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    Effects of Application Technique and Temperature on Characteristics of Modified Bitumen Membrane Assemblies

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    Results are presented and discussed of a laboratory study that measures T-peel interply adhesion of polymer modified bituminous membranes assembled using typical field application techniques and a wide range of asphalt temperatures. This evaluation includes both standard and polymer modified asphalts, and additionally examines factors such as: a) interply thickness, b) tendencies for the inclusion of blisters, and c) the effects of dark oven heat aging at 70°C (158°F) of the completed assemblies. The findings indicate that the use of elevated asphalt application temperatures, conventionally proposed to improve adhesion, has little to no effect on interply T-peel strengths. The results also illustrate patterns of interply thickness as it relates to asphalt application temperature and/or application technique. Additional indications reveal a tendency to develop blisters that are dependent on application technique and asphalt temperature. The study also proposes that if interply adhesion is considered to be a primary criterion for improved performance of polymer modified bituminous sheet systems, the use of polymer modified interply asphalts must be given due consideration for use in this application.


    asphalt, polymer modified asphalt, heat aging, membrane assembly temperature, membrane assembly technique, polymer modified bituminous membranes, T-peel adhesion

    Author Information:

    Chernotowich, K
    Twinsburg, OH

    Brzozowski, KJ
    Director, W. P. Hickman Systems, Inc., Solon, OH

    Sanicky, PJ
    Laboratory Technician, W. P. Hickman Systems, Inc., Solon, OH

    Committee/Subcommittee: D08.03

    DOI: 10.1520/STP11452S