Bureau of Mines' plasticized sulfur shows a different crystallization pattern consisting of bonded spherical bodies. These crystallization phenomena indicate a logical physical explanation for the superior strength characteristics inherent in plasticized sulfur concretes manufactured by entirely different processes. These new discoveries are revealed by microscopic examinations utilizing both the stereomicroscope and the scanning electron microscope. These unique microscopic phenomena offer to the scientific community a different explanation as to why unusually higher strengths are obtained in plasticized sulfur concretes. Classical chemical and physical concepts concerning properties of plasticized sulfurs are complemented by factual microscopy. Practical methods of manufacturing sulfur concretes have been defined.

    Keywords:

    sulfur, brimstone, orthorhombic sulfur, monoclinic sulfur, sulfur allotropes, plasticized sulfur, modified sulfur, metamorphose sulfur, sulfur crystallinity, sulfur concretes, plasticized sulfur concretes, pavements, flexible pavement


    Paper ID: STP31803S

    Committee/Subcommittee: D04.02

    DOI: 10.1520/STP31803S


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