STP1108

    The Determination of SBS, EVA and APP Polymers in Modified Bitumens

    Published: Jan 1992


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    Abstract

    The use of polymer-modified bitumens has gained importance in road construction over the past few years. The fields of application are relatively varied and include waterproofing sheets as well as binders for surface dressings, porous asphalt, mastic asphalt and asphalt concrete. Those polymers mainly used are styrene-butadiene-styrene SBS copolymers, ethylene-vinyl acetate EVA and atactic polypropylene APP. In addition to adequate and constant quality of the modified binder, the user is entitled to require a qualitative identification and quantitative determination of the polymer incorporated in a bitumen. Infrared absorption spectroscopy is suggested as an appropriate technique for identifying and determining polymer components in the case of SBS and EVA. Two techniques of preparing samples for measurement and two methods of quantitative interpretation are described. As for APP, its quantitative determination is based on selective solubility in different solvents and infrared spectroscopy.

    Keywords:

    modified bitumens, stirene-butadiene-styrene copolymer, ethylene-vinyl acetate, atactic polypropylene, identification, detection, determination, infrared spectroscopy


    Author Information:

    Choquet, FS
    research scientist and first-chemist, the Belgian Road Research Centre, Boulevard de la Woluwe,

    Ista, EJ
    research scientist and first-chemist, the Belgian Road Research Centre, Boulevard de la Woluwe,


    Paper ID: STP17825S

    Committee/Subcommittee: D04.03

    DOI: 10.1520/STP17825S


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