What viscosity window is required for reliable bitumen emulsion spray without clogging equipment?

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  • #862
    Marek
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    What viscosity window is required for reliable bitumen emulsion spray without clogging equipment?

    #863
    Sean
    Participant

    The required viscosity depends on nozzle type, spray bar design, and temperature, but the key is maintaining a stable viscosity range that prevents settling and allows consistent flow. Too high viscosity causes poor atomization, pump strain, and nozzle clogging. Too low viscosity increases runoff, poor film build, and uneven coverage. Plants and contractors typically set a target viscosity band at application temperature and validate it by sprayer calibration and field trials. Consistency over time in the tank is as important as initial viscosity.

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